Honeywell TH8110U Thermostat User Manual

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TH8110U Touch Screen

Programmable Thermostats

INSTALLATION INSTRUCTIONS

APPLICATION

The TH8110U Universal Programmable Thermostats provide electronic control of 24 Vac heating and cooling systems

or 750 mV heating system. See Table 1 for a general description.

Table 1. TH811 Thermostats Description.

Power

Model

Method

Changeover

System Selection

Fan Selection

Comments

TH8110U

Batteries or

common wire

Automatic or

manual

selectable

Heat-Off-Cool-Auto

On-Auto-Circ

System and Fan

selection vary based on

system type

RECYCLE NOTICE

If this control is replacing a control that contains

mercury in a sealed tube, do not place your old

control in the trash. Dispose of properly.

YES

Contact your local waste management authority

for instructions regarding recycling and the

proper disposal of the old control.

5 FEET

1.5 METERS]

[

INSTALLATION

When Installing this Product...

Read these instructions carefully. Failure to follow

the instructions can damage the product or cause

a hazardous condition.

M19925

Check the ratings given in the instructions to make

sure the product is suitable for your application.

Installer must be a trained, experienced service

technician.

After completing installation, use these instructions

to check out the product operation.

Fig. 1. Selecting thermostat location.

Do not install the thermostat where it can be affected by:

—

Drafts or dead spots behind doors and in corners.

Hot or cold air from ducts.

Radiant heat from sun or appliances.

Concealed pipes and chimneys.

Unheated (uncooled) areas such as an outside wall

behind the thermostat.

Selecting Location

Install the thermostat about 5 ft. (1.5m) above the floor in

an area with good air circulation at average temperature.

See Fig. 1.

U.S. Registered Trademark

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Securely tighten each screw.

Installing Wallplate

Push excess wire back into the hole.

Plug the hole with nonflammable insulation to

prevent drafts from affecting the thermostat.

CAUTION

Can cause electrical shock or equipment

Electrical Hazard.

HEAT PUMP

CONVENTIONAL

damage.

Disconnect power before wiring.

The thermostat can be mounted horizontally on the wall

or on a 4 in. x 2 in. (101.6 mm x 50.8 mm) wiring box.

O/B

AUX

Position and level the wallplate (for appearance

only).

Use a pencil to mark the mounting holes.

SCREW TERMINALS

M19951

WALL

WIRES THROUGH WALL

AND WIRE SLOT

Fig. 3. Selecting terminal identifications for

system type.

WALL ANCHORS (2)

Table 2. Selecting Terminal Identifications for

System Type.

Wallplate

Terminal Diagram

Identifications Reference

Wiring

MOUNTING

HOLES

System Type

Standard Heat/Cool

Heat Only

Conventional

Heat Pump

5, 6

MOUNTING

SCREWS (2)

Heat Only with Fan

Heat Only Series 20

Cool Only

M19916

Fig. 2. Mounting wallplate.

Remove the wallplate from the wall and, if drywall,

drill two 3/16-in. holes in the wall, as marked. For

firmer material such as plaster, drill two 7/32-in.

holes. Gently tap anchors (provided) into the drilled

holes until flush with the wall.

Heat Pump with No

Auxiliary Heat

Position the wallplate over the holes, pulling wires

through the wiring opening. See Fig. 2.

Insert the mounting screws into the holes and

tighten.

WIRING (FIG. 5-11)

All wiring must comply with local electrical codes and

ordinances.

M19917

Select set of terminal identifications (Table 2) that

corresponds with system type (conventional or

heat pump) in Fig. 3.

Loosen the screws for the appropriate system type

selected; see Table 2. Insert wires in the terminal

block under the loosened screw. See Fig. 4.

Fig. 4. Inserting wires in terminal block.

IMPORTANT

Use 18 gauge thermostat wire.

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

CONVENTIONAL

OPTIONAL

24 VAC

4 VAC

COMMON

CONNECTION

COMMON

CONNECTION

FAN

HEAT RELAY

RELAY

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

COMPRESSOR

CONTACTOR

HEAT RELAY

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

FACTORY INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE

ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

FROM THE THERMOSTAT CABLE.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE

ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

M19897

FROM THE THERMOSTAT CABLE.

M19895

Fig. 7. Typical hookup of heat-only system

(1H conventional).

Fig. 5. Typical hookup of conventional single-stage

heat and cool system with single transformer

(

1H/1C conventional).

CONVENTIONAL

OPTIONAL

4 VAC

COMMON

OPTIONAL

CONNECTION

4 VAC

COMMON

FAN

RELAY

CONNECTION

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

FAN

RELAY

HEAT RELAY

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

COMPRESSOR

CONTACTOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

HEAT RELAY

FACTORY INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE

ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

FROM THE THERMOSTAT CABLE.

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

M19898

REMOVE FACTORY INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE

ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

FROM THE THERMOSTAT CABLE.

Fig. 8. Typical hookup of heat only system with fan

(1H conventional).

M19896

Fig. 6. Typical hookup of conventional single-stage

heat and cool system with two transformers

(

1H/1C conventional).

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

CONVENTIONAL

OPTIONAL

24 VAC

COMMON

CONNECTION

FAN

RELAY

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

COMPRESSOR

CONTACTOR

SERIES 20

MOTOR OR

VALVE

TR TR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

FACTORY INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE

ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

FROM THE THERMOSTAT CABLE.

FACTORY INSTALLED JUMPER.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE

ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

FROM THE THERMOSTAT CABLE.

M19900

M19899

Fig. 10. Typical hookup of cool only system

(1C conventional).

Fig. 9. Typical hookup of heat only Series 20 system.

HEAT PUMP

O/B

AUX

OPTIONAL

4 VAC

COMMON

CONNECTION

FAN RELAY

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

CHANGEOVER

VALVE

COMPRESSOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

FACTORY INSTALLED JUMPER.

"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS.

WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

M19903

Fig. 11. Typical hookup of single-stage heat pump with no auxiliary/backup heat (1H/1C heat pump).

system, use the common from the cooling transformer to

connect to C screw and remove the jumper wire between

the R and Rc screws.

Powering the Thermostat

There are two different ways to power the thermostat:

•

Batteries (three AAA alkaline).

24 Vac Common wire.

Inserting Batteries (Optional)

If not using a 24 Vac Common to power the thermostat,

install three AAA alkaline batteries (included) in the back

of the thermostat. Make sure the positive and negative

terminals are oriented correctly, as marked on the device.

See Fig.12.

Wiring 24 Vac Common

Wire the common side of the transformer to the C screw

of the thermostat wallplate. When installing in a single

transformer system, keep jumper wire between the R

and Rc screws. When installed in a two-transformer

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

BATTERIES (3)

REMOVE TAB TO ACTIVATE REAL TIME CLOCK

SALTION

M19918

M19920

Fig. 12. Installing batteries on thermostat back.

Fig. 14. Removing tab to activate real-time clock.

Mounting the Thermostat

This thermostat is designed to automatically keep current

time and day in memory for up to ten years under normal

use after calendar is set. When thermostat is first

Align the terminal screw blocks with the pins on the

back of the thermostat.

powered, display is ready to enter calendar date (Fig.15).

Push the thermostat straight onto the wallplate.

See Fig. 13.

SET CURRENT DAY

SET MONTH

WALL

MON

TUE

WED

THU

FRI

SAT

SUN

DONE

USE ARROWS TO SET YEAR AND TIME

MON

WED

THU

FRI

SAT

SUN

SLATION

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

CHANGE FILTER UV LAMP HUMIDIFIER PAD

M19919

Fig. 13. Mounting thermostat on wallplate.

DONE

Adjusting Real-Time Clock

M19921

Setting Calendar and Time

Locate and remove the tab labeled Remove in the lower

left corner on the thermostat back. The tab must be

removed to activate the real-time clock. See Fig. 14.

Fig. 15. Setting calendar and time after initial

powerup.

IMPORTANT

The tab on back of thermostat in lower-left

corner must be removed to activate this feature.

Using the Thermostat

The thermostat has a touch screen interface. Words or

symbols appear, highlighting keys, as needed, to

complete tasks. Press keys with your fingertips. Sharp

tips on pens or pencils can damage thermostat.

Use arrow keys to set Year, Month and Day (see

Fig. 15).

Press Done key.

Use arrow keys to set current time. See Fig. 15.

Press Done key.

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TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

OPERATION

Entering Installer Setup

1. Thermostat must be powered either with Alkaline

AAA batteries or with 24 Vac Common wire.

2. From the home screen, press System key. (Press

Done or Cancel key to return to home screen.)

3. Five blank touch keys show on the bottom of the

screen between the Done and Cancel keys. Press

and hold the two blank keys on either side of the

center blank key for approximately five seconds

until screen changes. See Fig. 16.

System and Fan Settings

The System default setting is Heat and the Fan default

setting is Auto.

SYSTEM Settings

Heat: Thermostat controls heating system.

Off: Both heating and cooling are off.

Cool: Thermostat controls cooling system.

Auto: Thermostat automatically changes between

heating and cooling systems, depending on indoor

temperature. (See Installer Setup section.)

MON

TUE

WED

THU

FRI

SAT

SUN

Inside

Set To

FAN Settings

The Fan setting can be programmed into the thermostat

schedule for each period (Wake, Leave, Return, Sleep).

See the Owners’ Guide for additional information.

SYSTEM

FS oc lhl oe wd ui nl eg

EM HEAT

OFF

COOL

DONE

CANCEL

Preprogrammed Settings

Table 3 shows the default program settings. See Owners’

Guide for complete instructions on changing the

program.

M19923

Table 3. Default Program Settings.

Setpoints

Schedule

Period

Fan

Setting

Fig. 16. Entering Installer Setup.

Time

Heat

Cool

Wake

Leave

Return

Sleep

6:00AM

₇₈°_F

Auto

4. The Installer Setup Number is displayed in the

lower left. It is a four-digit code beginning with zero.

The factory setting or other choice selection is dis-

played in the lower right. See Fig. 17. This is a two-

digit code shown in the Option column of Table 4.

0 F

(

21 C)

(25.5 C)

8:00AM

6:00PM

10:00PM

₂°_F

₈₅°_F

Auto

(

16.5 C)

(29.5 C)

78^°F

0 F

ADVANCE TO NEXT

INSTALLER SETUP

(

21 C)

(25.5 C)

INSTALLER

SETUP NUMBER

FACTORY

SETTING

₂°_F

82 F

(

16.5 C)

(28 C)

MON

WED

THU

FRI

SAT

SUN

INSTALLER SETUP

This Universal Thermostat works with many different

system types. To operate correctly, the thermostat must

be set up to operate the installed heating and/or cooling

system.

DONE

Installer Setup Menus

Main Menu: Offers the most commonly used options.

It is necessary to enter this menu to set the

thermostat to the type of system it is operating. Many

applications use only the Main Menu.

CHANGE THE

FACTORY

PRESS TO EXIT

INSTALLER SETUP

SETTING

M19922

Fig. 17. Installer Setup Number and factory setting

selection locations.

Regional Menu: Offers choices often changed due to a

particular area or region. For example, temperature

display in Fahrenheit or Celsius is offered in this menu.

Changing Installer Setup Selections

Advance to the next Installer Setup Number by

pressing the up and down arrow keys to the right of

the four-digit Installer Setup Number. See Fig. 17.

Change the factory Setting Options by pressing the

up and down arrow keys right of the two-digit code

selection. See Fig. 17.

Advanced Settings Menu: Offers more settings to fully

customize the thermostat. Many of these settings do not

require changing from the factory settings.

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

IMPORTANT

Exiting Installer Setup

The three Installer Setup Menus (Tables 4-6)

show all available options. These options cus-

tomize themselves as you make selections to

Installer Setup. So not all Installer Setup

Selections are shown or are available to

change.

Press Done key to exit Installer Setup screen.

Table 4. Main Installer Setup Menu.

Factory Setting

Other Choices

Installer

Setup

Number

1 thru 0099

0120

Select

Option

Description

Options

Description

Comments

Not used.

—

Date (Year

Upper)

Set first two digits of 21

current calendar

21 —first two digits of 2000 -2178

current calendar year (21xx) available

year (20 for year

005, etc)

Date (Year

Lower)

0130

Represents last two 00 -99

digits of current

calendar year

Select last two digits of

current calendar year.

2001-2178

available

(

2004).

Date (Month) 0140

Digit(s) represents 1-12

current calendar

month.

Select number that

represents current calendar

month.

—

Date

Day)

0150

0160

Digit(s) represents 1-31

current calendar

date.

Select number that

represents current calendar

date.

(

Schedule

Options

7-day programming

0 —nonprogrammable

—

System Type 0170

Selection

1 Heat/1 Cool

Conventional

System

1-6

1—1 heat/1 cool

2—single-stage heat pump and defaults vary

(no aux. heat)

Available options

by thermostat.

System selection

automatically

modifies some

default settings

and/or hides other

Installer Setup

options.

3—heat only (no fan)

4 —heat only (with fan)

5—hot water Series 20

(

3-wire or normally open

zone valves)

—cool only

FanOperation 0180

Conventional

Heat pump or electric heat Only shown if

applications where conventional

system is

applications where

equipment controls

fan operation in

heat mode.

thermostat controls fan

operation in heat mode.

selected. If heat

pump is chosen,

fan defaults to

electric.

Reversing

Valve (O/B)

Operation

0190

O/B terminal is

energized for

reversing valve in

cooling

O/B terminal is energized for Only shown if

reversing valve in heating heat pump

system is chosen.

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 4. Main Installer Setup Menu. (Continued)

Factory Setting Other Choices

Installer

Setup

Number

Select

Option

Description

Options

Description

Comments

Cycles per

hour (cph) for

0220

Compressor Stage 1-6

1 cycles per hour

(cph)

1-6 available;

3 is recommended.

—

1st Stage

Compressor

Cycles per

hour (cph) for

0240

Conventional Heat 1-12

Stage 1 cycles per

hour (cph)

1-12 available; typical

settings:

1—1 cph used for steam or is heat pump.

gravity system. Selection in this

3—3 cph used for hot water stage changes

Not shown if

system selection

1st Stage

Conventional

Heat

systems or high efficiency

90% or better) fossil fuel

f o r c e d a i r s y s t e m s .

—5 cph used for standard

default cph for

2nd stage heat.

(

fossil fuel forced air

systems.

9—9 cph used for electric

forced air heat systems.

Continuous

Backlight

0280

0290

Backlight not on

continuously.

Thermostat

backlight comes on

with each key

press.

Backlight is on continuously Option is always

(thermostat must have a shown; however,

common wire attached for continuously on

this function). backlight works

only if thermostat

is wired with 24

vac Common.

Additional

Menu Choices

Only main menu

options are shown.

Installer Test

1,2

1—Main Menu and Regional The majority of

Settings are shown plus application

Installer Test (Tables 5 and 7 require only the

Options shown next

only).

Main Menu

Options.

(

Table 7).

—All remaining Menu/

Options shown plus Installer

Test (Tables 5, 6 and 7).

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 5. Regional Settings Menu.

Factory Setting Other Choices

Installer

Setup

Select

Number

Option

Description

Manual changeover

Options

Description

Comments

Changeover

0300

0310

1—auto

changeover

—

Deadband

Heating and cooling 2 thru 9

setpoints can be set

Heating and

Shown only if

automatic

changeover is

selected.

cooling setpoints

can be set no

closer than

no closer than 3 F

(

1.5 C)

chosen value:

° °

—2 F(1 C )

° °

—3 F(2 C )

—4 F(2.5 C )

—5 F(3 C )

—6 F(3.5 C )

—7 F(4 C )

—8 F(4.5 C )

—9 F (5 C)

Temperature 0320

Indication

Scale

Temperature is

—

displayed in F.

displayed in C.

Daylight

Savings

0330

0340

Daylight savings

enabled (United

States).

0—daylight savings Set to 0 in areas that

is disabled. do not follow

daylight savings.

Remote

No remote

temperature sensor

1,3

1—outdoor Defaults and

temperature sensor Options depend on

for display only. System Type

Temperature

Sensor

(

Outdoor or

3—indoor

selected. Indoor

Indoor)

temperature sensor Temperature Sensor

uses an averaging

network and does

not include on-board

sensor.

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 6. Advanced Settings Menu.

Factory Setting Other Choices

Installer

Setup

Select

Number

Option

Description

Options

1-6

Description

Comments

Furnace Filter 0500

Change

Reminder

Furnace filter

change reminder

off

1—1 0 r u n t im e d a y s

2—3 0 r u n t im e d a y s

3—6 0 r u n t im e d a y s

Run time based on

call for fan.

4—9 0 r u n t im e d a y s

5—1 2 0 r u n t im e d a y s

6—3 6 5 r u n t im e d a y s

Humidifier Pad 0510

Replacement

Reminder

Humidifier pad

replacement

reminder off

1-3

1—90calendardays

2—180calendardays

3—365calendardays

—

UV Lamp

Replacement

Reminder

0520

0530

UV Lamp

replacement

reminder off

1—365 calendar days

—

Adaptive

Intelligent

Recovery™

Adaptive

Intelligent

Recovery™

control is

0—conventional

recovery (system starts

recovery at

programmed time)

activated(system

starts early so

setpoint is

reached by start

of program

period).

Number of

Periods

0540

0580

Four periods

available (Wake,

Leave, Return,

Sleep)

Two periods availbable Not shown in non-

(Wake and Sleep) programmable is

selected. 2 or 4

applies to all days of

the week.

Minimum

Compressor

Off Time

Five minute

minimum off time

for compressor

0, 2, 3, 4 Minimum number of

minutes compressor is

off between calls for

compressor

—

Heat

Temperature

Range Stop

0600

0610

Highest heating 40 to 89 Temperature range (1°F Shown in 1/2 °C.

setpoint. increments) of heating

setpoint.

Cool

Temperature

Range Stop

Lowest cooling

setpoint.

51 to 99 Temperature range (1°F Shown in 1/2 °C.

increments) of cooling

setpoint.

Clock Format 0640

12-hour clock

format

24-hour clock format

—

Extended Fan 0650

on time Heat

No extended fan 90

operation after

Fan operation is

extended 90 seconds

Not shown if fan

operation is set to

call for heat ends

after call for heat ends. fossil fuel or in Cool

Only Systems

Extended Fan 0660

on time Cool

No extended fan 90

operation after

call for cool ends

Fan operation is

extended 90 seconds

after call for cool ends.

Not shown in Heat

Only Systems.

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

Table 6. Advanced Settings Menu. (Continued)

Factory Setting Other Choices

Installer

Setup

Select

Keypad

Lockout

Number

Option

Description

Options

Description

Comments

0670

Unlocked keypad 1, 2

1—partially locked

Unlocked—all

functions are

—fully locked keypad available.

Partially locked—

only temperature up

and down keys and

ability to enter and

modify Installer

Setup mode are

available.

keypad

Fully locked—only

ability to enter and

modify Installer

Setup mode are

available.

Temperature

Control in Heat

0680

Standard

temperature

control in heating

1, 3

1—less aggressive

temperature control

(could cause

Applies to recovery

ramp and use of

auxiliary heat during

recovery.

temperature

u n d e r s h o o t )

—more aggressive

temperature control

could cause

Choose 1 if getting

temperature

overshoot.

(

temperature overshoot)

Choose 3 if getting

temperature

undershoot.

Temperature

Control in Cool

0690

Standard

temperature

control in cooling

1, 3

1—less aggressive

temperature control

(could cause

Applies to recovery

ramp.

temperature

u n d e r s h o o t )

Choose 1 if getting

temperature

—more aggressive

temperature control

could cause

overshoot.

(

Choose 3 if getting

temperature overshoot) temperature

undershoot.

Temperature

Display Offset

0700

0710

No difference in

displayed

temperature and

actual room

-3, -2, -1,

0, 1, 2, 3

° °

—

3 F(-1.5 C )

2 ° F ( - 1 ° C )

1 ° F ( - . 5 ° C )

F ( 0 . ° C )

° F ( . 5 ° C )

° F ( 1 ° C )

°F (1.5°C)

temperature

Reset

Thermostat

No thermostat

reset.

Resets all Installer

Only calendar

Setup Options to default settings and time are

values and resets retained.

schedule to default

setting.

SYSTEM CHECKOUT

ADVANCED FEATURES

Installer System Test

Outdoor or Indoor Temperature Sensor

The Installer System Test mode is used to test the HVAC

system(s). See Table 7. While in System Test mode,

minimum off -time for compressors is bypassed.

Allow outdoor or indoor temperature sensor to absorb the

air for a minimum of five minutes before taking a reading.

See the Sensor instructions for more information.

The Installer Test is part of Installer Setup options. Enter

Installer Setup screen and press Down arrow key to bring

up test selection(s) quickly. See Fig. 16.

69-1700

TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS

CAUTION

Equipment Damage Hazard.

Minimum compressor off-time is bypassed

during Installer System Test.

Avoid cycling compressor quickly.

Table 7. System Test(s).

Installer

Setup

Factory Setting

Other Choices

Description

Select

Number Options Description Options

Comments

Installer Test

Cool

Test 1

Cool is off

0—cooloff

1—cool stage 1

turns on

System selection deter-

mines tests available and

number of stages shown.

Installer Test

Fan

Test 2

Test 3

Fan is off

Heat is off

0—f an off

1—fan turns on

Installer Test

Heat

0—heat off

1—stage 1heat on

TROUBLESHOOTING (SEE TABLE 8)

Table 8. Troubleshooting.

Symptom

Possible Cause

Action

Display does not come on.

Thermostat is not being

powered.

Check for 24 Vac between C and Rc.

Verify AAA batteries installed correctly and good.

Temperature settings do not

change.

The upper or lower

temperature limits were

reached.

Check temperature setpoints.

Check Installer Setup Numbers 0600 and 0610;

modify.

The keypad is fully locked.

Check Installer Setup Number 0670 to change keypad

lock options.

Heating or cooling does not

come on.

Thermostat minimum off-

time is activated.

Wait up to five minutes for the system to respond.

System selection is not set to Set system Selection to correct position.

Heat or Cool.

O/B terminal is not set

Check Installer Setup Number 0190 and set correctly.

correctly (Heat Pumps only).

System type Selection is

incorrect.

Check Installer Setup Number 0170 and make sure

correct System type is chosen.

Thermostat is calling for Heat

Heating or cooling Check wiring.

Heat on) or Cool (Cool on) but equipment is not operating. Check Installer Setup Number 0170; verify correct

system type is chosen.

(

no heating or cooling is running.

Verify equipment operation in System Test mode.

Thermostat does not respond

when touchpad is pressed.

The keypad is locked.

Check Installer Setup Number 0670 to change keypad

locked options.

Automation and Control Solutions

Honeywell International Inc.

985 Douglas Drive North

Golden Valley, MN 55422

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Scarborough, Ontario

M1V 4Z9

69-1700 G.H. 03-04

www.honeywell.com/yourhome

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