Lennox iComfort Wifi Thermostat Thermostat User Manual

INSTALLER’S SYSTEM SETUP

GUIDE

ꢀ 2012 Lennox Industries Inc.

Dallas, Texas, USA

icomfort Wi-Fiꢀ Thermostat

Touch Screen Programmable Communicating Thermostat

CONTROLS

away

mode

506920−01

09/12

Supersedes 05/12

outdoor

temperature

indoor temperature

set temp

heat

cool

cool−to

icomfortꢀ−Enabled Units

fan is

AUTO

fan is

AOUFTFO

heat to

G71MPP−03 or later

SLP98−01 or later

SL280−03 or later

XC17−02 or later

XP17−02 or later

XP19−06 or later

XC21−05 or later

XP21−01 or later

indoor humidity is 41%

system is cooling

EL296V−01 or later

CBX40UHV−02 or later

CBX32MV−06 or later

9:39 am Aug 15, 2012

Wi−Fi

Shipping and Packing List

THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER

FOR FUTURE REFERENCE

1 − icomfort Wi-Fiꢁ thermostat

4 − Mounting Screws

4 − Wall Anchors

1 − Installation Quick-Start Guide

1 − Installer’s System Setup Guide

1 − Homeowner’s Manual

1 − Warranty card

NOTICE

Read this manual before programming this thermostat.

Use this thermostat only as described in this manual.

09/12

506920−01

*2P0912*

*P506920-01*

Table 6. Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Thermostat wire termination in communicating system . . . . . . . . . . . . . . . . 63

Table 7. Replacement Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table of Contents

Page

Technical Description/Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Settings screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Change settings (dealer info, daylight savings, fan circulate) . . . . . . . . . . .

Table 1. System settings defaults and ranges . . . . . . . . . . . . . . . . . . . . . . .

Set Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Add or Remove Non−communicating equipment . . . . . . . . . . . . . . . . . .

Maintenance Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting up typical icomfortꢀ systems

Indoor Unit

Outdoor Unit

icomfort enabled AC

non−communicating AC

icomfort enabled HP

non−communicating HP

icomfort enabled AC

non−communicating AC

icomfort enabled HP

non−communicating HP

page

icomfort−enabled

furnace

icomfort−enabled

furnace (dual fuel)

Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Dehumidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Adjust a setting screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Configure Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Configure Dehumidifier (Humiditrol®/Aux. Dehum. installed) . . . . . . . . 16

Configure Dehumidification (no dehumidifier installed) . . . . . . . . . . . . . . 17

Humidification and Dehumidification Modesꢀhow they work . . . . . . . . . . . 18

Use the Test Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Set up Equipment Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Use the Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

View and Clear Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Enable Wi−Fi from User Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Personal Computer account registration to icomfort Wi-Fiꢁ server . . . . . . 26

PC Welcome screen, interactive demo, Gelaskins . . . . . . . . . . . . . . . . . . . . 27

Access Installer Program from User Home Screen . . . . . . . . . . . . . . . . . . . 28

Reconfigure a System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Stage Delay Timers & Differentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Smooth Setback Recovery (SSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Heat Pump, Dual Fuel and Balance Points . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Gas Heat Control Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 2. Variable Capacity Furnace Operation . . . . . . . . . . . . . . . . . . . . . . . 35

Table 3. Adjustable Parameters (Installer) . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 4. Adjustable Parameters (User) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 5. Alert Codes and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Homeowner Service Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

not supported

icomfort−enabled

air handler

icomfort−enabled

air handler

CAUTION

This is a 24VAC Class 2 thermostat. Do not install on voltages higher than

30VAC.

Do not switch system to cool if the outdoor temperature is below 45°F

(7°C). This can damage the cooling system.

WARNING

Electric shock hazard.

Always turn off power at the main power source by switching the circuit

breaker to the OFF position before installing or removing this thermostat.

All wiring must conform to local and national building and electrical

codes and ordinances.

506920−01 09/12

Page 2

icomfortWi-Fiꢀ Thermostat − Technical Description and Features

The 24VAC icomfortWi-Fiꢁ thermostat (figure 1) is an electronic communi-

cating, color display touchscreen, 7−day programmable thermostat. It stores

system parameters and settings in nonvolatile memory (i.e., it retains data

when electrical power fails or is turned off). It is designed for 4−wire connec-

tion to other communication devices as listed in figure 1.

BEST PRACTICES! Keep all communication wiring as far away from house

electrical wiring and large electrical appliances as possible (15’ [5m] recom-

mended).

The thermostat also:

ꢂ

supports three languages (English, French, Spanish),

supports air conditioning units or heat pump units with up to four stages

of heat / two stages of compressor operation (2 stages of heat pump

heating, 2 stages of auxiliary back−up heating, 2 stages of emergency

heating),

The icomfortWi-Fiꢁ thermostat can connect to online services via the inter-

net through the homeowner’s Wi−Fi access point. After online registration is

completed, the system may then be accessed by the homeowner from any-

where using a remote internet connection via computer or personal commu-

nicating device.

ꢂ

supports Indoor Air Quality with time-based notification of consum-

ables including media filters, UVC bulbs, humidifier pads, and Pure-

Airꢁ system catalyst service / replacement,

supports variable−capacity / multi−stage heat/cool, universal compati-

bility (gas/electric/heat pump/ac), and is dual fuel capable (icomfort−

enabled HP only) with two balance points.

Thermostat

connections

i+ i− C

Important

Connections to non−communicating outdoor units and accessories are de-

scribed in the Quick−Start Installation guide. (Wiring diagrams are also

shown beginning on Page 59 of this manual.)

Maximum total length of all

connections on the RSBus is

limited to 1500 ft. (450 m).

Max. length between compo-

nents is 300 ft. (90 m).

Supports

RSBus

ꢂ

Humidification Measurement and Control,

Dew Point Adjustment Control

Dehumidification Measurement and Control

Humiditrol Enhanced Dehumidification Accessory (EDA)

Multi-Stage HVAC Systems

Minimum wire

size is 18 gauge

icomfortꢁ −enabled Furnace Control

icomfortꢁ −enabled Air Handler Control

icomfortꢁ −enabled Outdoor Unit Control

Note: icomfort

Wi-Fiꢁ thermo-

stat does not

require

Equipment Maintenance Reminders

AutochangeoverMode −− Permits control of heating, cooling, humidifi-

cation, and dehumidification without user involvement.

External Sensors − outdoor temperature, discharge air

Humidify Control

shielded cable

wiring.

Outdoor Temperature Sensor (option)

Dehumidify Control

Figure 1. icomfort by Lennoxꢀ system

Communicating outdoor units contain a built−in outdoor temperature sensor.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 3

Installation and Setup

IMPORTANT! Make sure the router is capable of, and set to operate in

wireless network ꢀb" mode. Check router utility program or contact

service provider for help. When determining the location for the Wi−Fi ther-

mostat, be sure it is in an area near enough to the homeowner’s Wi−Fi router

to ensure good communications signal between the thermostat and the rout-

er. (Hint: use a smart phone with Wi−Fi to find and determine signal

strength.)

ꢁSystem settingsꢁ (figure 2) appear first. As you use the up/down arrows to

scroll through the settings, the right hand side will show the current value.

For example, current value: 9:39 am Aug 15, 2012 shows the current date

for Time and Date.

To adjust a setting, highlight it, then

press edit

system settings

Time and Date

Refer to the Quick Start Guide for information about installing the thermostat

on a wall and for wiring diagrams for field wiring the thermostat to the system

using one of a number of possible configurations. (Wiring diagrams are also

shown beginning on Page 59 of this manual.)

current value:

Daylight Saving Time

Circulate Fan ON Time

System Name

9:39 am Aug 15, 2012

NOTE − If electric heat strips are used with an icomfortt−enabled air handler,

the strips MUST be configured on the air handler control (AHC) board before

beginning the ꢀdiscovery" sequence below.

Dealer Number

Dealer Name

edit

Dealer Address

Dealer Phone

After all wiring connections are made, apply power to the system. 24VAC will

power up the thermostat.

Dealer Email

back

After power is applied to the thermostat for the

first time, the processor checks the system for

installed communicating devices, the ꢁSo Sim-

ple. So Smart. So Comfortable" screen dis-

plays; followed by ꢁUse this thermostat?"

screen. Touch press here to continue. During

Dealer Website

9:39 am Aug 15, 2012

Figure 2. ꢀSystem settings" screen

(Thermostat 1)

Use this Thermostat?

the setup process, alerts may pop open to provi-

de the installer with information that affects the

press here

setup. Correct the cause of any such alerts

prior to continuing setup.

506920−01 09/12

Page 4

Change settings

Circulate Fan ON Time Range

is 15 to 50 %

Default is 35, inc: 1

up/down

arrows

If you want to change a setting, use one of the Settings change tools shown

in figure 3. (Also, see Set time and date on Page 7.) After changes have

been made, use save to store the changed data or cancel to exit the screen

and return to the list of settings.

set−to

45%

save

cancel

Dealer Number

radio

buttons

Use the arrows to scroll to the Dealer Number setting. Press edit and use the

typewriter tool (shown in figure 3) to enter your dealer number. Press save to

store the identification.

Outdoor Unit Type

Select one

Not Installed

1 Stage A/C Unit

1 Stage HP Unit

2 Stage A/C Unit

2 Stage HP Unit

system settings

To adjust a setting, highlight it, then

press edit

Time and Date

Daylight Saving Time

Circulate Fan ON Time

System Name

current value:

save

cancel

Dealer Number

Dealer Name

keyboard

tool

Dealer Name

edit

Dealer Address

Dealer Phone

Dealer Email

Dealer Website

back

9:39 am Aug 15, 2012

Figure 3. Settings change tools

Figure 4. Entering ꢀDealer Number"

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 5

Circulate fan ON time setting

Table 1. System setting defaults and range

default

system

setting

range/

condition

use

NOTE − If the circulate fan mode is on, a timer is set to measure all the time

that the fan is blowing, regardless if it is running to deliver heating or cooling

or just for circulation.

Time and Date

see Page 7

Enabled

Daylight Saving

Time

ꢁCirculate" is enabled on the user’s home screen or system settings page.

It keeps air circulating from 15% to 50% percent of time. The following set-

tings approximate how long the fan will run at these typical settings:

Enabled/Disabled

Circulate Fan

ON Time

15 to 50% (in 1%

increments)

35%

15% (9 minutes fan run time per hour)

25% (15 minutes fan run time per hour)

35% (21 minutes fan run time per hour)

45% (27 minutes fan run time per hour).

(alpha−numeric

characters)

use keyboard

tool to change

System Name

Dealer Number

ꢀ

****

Table 1 shows the range/condition and defaults for the system settings and

indicates the tools used to make changes.

Dealer Name

Dealer Address

Dealer Phone

Dealer Email

Lennox

ꢀ

(alpha−numeric

characters)

use keyboard

tool to change

1−800−9−LENNOX

ꢀ

Dealer Website

www.lennox.com

506920−01 09/12

Page 6

Set time and date

Use the arrows to select Time and Date;press edit (see figure 5) to proceed

to the ꢁSet current time and date" screen (figure 6).

When ꢁTime and Date" screen (figure 6) appears, enter the correct date as

follows:

ꢂ

Use the left and right arrows to change the month and year.

Touch a day of the month to select it.

To adjust a setting, highlight it, then

press Edit

system settings

Press on the hour or minute; up down arrows appear to allow change.

Touch the am/pm field to toggle it between am and pm.

Time and Date

current value:

Daylight Saving Time

9:39 am Aug 15, 2012

Circulate Fan ON Time

When the correct date and time is set, press save to save settings and

return to previous settings screen.

System Name

Touch next to continue to next screen.

Dealer Number

edit

Dealer Name

Dealer Address

Dealer Phone

Dealer Email

system settings

January 2012

back

Dealer Website

09 : 39 am

9:39 am Aug 15, 2012

10 11 12 13 14

15 16 17 18 19 20 21

22 23 24 25 26 27 28

29 30 31

Figure 5. View/edit time and date

save

9:39 am Aug 15, 2012

Figure 6. Set current time and date

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 7

Use ꢀabout" screen & access ꢀAdd or Remove Non−communicating equipment" screen

The ꢁabout" screen shows details of discovered installed equipment.

From the ꢁsystem devices" screen, use arrow buttons to scroll to a device; then press the about button. Use the up/down arrows to scroll through and view

additional information about the selected device. When finished viewing, press the back button.

Press next to advance to the ꢁAdd or Remove Non−communicating equipment?" screen.

device feature list

Language Support

device description

Equipment Type Name

Furnace

Unit Model Number

Unit Serial Number

Equipment Type Name

Furnace

system devices

System

press ’about’ for

more information on

a highlighted device

Unit Nominal Capacity

Number of Heating Stages

Heating Capacity by Stage

Indoor Blower CFM Range

Control Software Revision

Control Model Number

about

(returns to

system

devices

screen)

Heat Pump

Furnace

Thermostat

back

Add or Remove

Non−communi-

cating equip-

ment?

system devices

System

yes

back

Heat Pump

Furnace

9:39 am Aug 15, 2012

Thermostat

If no, press Next

Step.

back

Figure 7. Using the ꢀabout" screen and accessing ꢀAdd or Remove Non−communicating equipment" screen

506920−01 09/12

Page 8

Add or Remove Non−communicating equipment

Figure 7 (previous page) shows how to access the ꢁAdd or Remove Non−

communicating equipment" screen.

HUMIDITY CONTROL TIPS

The standard humidification mode is ꢁBasic" (humidifier is energized

during a call for heat, if there is a humidification demand).

ꢂ

Sensed outdoor temperature, required for some features, is provided

from one of the following sources:

Adding Non−Communicating Outdoor unitꢀSee figure 8 for details

for adding/removing an outdoor unit.

downloaded via Wi−Fi when available (primary source),

sensor furnished with icomfortꢁ−enabled outdoor units,

separate outdoor sensor connected to the furnace or air handler

ꢁoutdoor sensor" connections.

Adding HumidifierꢀThe procedures in figure 9 describe adding a non−

communicating humidifier which will be controlled by the icomfort Wi-Fiꢁ

thermostat through the ꢁH" or ꢁHUM" terminals on the furnace or air handler.

NOTE − If no source for outdoor temperature is present, ꢀBasic and

Precision Dew Point Control" modes are not available.

Adding DehumidifierꢀThe procedures in figure 10 describe adding a

non−communicatingdehumidifier controlled by the icomfort Wi-Fiꢁ thermo-

stat through the ꢁDH" output on the furnace or air handler.

ꢂ

If you do not have the ability to select or adjust the Humidity RH set-

point on the ꢀIndoor Humidity" button, the control is set for ꢁDisplay

Only." In the installer program, go the equipment button and select

ꢁSystem" and press the edit button. Select ꢁHumidification Control

Mode" and press edit. Choose ꢁBasic," ꢁPrecision," ꢁBasic Dew Point

Control" or ꢁPrecision Dew Point Control" and press save.

Adding non−communicating accessoriesꢀAdding maintenance

timer reminders to accessories is a simple process of ꢁinstalling" the device,

which effectively tells the thermostat to activate access to its service timers.

NOTICE

For details about how the humidification and dehumidification

modes operate and how to configure those modes, see additional in-

formation beginning on Page 18.

Timers are available for two (2) filters, Humidifier pad, UV bulb maintenance

and the PureAirꢁ Air Purification system.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 9

Add Non−Communicating Outdoor unit

To add (or remove) an outdoor unit that is not icomfortꢁ −enabled, you must be at

the ꢁAdd or Remove Non−communicating equipment?" screen.

1. Press the yes button on this screen (see 1).

Add or Remove

Non−communicating

equipment?

System Devices

2. In the ꢁnon−communicating device list" screen, use the arrows (2a) to

highlight Outdoor Unit Type and press edit (2b).

yes

System

3. Touch one of the radio buttons (3a) to select a 1−or 2−Stage AC Unit or a

1−or 2−Stage HP Unit; press save (3b).

Furnace

4. Use arrows (4a) to highlight any red colored text in the device list (e.g.

select Outdoor Unit Capacity; text turns white). Press edit (4b).

to add/remove/adjust a device,

select it, then press edit

5. Use arrows (5a) to make changes; press save (5b). Change other red

settings (if present) using a similar process.

non−communicating device list

Outdoor Unit Type

Humidifier

NOTE − If the defaults are correct, you do not have to make any changes, but you

must press save (5b). When all red text is gone, the back button will appear; press

it to return to the ꢀAdd or Remove Non−communicating equipment?" screen (1).

current value:

Not Installed

Dehumidifier

back

edit

Outdoor Unit Type

Select one

back

non−communicating device list

to add/remove/adjust a device,

select it, then press edit

Not Installed

1 Stage A/C Unit

2 Stage A/C Unit

2 Stage HP Unit

1 Stage HP Unit

Outdoor Unit Type

current value:

Outdoor Unit Capacity

Outdoor Unit 1st Stage Capacity

Humidifier

2 Stage AC Unit

Outdoor Unit Capacity

Range is 18 to 60

Default is 36, inc:1

please view and save all

red settings

Dehumidifier

edit

save

cancel

set−to

save

cancel

back

9:39 am Aug 15, 2012

Figure 8. Add non−communicating deviceꢁOUTDOOR UNIT

506920−01 09/12

Page 10

Add (or Remove) Humidifier (skip if no humidifier is being used)

NOTE − Adding humidity regulating non−communicating devices may be a 2−step procedure:

1st, the device must be installed (this page; after the humidifier is installed, the operation

mode defaults to ꢀBasic").

Before adding a humidifier, be sure that:

ꢂ

the humidifier is wired to the furnace or air handler control as shown on the Optional

Accessories wiring diagram (see Page 61),

2nd, (if you want another mode, i.e. Precision, Basic Dew Point, or Precision Dew Point,

the device requires further configuration (see Page 15).

ꢂ

the entire system is wired, powered up, and the thermostat has detected the system’s

installed communicating devices, and you are at the ꢁAdd or Remove Non−communi-

cating equipment?" screen (see figure 7, Page 8).

To add (or remove) a humidifier,:

system devices

1. Press the yes button on this screen (see 1).

Add or Remove Non−

communicating

equipment?

yes

System

2. In the ꢁnon−communicating device list" screen, use the arrows (2a) to highlight

Humidifier (note the current value, Not Installed) and press edit (2b).

Heat Pump

Furnace

non−communicating device list

3. Touch one of the radio buttons (3a) to select the type of humidifier (or select Not

Installed, if removing humidifier); press save (3b).

to add/remove/adjust a device,

select it, then press edit

Thermostat

4. The previous screen returns, but the current value now shows your selection (4a).

Press the back (4b) button.

Humidifier

current value:

Dehumidifier

5. The ꢁAdd or Remove..." screen reappears with your addition shown in the system

devices list (5a). At this point, you may add more equipment (press yes) or if

finished, press the next (5b) button to advance to the ꢁAdjust a setting..." screen

(see page 15).

Not Installed

Electronic Air Cleaner

Humidifier

Select one

edit

back

6. (If you want other than the default ꢀBasic" mode of operation) Configure the

humidifier as described on Page 15.

Not Installed

Bypass (24VAC) Humidifier

Power (120VAC) Humidifier Bypass and Power Humidifier

(available with furnace equipped systems only)

system devices

System

Add or Remove Non−

communicating

equipment?

yes

save

cancel

Heat Pump

to add/remove/adjust a device,

select it, then press edit

non−communicating device list

Furnace

Thermostat

Humidifier

current value:

Bypass (24VAC) Humidifier

Dehumidifier

Bypass (24VAC) Humidifier

Electronic Air Cleaner

edit

back

9:39 am Aug 15, 2012

Figure 9. Add or remove non−communicating deviceꢁHUMIDIFIER

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 11

Add (or Remove) Humiditrol or Auxiliary Dehumidifier (skip if no dehumidifying device is being used)

NOTE − Adding humidity regulating non−communicating devices may be a 2−step procedure:

1st, the device must be installed (this page; after the dehumidifier is installed, the opera-

Before adding a dehumidifier, be sure that:

ꢂ

the dehumidifier is wired to the furnace or air handler control as shown on the Option-

al Accessories wiring diagram (see Page 61),

tion mode defaults to ꢀBasic").

2nd, set Humiditrol comfort adjust overcooling and the min/max dehumidification set-

points if desired (see Page 16).

ꢂ

the entire system is wired, powered up, and the thermostat has detected the sys-

tem’s installed communicating devices, and you are at the ꢁAdd or Remove Non−

communicating equipment?" screen (see figure 7, Page 8).

To add (or remove) a dehumidifier, you must be at the ꢁAdd or Remove Non−communicating

equipment?" screen.

Add or Remove

Non−communicating

equipment?

system devices

1. Press the yes button on this screen (see 1).

yes

2. In the ꢁnon−communicating device list" screen, use the arrows (2a) to highlight

Dehumidifier and press edit (2b). Note the current value (e.g. Not Installed).

System

Furnace

3. Touch one of the radio buttons (3a) to select the type of dehumidifier (or select Not

Installed, if removing dehumidifier); press save (3b).

to add/remove/adjust a device,

select it, then press edit

4. When you scroll to the Dehumidifier device (4a), (Note the current value, e.g.

Humiditrol.) Click back (4b) to return to the ꢁAdd or Remove..." screen (1).

non−communicating device list

Humidifier

5. The ꢁAdd or Remove..." screen reappears with your addition shown in the system

devices list (5a). At this point, you may add more equipment (press yes) or if

finished, press the next button (5b) to advance to the ꢁAdjust a setting..." screen

(see Page 13).

current value:

Dehumidifier

If ’no’, press Next Step

edit

Not Installed

Electronic Air Cleaner

Dehumidifier

Humiditrol NoteꢁBy default, the Humiditrol Comfort Adjust (HCA) is configured for maxi-

back

mum overcooling and minimum dehumidification setpoint of 40% RH. If these settings are

satisfactory, no further configuration is necessary. If another setting is needed, change HCA

and setpoint as described on Page 16.

Select one

Not Installed

Humiditrol

Auxiliary Dehumidifier

save

cancel

system devices

System

Add or Remove Non−

communicating

equipment?

yes

to add/remove/adjust a device,

select it, then press edit

non−communicating device list

Heat Pump

Furnace

Humidifier

current value:

Dehumidifier

Thermostat

Humiditrol

Electronic Air Cleaner

edit

back

Figure 10. Add or remove non−communicating deviceꢁDEHUMIDIFIER

506920−01 09/12

Page 12

Adjust a setting screen (communicating devices)

Use arrows to select a device from the ꢁsystem devices" list; then use the about button to view information (shown on Page 8) about communicating

devices (information about other devices is not available).

Use resetAll button to un−install all non−communicating devices that were added through ꢁAdd or Remove..." screen and to reset any device settings made

through this ꢁAdjust a setting..." screen to the factory defaults. (While editing a communicating device, the reset button is limited to only the selected device.

You are asked to confirm (shown in figure 11) before resetting all.

Use this screen to access communicating devices’ settings (pressing buttons numbered from 1 to 6 in figure 11 for an example of changing heating airflow;

more examples are shown on the next page). Use back to return to the previous screen or next to go on. A complete list of parameters, their defaults and

setting ranges, begins on page 37.

(if resetAll

is pressed)

To adjust a setting,

highlight it, then press

Edit

system devices

System

about

Furnace

resetAll

resetting a device to its factory default

Thermostat

(resetting ALL devices to their factory default)

settings will cause the system to restart the

setup process.

2 Stage HP Unit

Power (120VAC) Humidifier

Humiditrol

edit

To continue, press CONFIRM or press CANCEL

confirm

cancel

Low Heating Airflow

current value:

system devices

Equipment Name

back

Heating Airflow Control Type

Low Heating Airflow

325

Low Heating Airflow

Range is 325 to 450

Default is 400, inc:25

High Heating Airflow

High Cooling Airflow

Airflow Profile − Cooling

High HP Airflow

reset

edit

set−to

325

Continuous Indoor Blower Airflow

save

cancel

back

Figure 11. Adjust communicating device screens

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 13

Use the up/down arrows to scroll through the device’s settings. The current setting will be displayed on the right−hand side of the screen (figure 12). For

example, current value: disabled. Press edit if you want to modify that setting, or press back to return to the previous screen.

Available settings for the devices depend on the installed components. Shown below is an example of enabling and changing the balance point control from

default (Disabled) to Enabled. After selecting Enabled, press save to save the changes and return to the previous screen.

The returning screen may appear with the message in red ꢁplease view and save all red settings." In the example in figure 13, note that two additional items are

listed in red. Use the arrows to scroll and highlight each item appearing in red. Press edit, make any desired changes, and press save.

When all affected settings have been edited/saved, the red message disappears. Press back to return to the ꢁTo adjust a setting..." screen.

If no more adjustments are necessary, press next to advance to the ꢁselect tests to run" screen (see Page 19).

System

Balance Point Control

Staged Delay Timers

2nd Stage Delay

Staged Delay Timers

current value

2nd Stage Delay

3rd Stage Delay

Disabled

3rd Stage Delay

Enabled

Balance Point Control

Humiditrol Comfort Adjust

Lock In 2nd stage HP by Outdoor Temp

Balance Point Control

High Balance Point

Balance Point Control

edit

please view and save all

red settings

edit

Humidification Control Mode

Select one

Min Dehumidification Setpoint

OK/HDumisiadbBleodundary

Low Balance Point

reset

High Balance Point

Range is −17 to 75

Default is 0, inc:1

reset

Enabled

Humiditrol Comfort Adjust

Humidification Control Mode

Min Dehumidification Setpoint

back

set−to

save

cancel

save

cancel

Figure 12. Accessing device to modify

Figure 13. Modify device settings

G71MPP or SLP98 Furnace Note:

If your icomfort Wi-Fiꢁ thermostat is being used with a G71MPP or SLP98 furnace and is set to variable−capacity mode of operation (the icomfortꢁ default

with these units), the thermostat’s settings for stage timers are ignored (even if shown enabled in the thermostat). The stage timer will be used on the cooling

side. The furnace software sets and controls the firing rates. The only other controlling factor is the stage temperature differentials. In Load−Tracking Variable

Capacity (default for these furnaces), both stage timers and temperature differentials are ignored.

506920−01 09/12

Page 14

Adjust a setting... Configure Humidifier (skip if no humidifier is being used or if humidifier is being used and default

ꢀBasic" humidification mode is desired)

Pre−adjustment REQUIREMENTS:

1st, the device has been installed (see Page 11).

2nd, you pressed next at the ꢀAdd or Remove..." screen (see Page 11).

To adjust a setting, highlight it,

then press Edit

System Devices

System

Configure the device as follows:

System

Air Conditioner

Furnace

1. In the ꢁsystem devices" list, use the arrows (1a) to highlight System. Press edit (1b).

about

edit

2. In the ꢁSystem" list, use the arrows (2a) to highlight Humidification Control Mode.

The current value defaults to Basic mode. Press edit (2b).

Thermostat

3. Touch one of the radio buttons (3a) to select the mode of humidification control;

press save (3b). (After saving, check that the current value now shows the new

selection).

Power (120VAC) Humidifier

4. Use arrows (4a) to highlight any red colored text in the list (e.g. select Max Humidifi-

cation Setpoint). Press edit (4b).

System

resetAll

Humidification Control Mode

2nd Stage Differential

Staged Delay Timers

5. Use arrows (5a) to make changes; press save (5b). Repeat for other red settings.

You will not be able to advance to the next step until all red settings have been

removed..

current value:

back

Basic

edit

2nd Stage Delay

6. Press the back button to return to ꢁAdjust a setting..." screen.

Dehumidification Control Mode

Humidification Control Mode

NOTE − If the defaults for the settings shown in red, you are not required to make any changes,

but you must go into the edit tool, and press save (5b). When all red text is gone, the backbutton

will appear; press it to return to the ꢀAdjust a setting..." screen.

Humidification Control Mode

reset

Select one

System

Max Humidification Setpoint

current value:

Display Only

Precision

Basic

1st Stage Differential

back

2nd Stage Differential

Basic Dew Point Control

Max Humidification Setpoint

Range is 15 to 45

Default is 45, inc:1

Precision Dew Point

Staged Delay Timers

2nd Stage Delay

Dehumidification Control Mode

Humidification Control Mode

Max Humidification Setpoint

OK/Humid Boundary

edit

set−to

please view and save all

red settings

save 3b

cancel

save

reset

cancel

Outdoor Temperature Reading

(returns to

adjust a

setting

back

screen)

9:39 am Aug 15, 2012

Figure 14. Adjust a non−communicating device settingꢁHUMIDIFIER

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 15

Adjust a setting... Configure Humiditrol or Auxiliary Dehumidifier

Pre−adjustment REQUIREMENTS:

1st, the device has been installed (see Page 12).

To adjust a setting,

highlight it,

then press Edit

system devices

System

about

resetAll

edit

2nd, from the ꢀAdd or Remove Non−communicating equipment?", press next.

3rd, in the ꢀAdjust a setting..." screen, configure the device as follows:

Air Conditioner

Furnace

System

1. In the ꢁsystem devices" list, use the arrows (1a) to highlight System. Press

edit (1b).

Thermostat

Humiditrol

2. Humiditrol onlyꢀIn the ꢁSystem" list, use the arrows (2a) to highlight

Humiditrol Comfort Adjust. The current value defaults to Maximum Over-

cooling. Press edit (2b).

System

Dehumidification Control Mode

reinstall

3. Humiditrol onlyꢀTouch one of the radio buttons (3a) to select the over-

cooling level; press save (3b). (After saving, check that the current value

now shows the new selection).

3rd Stage Delay

current value:

4th Stage Delay

4. Use arrows (4a) to highlight Min Dehumidification Setpoint; press edit

(4b). Note the current value (e.g. 45).

Midpoint Overcooling

Lock In 2nd Stage HP by Outdoor Temp

Balance Point Control

Humiditrol Comfort Adjust

Min Dehumidification Setpoint

reset

edit

5. Use arrows (5a) to make changes; press save (5b). (After saving, check

that the current value now shows the new selection).

6. Press the back button to return to ꢁAdjust a setting..." screen.

Humiditrol Comfort Adjust

Select one

Maximum Overcooling

Midpoint Overcooling

back

Minimum Overcooling

Dehumidification Control Mode

current value:

System

Staged Delay TImers

save

cancel

2nd Stage Delay

3rd Stage Delay

4th Stage Delay

Min Dehumidification Setpoint

Range is 40 to 60

Default is 45, inc:1

Humiditrol Comfort Adjust settings are

only available on units equipped with

a Humiditrol dehumidification device.

See Page 18 for description of Min/

Mid/Max overcooling.

edit

Lock In 2nd Stage HP by Outdoor Temp

Balance Point Control

set−to

Humiditrol Comfort Adjust

Min Dehumidification Setpoint

OD/Humid Boundary

reset

save

cancel

(returns to

adjust a

setting

back

Outdoor Temperature Reading Calibr

screen)

9:39 am Aug 15, 2012

Figure 15. Adjust a non−communicating device settingꢁDEHUMIDIFIER

506920−01 09/12

Page 16

Adjust a setting... Configure Dehumidification (no dehumidifying device installed)

(skip if default ꢀBasic" dehumidification mode is desired)

Pre−adjustment REQUIREMENTS:

1st, NO physical dehumidification device has been installed.

2nd, configure the thermostat for dehumidification as follows:

System Devices

To adjust a setting, highlight it,

then press Edit

System

Furnace

1. In the ꢁsystem devices" list, use the arrows (1a) to highlight System.

Press edit (1b).

System

about

edit

Thermostat

2. In the ꢁSystem" list, use the arrows (2a) to highlight Dehumidification

Control Mode. The current value defaults to Display Only. Press edit

(2b).

2 Stage AC Unit

Power (120VAC) Humidifier

3. Touch one of the radio buttons (3a) to select the mode of dehumidification

control; press save (3b).

reinstall

4. Use arrows (4a) to highlight any red colored text in the list (e.g. select Min

Dehumidification Setpoint). Press edit (4b).

System

Dehumidification Control Mode

5. Use arrows (5a) to make changes; press save (5b). Change other red

settings (e.g. Auto Changeover − Humidif. Deadband) using a similar

process.

2nd Stage Differential

Staged Delay Timers

back

current value:

2nd Stage Delay

Display Only

6. Press the back button to return to ꢁAdjust a setting..." screen.

Dehumidification Control Mode

Humidification Control Mode

OK/Humid Boundary

NOTE − If the defaults are correct, you do not have to make any changes, but you

must press save (5b). When all red text is gone, the back button will appear; press it

to return to the ꢀAdd or Remove Non−communicating equipment?" screen.

edit

Outdoor Temperature Reading

reset

Dehumidification Control Mode

current value:

System

Dehumidification Control Mode

Staged Delay Timers

Select one

back

Balance Point Control

Display Only

Precision

Basic

Precision

Min Dehumidification Setpoint

Range is 40 to 60

Default is 45, inc:1

Dehumidification Control Mode

Humidification Control Mode

Auto Changeover − Humidif. Deadband

Max Humidification Setpoint

Min Dehumidification Setpoint

OK/Humid Boundary

edit

set−to

please view and save all

red settings

reset

save

Outdoor Temperature Reading

cancel

save

cancel

back

9:39 am Aug 15, 2012

Figure 16. Adjust dehumidification when not using Humiditrol or an auxiliary dehumidifier

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 17

Humidification and Dehumidification Modesꢁhow they work

HUMIDIFICATION modes

In PRECISION mode, dehumidification occurs if all BASIC conditions are

true, except cooling demand may or may not be present. Also note that:

ꢂ

Maximum overcool from cooling setpoint is 2ºF.

BASIC & PRECISIONꢀThese modes allow user control of RH between 15

and 45%. These conditions must be met for either mode to operate:

ꢂ

Deadband temperature is limited to a minimum of 5ºF (instead of 3ºF

in BASIC or DISPLAY ONLY mode) because of 2ºF overcooling.

ꢂ

humidification mode has been enabled, and

the unit is in HEAT mode, and

Humiditrol or Auxiliary Dehumidifier mode requires:

humidification demand exists (24V present at H), and

BASIC mode also requires presence of heating demand [Y for HP

heat, or W for gas heat (W may be energized with G de−energized)].

NOTE − Systems using icomfortt and a dehumidifier − ꢀDehum" jumper on

furnace/air handler control does not need to be cut when using with a icom-

fort Wi-Fit thermostat.

ꢂ

Wi−Fi is operational or outdoor sensor is installed and set up

dehumidification has been enabled on installer settings, and

the unit is in COOL mode, (or if in AUTO, at least one thermostat cool-

ing call made prior to the dehumidification demand), and

a dehumidification demand exists (RH above setpoint), and

outdoor temp. below 95°F; indoor temp. above 65°F, and

DEW POINTꢀ(Available only if Wi−Fi is operational or outdoor sensor is at-

tached)

Basic Dew Point ControlꢀBasic Dew Point Control adjustment mode will

change the humidification setpoint based on the outdoor temperature and a

user−defined dew point adjustment setting.

ꢂ

for HUMIDITROL, adjust Humiditrol comfort parameters as follows:

MAX adj. − Indoor temp > 2°F above heating setpoint

Precision Dew Point ControlꢀPrecision Dew Point Control adjustment

mode will operate when these conditions are met:

HEAT Setpoint+COOL Setpoint

MID adj. − Indoor temp >

ꢂ

humidification mode has been enabled, and

the unit is in HEAT mode, and

humidification demand exists (24V present at H).

MIN adj. − Indoor temp > 2°F below cooling setpoint

Auxiliary Dehumidifier (stand alone dehumidifier)

When this option is selected, dehumidification will be allowed under the fol-

lowing conditions, provided there is NO call for humidification:

DEHUMIDIFICATION modes

ꢂ

In the absence of heating or cooling calls, or

Simultaneous with blower only calls.

NOTE − Basic and Precision dehumidification modes are functions of the

HVAC system with NO external dehumidification devices installed. Humidi-

trol and Auxiliary Dehumidifiers do not use these modes.

If the blower is required to operate while the auxiliary dehumidifier is running,

a separate wire must be installed from the auxiliary dehumidifier to the indoor

unit’s G thermostat input that will energize G when the auxiliary dehumidifier

is running (see wiring diagram on Page 61).

InBASIC mode, dehumidification occurs if these conditions are met and sig-

nals are present at specific terminals:

ꢂ

dehumidification has been enabled on installer settings, and

the unit is in COOL mode, and

Auxiliary dehumidification is controlled by the thermostat dehumidification

demand.

dehumidification demand exists (RH above setpoint), and

cooling demand exists (Y1 energized).

NOTE − Refer to HCWH Dehumidifier Installation Instructions for installation

recommendations.

506920−01 09/12

Page 18

Use the Tests / Diagnostics features

NOTE − Test mode lasts for 30 minutes (with the temperature updating every

30 seconds) except for the defrost test, which lasts 30 seconds. Tests fea-

ture provides the technician time to manually verify the equipment operation.

select tests to run

Blower

HP Heat − 1st Stage

HP Heat − 2nd Stage

Cooling − 1st Stage

Cooling − 2nd Stage

Dehumidification

The tests feature is available after setup has been completed once. After

you press next in the final setup screen, the ꢁselect tests to run" screen (fig-

ure 18) will appear. (If you want you may skip tests; press skip tests.)

select all

Gas Heat − Minimum Rate

Gas Heat − Maximum Rate

Humidification

If you re−select the tests button from the full option screen (figure 17), a mes-

sage to ꢁpress Start button below to begin system testing" appears. Press

start. The resulting screen will be identical to figure 18.

deselect all

start

skip tests

equipment

diagnostics

setup

tests

alerts

9:39 am Aug 15, 2012

press start button below to begin system testing

Figure 18. Select tests to run screen

start

equipment

tests

diagnostics

setup

alerts

back

current test: Blower

Check Blower Operation

Heating Rate

EXIT

9:39 am Aug 15, 2012

Blower CFM Demand

Blower Off Delay

Blower On Delay

Indoor Blower RPM

Indoor Blower Power

Flame Current

1400CFM

Off

Figure 17. Start testing screen

0.0000%

0.000mA

No Flame

63ºF

To run all of the tests, press select all. All boxes in the list of tests will be

checked. Or, touch box(es) next to test(s) to run certain tests.

Flame Sense

Outdoor Temperature

After the tests have been started, the screen will describe which test is run-

ning and shows a diagnostic summary of each test (see figure 19). After re-

viewing the results and concluding that no further tests are needed, press

next to proceed to next test. The technician must verify that the test proce-

dure is producing the desired result at the equipment.

cancel

9:39 am Aug 15, 2012

Figure 19. Typical tests results screens

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 19

After pressing next after the final test, the ꢁTesting finished" screen will ap-

pear (figure 20). At this point, use the EXIT button (if you have completed the

required setup), or use diagnostics button (to analyze the system), or use

equipment button (if you wish to make any changes to device details).

Set up Equipment parameters

Press equipment to set up equipment parameters and edit details of de-

vices in the system without having to re−run the setup program. When the

ꢁpress start..." screen (figure 21A) appears, press start. The ꢁEquipment pa-

rameters" screen (figure 21B) will open. You may view information about or

modify communicating devices as described earlier in the setup pages, be-

ginning on page 14. Use the arrows to select a device and press edit.

setup

tests

equipment

alerts

diagnostics

Use the arrows to highlight a setting and then press edit (figure 22A). In the

example, the low heating airflow is changed from the default (400) to 325 (fig-

ure 22B). After changing, press save. (note the current value has changed;

figure 22C). Some changes may affect other settings and, if so, those af-

fected will appear in red and require changing/saving to clear the red set-

tings.

The Testing Process is finished

press ’tests’ button to run more tests

setup

tests

equipment

alerts

diagnostics

press ’EXIT’ button to start normal operation

press start button below to edit details of devices in the system

start

back

setup

tests

equipment

EXIT

system devices

about

9:39 am Aug 15, 2012

To adjust a setting,

highlight it, then

press Edit

System

Heat Pump

Furnace

Figure 20. Testing finished screen

Equipment, Alerts, Diagnostics

resetAll

Furnace

Thermostat

Humiditrol

EXIT

edit

Press equipment if you need to set up equipment parameters and edit de-

tails of devices in the system (see Page 20).

9:39 am Aug 15, 2012

Press alerts if you need to run to see any alerts that may present or to view

alerts that have been cleared (see Page 22).

Figure 21. Equipment parameters screen

Press diagnostics if you need to run to analyze the system (see Page 21).

506920−01 09/12

Page 20

When finished, press back; equipment parameters screen (figure 21B re-

turns); then press next. ꢁSelect tests to run screen appears" (Page 19); ei-

ther run tests as before or press skip tests.

setup

tests

equipment

system devices

Equipment Name

Low Heating Airflow

The ꢁTesting process screen" (see figure 20) again appears; use the EXIT

button (if you have completed the required setup), or use diagnostics but-

ton (to analyze the system; see Page 21), or use equipmentbutton again (if

you want to make any further changes to device details).

current value:

Heating Airflow Control Type

Low Heating Airflow

400

High Heating Airflow

edit

Table3 on (on Page 37) shows a list of Editable Parameters for the currently

available devices designed to communicate in this system. Other devices

and additional parameters may be added at a later time. Check the unit

installation manuals (i.e. furnace, air handler, heat pump, ac unit) for current

information and default parameters.

High Cooling Airflow

Airflow Profile − Cooling

setup

High HP Airflow

tests

equipment

resetAll

system devices

Continuous Indoor Blower Airflow

Low Heating Airflow

back

Equipment Name

Heating Indoor Blower OFF Delay

Heating Airflow Control Type

current value:

Run Diagnostics

Low Heating Airflow

325

9:39 am Aug 15, 2012

High Heating Airflow

NOTE −To run diagnostics and insure the system works properly, the system

should be runningꢁset the thermostat so that it will initiate a demand for

cooling, heating, dehumidification, humidification, or continuous fan opera-

tion.

edit

Low Heating Airflow

Range is 325 to 450

Default is 400, inc: 25

High Cooling Airflow

Airflow Profile − Cooling

resetAll

High HP Airflow

set−to

Continuous Indoor Blower Airflow

If you need to run diagnostics to analyze the system, press the diagnostics

button. The ꢁselect a device" list (figure 23A) will open.

Heating Indoor Blower OFF Delay

back

325

save

9:39 am Aug 15, 2012

Use the arrow buttons to scroll through the list of items found on the left of the

screen. The right side of the screen shows which item is selected. Use start

to begin the process. A ꢁwaiting" message displays while the diagnostics are

being conducted, followed by a screen similar to figure 23B.

cancel

Use the arrow buttons to scroll through the information and take note of any

found to be out of operating range.

Figure 22. Edit equipment details

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 21

Press done when finished with the information. Select another device to

diagnose or use EXIT (to close and go to user Home screen) if finished.

From the user’s home screen, press and hold the ꢁLennox" logo in the bottom

right corner of the thermostat to access the installer program. Press yes

when asked if you want to proceed. The installer screen opens at the ꢁsys-

tem and device alerts" screen (figure 24A).

setup

tests

equipment

alerts

diagnostics

The left side of the "system and device alerts" screen shows a list of each

communicating device discovered in the system and check boxes for select-

ing each device. Or, you may use buttons to the right of the System Devices

list to select all (or deselect all). After something has been selected; use

view active to list all active alerts for selected devices. If there are no alerts,

the display will show ꢁThere are no new alerts that require service". If there

are alerts, these are stored for recall but only one alert will appear in the box

at a time (see figure 24B). Use the next button to advance through all the

alerts. If only one alert is present, the next button will not appear.

select a device:

Heat Pump

current selection:

Furnace

start

EXIT

Alerts may pop up on the screen during setup. Details of all active alerts can

only be accessed through the installer’s screens. To view all alerts present at

any time, press the alerts button. ꢁSystem setup / Diagnostics is complete"

(figure 24B) appears; close it and the ꢁSelect devices to view alerts screen

(figure 24A) appears.

DIAGNOSTICS

Furnace

Heating Rate

9:39 am Aug 15, 2012

40.0%

Blower CFM Demand

250 CFM

Off

Use view cleared alerts to list previously active alerts that were cleared by

the device or installer. Until at least one alert has been cleared by the device

or the installer, the message ꢁThere are no new alerts that require service"

will be displayed.

Blower Off Delay

Blower On Delay

Indoor Blower RPM

Indoor Blower Power

Flame Current

Off

waiting

The first alert will be displayed in the alert screen (figure 24B), in order of:

Flame Sense

red alert icon

Outdoor Temperature

88.0ºF

yellow alert icon (service)

done

A red alert icon identifies a system or device issue that can prevent the sys-

tem from working properly or at all, and if allowed to run, could cause dam-

age to the system. The issue raised by the alert must be addressed and

corrected before clearing the alert!

9:39 am Aug 15, 2012

Figure 23. Select device and run diagnostics

View and clear Installer Alerts

NOTE −Service alerts remind users to service filters, humidifier pad, UV light and

PureAirt Air Purification system and are not shown in the installer’s menu.

Press clear (figure 24B) to clear a red alert. The alert will be stored in the

ꢁcleared alerts" file. If an alert cannot be cleared, revisit the alert issue and

make repairs accordingly.

506920−01 09/12

Page 22

setup

tests

equipment

alerts

diagnostics

setup

tests

equipment

System Devices

System

system and device alerts

No Alerts

Furnace

Thermostat

select all

view active

deselect all

view cleared

back

9:39 am Aug 15, 2012

EXIT

9:39 am Aug 15, 2012

tests

setup

equipment

Figure 25. Cleared alert confirmation

View cleared alerts

alert description

active alerts

ALERT 1 of 5

A history of cleared alerts allows the installer to review cleared alerts. This

information can help diagnose problems. Use the arrows to select either se-

lect all or check an item from the list and then press view cleared alerts.

Then, scroll through the alerts using the next button.

Minor Alert Code: 117

System reports:

(Furnace) Poor Ground detected

clear

Latest Occurrence:

10/25/2011 1:13 pm

2 Occurrences

Press back to return to the alerts screen (figure 24A, Page 23).

back

First Occurrence:

10/25/2011 12:01 pm

setup

tests

equipment

alert description

9:39 am Aug 15, 2012

ALERT 1 of 5

cleared alerts

Minor Alert Code: 117

System reports:

(Furnace) Poor Ground detected

Figure 24. Selecting and viewing alerts

Latest Occurrence:

10/25/2011 1:13 pm

2 Occurrences

First Occurrence:

10/25/2011 12:01 pm

After all active alerts have been cleared, only the back button remains and

the alerts box shows ꢁNo Alerts" (Figure 25).

back

9:39 am Aug 15, 2012

Press back to return to the system and device alert screen (figure 24A,

Page 23).

Figure 26. Cleared alerts screen

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 23

Enable the thermostat’s Wi-Fi feature from the Home screen

Secure Connection Recommended!

network security key or passphrase

press any line to edit it

network name (SSID)

none

WEP

5.2

Make sure the router is capable of, and set to operate in

wireless network ꢁb" mode. Check router utility program or

contact service provider for help. A secure wireless net-

work is recommended over an open (unsecured) network.

You will need the homeowner’s approval and router pass-

word to enable Wi−Fi in a secured connection.

displays information here as keys pressed

security

is WPA2

press here to enter network name

5.2

press here to enter Wi−Fi AP (router) password

WPA

password

WPA2

Enable Wi−FiꢁTo enable the Wi−Fi feature to com-

municate with a wireless router:

7 END

connect

1. Press and release ꢁWi−Fi" in the lower left corner of

the HOME screen (see START HERE). The screen

changes from the Home Screen to the WI−FI SET-

TINGS screen.

type the network security key or passphrase for

(locked Wi−Fi Access Point [AP])

press here to enter Wi−Fi AP (router) password

WI−FI SETTINGS

2. Press the Wi−Fi enable button.

3. Press next as necessary; then press accept after

reading the User Agreement.

7 END

connect

NETWORKꢀSETTINGS

4. Press NETWORK SETTINGS; this screen shows a

graphical view of buttons representing Wi−Fi options

OPEN and SECURE wireless networks and a button

for creating a new access point (AP).

Wi−Fi

disable

5.1

7 END

5.0

5.2

5.0 UNSECU-

RED ACCESS

POINT

5.1 SECURE

Access Points

5. Decide which of the following buttons you need to

select:

5.0ꢀOPEN Wi−Fi Port (no password required).

5.1ꢀSECURE Ports (requires router password).

5.2ꢀCreate new AP (Access Point).

5.2 CREATE NEW AP

5.2aꢀWhen creating a new AP, you have the option

of selecting a security level (default is none; choose

from WEP, WPA, WPA2, depending on the security

defined in the homeowner’s router); the password

field appears.

User Agreement

WI−FI SETTINGS

next...

START

HERE

Wi−Fi

6. When you touch in one of the input fields (press here

to enter...), the keyboard tool appears. Enter pass-

word (if simply logging into an existing network) or

enter the network name if creating a new AP. If you

mistype the password or if you cannot access the

selected network, a message will alert you to retry.

7. Press connect to complete the connection. Note

that ꢁWi−Fi enable" button on the Wi−Fi SETTINGS

screen changes to ꢁWi−Fi disable".

Wi−Fi

enable

NETWORK

SETTINGS

decline

Figure 27. Wi−Fi setup

506920−01 09/12

Page 24

NOTE − Time from pushing the registration button on the thermostat and re-

ceiving the consumer portal register link from your email on your computer is

from 5 to 15 minutes.

Registering the icomfort Wi-Fiꢀ thermostat

From NETWORK SETTINGS screen, you can change to the desired net-

work as shown in figure 28. Enter security key or passphrase. ꢁX" back to the

WI−FI SETTINGS screen.

After registration has been completed, any available firmware downloads

will immediately start downloading to the thermostat.

REGISTRATION

NOTE NETWORK’s marked with * - Selecting one of these

wireless networks may result in an unreliable connection to

your thermostat. Press help ꢀ?" for tips on improving signal

strength.

online weather information

choose a wireless network

(returns to

WI−FI SETTINGS

screen)

NETGEAR

NETWKB

NETWKC

NETWKD *

enter your email

re−enter your email

System Desc

type the network security key or passphrase for

NETGEAR

add new

network

WI−FI SETTINGS

9:39 am Aug 15, 2012

Wi−Fi

(returns to

HOME

screen)

AP Info

dis−

connect

Wi−Fi

9:39 am Aug 15, 2012

thermostat

not

registered

Firmware

update

auto

Wi−Fi

enabled

connected

press to

change network

settings

press to enable

/ disable Wi−Fi

press to change

thermostat regis- ware update between

tration ꢁauto" and ꢁoff"

press to toggle firm-

Figure 28. Change Networks

Registration for online access

From the WI−FI SETTINGS screen, press the ꢁthermostat not registered"

NOTE −

If any downloads are available for the thermostat they will start downloading

Connection to server has not bee established or it has been lost. Please

wait until a connection is established.

right away. When new firmware is being downloaded or when Gelaskins are

being installed, the thermostat screen will temporarily go blank and running

button (see figure 29).

9:39 am Aug 15, 2012

Wi−Fi

units may cease operation while the system is being reset to accommodate

the new changes. This is normal and can last a couple minutes.

Enter homeowner email address twice and press the register button.

A pop up screen then appears to notify the user to check their home comput-

er for instructions to complete the registration. After the server sends the

email with the network link, registration and account creation must be com-

pleted on the homeowner’s personal computer (see Page 26).

Figure 29. Registering the system for online access

For any issues with Wi−Fi connections, refer to Wi−Fi Troubleshooting

Checklist 507037−01.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 25

Personal Computer account registration for icomfort Wi-Fiꢀ server

NOTE − This following information is customer setup in-

structions and is shown here to allow the installer to help

walk the customer through the setup process.

After registering through your icomfortWi-Fiꢁ thermostat in-

terface, go to the homeowner’s computer and locate the

email sent from the server:

Dear Customer,

Congratulations on your purchase of a Lennox icomfort ther-

mostat! You are only a few steps away from total control of

your Lennox icomfort system. Registering your thermostat

will allow you to remotely access it from anywhere in the

world on any device with an internet connection. Please com-

plete your Lennox icomfort registration by clicking the link be-

low:

NOTE − if the customer has already setup an account,

click the ꢀClick Here" button to access that account.

Click on the Register link; the screen (to the left) will appear.

Fill in the User Name and Password fields and check the

agree to terms and conditions box. ClickCreate User button.

A series of pages and prompts follows to provide guidance

through profile setup and user preference definitions.

Figure 30. icomfort Wi-Fiꢀ Registration screen

506920−01 09/12

Page 26

Personal Computer Welcome page; Interactive Demo; Online icomfort information; Using Gelaskins

Welcome home.

Access all the great Wi−Fi enabled features on your icomfort thermostat

from our secure web portal. After signing in, you´ll be able to view your icom-

fort system settings, adjust the temperature and view reminders and alerts ˘

just as you would on your icomfortWi-Fiꢁ thermostat at home. With a famil-

iar look and settings this simple, you should feel right at home. Don´t forget to

check out the available Apps and customizable skins using the links on the

right side of the page. From the welcome page, you may also click on links to

launch an interactive demo or learn more abouticomfort Wi-Fiꢁ.

How Do I Turn on Skins on the icomfort Wi-Fiꢀ Thermostat?

From the thermostat Home screen, press then display setting then

power save buttons. From the pop−up menu, select skins. The skin picture

will appear after 30 seconds of inactivity.

How Do I Upload a Skin?

Skins should be ordered from www.gelaskins.com/lennoxicomfort. After or-

dering the skin, Gelaskins will email the image file (.jpg) to the homeowner.

This ꢁ.jpg" has been altered to display correctly on the icomfortWi-Fiꢁ Ther-

mostat. Images can be uploaded to the icomfortWi-Fiꢁ thermostat from the

consumer portal site (www.myicomfort.com) under the tab "skins".

Figure 31. PC Welcome Screen

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 27

Access installer program from Home screen

To access the installer program after the unit has been placed in operation

and the user home screen is displayed, press the ꢁLennox" logo and hold for

5 seconds (see figure 32). The system will access the installer screens.

A message screen stating ꢁQualified Lennox equipment installer warning"

screen appears (Figure 33). Press yes to proceed (no returns to the home

screen).

WARNING!

away

outdoor

temperature

The following screens are intended for use by qualified Lennox

equipment installers only.

mode

indoor temperature

set temp

heat

cool

Do you want to proceed?

cool−to

yes

fan is

AUTO

fan is

AOUFTFO

heat to

indoor humidity is 41%

Figure 33. Qualified Lennox equipment installer warning

system is cooling

When you press yes, the thermostat’s processor will search for communi-

cating devices in the system. The next display will be a summary of all alerts

detected (see figure 34A).

9:39 am Aug 15, 2012

Wi−Fi

After initial installation, if an alert is present when you are making changes to

settings, no action on the alert is mandatory.

Figure 32. Enter installation setup mode from home screen

506920−01 09/12

Page 28

Reconfigure a system

If any component of the HVAC system has been changed, e.g. replacing an

outdoor sensor, reconfiguring the system will be required. To begin reconfi-

guring a system (after you have accessed the program from the Lennox logo

[previous page]), press the setup button (1, figure 34A). The ꢁStart system

configuration" screen (fig. 34B) will appear. Press start (2, figure 34B) to pro-

ceed. The ꢁRe−configure confirmation" screen (fig. 34C) will appear. This re-

minder notes that system configuration may affect some existing device set-

tings and prompts to confirm or cancel the configuration process.

Press confirm (3, figure 34C) to continue system configuration; the screen

will change to the system discovery screen. At this point, the program goes

through the same setup as the initial setup process which begins on

Page 4.

NOTE − ꢀCompatible device found" screen (shown below) appears only

when a device has been removed and replaced with a compatible device.

Missing

Found Compatible

Device Equipment Type No.

Model No. (control model no.)

Serial No. (control serial no.)

Device Equipment Type No.

Model No. (control model no.)

Serial No. (control serial no.)

Settings were not copied

setup

tests

equipment

alerts

diagnostics

system and device alerts

Select Devices

System

setup

tests

equipment

alerts

setup

press start button only if you wish to setup a new system,

diagnostics

tests

Furnace

Thermostat

equipment

alerts

diagnostics

select all

or to re−setup an existing system

configuring the system may effect some devices.

view active

view cleared

EXIT

deselect all

confirm to continue or press cancel

start

back

confirm

cancel

9:39 am Aug 15, 2012

EXIT

9:39 am Aug 15, 2012

EXIT

9:39 am Aug 15, 2012

Figure 34. Re−configuration process

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 29

Stage Delay & Differential Settings (Installer settings)

1st Stage Differential1ꢀStage 1 differential is used in all thermostats. The

default is 1.0°F but can be programmed between 0.5° and 3.0°F in 0.5°F in-

crements.

previous stage of heating or cooling will not raise or lower the room tempera-

ture to the setpoint in a given time.

When Disabled is selected all stage delay timers are disabled. This means

stages are changed based on the temperature and not their timer delays.

From the equipment button, use the arrows to select 1st Stage Differential.

Press edit. Use the up/down arrows to adjust to the desired setting and

press save.

NOTE − The 2nd Stage Delay Timer (when Staged Delay Timers is Enabled)

is used for both HEATING and COOLING. However, if the system has a vari-

able capacity furnace, 2nd Stage Delay Timer will only be used for COOL-

ING (not for heating, as the variable capacity algorithm ignores delay tim-

ers).

2nd Stage Differential (where applicable)2ꢀThe default is 1.0°F but can be

programmed between 0.5° and 8.0°F in 0.5°F increments.

3rd Stage Differential through 6th Stage Differential (where applica-

ble)3ꢀThe default is 0.5°F but can be programmed between 0.5°F and

8.0°F in 0.5°F increments.

2nd thru 6th Stage Delay timer (where applicable)5ꢀIf Staged Delay Tim-

ers are Enabled, the default delay is 20 minutes but can be programmed

from 5 to 120 minutes in 5−minute increments. If first stage fails to advance

the ambient temperature toward the setpoint by 1.0°F in the programmed

delay time, then the second stage is activated.

NOTE − Each stage’s differential is based on the previous stage’s differential

endpoint. For example, in cooling mode, if stage 1 differential is set to 1.0ºF,

then the system comes on 0.5ºF above setpoint and the 2nd differential

starts at the 0.5ºF stage 1 endpoint and extends to 2nd stage differential end-

point.

Heat Cool Stages Locked In6ꢀdefault Disabled (heat/cool stages are

turned off separately). If changed to Enabled, heat/cool stages are turned off

together. Scroll to Heat Cool Stages Locked In; press edit. Use arrows to

select between Disabled or Enabled. Press save.

NOTE − In normal operation, the end of the cooling demand is at the setpoint

−0.5ºF and the end of the heating demand is at the setpoint +0.5ºF.

Lock In 2nd stage HP by Outdoor Temp7ꢀdefault Off (heat pump stage 2

operates normally). Use this setting to lock in the 2nd stage compressor

when the outdoor temperature is at or less than the LOCK TEMP setpoint.

Scroll to Lock In 2nd stage HP by Outdoor Temp; press edit. Use arrows to

select a temperature between 40 and 55ºF. Press save.

Staged Delay Timers4ꢀdefault Enabled. When ON, all stage delay timers

(stages 2 through 6) are enabled and will serve to bring on additional stage(s)

of cooling or heating on a timed basis (default 20 minutes) in cases when the

506920−01 09/12

Page 30

Smooth Setback Recovery (SSR)

SSR is an algorithm designed to ꢁsmoothly" reach a occupied program

schedule setpoint. The algorithm looks 2 hours ahead for the occupied pro-

gram schedule period’s setpoint. If the occupied setpoint requires the sys-

tem to turn on (present temperature below the heat setpoint or above the

cool setpoint), then SSR will calculate a new setpoint. Once initiated, SSR

monitors the change in room temperature and calculates a new setpoint ev-

ery 30 seconds. Then SSR provides this new setpoint for the heating and

cooling algorithms; the new setpoint will be displayed on the User Interface.

Rules for SSR:

1. SSR is enabled when ꢁSmooth Setback Recovery" is set to enabled

and the program schedule is turned on.

2. When SSR is enabled, then it will check for a new setpoint every 30

seconds.

3. The SSR Target Program Schedule setpoint is always 2 hours ahead.

4. When SSR starts, then the Current SSR setpoint will equal the current

program schedule setpoint.

5. When a new program schedule period starts, then the New SSR set-

point will equal the new program schedule period’s setpoint, unless

there are two or more program periods within the 2 hour window. In this

case, SSR will track the highest heat setpoint or the lowest cool set-

point found in the 2 hour window.

6. SSR will NOT run during a program schedule HOLD.

7. SSR does NOT look at the current temperature.

8. If the target program heat setpoint is lower than the Current SSR heat

setpoint, then the New SSR Heat Setpoint will equal the Current SSR

Setpoint.

9. If the target program cool setpoint is higher than the Current SSR cool

setpoint, then the New SSR Cool Setpoint will equal the Current SSR

Setpoint.

10. The New SSR Setpoint will be displayed on the User Interface.

11. SSR does NOT control the equipment.

12. SSR does NOT turn off Stage Delay Timers.

13. SSR does NOT round the newly rounded setpoint, but the setpoint

shown on the user interface is rounded.

14. SSR will NOT change the Temperature Dead band.

15. SSR will not adjust a setpoint to violate the Temperature Dead band.

16. SSR will not overshoot the Target Setpoint.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 31

Heat Pump, Dual Fuel and Balance Points

IMPORTANT − The Balance Points feature requires that a sensed out-

door temperature is provided to the thermostat. This can be either a

connection to Wi−Fi (for local temperature information) or a connection

to an outdoor sensor (included in all communicating icomfortt−en-

abled heat pumps; optional outdoor temperature sensor X2658 for

non−communicating heat pumps).

pump is not as effective at a lower outdoor temperatures, it may be more

comfortable to use the auxiliary electric heat or the furnace (in dual fuel sys-

tems, it may be more economical) to satisfy a demand for heat. The low bal-

ance point options are from −20°F to the high balance point temperature. The

setpoint can be adjusted in 1.0°F steps.

High Balance Point

If the outside temperature is above the programmed high balance point (set

by default at 50°F), auxiliary electric heat operation or furnace operation (in

dual fuel system) is not allowed. This ensures that the lower cost heat pump

operation will satisfy the heating demand, rather that the more expensive

auxiliary electric heat. The high and low balance points will not lock out both

compressor heat and auxiliary heat/furnace at the same time.

Heat Pump Balance Points

The LOW and HIGH setpoints may be controlled by the icomfortWi-Fiꢁ ther-

mostat using the LOW and HIGH Balance Points feature. To enable the Bal-

ance Points feature, go to the installer section equipment button. Scroll

down to the ꢁSystem" screen, select edit and scroll down to Balance Points

Controls. Use arrows to select Enabled and then press save. See the flow-

chart (Page 33) for a simplified explanation of how balance points control

system operation.

Dual Fuel Applications (Communicating Systems Only)

Dual fuel applications, which include both a Heat Pump and a gas furnace,

will provide multiple stages of heating. For example, a two−stage heat pump

would deliver two stages of heat. The gas furnace can add two to four more

stages of heat. Figure 35 flow chart illustrates Dual Fuel operation with Bal-

ance Points.

Low Balance Point

If the outside temperature is below the programmed low balance point (set

by default at 25°F), compressor operation is not allowed. Since the heat

506920−01 09/12

Page 32

Shut down HP

Stg 1...Stg 2

Abbreviations:

FURN = auxiliary heat provided by gas furnace

HP = compressor heat

T’stat

LBP = Low Balance Point

HBP = High Balance Point

T’stat = thermostat

YES

heat

demand

FURN

heat

lockout

NOTE 1 − Each Heat Pump and Furnace Heat stage will oper-

ate until it meets the demand or until its stage timer lapses (20

minutes by default). If the timer lapses before the demand is

met, the system brings on the next stage in order of:

HP−stg−1, HP−stg−2, FURN−stg−1, FURN−stg−2.

Operate HP

Stg 1...Stg 2

HP stage(s) operate first;

then FURN stage(s) (if

needed; see NOTE 1)

NOTE 2 − The chart below illustrates how the balance points

control whether HP or FURN will operate to provide heat.

or above

HBP

outdoor

temperature

is...

T’stat

heat

demand

between

HBP and LBP

Operate HP

Stg 1...Stg 2

YES

(See NOTE 2)

COMPRESSOR ONLY

HBP − FURNACE

at or

below

LBP

50ºF

LOCKOUT TEMPERATURE

T’stat

heat

demand

YES

EITHER COMPRESSOR

OR FURN HEAT

LBP − COMPRESSOR

LOCKOUT TEMPERATURE

25ºF

Operate FURN

Stg 1...Stg 2

FURN ONLY

Operate FURN

YES

Stg 1...Stg 2

T’stat

heat

demand

Heat

pump

lockout

YES

NOTE 3 − If emergency heat is selected, Furnace is used.

T’stat

heat

YES

demand

Shut down FURN

Stg1...Stg 2

Figure 35. Dual Fuel Operation with Balance Points

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 33

Gas Heat Control Mode

Increase firing

rate to 100%

until thermostat

demand is

Differential

less than 2nd stage

differential

Differential

less than 3rd stage

differential

Differential

less than 4th stage

differential

THERMOSTAT

DEMAND

satisfied

YES

Increase firing rate

to calculated 2nd

stage firing rate

Increase firing rate

to calculated 3rd

stage firing rate

Starting firing rate

as determined by

variable capacity

algorithm (35 to

100%)

SYSTEM

IDLE

T’stat

demand sat−

isfied in less than

5 minutes

T’stat

demand sat−

isfied in less than

5 minutes

Differential

less than 2nd stage

differential

YES

Differential

less than 4th stage

Differential

less than 3rd stage

differential

Continue at

starting firing rate

differential

YES

T’stat

demand

satisfied

Firing rate

increased by

5% every 5

minutes up to

100% firing rate

Firing rate

increased by

5% every 5

minutes up to

100% firing rate

YES

T’stat

demand

satisfied

T’stat

demand

satisfied

YES

Figure 36. Variable Capacity Operation Flow Chart

506920−01 09/12

Page 34

The thermostat monitors room temperature, previous heat cycle times, and

target setpoint to determine the starting firing rate, and any required firing

rate increases or decreases during the thermostat demand.

Variable Capacity Control of Gas Heat Mode

(G71MPP and SLP98V)

The thermostat includes a feature that provides variable capacity control of

the gas heat mode. The purpose of variable capacity control is to keep the

room temperature at, or near, the desired setpoint with minimum system

cycling. The thermostat bases its ꢁdecisions" for furnace operation control

using the following inputs:

During a heat demand, the icomfort thermostat monitors the differential be-

tween setpoint and room temp. As this differential increases and reaches

field adjustable levels (stages), the thermostat will increase firing rate ac-

cordingly to maintain room temperature and ultimately satisfy the heat de-

mand. On the next heat cycle, the icomfort stat will calculate a new starting

firing rate (in 1% increments) with the goal of maintaining room temperature

at, or near, thermostat setpoint with a minimum of system cycling. The prin-

ciples of operation are described in figure 36 and table 2.

ꢂ

Room temperature,

History of cycle times (how long does it typically take to bring the room

temperature to the desired setpoint),

ꢂ

Target setpoint, and

Differential temperature settings between 1st − 4th stage.

Table 2. Variable Capacity Furnace Operation

The thermostat uses this information to vary the heating capacity to efficient-

ly satisfy the heating demand. The full range of the furnace heating capacity

(low end is a percent of the 1st stage capacity; high range is 100% of full

capacity) is used. When in variable capacity gas heat mode, the furnace op-

eration includes longer run times at lower heat stages.

T’stat Demands

Operation

None

Furnace is off

First level heat de-

mand.

1. Furnace BTU rate is calculated by the icomfort integrating al-

gorithm.

2. Furnace firing rate will continue at current heating rate until

first stage demand is satisfied or an additional thermostat de-

mand is received.

Table 2 details the variable capacity furnace operation.

Staged operation

Second level heat

demand added

1. Thermostat will immediately increase variable capacity fur-

nace firing rate to the calculated BTU percentage represent-

ing the second stage thermostat demand.

Some furnaces can be configured to provide up to four stages of gas heat

operation. When staged heating is chosen, the icomfort thermostat allows

you to choose between 1, 2, 3 and 4 stages of heat.

2. Furnace firing rate will increase by 5% every 5 minutes (up to

100% if second stage thermostat is not satisfied.) If thermo-

stat second stage demand is satisfied the current firing rate

will continue until all thermostat demands are satisfied.

Single−stage heat: 1st stage provides 100% of full capacity.

Two−stage heat: 1st stage provides 70% of full capacity; 2nd stage

provides 100% of full capacity.

Third level heat de-

mand added.

1. Thermostat will immediately increase variable capacity fur-

nace firing rate to the calculated BTU percentage represent-

ing the third stage thermostat demand.

Three−stage heat: 1st stage provides 60% of full capacity; 2nd stage

provides 80% of full capacity; 3rd stage provides 100% of full capacity.

Four−stage heat: 1st stage provides 35 or 40% of full capacity; 2nd

stage provides 60% of full capacity; 3rd stage provides 80% of full ca-

pacity; 4th stage provides 100% of full capacity.

2. Thermostat will increase the firing rate by 5% every 5 minutes

(up to 100% if third stage thermostat is not satisfied.) If ther-

mostat third stage demand is satisfied the current firing rate

will continue until all thermostat demands are satisfied.

Fourth level heat de-

mand added.

Icomfort thermostat will immediately set variable capacity

furnace firing rate to 100% until all thermostat demands are

satisfied.

SLP98 variable capacity furnaces BTU’s firing rates can be incremented by

as little as 1% (35% to 100% range available) as the thermostat may dictate.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 35

Interesting points about the Proportional Integral Algorithm

(PIA):

Load−trackingVariable Capacity FAQs

(SLP98V only)

What is Load−tracking Variable Capacity? When an SLP98 Furnace is

connected to an icomfort Wi−Fiꢁ thermostat, the thermostat takes complete

charge of the variable capacity staging of the furnace. Load−tracking Vari-

able Capacity is only available with icomfort Wi−Fi thermostats.

ꢂ

The further temperature is from the current set point, the higher PIA

sets the heating rate.

The longer away from a programmed set point, the higher the heating

rate.

How is Load−tracking Variable Capacity different from Variable Ca-

pacity? Load−tracking Variable Capacity will smoothly track the load (sensi-

ble temperature changes) up and down and adjust the furnace heating rate

both ways. Variable capacity only tracks the load upward (rising tempera-

ture). Variable capacity uses the thermostats stage differentials but not

stage timers. LVC disregards both stage differentials and stage timers.

If needed, PIA will turn heating on and off in short cycles when there

is a heat demand that is lower than the lowest the furnace can provide.

If the heat demand is higher than the minimum the furnace can provide,

the furnace will run without shutting off.

As the room temperature rises nearer the set point, the heating rate will

decrease.

What makes Load−tracking Variable Capacity work? With icomfort

ꢁ

As the room temperature falls further away from the set point, the heat-

ing rate will increase.

Load−trackingVariable Capacity, the thermostat uses a Proportional Integral

Algorithm (PIA) to control firing rates of the furnace. The algorithm in the

Load−tracking Variable Capacity provides much more precise control over

the furnace than the Variable Capacity algorithm.

ꢂ

The stage differentials have no effect when running the PIA.

The second stage timers have no effect when running the PIA.

506920−01 09/12

Page 36

Table 3. Adjustable Parameters Table (Installer)

Parameter Name:

Default

Parameter Value Setting

Increment

Installer entry

System (Go to equipment button and scroll to System) NOTE − All of the following changes are made on the stat.

Equipment Name

ꢀ

Calendar Time

Enabled

5ºF

(keyboard input screen)

Calendar Time, Run Time

Enabled, Disabled

3 to 9ºF

ꢀ

Filter 1 Timer Selection

Filter 2 Timer Selection

UV Bulb Timer Selection

Humidifier Pad Timer Selection

PureAirꢁ Timer Selection

Smooth Setback Recovery

Auto Changeover − Temp Deadband

Electric Heat Control Mode

Gas Heat Control Mode: (SLP98, G71MPP)

(SL280, EL296)

ꢀ

1ºF

ꢀ

Standard

Load Tracking

Staged

Standard, Even Heat

Load Tracking Variable Capacity, Variable Capacity, Staged

Staged only

ꢀ

Max Heat Setpoint

90ºF

40 to 90ºF

1ºF

ꢀ

Min Cool Setpoint

60ºF

60 to 99ºF

Heat Cool Stages Locked In

*1st Stage Differential

*2nd Stage Differential

*3rd Stage Differential

*4th Stage Differential

*5th Stage Differential

*6th Stage Differential

Stage Delay Timers

Disabled

1.0ºF

Enabled, Disabled

0.5 to 3ºF

0.5ºF

ꢀ

1.0ºF

0.5 to 8ºF

0.5ºF

0.5 to 8ºF

0.5ºF

0.5 to 8ºF

0.5ºF

0.5 to 8ºF

0.5ºF

0.5 to 8ºF

Enabled

20 Minutes

Enabled, Disabled

5 to 120 Minutes

*2nd Stage Delay

5 Min

*3rd Stage Delay

*4th Stage Delay

*5th Stage Delay

*6th Stage Delay

*Number of stages shown in thermostat is dependent on equipment that is installed. Electric heat will bring on 2 elements at a time if available.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 37

Table 3. Adjustable Parameters Table (Installer)

Parameter Name:

Lock in 2nd stage HP by Outdoor Temp

Balance Point Control

Default

Off

Parameter Value Setting

Off, 40ºF (4ºC), 45ºF (7ºC), 50ºF (10ºC), 55ºF (13ºC)

Enabled, Disabled

Increment

Installer entry

ꢀ

Disabled

Maximum

50ºF

Humiditrol Comfort Adjust

High Balance Point

Maximum, Midpoint, Minimum Overcooling

−17ºF to 75ºF

ꢀ

1ºF

Low Balance Point Control

Defrost Target Discharge Temp

25ºF

−20ºF to 72ºF

55ºF

50ºF to 60ºF

Display Only, Basic, Precision (only available when

NO dehumidifier is installed)

Dehumidification Control Mode

Humidification Control Mode

Display Only

ꢀ

Display Only, Basic, Precision, Basic Dew Point Con-

trol, Precision Dew Point Control

Autochangeover Humidification Deadband

Max Humidification Setpoint

45%

40%

50%

5% to 10%

15% to 45%

40% to 60%

45% to 60%

−10ºF to 10ºF

Min Dehumidification Setpoint

Max Dehumidification Setpoint

OK/Humid Boundary

Outdoor Temperature Reading Calibration

OUTDOOREQUIPMENT (Go to EQUIPMENT button and scroll to HEAT PUMP or AIR CONDITIONER.)

Equipment Name (HP & AC)

Outdoor Unit

300 Seconds

(keyboard input screen = up to 35 characters in string)

ꢀ

60 Sec

ꢀ

Compressor Short Cycle Delay (HP and AC)

Compressor Shift Delay On/Off (HP only)

Defrost Termination Temp (HP only)

60 to 300 Seconds

On, Off

50ºF

50ºF to 100ºF

10ºF

table continued on next page

506920−01 09/12

Page 38

Table 3. Adjustable Parameters Table (Installer)

Parameter Name:

Default

Parameter Value Setting

Increment

Installer entry

AIR HANDLER

Equipment Name

Air Handler

(keyboard input screen)

ꢀ

Electric Heating Airflow

Low Cooling Airflow

High Cooling Airflow

5CFM

nnnn CFM

(See Note 3 at

end of table)

NOTE: CFM Default and Values Settings are depen-

dent on the tonnage of the unit

1: No Delays,

2: ON: No delays; OFF: 45 sec delay

3: ON: 82%/7.5min; OFF: No delays

4: ON: 50%/30s,82%/7.5min; OFF:50%/30s

Cooling Airflow Profile

ꢀ

Low Heating Airflow

5CFM

nnnn CFM

(See Note 3 at

end of table)

High Heating Airflow

NOTE: CFM Default and Values Settings are depen-

dent on the tonnage of the unit

Continuous Indoor Blower Airflow

Humidification Airflow

10CFM

60 to 80% (percentage of reduction of High Cooling

Airflow)

Dehumidification Airflow

70%

Delays:

Heating Indoor Blower OFF

10 sec

0 sec

2 sec

45 sec

0 sec

0 to 10 Seconds

0 to 5 Seconds

0 to 30 Seconds

0 to 10 Seconds

0 to 60 Seconds

0 to 30 Seconds

1 sec

2 sec

1 sec

5 sec

Heating Indoor Blower ON

Cooling Indoor Blower OFF

Cooling Indoor Blower ON

HP Indoor Blower OFF

HP Indoor Blower ON

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 39

Table 3. Adjustable Parameters Table (Installer)

Parameter Name

Default

Min.

Max.

Incr.

Dependency

Note

Installer entry

FURNACE

Heating indoor blower OFF delay

Heating indoor blower ON delay

Cooling indoor blower OFF delay

Cooling indoor Blower ON Delay

Heat pump indoor blower OFF delay

Heat pump indoor blower ON delay

Gas Heat Airflow Settings

DIP SW

45 sec

0 sec

180

None

DIP switch setting in

Non−comm.

45 sec fixed in Non−

Comm. IFC

Outdoor Unit

present

Not used on Non

Comm. IFC

2 sec

Outdoor Unit

present

2 sec fixed in Non−

Comm. IFC

45 sec

0 sec

Heat Pump present

Not used on Non

Comm. IFC

Heat Pump present

Not used on Non

Comm. IFC

Heating Airflow Control Type (variable

capacity furnaces only)

0 – Fixed

CFM

0 (Fixed CFM)

1 (Fixed DAT)

DATS installed

Low Heating Airflow (CFM @ min.

heat)

DIP SW

Heating Airflow

Control Type = 0

High Heating Airflow (CFM @ 100%

heat)

See furnace docu-

mentation (IOM or

engineering hand-

book) for size spe-

cific information

See furnace documen-

tation (IOM or engineer-

ing handbook) for size

specific information

Low Heating Discharge Air

Temperature (DAT @ min heat)

(variable capacity furnaces only)

DIP SW*

Heating Airflow

Control Type = 1

High Heating Discharge Air

Temperature (DAT @ 100% heat)

(variable capacity furnaces only)

* − Default DAT value is rounded to the closest number on 5 deg F resolution and limited by Minimum and Maximum value.

table continued on next page

506920−01 09/12

Page 40

Table 3. Adjustable Parameters Table (Installer)

Parameter Name

Default

Min.

Max.

Incr.

Dependency

Note

Installer entry

Cooling Airflow Settings

High Cooling Airflow (CFM @ 100%

cool)

OU tons

400CFM

Min

CFM

Max

CFM

Outdoor Unit

present

1/2 HP blower

1 HP blower

1/2 HP blower

1 HP blower

Min

CFM

Max

CFM

Low Cooling Airflow (CFM @ lowest

cool stage)

(See Note 1

at end of

table)

Min

CFM

Max

CFM

2+ stage Outdoor

Unit present

Min

CFM

Max

CFM

A:ON:50%/30s,82% /

7.5min OFF:50%/30s

B:ON:82% / 7.5min; OFF:

No delays

Airflow Profile − Cooling

DIP SW

Outdoor Unit

present

C:ON: No delays; OFF:

45sec delay

D:No delays)

Heat Pump Airflow Settings

High Heat Pump Airflow (CFM @

100%)

OU tons

400CFM

Min

CFM

Max

CFM

Heat Pump present

1/2 HP blower

1 HP blower

1/2 HP blower

1 HP blower

Min

CFM

Max

CFM

Low Heat Pump Airflow (CFM @

lowest stage)

(See Note 2

at end of

table)

Min

CFM

Max

CFM

2+ stage Heat Pump

present

Min

CFM

Max

CFM

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 41

Table 3. Adjustable Parameters Table (Installer)

Parameter Name

Other Parameters

Default

Min.

Max.

Incr.

Dependency

Note

Installer entry

Equipment Name

Furnace

N/A

None

Up to 35 characters

1/2 HP blower

Continuous Indoor Blower Airflow

DIP SW (See

Note 3 at

end of table)

Min

CFM

Max

CFM

Min

CFM

Max

CFM

1 HP blower

1/2 HP blower

1 HP blower

Humidification Airflow

Same as

above

Min

CFM

Max

CFM

Humidifier present

Min

CFM

Max

CFM

Dehumidification Airflow Percentage

140

(=70%)

120

(=60%)

160

(=80%)

(=1%)

OU present and SC

(Subnet Controller)

algorithm support

Percent of High Cooling

Airflow

Note 1:

Note 2:

Note 3:

Minimum Outdoor Unit Cooling Stage as a percentage of High Cooling Airflow (value is rounded up to the closest number on 25 CFM resolution.

Minimum Outdoor Unit Heating Stage as a percentage of High Heat Pump Airflow (value is rounded up to the closest number on 25 CFM resolution).

All communicating Installer Parameters default CFM values based on DIP switch setting (non−communicating value) are calculated using the CFM conversion

tables and rounded up to closest number on 25 CFM resolution.

Note 4:

Note 5:

Parameter dependency − Certain parameters are dependent on others and may not be shown on the display.

Default Values − Jumper/DIP switches impact the default value of some parameters.

506920−01 09/12

Page 42

Table 4. Adjustable Parameters Table (User)

Parameter Name:

Time and Date *

Default

Parameter Value Setting

(Time/date elements screen)

Enabled, Disabled

Increment

Installer entry

ꢀ

Enabled

auto

ꢀ

Daylight Saving Time *

Fan

auto, on, circulate

System Name

ꢀ

(keyboard input screen)

SERVICE INFORMATION

Dealer Number

****

Lennox

ꢀ

(keyboard input screen)

English, French, Spanish

(F) Fahrenheit, (C) Celsius

12 Hour, 24 Hour

ꢀ

20%

ꢀ

Dealer Name

Dealer Address

Dealer Phone

1−800−9−LENNOX

ꢀ

Dealer Email

Dealer Website

www.lennox.com

English

(F)

Language Displayed

Temperature Display Scale **

Clock Format

12H

Screen Lock−out

Backlight Setting

Backlight Intensity

Outdoor Temp Display

Indoor Humidity Display

Power Save

Unlocked

Always On

100%

Unlocked, Partially Locked, Fully Locked

Power Save, Always On

20 to 100%

is OFF

is OFF, is ON

is OFF

is OFF, is ON

is ON

is OFF, is ON

Background theme

cobalt

cobalt, cotton, carbon

* Entered during initial installer setup (during initial discovery); should be edited from user preferences.

** When Celsius mode is chosen, Celsius is only changed on home screen; all calculations and other setting are in Fahrenheit.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 43

Table 4. Adjustable Parameters Table (User)

Parameter Name:

Filter 1 Timer

Default

Parameter Value Setting

Increment

Installer entry

Disabled, 3 Months, 6 Months, 12 Months,

24 Months, Custom Time

Disabled

ꢀ

Disabled, 3 Months, 6 Months, 12 Months,

24 Months, Custom Time

Filter 1 Timer

ꢀ

Disabled, 3 Months, 6 Months, 12 Months,

24 Months, Custom Time

Humidifier Pad Timer

UV Bulb Timer

Disabled, 3 Months, 6 Months, 12 Months,

24 Months, Custom Time

Disabled, 3 Months, 6 Months, 12 Months,

24 Months, Custom Time

Maintenance Timer

PureAir Timer

Disabled, 3 Months, 6 Months, 12 Months,

24 Months, Custom Time

THERMOSTAT (Go to equipment button and scroll to Thermostat.)

NOTE − These settings apply to the thermostat’s internal sensors.

Equipment Name

ꢀ

(keyboard input screen)

−5ºF to 5ºF

ꢀ

1ºF

Temp Reading Calibration

Humidity Reading Calibration

0ºF

−10 to 10%

1%RH

506920−01 09/12

Page 44

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

Critical

(Stat) The thermostat has found an unknown

device on the system.

An unknown device is seen on the subnet in or outside of configuration mode. Clear by reconfiguring

the system. Press the setup tab, press start, and press confirm. If problem persists, then check all

DEVICE connections to make sure they are icomfort−compatible.

Critical

Minor

(Stat) The thermostat cannot find a previously

installed unit.

Check all connections and cycle system power. If problem persists, clear by reconfiguring the sys-

tem. Press the setup tab, press start, and press confirm. If problem persists, then check all DEVICE

connections to make sure they are icomfort−compatible.

(Stat) The thermostat cannot find an icomfort−

enabled indoor unit.

Thermostat did not find an Indoor Unit. Make sure there is an icomfort indoor unit on the system.

Check R, i+, i− and C connections, ohm wires and cycle power. Replace indoor unit control board if

there is no response.

(Stat) The thermostat found more than one ther-

mostat, more than one indoor unit, or more than

one outdoor unit on the system.

Check wiring and remove duplicate equipment. Reconfigure system.

(Stat) The outside temperature is below the lev-

el where the heat pump is programmed to heat

the home. The system will not use the heat

pump to warm your home.

Notification only − Outdoor Temp is below the Low Balance Point. Heat Pump will not be used to

service a heating demand.

Minor

(Stat) The outside temperature is higher than

the level where the furnace or electric heat is

programmed to work. The system will only use

the heat pump to warm your home.

Notification only − Outdoor Temp is above the High Balance Point. Indoor Unit (furnace or air−handler)

will not be used to service a heating demand.

Critical

Moderate

(Stat) The thermostat is reading an indoor tem-

perature that is higher than 99ºF. The thermo-

stat will not allow any heating operation to begin

until it senses a temperature lower than 99ºF.

Indoor temperature rose above 99ºF during a heating or cooling demand. Heating operation is not

allowed. Check to ensure that Heating Equipment is not stuck ON (reversing valve, etc.). Check the

accuracy of the thermostat temperature sensor. Select cooling system mode to cool the indoor

space.

(Stat) The thermostat is reading an indoor tem-

perature that is lower than 40ºF. The thermostat

will not allow any cooling operation to begin un-

til it senses a temperature higher than 40ºF.

Indoor Temp fell below 40ºF. Cooling operation is not allowed. Check to ensure that cooling equip-

ment is not stuck ON. Check accuracy of the thermostat temperature sensor. Select heating system

mode to heat the indoor space to above 40ºF.

Critical

(Stat) The thermostat has lost communication

with the (furnace, air−handler or outdoor unit) for

more than 3 minutes.

[Indicated unit] has not communicated with thermostat for more than 3 minutes. Check connections.

Ohm wires. If fault persists, then cycle power. Fault clears after communication is restored.

Moderate

(Stat) The (furnace, air−handler or outdoor unit)

is resetting itself.

[Indicated unit] is resetting itself. This event may occur during a power outage or power fluctuation in

the system. If persistent or if it coincides with the system operation then proceed with the following

steps. Check the power connections, check the amp draw at the transformer (the transformer maybe

overloaded) and check 24VAC voltage at the DEVICE. The alarm is only cleared by pressing the

clear button on the Installer Alerts Tab. If the fault persists after checking the connections, replace

the unit’s control board.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 45

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

Critical

(Stat) The thermostat does not know the capac-

ity (tonnage) of the (furnace, air−handler or out-

door unit). Please program the correct capacity

of the (furnace, air−handler or outdoor unit).

[Indicated unit] is missing the programmed unit capacity. Go to [Indicated unit] and program the unit

capacity manually. See the unit IOM for programming instructions. Remove power to thermostat

before programming the unit control board. Once programming is complete, reconnect thermostat

wires and reconfigure system.

Critical

(Stat) The system has been heating for at least

15 minutes, without a demand for heating.

Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for

other alarms/codes that may be preventing the system from operating as expected.

Step 1: Check all heating equipment to determine cause of heating demand.

Step 2: Recycle power.

System will clear code when it detects condition has cleared.

(Stat) The system has been cooling for at least

15 minutes, without a demand for cooling.

Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for

other alarms/codes that may be preventing the system from operating as expected.

Step 1: Check all cooling equipment to determine cause of cooling demand.

Step 2: Recycle power.

System will clear code when it detects condition has cleared.

(Stat) The system has not been able to turn on

the heating for more than 45 minutes. The sys-

tem will go offline for 60 minutes and try again.

Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for

other alarms/codes that may be preventing the system from operating as expected.

Step 1: Check all heating equipment to determine cause.

Step 2: Recycle power.

System will clear code when it detects condition has cleared.

(Stat) The system has not been able to turn on

the cooling for more than 45 minutes. The sys-

tem will go offline for 60 minutes and try again.

Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for

other alarms/codes that may be preventing the system from operating as expected.

Step 1: Check all cooling equipment to determine cause.

Step 2: Recycle power.

System will clear code when it detects condition has cleared.

105

(Stat / Furnace / Air Handler / Outdoor Unit) The

(stat, furnace, air−handler or outdoor unit) has

lost communication with the rest of the system.

Equipment is unable to communicate. This may indicate the existence of other alarms/codes. In

most cases errors are related to electrical noise. Make sure high voltage power is separated from

RSBus. Check for mis−wired and/or loose connections between the stat, indoor unit and outdoor unit.

Check for a high voltage source of noise close to the system. Generally, this is a self−recoverable

error.

110

111

Critical

(Furnace) The line voltage is too low.

This alarm/code may appear during a brownout. Line voltage is below its designed operating value.

Check and correct the power line voltage.

(Furnace) The line power voltage wiring is re-

versed.

The unit is reporting that its power line and neutral are reversed. Turn off the power to the system and

correct the line power voltage wiring. System resumes normal operation 5 seconds after fault recov-

ered.

112

Critical

(Furnace) The reporting device cannot find

earth ground. The thermostat will shut down the

system.

Provide proper earth ground to the equipment. System resumes normal operation 5 seconds after

fault recovered.

table continued on next page

506920−01 09/12

Page 46

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

113

Critical

(Furnace) The line voltage is too high.

Line voltage high (voltage higher than nameplate rating). Provide power voltage within proper range.

System resumes normal operation 5 seconds after fault recovered.

114

115

Critical

(Furnace / Air Handler) There is a frequency/

distortion problem with the power to the (furnace

or air−handler).

This alarm/code may indicate transformer overloading. Check the voltage and line power frequency.

Check the generator operating frequency, if the system is running on back−up power. Correct voltage

and frequency problems. System resumes normal operation 5 seconds after fault recovered.

(Furnace / Air Handler) The 24VAC to the (fur-

nace or air−handler control board) is lower than

the required range of 18 to 30VAC.

24−Volt Power Low (Range is 18 to 30 volts). Check and correct voltage. Check for additional power−

robbing equipment connected to system. This alarm/code may require the installation of an addition-

al or larger VA transformer.

117

120

Minor

(Furnace) The reporting unit has poor earth

grounding.

Provide proper grounding for the unit. Check for proper earth ground to the system. The alarm/code

will clear 30 seconds after it is corrected.

Moderate

(Stat / Furnace / Air Handler / Outdoor Unit)

There is a delay in the (stat, furnace, air−handler

or outdoor unit) responding to the system.

Typically, this alarm/code does not cause any issues and will clear on its own. The alarm/code is

usually caused by a delay in the outdoor unit responding to the thermostat. Check all wiring connec-

tions. Cleared after unresponsive device responds to any inquiry.

124

125

126

Critical

(Stat / Furnace / Air Handler / Outdoor Unit) The

thermostat has lost communication with the (fur-

nace, air−handler or outdoor unit) for more than

3 minutes.

Equipment lost communication with the thermostat. Check the wiring connections, ohm wires and

cycle power. The alarm stops all associated HVAC operations and waits for a heartbeat message

from the unit that’s not communicating. The alarm/fault clears after communication is re−established.

(Stat / Furnace / Outdoor Unit) There is a hard-

ware problem on either the (stat, furnace control

board, air−handler control board or outdoor unit

control board).

There is a control hardware problem. Replace the control if the problem prevents operation and is

persistent. The alarm/fault is cleared 300 seconds after the fault recovers.

(Furnace / Outdoor Unit) There is an internal

communication problem with the (furnace con-

trol board, air−handler control board or outdoor

unit control board).

There is an internal hardware problem on the control. Typically the control will re−set itself. Replace

the control if the problem prevents operation and is persistent. The alarm/fault is cleared 300 sec-

onds after the fault recovers.

130

131

Moderate

Critical

(Air Handler) An air−handler configuration jump-

er is missing.

Configuration jumper(s) missing on control (applicable in non−communicating applications only).

Replace the jumper or put wire between terminals on control. Cleared after jumper is connected.

(Stat / Furnace / Air Handler / Outdoor Unit) The

(stat, furnace, air−handler or outdoor unit) con-

trol parameters are corrupted.

Reconfigure the system. Replace the control if heating or cooling is not available.

132

Critical

(Air Handler) The air handler control software is

corrupted.

Recycle power. If failure re−occurs, replace the control. System reset is required to recover.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 47

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

180

Critical

(Furnace / Air Handler / Outdoor Unit) The ther-

mostat has found a problem with the (furnace,

air−handler or outdoor unit) outdoor sensor.

In normal operation after control recognizes sensors, the alarm will be sent if valid temperature

reading is lost. Compare outdoor sensor resistance to temperature/resistance charts in unit installa-

tion instructions. Replace sensor pack if necessary. At the beginning of (any) configuration, furnace

or air−handler control will detect the presence of the sensor(s). If detected (reading in range), ap-

propriate feature will be set as ’installed’ and shown in the ’About’ screen. The alarm/fault will clear

upon configuration, or sensing normal values.

200

201

Critical

(Furnace) The furnace rollout limit switch is

open.

Correct the cause of rollout trip. Reset rollout switch. Reset power to clear. Test the furnace opera-

tion. The alarm/fault clears after the furnace rollout switch is closed.

(Furnace / Air Handler) The system has lost

communication with the (furnace or air−handler)

indoor blower motor.

Lost communication with indoor blower motor. Possible causes include: power outage, brown−out,

motor not powered, loose wiring, condensation on air handler control without cover on breaker.

Problem may be on control or motor side. Cleared after communication is restored.

202

203

Critical

(Furnace / Air Handler) The unit size code for

the (furnace or air−handler) and the size of blow-

er motor do not match.

Incorrect appliance unit size code selected. Check for proper configuring under Unit Size Codes for

Furnace/Air Handler on configuration guide or in installation instructions. The alarm/fault clears after

the correct match is detected following a reset. Remove the thermostat from the system while apply-

ing power and reprogramming.

(Furnace / Air Handler) The unit size code for

the (furnace or air−handler) has not been se-

lected.

No appliance unit size code selected. Check for proper configuring under: Unit Size Codes for Fur-

nace/Air Handler on configuration guide or in installation instructions. Critical Alert. The alarm/fault

clears after the correct match is detected following a reset. Remove the thermostat from the system

while applying power and reprogramming.

204

205

206

207

223

Critical

(Furnace) There is a problem with the furnace

gas valve.

Check gas valve operation and wiring. The alarm/fault clears after the issue is corrected.

(Furnace) The furnace gas valve relay contact

is closed.

Check wiring on control and gas valve. The alarm/fault clears after the issue is corrected.

(Furnace) The furnace gas valve 2nd stage

relay is faulty.

Furnace will operate on 1st stage for the remainder of the heating demand. The alarm/fault will clear

after the issue is corrected. If unable to operate 2nd stage, replace control.

(Furnace) The furnace hot surface igniter is

open.

Measure the resistance of hot surface igniter. Replace the it if it is not within the specified range

found in IOM. The alarm/fault clears after the issue is corrected.

(Furnace) The furnace low pressure switch is

open.

Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating

pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.

The alarm/fault clears after the issue is corrected.

224

225

Critical

(Furnace) The furnace low pressure switch is

stuck closed.

Check operation of low pressure switch to see if it is stuck closed for longer than 150 seconds during

a heat call . Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for

correct operation and restriction. The alarm/fault clears after the issue is corrected.

(Furnace) The furnace high pressure switch is

failing to close.

Check pressure (inches w.c.) of high pressure switch closing during a heat call. Measure operating

pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.

The alarm/fault clears after the issue is corrected.

table continued on next page

506920−01 09/12

Page 48

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

226

Critical

(Furnace) The furnace high pressure switch is

stuck closed.

Check operation of high pressure switch closing during a heat call. Measure operating pressure

(inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. The

alarm/fault clears after the issue is corrected.

227

228

229

240

Moderate

Minor

(Furnace) The furnace low pressure switch is

open in run mode.

Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating

pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.

The alarm/fault clears after the issue is corrected.

(Furnace) The furnace control is not able to cali-

brate the pressure switch.

Unable to perform pressure switch calibration. Check vent system and pressure

switch wiring connections. Check the drain trap for blockage. The alarm/fault clears after a success-

ful calibration.

(Furnace) The furnace control has switched to

high fire ignition because the low fire pressure

switch did not close in the allowed time.

IFC switched to high fire ignition because low fire pressure switch did not close in allowed time. No

action is needed.

Moderate

(Furnace) The furnace flame current is low.

Check micro−amperes of the flame sensor using thermostat diagnostics. Clean or replace the flame

sensor. Measure voltage of neutral to ground to ensure good unit ground. The alarm clears after a

proper micro−amp reading has been sensed.

241

250

Critical

(Furnace) The furnace flame is going out while

the furnace is heating.

Shut off gas. Check for a gas valve leak. Replace the gas valve if needed. The alarm/fault will clear

when a heat call ends successfully.

Moderate

(Furnace) The furnace primary limit switch is

open.

Check for proper firing rate on furnace. Ensure there is no blockage in the furnace and the ductwork.

Check for proper air flow. If limit switch is not closed within 3 minutes, the unit will go into 1−hour

Watchguard mode. The alarm/fault will clear when a heat call ends successfully.

252

270

271

Moderate

Critical

(Furnace) The furnace discharge air−tempera-

ture is high.

Check temperature rise, air flow and input rate. Check for dirty filters. The alarm/fault will clear when

a heat call ends successfully.

(Furnace) The furnace is in Watchguard mode.

The furnace igniter cannot turn on the flame.

Check for proper gas flow. Ensure that igniter is lighting burner. Check flame sensor current. Check

for dirty filters. The alarm/fault will clear on successful ignition.

Critical

(Furnace) The furnace is in Watchguard mode.

The furnace low pressure switch is open.

Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating

pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.

The alarm/fault will clear on successful ignition.

272

273

274

Critical

(Furnace) The furnace is in Watchguard mode.

The furnace low pressure switch is open during

run mode.

Check operation of low pressure switch to see if it is stuck open during a heat call. Measure operat-

ing pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restric-

tion. The alarm/fault will clear when a heat call ends successfully.

(Furnace) The furnace is in Watchguard mode.

The furnace flame is going off during a heating

cycle.

Check micro−amperes of flame sensor using thermostat diagnostics. Clean or replace sensor. Mea-

sure voltage of neutral to ground to ensure good unit ground. The alarm/fault will clear when a heat

call ends successfully.

(Furnace) The furnace limit switch has been

open for more than 3 minutes.

The system will go into Watchguard mode. Check firing rate and air flow. Check for blockage. The

alarm/fault will clear when a heat call ends successfully.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 49

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

275

Critical

(Furnace) The furnace flame is out of sequence.

The system will go into Watchguard mode. Shut off gas. Check for gas valve leak. The alarm/fault

will clear on next successful ignition.

276

Critical

(Furnace) The furnace is not able to calibrate or

the high pressure switch opened or failed to

close in run mode.

The system will go into Watchguard mode. Check vent system and pressure

switch wiring connections. The fault/alarm will clear when the furnace calibrates itself successfully.

290

291

292

Critical

(Furnace) There is a problem with the furnace

ignition circuit.

The system will go into Watchguard mode. Measure resistance of hot surface igniter. Replace the hot

surface ignitor it is not within specifications. The alarm/fault will clear on next successful ignition.

(Furnace) The heating airflow is below the mini-

mum required level.

The system will go into Watchguard mode. Check for dirty filters and other air flow restrictions. Check

blower performance. The alarm/fault will clear when a heat call ends successfully.

(Furnace / Air Handler) The (furnace or air−han-

dler) indoor blower motor will not start.

The system will go into Watchguard mode. Indoor blower motor unable to start. This could be due to

seized bearing, stuck wheel, obstruction etc. Replace motor or wheel if assembly does not operate or

meet performance standards. The alarm/fault clears after the indoor blower motor starts successfully.

294

Critical

(Furnace) There is over current in the furnace

inducer motor.

The system will go into Watchguard mode. Check combustion blower bearings, wiring and amps.

Replace if does not operate or does not meet performance standards. The alarm/fault clears after

inducer current is sensed to be in−range after the ignition following the Watchguard mode or reset.

295

310

Minor

(Furnace) The indoor blower motor is over heat-

ing.

Indoor blower motor over temperature (motor tripped on internal protector). Check motor bearings

and amps. Replace if necessary. The alarm/fault clears after blower demand is satisfied.

Critical

(Furnace / Air Handler) There is a problem with

(furnace or air−handler) discharge air sensor.

Compare outdoor sensor resistance to temperature/resistance charts in installation instructions.

Replace sensor if necessary. The alarm/fault is cleared 30 seconds after fault is detected as recov-

ered.

311

312

Minor

(Furnace) The heat firing rate has been reduced

to match available airflow (cutback mode).

Warning Only. Furnace blower in cutback mode due to restricted airflow. Reduce firing rate every 60

seconds to match available CFM. Check filter and duct system. To clear, replace filter if needed or

repair/add duct. 2−stage controls will reduce firing rate to 1st stage. The alarm/fault clears when a

heat call finishes successfully.

(Furnace / Air Handler) The blower cannot pro-

vide the requested CFM due to high static.

Warning Only. Restricted airflow − Indoor blower is running at a reduced CFM (Cutback Mode − The

variable speed motor has pre−set speed and torque limiters to protect the motor from damage caused

by operating outside of design parameters (0 to 0.8" e.g.. total external static pressure). Check filter

and duct system. To clear, replace filter if needed or repair/add duct. The alarm/fault is cleared after

the current service demand is satisfied.

313

344

Minor

(Furnace / Air Handler) The indoor and outdoor

unit capacities do not match.

Check for proper configuring in installation instructions. Alarm is just a warning. The system will

operate, but might not meet efficiency and capacity parameters. The alarm will clear after commis-

sioning is complete.

Critical

(Furnace) Relay Y1 Failure

Y1 relay failed; operation stopped. Alarm clears 300 seconds after Y1 input sensed OFF.

table continued on next page

506920−01 09/12

Page 50

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

345

Critical

(Air Handler) The ꢁO" relay on the air−handler

has failed. Either the pilot relay contacts did not

close or the relay coil did not energize.

O relay / Stage 1 failed. Pilot relay contacts did not close or the relay coil did not energize. Replace

control. Cleared after the fault recovered following reset.

346

347

Critical

(Air Handler) The heat pump jumper was not

removed on the air−handler control board.

Configuration link(s) not removed on control. Cut O−R. Applicable with non communicating outdoor

unit with communicating indoor system.

(Furnace / Air Handler) The ꢁY1" relay on the

(furnace or air−handler) has failed. Either the

pilot relay contacts did not close or the relay

coil did not energize.

Operation stopped. Y1 relay / Stage 1 failed. (Pilot relay contacts did not close or

the relay coil did not energize; no input back to IFC chip). Critical Alert. Cleared after reset and Y1

input sensed.

348

Critical

(Furnace / Air Handler) The ꢁY2" relay on the

(furnace or air−handler) has failed. Either the

pilot relay contacts did not close or the relay

coil did not energize.

Y2 relay / Stage 2 failed. (Pilot relay contacts did not close or the relay coil did not energize; no input

back to IFC chip). Critical Alert. Cleared after reset and Y1 input sensed.

349

350

Critical

(Furnace) The ꢁO" to ꢁR" jumper on the furnace

needs to be restored.

Configuration link R to O needs to be restored. Replace link or hard−wire. Applicable in non commu-

nicating mode. Critical Alert.

(Air Handler) The air−handler’s electric heat is

not configured.

Heat call with no configured or mis−configured electric heat. Check for proper configuring under

Configuring Electric Heat Stages in the air handler installation instructions. Cleared after electrical

heat detection is successful.

351

352

Critical

(Air Handler) There is a problem with the air−

handler’s 1st stage electric heat. Either the pilot

relay contacts did not close, or the relay coil in

the electric heat section did not energize.

Heat section / Stage 1 failed. (Pilot relay contacts did not close, or the relay coil in the electric heat

section did not energize.) Air handler will operate on 1st stage for reminder of the heat call. Will clear

after fault recovered.

(Air Handler) There is a problem with the air−

handler’s 2nd stage electric heat. Either the pi-

lot relay contacts did not close, or the relay coil

in the electric heat section did not energize. The

air−handler will operate on 1st stage electric

heat until the issue is resolved.

Heat section / Stage 2 failed (Same as Code 351).

Heat section / Stage 3 failed (Same as Code 351).

table continued on next page

353

Critical

(Air Handler) There is a problem with the air−

handler’s 3rd stage electric heat. Either the pilot

relay contacts did not close, or the relay coil in

the electric heat section did not energize. The

air−handler will operate on 1st stage electric

heat until the issue is resolved.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 51

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

354

Critical

(Air Handler) There is a problem with the air−

handler’s 4th stage electric heat. Either the pilot

relay contacts did not close, or the relay coil in

the electric heat section did not energize. The

air−handler will operate on 1st stage electric

heat until the issue is resolved.

Heat section / Stage 4 failed (Same as Code 351).

355

Critical

(Air Handler) There is a problem with the air−

handler’s 5th stage electric heat. Either the pilot

relay contacts did not close, or the relay coil in

the electric heat section did not energize. The

air−handler will operate on 1st stage electric

heat until the issue is resolved.

Heat section / Stage 5 failed (Same as Code 351).

370

400

401

Critical

(Furnace) The furnace control board has not

received 24VAC power for 2 minutes or more.

Control sees the loss of 24VAC for 2 minutes .Terminate all services and wait for interlock switch to

close. The alarm will clear when 24VAC is continuously sensed on DS terminal for a minimum of 10

seconds or on a power reset. If 2 stage with float switch, the IFC control R−DS is open.

Critical

(Outdoor Unit) The compressor internal over-

load has tripped.

Thermostat demand Y1 is present; but, compressor is not running. Check power to unit. Clears the

error after current is sensed in both RUN and START sensors for at least 2 seconds, or after service

is removed, or after power reset.

Moderate

(Outdoor Unit) Either the compressor ran for

more than 18 hours continuously trying to cool

the home or the refrigerant pressure in the sys-

tem is low.

Compressor ran more than 18 hours to satisfy a single thermostat demand. Will not lockout system.

if 2 stage, units with blinking LED light controls, unit will run in low speed; units with 7−segment

display will display code, but continue to run in high speed. If a Heat Pump, and if outdoor temp is

less than 65 degrees, code is ignored. Clears the error after 30 consecutive normal run cycles or

power reset. Also monitors low pressure switch trips.

402

Critical

(Outdoor Unit) Either the discharge or suction

pressure level is out−of−limits, or the is compres-

sor overloaded.

Discharge or suction pressure out−of−limits, or compressor overloaded. Clears the error after 4 con-

secutive normal compressor run cycles.

403

404

Moderate

Critical

(Outdoor Unit) The compressor ran for less than

3 minutes to satisfy a thermostat demand.

Compressor runs less than 3 minutes to satisfy a thermostat demand. Clears the

error after 4 consecutive normal run cycles or power reset.

(Outdoor Unit) The compressor rotor is locked

up. This could be due to a short circuiting of the

run capacitor, seizing of the bearings or exces-

sive liquid refrigerant etc.

Compressor rotor locked up due to run capacitor short, bearings are seized, excessive liquid refriger-

ant, etc. (NOTE: May need to install hard start kit). Clears the error after 4 consecutive normal run

cycles or after power reset.

405

406

Critical

(Outdoor Unit) The compressor circuit is open.

This could be due to a power disconnection,

open fuse etc.

Compressor circuit open (due to power disconnection, open fuse, etc.) Clears the

error after 1 normal compressor run cycle.

(Outdoor Unit) The required amount of current is

not passing through the start current transform-

er.

Required amount of current is not passing through Start current transformer. Clears the error after

current is sensed in START sensor, or after power reset.

table continued on next page

506920−01 09/12

Page 52

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

407

Critical

(Outdoor Unit) The required amount of current is

not passing through run current transformer.

Required amount of current is not passing through Run current transformer. Clears the error after

current is sensed in RUN sensor, or 1 normal compressor run cycle, or after power reset

408

409

Critical

(Outdoor Unit) The compressor is running con-

tinuously.

Compressor runs continuously. Clears the error after 1 normal compressor run

cycle or after power reset.

Moderate

(Furnace / Air Handler / Outdoor Unit) The sec-

ondary voltage for the (furnace, air−handler or

outdoor unit) has fallen below 18VAC. If this

continues for 10 minutes, the thermostat will

turn off the (furnace, air−handler or outdoor unit).

Secondary voltage is below 18VAC. After 10 minutes, operation is discontinued.

Clears the code after voltage is higher than 20 VAC for 2 seconds or after power

reset.

410

411

Moderate

Critical

(Outdoor Unit) The outdoor unit pressure is be-

low the required limit.

Unit pressures are below the lower limit. Pressure switch opens at 40 psig (system shuts down) and

closes at 90 psig (system restarts).

(Outdoor Unit) The low pressure switch has

opened 5 times during one cooling cycle. As a

result, the thermostat has shutdown the outdoor

unit.

Open low pressure switch error count reached 5 strikes. Check system charge using approach and

sub cooling temperatures. Reset by putting outdoor unit control in test mode or resetting low voltage

power.

412

413

Moderate

Critical

(Outdoor Unit) The outdoor unit pressure is

above the required limit. The system will shut

down.

Unit pressure is above the upper limit. Pressure switch opens at 590 psig (system shuts down) and

closes at 418 psig (system restarts).

(Outdoor Unit) The high pressure switch has

opened 5 times during one cooling cycle. As a

result, the thermostat has shutdown the outdoor

unit.

Open high pressure switch error count reached 5 strikes. Check system charge

using approach and sub cooling temperatures. Check outdoor fan operation. Check for dirt or debris

blocking air flow to outdoor unit. Reset by putting outdoor unit control in test mode or resetting low

voltage power.

414

415

416

Critical

(Outdoor Unit) The discharge line temperature

is higher than the recommended upper limit of

279ºF.

Discharge line temperature is > 279ºF. Make sure coil is clean and airflow unobstructed in and out of

condenser. Check system operating pressures and compare to unit charging charts in installation

manual. Clears after discharge temperature is < 225ºF.

(Outdoor Unit) The discharge line temperature

has been consistently higher than the recom-

mended upper limit of 279ºF.

Discharge line high temperature error count reached 5 strikes. Make sure coil is clean and airflow

unobstructed in and out of condenser. Check system charge using approach and sub cooling tem-

peratures. Reset by putting outdoor board in test mode or resetting low voltage power.

(Outdoor Unit) The outdoor coil sensor is either

open, short−circuited or the temperature is out of

sensor range. As a result the outdoor unit con-

trol will not perform any defrost tempering.

Sensor being detected open or shorted, or temperature is out of sensor range.

Outdoor unit control will not perform demand or time/temperature defrost operation. (System will still

heat or cool.) Clears when outdoor unit control detects proper sensor readings.

417

Critical

(Outdoor Unit) The outdoor unit sensor is either

open, short−circuited or the temperature is out of

sensor range. As a result the outdoor unit con-

trol will not perform any defrost tempering.

Outdoor unit control detects open or shorted sensor, or temperature that is out of sensor range.

Critical Alert after 10 minutes. Reset by replacing sensor. This fault is detected by allowing the unit to

run for 90 seconds before checking sensor resistance. If the sensor resistance is not within range

after 90 seconds, the board will count one fault. After 5 faults, the board will lock out. Check for

proper sensor reading and attachment to line. Replace if out−of−specifications.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 53

Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer

alert button. Minor and Moderate alerts are found only in the Installer alert button.

Table 5. Alert Codes and Troubleshooting

Alert

Code

Priority

Alert Text

Steps to clear

418

Moderate

(Outdoor Unit) There is a faulty ꢁW" output cir-

cuit.

Faulty W output circuit.

419

420

Critical

(Outdoor Unit) The ꢁW" output on the outdoor

unit has reported more than 5 errors. As a re-

sult, the system has shutdown the outdoor unit.

W output hardware fault count reached 5 strikes.

(Air Handler) The heat pump defrost cycle has

taken more than 20 minutes to complete.

Defrost cycle lasts longer than 20 minutes. Check heat pump operation. Cleared

when W1 signal is removed. Applicable only in communicating mode with non−communicating heat

pump.

421

700

701

702

703

704

705

Critical

(Outdoor Unit) The ꢁW" output terminal on the

outdoor unit is not wired correctly.

Voltage sensed on W output terminal when Y1 out is deactivated.

Moderate

(Stat) The temperature sensor in the thermostat

is not working properly.

Recalibrate thermostat to clear. Replace thermostat if needed.

(Stat) The thermostat is reading indoor tempera-

tures above the pre−programmed limit.

Recalibrate thermostat to clear; cool thermostat; adjust setpoint. Replace thermostat, if needed.

Recalibrate thermostat to clear; warm thermostat; adjust setpoint. Replace thermostat, if needed.

Recalibrate thermostat to clear; adjust setpoint. Replace thermostat, if needed.

Recalibrate thermostat to clear. Replace thermostat, if needed.

(Stat) The thermostat is reading indoor tempera-

tures below the pre−programmed limit.

(Stat) The humidity sensor in the thermostat is

not working properly.

(Stat) The thermostat is reading indoor humidity

levels above the pre−programmed limit.

(Stat) The thermostat is reading indoor humidity

levels below the pre−programmed limit.

Recalibrate thermostat to clear. Replace thermostat, if needed.

Ohm reading between i+ and i− anywhere on the RSBus with supply power off should be between 70

and 90 ohms. If above 90 ohms, check and repair wiring, splices or other wiring defects that may be

causing the excessive resistance. If less than 70 ohms, check for shorted wires.

Ohm

Check

The ohm reading in the system is either too

high or too low.

ꢀ

Homeowner Service Alert Codes8

Number

3000

Value

Number

3002

Value

Number

3004

Value

Number

Value

Number

Value

Filter 1

Filter 2

Humidifier Pad

UV Light

Maintenance

4000

User WiFi state change, disable

Firmware download failed

4002

Image file download failed

3001

3003

3005

PureAir Maintenance 4001

506920−01 09/12

Page 54

Bold text indicates a button, or text display on the thermostat.

Table 6. Troubleshooting Tips

No.

Issue / Problem

Possible Cause

Corrective Action / Comments

− No electric heat operation.

− The thermostat system setting

does not offer a emerg. heat choice

on an HP system.

− The thermostat does not offer any

ꢁheat" choice on an AC system with

air handler with electric heat.

Electric heat was not manually

configured configured at the Air

Handler Control (AHC) before the

icomfort Wi-Fiꢁ system discov-

ery process at initial power−up.

− Manually configure to discover the electric heat section(s) on the air

handling (see Page 64 or CBX32MV or CBX40UHV manual for de-

tails).

− Re−setup the icomfort system by selecting the setup button in the

Installer program and press start to begin system discovery; then

reconfigure the system.

Thermostat Displays System Wait-

ing message and the furnace does

respond to a heating demand (no red

critical alert icon or alert messages

are displayed on the thermostat).

The furnace is in ꢁwatchguard"

mode (moderate alert) and will

not display the red critical alert

icon nor be displayed in the

homeowner alert button.

− Go to the installer program alert button to view all alerts and details

about those alerts.

− If the furnace is in ꢁwatchguard" mode, the furnace can be reset from

the Home screen by setting the thermostat system settings to off

for 20 sec, then back to heat. Then initiate a new heat demand.

Outdoor temperature is not displayed

on the thermostat.

Outdoor Temp Display must be

enabled to display the outdoor

temperature on the home screen.

On the home screen, press the right arrow

then press the display settings button. Click on outdoor temp dis-

play button to toggle ON.

A humidifier was added to the system

as non−communicating equipment

and the thermostat does not provide

the ability to adjust the RH setpoint.

Humidification Control Mode is

set for ꢁDisplay only" which will

not allow the icomfort system to

control the humidifier.

− In the installer program, select the equipment button. Select ꢁSys-

tem" from the device list using the up/down arrows and press the edit

button. Use up/down arrows to select Humidification Control Mode

from the list. Select the desired humidifier control mode: Basic, Preci-

sion, or Dew Point. (Basic is the most popular) and press the save

button. Follow the red instructions then exit the system.

− If Humidification Control Mode is not offered as a menu item

choice, the Humidifier must be added to the icomfort system using

the Add or Remove Non−communicating equipment screen under

the thermostat installer program in the setup button.

The non−communicating outdoor unit

is part of the system, but the thermo-

stat does not display the outdoor unit.

The outdoor unit was not added

as a non−communicating unit dur-

ing initial system setup.

In the thermostat installer program select the setup button and follow

the on screen instructions until you reach the Add or Remove Non−

communicating equipment screen; press yes. Select Outdoor Unit

Type from the menu and press the edit button. Select 1 Stage AC Unit

or 2 Stage AC Unit and press save. Follow the red instructions then

exit the system.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 55

Bold text indicates a button, or text display on the thermostat.

Table 6. Troubleshooting Tips

No.

Issue / Problem

Possible Cause

Corrective Action / Comments

High Balance Point and Low Bal-

ance Point are not listed as a menu

item to adjust the setpoint on the ther-

mostat of the heat pump system.

Balance Point Control must be

enabled to display as the High

Balance Point and Low Bal-

ance Point in the menu and pro-

vide the ability for the installer to

adjust the setpoint.

− In the installer program select the equipment button, then scroll

down to system device to System and press edit. Scroll down the

menu item choices to Balance Point Control and press edit. Select

enable and press save. High Balance Point and Low Balance

Point are now listed; adjust the balance point settings and press

save.

− If Balance Point Control is not shown as a menu item choice, the

system is not connected to Wi−Fi or does not have/recognize an

outdoor sensor or the system is not a heat pump.

icomfort thermostat does not show a

choice for Dew Point Control Hu-

midification mode (only Basic and

Precision choices).

Dew Point Control will only be

displayed if the system has an

outdoor sensor.

− Add an outdoor sensor to the system and connect to the outdoor

sensor terminals on the indoor unit.

− icomfort system is not able to read the outdoor temperature sensor in

the icomfort outdoor unit, check outdoor sensor.

The icomfort does not display an alert

code message, but the furnace or unit

control displays a diagnostic code.

The red Critical Alert icon and

homeowner alert button do not

display non−critical alerts.

Go to the installer program alert button to view all alerts and details

about those alerts.

The icomfort thermostat does not dis-

play the Model # and or Serial # in-

door or outdoor unit.

The icomfort control was re-

placed with a replacement control

before the icomfort system was

initially setup or configured.

− Replacement icomfort controls do not have the Model # or Serial #

loaded in the control.

− The Model # and Serial # cannot be added to the control.

− System will still operate normally.

A non−communicating 2−stage out-

door unit was added to the system

but the unit only runs in 2nd stage.

The ꢁW915 2 Stage Compr" clip-

pable option link on the furnace

or air handler control must be cut

when used with a non−communi-

cating 2−stage outdoor unit.

Cut the ꢁW915 2 Stage Compr" option link on the furnace or air handler

control.

Transfer the Model #, Serial # and

system settings to a replacement

control.

The icomfort system is capable

of copying settings from the pre-

vious configuration to the new

compatible device (control)

found.

Reconfigure the system using the installer program and select the

setup button. The system will go through the system discovery pro-

cess. The thermostat will display missing devices (old control) and

found compatible devices (new control). Press the next button to

accept the new device and copy the settings. Thermostat will display

Settings were copied after successfully copying the information to the

new control. See section title ꢁReconfiguring a system" in this manual.

table continued on next page

506920−01 09/12

Page 56

Bold text indicates a button, or text display on the thermostat.

Table 6. Troubleshooting Tips

No.

Issue / Problem

Possible Cause

Corrective Action / Comments

Determine the actual Software ver-

sion of the thermostat or one of the

icomfort unit controls.

icomfort software is stored in the

control and can be retrieved.

From the home screen click the right arrow

then click service info button; then click the thermostat info button;

(display shows model & serial numbers and hardware, software, Wi−Fi

revision information).

The icomfort thermostat shows an er-

ror code related to the outdoor sensor

and or the DAS even after removing

these optional accessories.

The outdoor sensor and dis-

charge sensor are options, how-

ever if the system was setup with

the sensor in place, the icomfort

system will see an open sensor

reading if it is disconnected.

− Disconnect the outdoor sensor or discharge sensor.

− Using the installer program, reset the system by selecting setup

button and follow the screen prompts as the thermostat goes through

a new system discovery.

The icomfort thermostat will not pro-

vide me a choice to add a non−com-

municating heat pump to a gas fur-

nace.

The icomfort system does not

have the ability to control a non−

communicating heat pump on a

dual fuel system.

Replace the icomfort thermostat with a conventional thermostat that

has a dual fuel control mode (e.g. Lennox ComfortSenseꢁ 7000).

During system discovery, the ther-

mostat displays a message Thermo-

stat is unable to communicate to

system components.

The thermostat was not success-

ful in communicating to the indoor

unit.

− Verify the indoor unit has a icomfort communicating control.

− Check wiring connections at R, i+, i− and C at the indoor unit and

thermostats.

− Check R, i+. I− , C wires for open/shorts.

Temperature or humidity calibration

does not respond to calibration

changes.

Temperature/Humidity calibration

changes will change display 1ºF

or 1% RH every 3 minutes.

Allow the system to stabilize and complete the calibration mode due to

the time delay. A 5ºF calibration change will take 15 minutes to calibrate

the display.

The installer adjustable settings used

to configure the system are not listed

in the equipment button under the

Thermostat 49W95 (only Temp

Reading Calibration and Humidity

Reading Calibration are listed as

menu items).

The adjustable system configura-

tion settings are listed in the

equipment button under Sys-

tem.

− In the installer program select the equipment button and choose

System from system device and press edit.

− Over 25 installer adjustable settings are provided including balance

point, humidification control, dehumidification modes, stage differen-

tials and delays.

table continued on next page

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 57

Bold text indicates a button, or text display on the thermostat.

Table 6. Troubleshooting Tips

No.

Issue / Problem

Possible Cause

Corrective Action / Comments

During the cooling mode the dis-

played air volume on the indoor con-

trol is substantially lower than ex-

pected.

The system may be following ꢁthe

cooling ramping" profile or may

be in ꢁthe dehumidification

mode".

− During the default cooling ramping profile the blower will run for 7.5

minutes at 82% of the cooling air volume. If the ꢁcooling ramping

profile" is selected, the system will ramp to 100% after 7.5 minutes.

− The dehumidification mode will run the system at 70% of the cooling

air volume which will be in addition to the air volume reduction pro-

vided during the ramping profile. During the dehumidification mode, a

ꢁd" will be displayed on the furnace or air handler control.

The Indoor unit is not providing the

expected air volume according to the

cfm shown on the indoor unit control.

− Indoor unit air volume settings

in the icomfort thermostat are

not correct.

− System is operating in the cool-

ing mode and following the

cooling ramping profile or dehu-

midification air volume.

− In the installer program select the equipment button and choose the

furnace or air handler from the system devices list and press edit.

Verify/set the correct air volume for heating and cooling modes.

− If in the cooling mode check for cooling ramp mode or dehumidifica-

tion mode as in #18.

− No second stage cooling is pro-

vided on a icomfort outdoor unit.

− Space temperature is above second

stage differential and has run in first

stage a long time.

The red Critical Alert icon and

homeowner alert button do not

display non−critical alerts.

− Go to the installer program alert button to view all alerts and details

about those alerts.

− Look for alert code 401 (Compressor Long On Cycle) which indicates

compressor ran more than 18 hours continuous and will lock out 2nd

stage compressor.

− No red Critical Alert icon or alert is

displayed in the homeowner alert

button.

− Cycle indoor power off and back on, alert code 401 will clear within a

few minutes.

No weather being displayed.

icomfort Wi-Fiꢁ not communicat-

ing with router.

Make sure Wi−Fi is enabled (see Page 24).

Unable to complete Wi−Fi router / in-

ternet connection

Refer to 507037−01 Wi−Fi Troubleshooting checklist for icomfort Wi−Fit thermostat.

506920−01 09/12

Page 58

Wiring Diagrams

icomfortꢀ Communicating System Wiring

icomfort by Lennoxꢁ

FURNACE (IFC) OR AIR HANDLER (AHC)

DAS NOTE − The discharge air sensor is

intended to be mounted downstream of the

furnace heat exchanger and air conditioning

coil. It must be placed in free airflow, where

other accessories (such as humidifiers, UV

lights, etc.) will not interfere with its accura-

cy. Wiring distance between the IFC or AHC

OPTIONAL DIS-

CHARGE AIR SEN-

SOR (SEE DAS

NOTE)

OPTIONAL OUT-

DOOR AIR SENSOR

(SEE OAS NOTE)

and the discharge air sensor should not ex-

ceed 10ft when wired with 18−gauge ther-

mostat wire.

OAS NOTE − Wiring distance between the

IFC or AHC and the outdoor temperature

sensor should not exceed 200ft when wired

with 18−gauge thermostat wire.

icomfort Wi-Fiꢁ

THERMOSTAT

icomfort by Lennoxꢁ

OUTDOOR AIR CON-

DITIONING OR HEAT

PUMP UNIT

RSBus

icomfort Wi-Fiꢁ Thermostat

icomfort by Lennoxꢁ Indoor Furnace or Air Handler

Maximum total length of all connections on

the RSBus is limited to 1500ft.

icomfort by Lennoxꢁ Outdoor Condensing Unit or Heat Pump

Wire gauge of RSBus wire is 18.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 59

Wiring Diagrams

icomfortꢀ Communicating Indoor/non−Communicating Outdoor System Wiring

icomfort by Lennoxꢁ AIR HANDLER (AHC)

icomfort by Lennoxꢁ FURNACE (IFC) OR AIR HANDLER (AHC)

OPTIONAL DIS-

CHARGE AIR SEN-

SOR (SEE DAS

NOTE Page 59)

OPTIONAL DIS-

CHARGE AIR SEN-

SOR (SEE DAS

NOTE Page 59)

OPTIONAL OUT-

DOOR AIR SENSOR

(SEE OAS NOTE

Page 59)

OPTIONAL OUT-

DOOR AIR SENSOR

(SEE OAS NOTE

Page 59)

icomfort Wi-Fiꢁ

THERMOSTAT

Setup Notes:

icomfort Wi-Fiꢁ

THERMOSTAT

Cut Y1−Y2 Onboard Link

For 2−stage Outdoor

Units

Cut R−O Onboard Link

For Outdoor Heat Pump

Units

RSBus

Maximum total

length of all connec-

tions on the RSBus

is limited to 1500ft.

Maximum total

length of all connec-

tions on the RSBus

is limited to 1500ft.

STANDARD

OUTDOOR AIR

CONDITIONING

UNIT − 1 OR 2

STAGE

STANDARD

OUTDOOR HEAT

PUMP UNIT − 1

OR 2 STAGE

Wire gauge of

RSBus wire is 18.

Wire gauge of

RSBus wire is 18.

icomfort Wi-Fiꢁ

Thermostat

Setup Note:

icomfort by Lennoxꢁ Air

Handler

Cut Y1−Y2 Onboard

Link For 2−stage

Outdoor Units

Standard Outdoor Heat

Pump

icomfort Wi-Fiꢁ Thermostat

icomfort by Lennoxꢁ Indoor Furnace or Air Handler

Standard Outdoor Condensing Unit

506920−01 09/12

Page 60

Optional Accessories Wiring

for use with any icomfort by Lennoxꢀ system

NOTE: icomfort Wi-Fiꢁ THERMOSTAT SENSES HUMIDITY & CONTROLS 24V ꢁH" OUTPUT (& 120V ꢁH" OUT-

PUT) TO CYCLE HUMIDIFIER BASED ON DEMAND. NO OTHER CONTROL OR HUMIDISTAT REQUIRED.

icomfort by Lennoxꢁ

SLP98 & G71MPP FURNACE

(IFC) OR AIR HANDLER (AHC)

OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIFIER (IF NOT ALREADY IN THE SYSTEM FOR

OTHER FUNCTIONS. BUILT INTO ALL icomfort by Lennoxꢁ OUTDOOR UNITS). (SEE OAS NOTE Page 59)

DISCHARGE AIR SEN-

SOR (REQUIRED FOR

EVEN HEAT) (SEE DAS

NOTE Page 59)

HCWH−01

For SL290 & EL296, see HUMIDIFIER diagram

DEHUMIDIFIER CONTROL

below (bottom right)

icomfort Wi-Fiꢁ

THERMOSTAT

HVAC

EQUIPMENT

RSBus

AUXILIARY DEHUMIDIFIER 090 & 135

capacities only (065 not compatible)

Maximum total

icomfort by Lennoxꢁ SL280, EL296 FURNACE

length of all connec-

tions on the RSBus

is limited to 1500ft.

icomfort

Wi-Fiꢁ

thermostat

Wire gauge of

RSBus wire is 18.

NOTE: 24V UV LIGHT

APPLICATIONS

icomfortꢁ

enabled

outdoor unit

In an icomfort by Lennoxꢁ

system, neither furnace nor

air handler transformer will

have adequate VA to power

24V UV light applications.

An additional transformer for

UV light applications is re-

quired. UV light wiring con-

nections are independent of

HVAC system operation; see

UV light installation instruc-

tions.

48G96 Relay

GND

120VAC<−−−−−−−HUMIDIFIER CONNECTIONS−−−−−−> 24VAC

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 61

Optional Accessories Wiring

for use with any icomfort by Lennoxꢀ system

icomfort by Lennoxꢁ

2−STAGE FURNACE

icomfort by Lennoxꢁ

SLP98 & G71MPP FURNACE

(IFC) OR AIR HANDLER (AHC)

LVCS Ventilation Control System

icomfort by

Lennoxꢁ

Furnace or

Air Handler

icomfort by

Lennoxꢁ

Outdoor Air

Conditioning

or Heat Pump

CUT

R−DS

W914

icomfort Wi-Fiꢁ

Thermostat

(POWER COMPANY INTERRUPTION

SYSTEMS ARE WIRED SAME AS

OVERFLOW SWITCH)

RSBus

Standard 1

or 2 stage

AC or HP

unit

icomfort by Lennoxꢁ

Furnace or Air Handler

HEPA Bypass Filter X2680 HEPA Interlock Kit

26L56 Currrent sensing relay kit.

Pass indoor

blower motor

common wire

through cur-

rent loop.

NOTE: Pass the blower motor L1 wire through the current loop

on the current sensing relay as shown.

HVAC Heat or Cool call, or the fan is in continuous operation, the ventilation controller will open

OA damper to ventilate if the outdoor temperature and indoor humidity are within the limits of the

ventilation controller.

See HEPA In-

terlock Kit for

installation

details

icomfort by Lennoxꢁ

Furnace or Air Handler

LVCS. Set cycle time to 1 hour; set ventilation time to 60 minutes.

NOTE: Use the icomfortꢁ circulate fan percentage of ON* TIME to control ventilation time.

506920−01 09/12

Page 62

Thermostat wire termination in communicating system

Outdoor Unit

Indoor Unit

Controller

icomfort Wi-Fiꢁ

thermostat

Single wire to

terminal C

Single wire to

terminal C

Unused wires

Communicating systems using the icomfort Wi-Fiꢁ thermostat require four

thermostat wires between the thermostat and the furnace/air handler control

and four wires between the outdoor unit and the furnace/air handler control.

When a thermostat cable with more than four wires is used, the extra wires

must be properly connected to avoid electrical noise. The wires must not be

left disconnected.

Use wire nuts to bundle the unused wires at each end of the cable. A single

wire should then be connected to the indoor unit end of the wire bundle and

attached to the ꢁC" terminals as shown in the diagram above.

This is not an issue in non−communicating systems.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 63

Configuring heat strips on Air Handler Control (AHC)

IMPORTANT: After electric heat strips are installed, the Air Handler Control

(AHC) must be manually configured to detect the number of electric heat

sections. (SEE ALSO 506181−01 for complete configuration guide.)

FUSE 3 AMP

HEAT

HUMIDITROL

3 4

XFMR 24V

HUMIDIFICATION

COOL

To configure the heat strips so that they will be detected by the thermostat:

24 VAC

COM

AUTO

SMART

ꢂ

Power must be applied to the air handler but NOT to the thermostat.

Remove thermostat from baseplate or remove wires to thermostat at

the air handler.

EVENHEAT

DELAY

3 4

ꢂ

On the air handler control (AHC), unit should be in idle mode (decimal

blinks at 1 Hertzꢀ0.5 second ON, 0.5 second OFF.

BLOWER

ONLY CFM

ADJUST

NORM

−

Select field test modeꢀpress and hold the pushbutton until solid ꢁ–"

appears; release button. Display will blink.

2 3 4

Press the pushbutton and wait for the display LED to show ꢁH" (capital

H), then release the button.

XFMR LINE

The AHC cycles the indoor blower motor ꢁon" to the selected heat

speed and stages the electric heat relays ꢁon" and ꢁoff" to automatically

detect the number of electric heat sections. The AHC stores the num-

ber of electric heat sections, then automatically exits ꢁField Test

Mode".

A92

INTEGRATED

CONTROL

INDOOR

BLOWER

POWER

L2 L1

EARTH

INDOOR BLOWER

SIGNAL

ꢂ

At this point, the icomfortWi-Fiꢁ will now detect the heat strip informa-

tion stored in the AHC.

I + I −

OUTDOOR

AIR SENSOR AIR SENSOR

DISCHARGE

I + I −

OUTDOOR UNIT

I + I −

LINK

THERMOSTAT

PUSHBUTTON

LED

506920−01 09/12

Page 64

Setting up typical systemsꢁFURNACE & AIR CONDITIONING UNIT

icomfortꢀ−enabled furnace & icomfortꢀ−enabled air conditioner

An icomfort−enabled gas furnace (G71MPP, EL296V, SLP98, SL280) with

an icomfort−enabled AC (XC17 or XC21 only) unit.

save either way. The red settings will go away after pressing save.

When all CFM settings are complete, press the back button. Press

next step to advance to the tests button.

1. WiringꢀSee Communicating System Wiring diagram on Page 59

and Optional Accessories Wiring (Page 61) for any accessories be-

ing installed with the system.

6. Using up/down arrows, select the test options individually (if so de-

sired, you may choose to TEST ALL) and press the select button. (If

selecting individual tests, repeat until you have selected all you intend

to run.)

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the gas furnace (R, i+, i−, C)

4−conductor thermostat wire from the integrated furnace control

(IFC) terminal strip to the icomfort−enabled AC unit (R, i+, i−, C)

Wiring as required for accessories

7. Press the start button. Confirm the AC unit is electrically energized and

operational. Press done.

8. Exit the installer setup mode by selecting the EXIT button.

2. DO NOT cut any option link on air handler control.

TIPS

ꢂ

3. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

An outdoor temperature sensor is provided in an icomfort−enabled air

conditioning unit. To display the outdoor temperature on the home

screen of the thermostat, you must turn on (or off) the ꢁOutdoor Temp

Display". From the Home screen, press press for more area and se-

lect the HELP icon. Press the user preferences box and scroll down

to ꢁOutdoor Temp Display". Press the modify button and use the up/

down arrows to select On (or Off) and then press the save button.

Press done to return to the Home screen.

4. On the thermostat, go past the ꢁAdd or remove non−communicating de-

vices" to the ꢁTo adjust a setting" screen.

5. Use the arrows to select ꢁFurnace" from system devices list; press

edit. From this Furnace screen you will have access to the various air-

flow settings. Set the system air volumes according the needs of the

home. When you change certain settings, the system will prompt you

to ꢁplease view and save all red settings". Use the arrows to select the

red settings and press edit. Either make changes or not, but press

ꢂ

Turn the Indoor Humidity Display on and off in a similar manner as

above.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 65

icomfortꢀ−enabled furnace & non−communicating air conditioner

An icomfort−enabled gas furnace (G71MPP, EL296V, SLP98, SL280) with a

conventional non−communicating air conditioner.

7. Use the arrows to select ꢁFurnace" from system devices list; press

edit. From this Furnace screen you will have access to the various air-

flow settings. Set the system air volumes according the needs of the

home. When you change certain settings, the system will prompt you

to ꢁplease view and save all red settings". Use the arrows to select the

red settings and press edit. Either make changes or not, but press

save either way. The red settings will go away after pressing save.

When all CFM settings are complete, press the back button. Press

next step to advance to the tests button.

1. WiringꢀSee Communicating Indoor/Non−Communicating Out-

door System Wiring diagram on Page 59 and Optional Accessories

Wiring (Page 61) for any accessories being installed with the system.

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the gas furnace (R, i+, i−, C)

ꢃ

Conventional thermostat wire with 2 to 4 conductors from the fur-

nace terminal strip to the AC unit (Y1, C, & on some models, R &

Y2)

8. Using up/down arrows, select the test options individually (if so de-

sired, you may choose to TEST ALL) and press the select button. (If

selecting individual tests, repeat until you have selected all you intend

to run.)

ꢃ

Wiring as required for accessories

2. Cut option link ꢁ2−stage compr" (Y1 to Y2, W915) on furnace control on

two−stage AC units only.

9. Press the start button. Confirm the AC unit is electrically energized and

operational. Press done.

3. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

10. Exit the installer setup mode by selecting the EXIT button.

TIPS

4. In the installer setup button, select ꢁAdd or Remove non−communicat-

ing equipmentꢁ by using the yes button.

ꢂ

If the thermostat ꢁSystem Setting" only shows ꢁheat onlyꢁ or ꢁoffꢁ

choices and does not offer a choice for ꢁcooling" you must ꢁInstall" the

non−communicating air conditioning unit. Select ꢁAdd or Remove non−

communicating" under the setup button in the Installer Section. Select

ꢁOutdoor Unit Type", press the edit button and then choose ꢁ1 Stage

AC" or ꢁ2 Stage AC" and press the save button.

5. Select the ꢁOutdoor Unit Type" from the device list using the up/down

arrows and press the edit button. Then select the AC type (1−stage AC

or 2−stage AC) and press the save button.

6. Select the outdoor unit capacity and minimum outdoor unit capacity

(2−stage only). Press save after editing each setting. Press back when

finished to return to the adjust screen.

ꢂ

On two−Stage Air Conditioners you must cut the ꢁW915 2 Stage

Compr" link on the furnace control.

506920−01 09/12

Page 66

Setting up typical systemsꢁFURNACE & HEAT PUMP (DUAL FUEL)

icomfortꢀ−enabled Furnace & icomfortꢀ−enabled HP unit (Dual fuel)

Dual fuel system using an icomfort−enabled gas furnace (G71MPP, EL296V,

SLP98, SL280) with an icomfort−enabled heat pump (XP17 or XP21 only).

When all CFM settings are complete, press the back button. Press

next step to advance to the tests button.

8. Test the system operation and confirm the HP unit is electrically ener-

gized and operational. Press done.

1. Wiringꢀsee Communicating System Wiring diagram on Page 59

and Optional Accessories Wiring (Page 61) for any accessories be-

ing installed with the system.

9. Exit the installer setup mode by selecting the EXIT button.

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the gas furnace (R, i+, i−, C)

4−conductor thermostat wire from the furnace terminal strip to the

icomfort−enabled HP (R, i+, i−, C)

Wiring as required for accessories

TIPS

ꢂ

High & Low Balance points are enabled and adjusted under the install-

er section of the thermostat. In the equipment button select ꢁSystem"

and press edit. Scroll down to ꢁBalance Point Control" and press edit

and select Enabled and then save.

2. DO NOT cut any option link on furnace control.

ꢂ

An outdoor temperature sensor is provided in an icomfort−enabled heat

pump unit. To display the outdoor temperature on the home screen of

the thermostat, you must turn on (or off) the ꢁOutdoor Temp Display".

From the Home screen, press press for more area and select the

HELP icon. Press the user preferences box and scroll down to ꢁOut-

door Temp Display". Press the modify button and use the up/down ar-

rows to select On (or Off) and then press the save button. Press done

to return to the Home screen.

3. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

4. On the thermostat, go past the ꢁAdd or remove non−communicating de-

vices" to the ꢁTo adjust a setting" screen. Select ꢁSystem" from the de-

vice list using the up/down arrows and press the edit button

5. Select Balance Point Control and press edit. Use the down arrow to

select ꢁEnabled" and press save. High and Low Balance Points will ap-

pear in red.

ꢂ

Turn the Indoor Humidity Display on and off in a similar manner as

above.

Gas heat is not provided to temper the air during defrost cycles.

6. Complete Balance Point Control by editing the High and Low Balance

Points. It is not necessary to change the defaults, but you must save

each setting. The red settings will go away after pressing save. Press

the back button to return to the adjust screen.

icomfortꢀ−enabled Furnace &

non−communicating HP unit (Dual fuel)

7. Use the arrows to select ꢁFurnace" from system devices list; press

edit. From this Furnace screen you will have access to the various air-

flow settings. Set the system air volumes according the needs of the

home. When you change certain settings, the system will prompt you

to ꢁplease view and save all red settings". Use the arrows to select the

red settings and press edit. Either make changes or not, but press

save either way. The red settings will go away after pressing save.

NOTE − DO NOT use a conventional non−communicating heat pump unit in

an icomfort dual fuel system.

TIPS

ꢂ

A conventional thermostat capable of controlling a dual fuel system,

like the ComfortSense 7000, must be selected for this type of applica-

tion.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 67

Setting up typical systemsꢁAIR HANDLER & AIR CONDITIONER

icomfortꢀ−enabled Air Handler & icomfortꢀ−enabled Air Conditioner

An icomfort−enabled air handler (CBX32MV or CBX40UHV) with an icom-

fort−enabled air conditioner (XC17 or XC21 only).

red settings and press edit. Either make changes or not, but press

save either way. The red settings will go away after pressing save.

When all CFM settings are complete, press the back button. Press

next step to advance to the tests button.

NOTE − IMPORTANT! Be sure to configure the air handler control so that

heat strips (if used) information will be detected by the icomfort thermostat.

This must be done prior to powering up the system and thermostat.

7. Test the system operation and confirm the system is electrically ener-

gized and operational. Particularly, test the heat strips (when used) to

insure the auxiliary stages operate as designed. Press done.

1. Configure air handler control (AHC) for auxiliary heat strips if used.

2. WiringꢀSee Communicating System Wiring diagram on Page 59

and Optional Accessories Wiring (Page 61) for any accessories be-

ing installed with the system.

8. Exit the installer setup mode by selecting the EXIT button.

TIPS

ꢂ

If the thermostat ꢁSystem Setting" does not offer a choice for ꢁemerg.

heat" and or the electric heat will not function; the electric heat has not

been configured. Configure the electric heat as described on Page 64,

or for complete detail, see the Air Handler installation instructions. Re-

configure the icomfort system by entering the installer program and se-

lecting the setup button and following the prompts.

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the air handler (R, i+, i−, C)

4−conductor thermostat wire from the air handler terminal strip to

the icomfort−enabled AC (R, i+, i−, C)

Wiring as required for accessories

3. DO NOT cut any option link on air handler control.

ꢂ

An outdoor temperature sensor is provided in an icomfort−enabled air

conditioning unit. To display the outdoor temperature on the home

screen of the thermostat, you must turn on (or off) the ꢁOutdoor Temp

Display". From the Home screen, press press for more area and se-

lect the HELP icon. Press the user preferences box and scroll down

to ꢁOutdoor Temp Display". Press the modify button and use the up/

down arrows to select On (or Off) and then press the save button.

Press done to return to the Home screen.

4. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

5. On the thermostat, go past the ꢁAdd or remove non−communicating

equipment" to the ꢁTo adjust a setting" screen.

6. Use the arrows to select ꢁAir Handler" from system devices list; press

edit. From this Air Handler screen you will have access to the various

airflow settings. Set the system air volumes according the needs of the

home. When you change certain settings, the system will prompt you

to ꢁplease view and save all red settings". Use the arrows to select the

ꢂ

Turn the Indoor Humidity Display on and off in a similar manner as

above.

506920−01 09/12

Page 68

icomfortꢀ enabled Air Handler & conventional non−communicating Air Conditioner

An icomfort air handler (CBX32MV or CBX40UHV) with a conventional non−

communicating AC unit.

9. Use the arrows to select ꢁAir Handler" from system devices list; press

edit. From this Air Handler screen you will have access to the various

airflow settings. Set the system air volumes according the needs of the

home. When you change certain settings, the system will prompt you

to ꢁplease view and save all red settings". Use the arrows to select the

red settings and press edit. Either make changes or not, but press

save either way. The red settings will go away after pressing save.

When all CFM settings are complete, press the back button. Press

next step to advance to the tests button.

NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips

(if used) prior to powering up the system and thermostat.

1. Configure air handler control (AHC) for auxiliary heat strips if used.

2. Wiringꢀsee Communicating Indoor / Non−Communicating Out-

door System Wiring diagram on Page 59 and Optional Accessories

Wiring (Page 61) for any accessories being installed with the system.

10. Test the system operation and confirm the system is electrically ener-

gized and operational. Particularly, test the heat strips (when used) to

insure the auxiliary stages have been detected and are operational.

Press done.

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the air handler (R, i+, i−, C)

icomfort air handler to conventional AC (5 – 8 wires). (Y1, Y2, C,

R, W1,W2)

Wiring as required for accessories

11. Exit the installer setup mode by selecting the EXIT button.

3. On 2−stage AC, cut the ꢁW915 2 Stage Compr" onboard clippable link.

TIPS

ꢂ

If the thermostat ꢁSystem Setting" does not offer a choice for ꢁemerg.

heat" and or the electric heat will not function; the electric heat has not

been configured. Configure the electric heat as described on Page 64,

or for complete detail, see the Air Handler installation instructions. Re-

configure the icomfort system by entering the installer program and se-

lecting the setup button and following the prompts.

4. On air handler control, remove jumper between W1 & W2 for two−stage

electric heat only.

5. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

6. In the installer setup button, select ꢁAdd or Remove non−communicat-

ing equipmentꢁ by using the yes button.

If the thermostat ꢁSystem Setting" only shows ꢁheat onlyꢁ or ꢁoffꢁ

choices and does not offer a choice for ꢁcooling" you must ꢁInstall" the

non−communicating air conditioning unit. Select ꢁAdd or Remove non−

communicating" under the setup button in the Installer Section. Select

ꢁOutdoor Unit Type", press the edit button and then choose ꢁ1 Stage

AC" or ꢁ2 Stage AC" and press the save button.

7. Select the ꢁOutdoor Unit Type" from the device list using the up/down

arrows and press the edit button. Then select the AC type (1−stage AC

or 2−stage AC) and press the save button.

8. On the thermostat, go past the ꢁAdd or remove non−communicating de-

vices" to the ꢁTo adjust a setting" screen. Select the ꢁSystem" from the

device list using the up/down arrows and press the edit button

On two−stage Air Conditioners you must cut the ꢁW915 2 Stage Compr"

Link on the air handler control.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 69

Setting up typical systemsꢁAIR HANDLER & HEAT PUMP UNITS

icomfortꢀ−enabled Air Handler & icomfortꢀ−enabled Heat Pump unit

An icomfort air handler (CBX32MV or CBX40UHV) with an icomfort−enabled

heat pump (XP17 or XP21 only) unit.

8. Use the arrows to select Air Handler from system devices list. Press

edit. From this Air Handler screen you will have access to the various

airflow settings. Set the system air volumes according the needs of the

home. When all CFM settings are complete, press the back button.

Address any red settings as described in steps 6 and 7. Press next

step to advance to the tests button.

NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips

(if used) prior to powering up the system and thermostat.

1. Configure air handler control (AHC) for auxiliary heat strips if used.

9. Test the system operation and confirm the system is electrically ener-

gized and operational. Particularly, test the heat strips (when used) to

ensure the auxiliary stages operate as designed. Press done.

10. Exit the installer setup mode by selecting the EXIT button.

2. WiringꢀSee Communicating System Wiring diagram on Page 59

and Optional Accessories Wiring (Page 61) for any accessories be-

ing installed with the system.

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the air handler (R, i+, i−, C)

4−conductor thermostat wire from the air handler terminal strip to

the icomfort−enabled HP (R, i+, i−, C)

Wiring as required for accessories

TIPS

ꢂ

If the thermostat ꢁSystem Setting" does not offer a choice for ꢁemerg.

heat" and or the electric heat will not function; the electric heat has not

been configured. Configure the electric heat as described on Page 64,

or for complete detail, see the Air Handler installation instructions. Re-

configure the icomfort system by entering the installer program and se-

lecting the setup button and following the prompts.

3. DO NOT cut any option link on air handler control.

4. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

ꢂ

High & low balance points are enabled and adjusted under the installer

section of the thermostat. In the equipment button select ꢁSystem" and

press edit. Scroll down to ꢁBalance Point Control" and press edit and

select Enabled and then save.

5. On the thermostat, go past the ꢁAdd or remove non−communicating de-

vices" to the ꢁTo adjust a setting" screen. Select the ꢁSystem" from the

device list using the up/down arrows and press the edit button

An outdoor temperature sensor is provided in an icomfort enabled heat

pump unit. To display the outdoor temperature on the home screen of

the thermostat, you must turn on (or off) the ꢁOutdoor Temp Display".

From the Home screen, press press for more area and select the

HELP icon. Press the user preferences box and scroll down to ꢁOut-

door Temp Display". Press the modify button and use the up/down ar-

rows to select On (or Off) and then press the save button. Press done

to return to the Home screen.

6. Select Balance Point Control and press edit. Use the down arrow to

select Enabled and press save. High and Low Balance Points will ap-

pear in red.

7. Complete Balance Point Control by editing the High and Low Balance

Points. It is not necessary to change the defaults, but you must save

each setting. The red settings will go away after pressing save. Press

the back button to return to the adjust screen.

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icomfortꢀ−enabledAir Handler & conventional non−communicating Heat Pump unit

An icomfort air handler (CBX32MV or CBX40UHV) with a conventional non−

communicating heat pump unit.

9. Complete Balance Point Control by editing the High and Low Balance

Points. It is not necessary to change the defaults, but you must save

each setting. The red settings will go away after pressing save. Press

the back button to return to the adjust screen.

NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips

(if used) prior to powering up the system and thermostat.

10. Use the arrows to select Air Handler from system devices list. Press

edit. From this Air Handler screen you will have access to the various

airflow settings. Set the system air volumes according the needs of the

home. When all CFM settings are complete, press the back button.

Address any red settings as described in steps 8 and 9. Press next

step to advance to the tests button.

1. Configure air handler control (AHC) for auxiliary heat strips if used.

2. Wiringꢀsee Communicating System Wiring diagram on Page 59

and Optional Accessories Wiring (Page 61) for any accessories be-

ing installed with the system.

ꢃ

4−conductor thermostat wire from the icomfortWi-Fiꢁ thermostat

to the air handler (R, i+, i−, C)

11. Test the system operation and confirm the system is electrically ener-

gized and operational. Particularly, test the heat strips (when used) to

insure the auxiliary stages operate as designed. Press done.

ꢃ

Conventional thermostat wire with 5 to 6 conductors from icom-

fort air handler to conventional HP (5 – 8 wires). (Y1, C, R, W1, O,

and on some models Y2)

12. Exit the installer setup mode by selecting the EXIT button.

ꢃ

Wiring as required for accessories

TIPS

3. On air handler control, with 2−stage HP cut the ꢁW915 2 Stage Compr"

onboard clippable link. Cut W951 between W1 & W2 for two−stage

electric heat only.

ꢂ

If the thermostat ꢁSystem Setting" does not offer a choice for ꢁemerg.

heat" and or the electric heat will not function; the electric heat has not

been configured. Configure the electric heat as described on Page 64,

or for complete detail, see the Air Handler installation instructions. Re-

configure the icomfort system by entering the installer program and se-

lecting the setup button and following the prompts.

4. After the entire system is wired, power up the system; the icomfortWi-

Fiꢁ thermostat will check the system for installed communication de-

vices.

ꢂ

High & low balance points are enabled and adjusted under the installer

section of the thermostat. In the equipment button select ꢁSystem" and

press edit. Scroll down to ꢁBalance Point Control" and press edit and

select Enabled and then save.

5. In the installer setup button, select ꢁAdd or Remove non−communicat-

ing equipmentꢁ by using the yes button.

6. Select the ꢁOutdoor Unit Type" from the device list using the up/down

arrows and press the edit button. Then select the heat pump type

(1−stage HP or 2−stage HP) and press the save button.

If an optional outdoor temperature sensor has been installed, you may

display the outdoor temperature on the home screen of the thermostat.

To turn on (or off) the ꢁOutdoor Temp Display". From the Home screen,

press press for more area and select the HELP icon. Press the user

preferences box and scroll down to ꢁOutdoor Temp Display". Press

the modify button and use the up/down arrows to select On (or Off)

and then press the save button. Press done to return to the Home

screen.

7. On the thermostat, go past the ꢁAdd or remove non−communicating de-

vices" to the ꢁTo adjust a setting" screen. Select the ꢁSystem" from the

device list using the up/down arrows and press the edit button.

8. Select Balance Point Control (if outdoor sensor is installed) and press

edit. Use the down arrow to select ꢁEnabled" and press save. High and

Low Balance Points will appear in red.

icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat

Page 71

Table 7. Replacement Controls

The following kits have been set up for replacement of the icomfortꢁ−enabled controls.

Please note that control kits are unit− and revision−specific.

icomfortꢀ−Enabled Unit

Replacement Kit Catalog No.

65W69

Control Part No.

605341−01

102813−02

103130−01

605341−02

605341−03

103369−01

605341−05

103369−01

605341−04

103369−01

605341−06

103369−01

G71MPP (rev. 03 or later)

SLP98 (rev. 01 or later)

73W45

SL280 (rev. 02 or later)

83W88

EL296 (rev. 01 or later)

83W88

CBX40UHV (rev. 02 or later) AND CBX32MV (rev. 06 or later)

XC17−24/30/42/60 (rev. 02 thru 04) AND XC17−36/48 (rev. 02 thru 05)

XC17−24/30/42/60 (rev. 05 or later) AND XC17−36/48 (rev. 06 or later)

XP17−24/30 (rev. 02 thru 05) AND XP17−36/42/48/60 (rev. 02 thru 04)

XP17−24/30 (rev. 06 or later) AND XP17−36/42/48/60 (rev. 05 or later)

XP19−24/36/48/60 (rev. 06 or later)

65W70

65W71

87W24/96W55

65W73

87W24/96W55

65W72

XC21−24/36/48/60 (rev. 05 thru −07)

XC21−24/36/48/60 (rev. 08 or later)

87W24/96W55

65W74

XP21−24 (rev. 01 thru 04) AND XP21−36/48/60 (rev. 01 thru 03)

XP21−24 (rev. 05 or later) AND XP21−36/48/60 (rev. 04 or later)

87W24/96W55

REVISIONHISTORY

Date

03−2012

05−2012

Revision description

Date

04−2012

09−2012

Revision description

Preliminary release

Pilot release; added note page 1; new registration screen page.26.

Minor Revisions

Changed Wi−Fi button; add Gelaskins; minor software changes; alert

code corrections

506920−01 09/12

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