Honeywell THM5421C1008 Thermostat User Manual

VisionPRO IAQ

Total Home Comfort System

PRODUCT DATA

FEATURES

•

Large, clear display with backlight shows the current

and set temperature and time—even in the dark.

•

Touchscreen interaction

Real-time clock keeps time during power failures and

automatically updates to daylight savings.

•

Change/check reminders let you know when to service

or replace filters.

Various Hold options allow you to override the

program schedule, as desired.

Controls humidification to increase homeowner

comfort while protecting woodwork and furnishings.

Controls dehumidification using air conditioner with

high or low speed fan or a whole house dehumidifier.

Controls ventilation with other HRV, ERV, or Freshair

damper. Vent on demand and automatically using

patented advanced ventilation control.

•

Advanced heat pump control featuring balance point

plus 2°F droop to increase homeowner comfort.

APPLICATION

The VisionPRO IAQ Total Home Comfort System features an

effortless, 7-Day programmable touchscreen thermostat that

provides control of temperature, humidification,

dehumidification, and ventilation.

Contents

Application/Features..........................................................

Specifications/Ordering Information ..................................

Installation ........................................................................

Wiring ...............................................................................

Power the Thermostat ......................................................

Installer Setup .................................................................. 12

Operation .......................................................................... 19

Programming .................................................................... 25

Troubleshooting ................................................................ 35

8-0287-1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

SPECIFICATIONS

Thermostat Description:

Finish:

VisionPRO IAQ Thermostats: Premier White color.

THM5421C1008: Premier White color.

C7189U1005 Wall Mount Remote Indoor Sensor: Premier

Feature

Description

Common wire only

Powering method

•

White color.

System types (up to • Gas, oil or electric heat with air

Clock Accuracy: +/- 1 minute per year.

heat/2 cool)

conditioning

•

Warm air, hot water, high-efficiency

furnaces, heat pumps, steam and

gravity

Heat only with fan

Cool only

Resistance Characteristics of Remote Sensors:

C7089U1006 Outdoor Sensor: Negative temperature coeffi-

cient (NTC) means that resistance decreases as the tem-

perature increases. See Table 12 in the Operation section

for sensor resistance characteristics.

C7189U1005 Remote Indoor Sensor: Negative temperature

coefficient (NTC), means that resistance decreases as the

temperature increases. See Table 13 in the Operation sec-

tion for sensor resistance characteristics.

•

Changeover

System setting

Fan setting

Manual or Auto changeover selectable

Heat-Off-Cool-Auto

Auto-On-Circ

Electrical Ratings:

Cool Indication:

VisionPRO IAQ Comfort Systems show “Cool On” on the

thermostat screen when Cool is activated.

Terminal

Voltage (50/60 Hz) Running Current

W1 Heating

20 - 30 Vac

.02 - 1.0A

Heat Indication:

VisionPRO IAQ Comfort Systems show “Heat On” on the

W2/Aux Heating 20 - 30 Vac

W3/Aux2 Heating 20 - 30 Vac

thermostat screen when Heat is activated.

Y Cooling

Y2 Cooling

G Fan

20 - 30 Vac

Auxiliary Heat Indication:

VisionPRO IAQ Comfort Systems show “Aux. Heat On” on

the thermostat screen when Auxiliary Heat is activated.

Calibration:

Temperature Setting Range:

C7089U1006, C7189U1005 and VisionPRO IAQ Comfort Sys-

Heating: 40°F to 90°F(4.5°C to 32°C).

Cooling: 50°F to 99°F (10°C to 37°C).

tems are factory-calibrated and require no field calibration.

Interstage Differential:

Operating Ambient Temperature:

VisionPRO IAQ Comfort Systems operate with droopless

VisionPRO^®IAQ Thermostats: 0°F to 120°F

control. Once the thermostat senses that 1st stage is run-

(-18°C to 49°C).

ning at 90% capacity, the thermostat energizes 2nd stage.

THM5421C1008: -30°F to 150°F (-34°C to 66°C).

C7089U1006: -40°F to 120°F (-40°C to 49°C).

C7189U1005: 45°F to 88°F (7°C to 32°C).

Mounting Means:

VisionPRO IAQ Comfort System: Thermostat mounts directly

on the wall in the living space using mounting screws and

anchors provided. Fits a vertical or horizontal 2 x 4 in. junc-

tion box.

Shipping Temperature:

VisionPRO^®IAQ Thermostats: -30°F to 150°F

(

-34°C to 66°C).

THM5421C1008 Equipment Interface Module (EIM) mounts on

HVAC equipment or on a wall in the equipment room.

C7089U1006 Outdoor Sensor: Mounts outside of living space

with mounting clip and screws provided.

THM5421C1008: -30°F to 150°F (-34°C to 66°C).

Operating Relative Humidity (Non-condensing):

VisionPRO^®IAQ Thermostats: 5% to 90%.

THM5421C1008: 5% to 90%.

C7189U1005 Remote Indoor Sensor: Mounts directly on the

wall using mounting screws and anchors provided.

C7089U1006: 5% to 95%.

C7189U1005: 5% to 95%.

Cover Plate:

2003796-001 Cover Plate is used to cover marks left on the

wall by the old thermostat.

Humidification Setting Range:

Heating: 10% to 60% RH.

Dimensions:

VisionPRO IAQ Comfort System: see Fig. 1.

Dehumidification Setting Range:

Heating: 40% to 80% RH.

THM5421C1008: see Fig. 2

C7089U1006 Outdoor Sensor Mounting Clip: see Fig. 3.

Humidity Display Range:

32003796-001 Cover Plate: see Fig. 4.

C7189U1005 Remote Indoor Sensor: see Fig. 5.

0% to 99%.

Cycle Rates (at 50% Load):

Heating: Selectable 1 - 12 cycles per hour.

Cooling: Selectable 1 - 6 cycles per hour.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

WALLPLATE

-3/8 (86)

1-1/2 (38)

-3/8 (86)

M4488

THERMOSTAT

AND WALLPLATE

-3/8 (35)

Fig. 3. C7089U1006 Outdoor Sensor Mounting Clip

dimensions in in. (mm).

THERMOSTAT

(152)

-7/8 (200)

-5/16 (84)

4-9/16

(116)

-1/2

140)

(

-5/16

84)

(

M23539

Fig. 1. VisionPRO^®IAQ Comfort System

dimensions in in. (mm).

M22139

Fig. 4. 32003796-001 Cover Plate dimensions in in. (mm).

7-9/32

(185)

-57/64

175)

(

-35/64

116)

1-21/64

(34)

(

FRONT VIEW

SIDE VIEW

M23544

Fig. 2. THM5421C1008 Equipment Interface Module

dimensions in in. (mm).

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

-9/32

58)

2-9/32

(58)

(

-1/2 (38)

45/64

18)

1-1/2 (38)

(

M23522

FRONT VIEW

SIDE VIEW

FRONT VIEW (COVER OFF)

Fig. 5. C7189U1005 Remote Indoor Sensor dimensions in in. (mm).

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

INSTALLATION

—

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.

When Installing this Product...

Read these instructions carefully. Failure to follow the

instructions can damage the product or cause a hazard-

ous condition.

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

verify the product operation.

Installing Wallplate

CAUTION

Electrical Hazard.

Can cause electrical shock or equipment damage.

Disconnect power before wiring.

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. 6.

The thermostat can be mounted horizontally on the wall or on a

in. x 2 in. (101.6 mm x 50.8 mm) wiring box.

Position and level the wallplate (for appearance only).

Use a pencil to mark the mounting holes.

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.

YES

5 FEET

[

1.5 METERS]

M19925

Fig. 6. Selecting thermostat location.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Position the wallplate over the holes, pulling wires

through the wiring opening. See Fig. 7.

Insert the mounting screws into the holes and tighten.

NOTE: It is normal for the LED to blink continuously during

startup, and while checking equipment status (Auto

Discover mode).

WALL

WIRES THROUGH WALL

AND WIRE SLOT

WALL ANCHORS (2)

WALL ANCHOR

COMMUNICATION LED

MOUNTING

HOLES

DRILL 3/16 IN. HOLES

FOR DRYWALL. DRILL

M23541

/32 IN. HOLES FOR

PLASTER

MOUNTING

SCREWS (2)

M23543

Fig. 7. Mounting wallplate.

Installing Equipment Interface Module (EIM)

MOUNTING SCREW

M23484

CAUTION

Electrical Hazard.

Fig. 8. Mounting EIM.

Can cause electrical shock or equipment damage.

Disconnect power before wiring.

WIRING

The EIM can be mounted vertically on the HVAC equipment or

on a wall in the equipment room.

All wiring must comply with local electrical codes and

ordinances. See Fig. 10–20.

Position the EIM.

Use a pencil to mark the mounting holes.

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.

Select set of terminal identifications (Table 1) that corre-

sponds with system type.

Loosen the screws for the appropriate system type

selected; see Table 1. See Table 2 for terminal designa-

tion descriptions. Insert wires in the terminal block under

the loosened screw. See Fig. 9.

Position the wallplate over the holes, pulling wires

through the wiring opening.

Insert the mounting screws into the holes and tighten.

See Fig. 8.

Securely tighten each screw.

Push excess wire back into the hole.

Plug the hole with nonflammable insulation to prevent

drafts from affecting the thermostat.

See Fig. 10–20 for typical wiring hookups.

Communication LED

The EIM has an LED (see Fig. 8) that communicates the EIM

status as follows.

Table 1. Selecting Terminal Identifications for System Type.

Wallplate Terminal Wiring Diagram

•

LED blinks rapidly: Normal information transfer.

LED blinks once: Incoming message to EIM.

LED blinks continuously: Wiring problem. Check wiring to

terminals 1, 2, 3.

System Type

Identifications

Reference

10, 11

Standard Heat/Cool Conventional

StandardMultistage Conventional

up to 3 Heat/2 Cool

•

LED always off: Wiring problem. Check wiring to terminals

, 2, 3.

Heat Pump with

Auxiliary Heat

Heat Pump

LED always on: EIM may need replacement.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

NOTES:

When used in a single-transformer system, leave

the metal jumper wires in place between R and Rc,

and Rc and Rh. If used on a two-transformer sys-

tem, remove metal jumper wire between Rc and Rh.

If thermostat is configured for a heat pump system

in the Installer Setup, configure changeover valve

for cool (O-factory setting) or heat (B).

For wiring to a W8835 Zone panel please refer to the product

data sheet included with the panel.

M23541

Fig. 9. Inserting wires in terminal block.

IMPORTANT

COMMUNICATION LED

COMMUNICATION

TERMINALS

Use 18-gauge thermostat wire.

CONV. HP

W1 O/B

Table 2. Terminal Designation Descriptions.

W2 AUX

4 VAC

W3 AUX2

THM5421C1008

Terminal

Designations

Y2 Y2

Function

Terminal 1—data to/from thermostat

Terminal 2—power from thermostat (24Vac)

Terminal 3—common from thermostat

FACTORY INSTALLED

JUMPER BETWEEN R,

RC AND RH

WIRE TO TERMINALS ON THERMOSTAT.

M23485

(24Vac)

Fig. 10. Typical hookup of conventional single-stage heat

and cool system with single transformer

24 Vac Transformer Common

24 Vac Transformer

(

1H/1C conventional).

24 Vac Cooling Transformer

24 Vac Heating Transformer

Humidification Connection (normally open)

HUM1/HUM2

DHM1/DHM2

COMMUNICATION LED

COMMUNICATION

TERMINALS

CONV. HP

W1 O/B

Dehumidification Connection (normally

open or closed based on installer setup)

W2 AUX

4 VAC

AUX2

VNT1/VNT2

W1/O/B

Ventilation connection (normally open)

Stage 1 Heating Relay (Conventional)

Change-over Relay (Heat Pump)

Y2 Y2

W2/AUX

Stage 2 Heating Relay (Conventional)

Auxiliary Heat (fossil fuel or electric) (Heat

Pump)

OIL PRIMARY/

AQUASTAT

FACTORY INSTALLED JUMPER BETWEEN R,

AND RC (REMOVE FACTORY INSTALLED

JUMPER BETWEEN RC AND RH

W3/AUX2

Stage 3 Heating Relay (Conventional)

Auxiliary Heat (fossil fuel or electric) (Heat

Pump)

WIRE TO TERMINALS ON THERMOSTAT.

M23486

Fig. 11. Typical hookup of conventional single-stage heat

and cool system with oil primary (1H/1C conventional).

Stage 1 Compressor Relay

Stage 2 Compressor Relay

Fan Relay

Heat Pump Equipment Monitor

Outdoor Temperature Sensor

Remote Indoor Temperature Sensor

OUT1/OUT2

IN1/IN2

DATS1/DATS2 Discharge Air Temperature Sensor

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

KEY

NORMALLY OPEN, DRY CONTACTS

4 VAC

NORMALLY CLOSED, DRY CONTACTS

M23685

POWERED

HUMIDIFIER

HEAT 1 RELAY

COMMUNICATION LED

COMMUNICATION CONV. HP

TERMINALS

W1 O/B

HEAT 2 RELAY

HEAT 3 RELAY

COOL 1 RELAY

COOL 2 RELAY

FAN RELAY

M23490

W2 AUX

4 VAC

W3 AUX2

Fig. 15. Typical hookup of powered humidifier.

Y2 Y2

FACTORY INSTALLED

JUMPER BETWEEN R,

RC AND RH

4 VAC

WIRE TO TERMINALS ON THERMOSTAT.

M23487

Fig. 12. Typical hookup of conventional system with up to

three-stage heat and two-stage cool with one transformer

FIELD INSTALLED

JUMPER BETWEEN

R AND DHM 1

(

3H/2C, 2H/2C, 2H/1C, 1H/2C, 1H/1C conventional).

LOW SPEED

FAN

CHANGEOVER

COMMUNICATION LED

COMMUNICATION CONV. HP

TERMINALS

W1 O/B

AUX 1 (HEAT 3)

AUX 2 (HEAT 4)

COMP 1

M23491

W2 AUX

Fig. 16. Typical hookup of variable speed blower for

dehumidification in low speed (contacts normally closed).

4 VAC

W3 AUX2

Y2 Y2

COMP 2

NOTE: Connect DHM2 to low-speed fan terminal on air han-

dler for dehumidification with air conditioner and a

low-speed fan.

FAN RELAY

FACTORY INSTALLED

JUMPER BETWEEN R,

RC AND RH

WIRE TO TERMINALS ON THERMOSTAT.

M23488

Fig. 13. Typical hookup of heat pump system

(up to 4H/2C heat pump).

4 VAC

POWERED

DEHUMIDIFIER

FIELD INSTALLED

JUMPER BETWEEN

R AND HUM 1

M23492

NON-POWERED

HUMIDIFIER

Fig. 17. Typical hookup of powered whole house

dehumidifier (contacts normally open).

M23489

Fig. 14. Typical hookup of non-powered humidifier.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

POWER THE THERMOSTAT

•

24 Vac common wire only to EIM or zone panel.

4 VAC

Wiring 24 Vac Common

FIELD INSTALLED

JUMPER BETWEEN

R AND VNT 1

•

Single-Transformer System—Connect the common side of

the transformer to the C screw terminal of the EIM. Leave

the metal jumper wires in place between R, Rc, and RH.

Two-Transformer System—Connect the common side of

the cooling transformer to the C screw terminal of the EIM.

Remove the metal jumper wire between Rc and Rh.

Connect the hot side of heating transformer to Rh and leave

the jumper wire between R and Rc and connect the hot side

of cooling transformer to R or Rc.

•

NON-POWERED

VENTILATOR

M23493

Locate and remove the tab labeled, Remove, in the

lower left corner on the thermostat back. See Fig. 21.

Fig. 18. Typical hookup of fresh air damper.

NOTE: Use this hookup for ventilation using a fresh air

damper.

REMOVE

TAB

SALTION

4 VAC

SALTION

M19920

Fig. 21. Remove tab labeled, Remove, on thermostat back

POWERED

VENTILATOR

M23494

Mount Thermostat to Wallplate

Align the terminal screw blocks with the pins on the back

of the thermostat. Push the thermostat straight onto the

wallplate until it snaps into place. See Fig. 22.

Fig. 19. Typical hookup of powered ventilation.

WALLPLATE

4 VAC

PINS ON

BACK OF

THERMOSTAT

FIELD INSTALLED

JUMPER BETWEEN

DHM 1 AND VNT 1

TERMINAL

SCREW

BLOCK

BLUE

YELLOW

DH90

GREEN

RED

WHITE

FRESH

AIR

DAMPER

M23542

M23495

Fig. 22. Mount thermostat to wallplate.

Fig. 20. Hookup of Honeywell DH90 with fresh air intake for

ventilation.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

IMPORTANT

Locate and Mount C7089U1006 Outdoor

Erratic temperature readings from a sensor can occur

as a result of any of the wiring practices described

below. Avoid these practices to assure correct opera-

tion. Use shielded cable to reduce interference if

rerouting sensor wiring is not possible.

Temperature Sensor (Optional)

Mount the sensor where (see Fig. 23):

•

cannot tamper with settings.

there is good air circulation.

it can measure true outdoor ambient temperature.

surface is flat.

wire distance between C7089U1006 and EIM is less than

—

Be sure wires have a cable separate from the thermo-

stat cable.

Do not route temperature sensor wiring with building

power wiring, next to control contactors or near light

dimming circuits, electric motors or welding

equipment.

200 feet.

Do not mount the sensor:

•

in direct sunlight.

—

Avoid poor wiring connections.

Avoid intermittent or missing building earth ground.

where hot or cold air blows on the sensor. Discharge line

from an outdoor compressor unit, vent or fan causes

inaccurate temperature readings.

•

where snow, ice or debris can cover it.

CAUTION

Can cause electrical shock or equipment damage.

Disconnect power supply before connecting wiring.

Use the following steps to mount the sensor:

Electrical Shock Hazard.

Remove the sensor from the mounting clip.

Mark the area on the location selected for mounting the

sensor mounting clip.

Mount the clip.

Wiring must comply with applicable codes, ordinances and

regulations:

Wire C7089U1006 Outdoor Sensor to OUT1and OUT2

terminals on the EIM. If leadwire provided is not long

enough (60 in.), run a cable to a hole at C7089U1006

location.

a. Using color-coded, 18-gauge thermostat wire is

recommended. For example of general wiring of

C7089U1006, see Fig. 24.

b. Pigtail wiring can be used.

Mount C7089U1006 in its mounting clip.

Plug wiring hole using nonhardening caulk or putty.

WIRING HOLE

C7089

THROUGH

STRUCTURE

M7514

Fig. 23. Typical locations for C7089U1006 Outdoor Sensor.

Wire C7089U1006 Outdoor Sensor

USE APPROPRIATE MOUNTING MEANS FOR THE

TYPE OF STRUCTURE.

CAUTION

PLUG WIRING HOLE WITH NON-HARDENING CAULK

OR PUTTY.

M23525

Electrical Interference (Noise) Hazard.

Can cause erratic system operation.

Keep wiring at least one foot away from large inductive

loads such as motors, line starters, lighting ballasts and

large power distribution panels.

Fig. 24. Wire C7089U1006 Outdoor Sensor to the EIM.

If an outdoor temperature sensor is installed, the thermostat

displays the outside temperature in the lower right corner of the

Home Screen.

Use shielded cable to reduce interference when

rerouting is not possible.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

MON

TUE

WED

THU

FRI

SAT

SUN

YES

FAN

Inside

Set To

AUTO

Following

Schedule

5 FEET

(1.5 METERS)

SYSTEM

HEAT

Outside

SCHED

HOLD

CLOCK SCREEN MORE

M4476

M22453

Fig. 25. Typical location for C7189U1005 Indoor Sensor.

If thermostat is set to Auto Changeover System mode, press

the More key until the outside temperature is shown on the

screen.

Wire C7189U1005 Indoor Sensor

MON

TUE

WED

THU

FRI

SAT

SUN

CAUTION

Electrical Interference (Noise) Hazard.

Can cause erratic system operation.

Keep wiring at least one foot away from large inductive

loads such as motors, line starters, lighting ballasts and

large power distribution panels.

Outside

IMPORTANT

Erratic temperature readings from a sensor can occur

as a result of any of the wiring practices described

below. Avoid these practices to assure correct

operation.

SC HH EE DD

H OO LL DD

WAKE

CLOCK SCREEN

LEAVE RETURN SLEEP CANCEL

DONE

M22448

—

Be sure wires have a cable separate from the thermo-

stat cable.

Do not route temperature sensor wiring with building

power wiring, next to control contactors or near light

dimming circuits, electric motors or welding equipment.

Locate and Mount C7189U1005 Remote

Indoor Temperature Sensor (Optional)

Choose a location (see Fig. 25) for mounting the sensor

on an inside wall about 5 ft (1.5m) above the floor.

Be sure wire distance between C7189U1005 and EIM is

less than 200 feet.

— Avoid poor wiring connections.

— Avoid intermittent or missing building earth ground.

Make sure there is good air circulation at average tem-

perature at the chosen location. Avoid the following loca-

tions because they can introduce errors in sensor

measurements. See Fig. 25.

CAUTION

Electrical Shock Hazard.

Can cause electrical shock or equipment damage.

Disconnect power supply before connecting wiring.

a. Hot areas caused by:

(

a)Concealed pipes or ducts.

Wiring must comply with applicable codes, ordinances and

regulations.

b)Drafts from fireplaces or other heat sources.

c)Convection or radiant heat from the sun or

electrical equipment.

Wire C7189U1005 Indoor Sensor to IN1and IN2 termi-

nals on the EIM. For an example of general wiring of

C7189U1005, see Fig. 26 to wire one sensor and Fig. 27

to wire multiple sensors.

b. Cold areas caused by:

(a)Concealed pipes or ducts.

(b)Drafts from windows and doors.

(c)Unheated areas on the other side of the wall

location.

Push excess wire back into the hole. Plug the hole using

nonhardening caulk, putty or insulation to prevent drafts

from affecting performance.

c. Dead air areas:

(

a)Behind doors, furniture and curtains.

b)In corners and alcoves.

Remove C7189U1005 cover.

Mount C7189U1005 to the wall using the screws and

anchors provided.

Mark the area on the wall selected for mounting the

C7189U1005 Sensor.

Run wire cable to a hole at the selected wall location.

Pull approximately three inches of wire through the

opening. Color-coded, 18-gauge thermostat wire is

recommended.

Level the C7189U1005 for appearance only. Device

functions correctly even when not level.

Install C7189U1005 cover.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

•

The thermostat will display the temperature measured at

the sensor locations (internal thermostat sensor is

disabled). Sensors must be in square numbers (e.g., 4, 9,

C7189

M23523

16, and so on) and the displayed temperature will be an

OUT

average of the temperatures measured at each location.

The thermostat will display a 50-50 average of the

temperature measured at the thermostat location and the

average of the temperatures measured at the remote indoor

sensor locations. In this case, the thermostat sensor still

carries a 50% weighting of the displayed temperature.

OUT

Fig. 26. Wiring a single C7189U1005 Indoor Sensor.

Install Discharge Air Temperature Sensor

(Optional):

Prior to installing Discharge Air Temperature Sensor (DATS)

refer to the installation instructions included with the product for

more information on placement and wiring.

OUT

C7189

When using a DATS with network zoning the DATS will monitor

the duct air temperature and communicate with the thermostat

and will disable the heating and/or cooling if installer set high or

low temperature limits are reached.

When using a DATS with an Equipment Interface Module the

DATS is for testing only. When the installer is in any of the

Installer Tests pressing the “More” button will display the

temperature measured at the DATS. This allows the installer

to view the temperature of each stage of heating and or

cooling. The DATS will not be used for control and will not

disable heating or cooling based on duct air temperature.

OUT

C7189

Set Calendar and Time

Thermostat keeps current time and day for up to ten years

under normal use after the calendar is set.

When the thermostat is first powered, the display is ready to

set the calendar and time.

M23524

NOTE: Calendar can also be set in the Installer Setup.

Fig. 27. Wiring Multiple C7189U1005 Sensors.

Press the arrow keys to set the year, month and day.

Press the Done key.

If a remote indoor temperature sensor is installed, the

thermostat has several options for displaying the current indoor

temperature. This is configured in ISU 340. The thermostat can

display either the temperature measured at the thermostat

location, the sensor location, or a 50-50 average of both.

SET CURRENT DAY

SET MONTH

ONE REMOTE INDOOR SENSOR INSTALLED (OPTIONAL)

If one remote indoor temperature sensor is used, based on

configuration during installer setup, either of the following

options are available:

MM OO

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

CHANGE FILTER UV LAMP

•

The thermostat will display the temperature measured at

the sensor location (internal thermostat sensor is disabled).

The thermostat will display a 50-50 average of the

temperature measured at the thermostat location and the

remote indoor sensor location.

DONE

MULTIPLE REMOTE INDOOR SENSORS INSTALLED (OPTIONAL)

If more than one remote indoor sensor is used, based on

configuration during installer setup, either of the following

options are available:

USE ARROWS TO SET YEAR AND TIME

M22424

Press the arrow keys to set the current time.

Press the Done Key.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Press and release the System Key.

USE ARROWS TO SET YEAR AND TIME

THU

FAN

Inside

AUTO

SYSTEM

EM HEAT

Following

Schedule

OFF

COOL

Humidity

SCHED HOLD CLOCK SCREEN

DONE

M22425

M23498

Press and hold the two blank keys on either side of the

center blank key for approximately five seconds until

screen changes.

INSTALLER SETUP

Auto Discover is available when the TH9421C thermostat is

connected to an EIM. The EIM communicates information to

the thermostat. Thermostat settings can be specified using the

up and down arrow keys on the screen or set to Auto Discover.

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

CHANGE FILTER UV LAMP

Inside

Set

Using Auto Discover

SYSTE

Following

Schedule

Some Installer setups are defaulted to Auto Discover. If not

defaulted, the installer can change the option to Auto Discover,

however, it is always important that the installer verify that the

auto discovered values are correct for the system that is

present.

HEAT

OFF

Humidity

DONE

CANCEL

When using the thermostat with an equipment interface

module, Auto Discover will discover factory default settings

and will not receive communications as to proper system

settings. The equipment interface module is preprogrammed at

the factory as a one heat one cool product and the thermostat

will “auto discover” those settings. The equipment interface

module will be reprogrammed when the installer manually

changes the configuration in the installer set up. It is not

recommended to use Auto Discover with an equipment

interface module.

M23499

3. Release the two blank keys when the screen on the ther-

mostat matches the screen below.

When using the VisionPRO® IAQ thermostat with a W8835

zone panel, configure the zone panel, using the DIP switches

on the panel, for the proper system settings. Enter the installer

setup on each thermostat and assign zone numbers, and

change the system settings (ISU 172–180) to Auto Discover

(

E) then press the discover button on the zone panel. The zone

panel will then communicate those settings back to the

thermostats and the thermostats will automatically configure

the ISU settings in Auto Discover, again it is important to verify

that the auto discovered values are correct.

DONE

NOTE: When a VisionPRO® IAQ thermostat is being added

to an existing zoning system with T8635 Thermostats

the new VisionPRO® IAQ must be set up as the Zone

One Thermostat (master zone controller), and can

only be used with a W8835 zone panel.

M22442

Follow these steps to enter the Installer Setup:

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

See screen below to review how the thermostat keys are

used during Installer Setup. See Table 3–4 for the

Installer Setup Numbers and Settings.

ADVANCE TO NEXT

INSTALLER SETUP

INSTALLER

SETUP

NUMBER

CURRENT

SETTING

MON

WED

THU

FRI

SAT

SUN

DONE

PRESS TO EXIT

INSTALLER SETUP

CHANGE THE

CURRENT

SETTING

M22443

Press the Done key to exit the Installer Setup screen.

Table 3. Installer Setup Menu.

ISU

Parameter Installer Setup

Settings

Number

Name

(Factory Defaults Shown in Bold)

Not zoned

Zone number

Notes

Zone Number

Select zone number.

Zone 0 = not zoned

Zone 1 = master zone controller

Zone 2–9 = satellite thermostat

–9

Date (Year

Upper)

Select first two digits of current calendar year (2006 for

example) - (2001-2178 available).

USU

Date (Year

Lower)

01-99 Default = 06

Select last two digits of current calendar year (2006 for

example) - (2001-2178 available).

USU

Date (Month)

1-12

1-31

Select number that represents current calendar

month.

USU

Default = 06

Date (Day)

Select number that represents current calendar

date.

Default = 15

USU

Schedule Options 4

Seven-day programmable

Non-programmable

USU

Restore Energy

Star Schedule

Yes

USU

172

174

176

System Selection 1

Conventional

Heat Pump

Selection of a specific system setting will automatically

modify some default settings and/or hide other installer

setup options that follow.

Heat Only No Fan

Auto Discover

Number of Cool/

Compressor

Stages

none

Not shown if ISU172 = 3.

Conventional systems = number of cooling stages.

Heat Pump systems = number of compressor stages.

Auto Discover

Number of

none

Conventional systems = number of heating stages

(maximum of 3).

Heat Pump systems = number of auxiliary heat

stages (maximum of 2).

Conventional

Heat or Heat

Pump Aux Stages 3

Auto Discover

Fan Operation

Conventional

heat only

Gas or oil furnace equipment controls fan in

Only shown if ISU172 = 1 (conventional system).

Use 0 for fossil fuel systems (equipment controls fan).

Use 1 for electric systems (thermostat controls fan).

Use 2 if stage 1 is radiant heating and stage 2+ is a hot

water fan coil.

heating

Electric furnace—thermostat controls fan in

heating

Equipment controls stage 1; thermostat controls

stage 2+

Auto Discover

Reversing Valve

O/B

Changeover valve—O/B terminal is energized Only shown if ISU172 = 2.

in cooling

Changeover valve—O/B terminal is energized in

heating

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 3. Installer Setup Menu. (Continued)

ISU

Parameter Installer Setup

Settings

(Factory Defaults Shown in Bold)

Number

Name

Notes

Back-up Heat

Electric backup heat

Fossil fuel backup heat

Auto Discover

Only shown if ISU172 = 2 and ISU176 = 1 or greater.

Source Applies to 1

both Aux and

EmHeat

External Fossil

Fuel Kit

Thermostat controls backup heat

Only shown if ISU172 = 2 and ISU200 = 1.

External Fossil Fuel kit controls backup heat

CPH for 1st

Stage Cool/

Compressor

1-6

3—cph recommended for compressors

1, 2, 4, 5, 6—other cycle rate settings

Auto Discover

CPH for 2nd

Stage Cool/

Compressor

1-6

3—cph recommended for compressors

1, 2, 4, 5, 6—other cycle rate settings

Auto Discover

Only shown if ISU174 = 2.

CPH for 1st

Stage

Conventional

Heat or Auxiliary

1-12

1—1 cph used for steam and gravity

Only shown if ISU172 = 2 and ISU176 = 1 or higher.

Default varies based on types of heating.

3—3 cph used for hot water system and high

efficiency (90% or better) furnaces

5—5 cph used for standard fossil fuel forced air

(

less than 80% efficient) systems

—9 cph used for electric furnaces

, 4, 6, 7, 8, 10, 11, 12—other cycle rate settings

Auto Discover

CPH for 2nd

Stage

Conventional

Heat or 2nd

Stage Auxiliary

1-12

1—1 cph used for steam and gravity

Only shown if ISU176 = 2 or for Heat Pump systems

3—3 cph for hot water systems and high efficiency with 2 stages of Auxiliary Heat.

Default varies based on types of heating.

(90% or better) furnaces

5—5 cph for standard fossil fuel forced air (less

than 90% efficient) systems

—9 cph used for electric furnaces or electric

auxiliary heat for heat pump systems

, 4, 6, 7, 8, 10, 11, 12—other cycle rate settings

Auto Discover

CPH for 3rd

Stage Heat

1-12

1—1 cph used for steam and gravity

3—3 cph for hot water systems and high efficiency Default varies based on types of heating.

Only shown if ISU176 = 3.

(

90% or better) furnaces

—5 cph for standard fossil fuel forced air (less

than 90% efficient) systems

—9 cph used for electric furnaces or electric

auxiliary heat for heat pump systems

, 4, 6, 7, 8, 10, 11, 12—other cycle rate settings

Auto Discover

Continuous

Backlight

Backlight not on continuously. Thermostat

backlight comes on with each key press.

Backlight is on continuously.

If backlight is on continuously, it is low-intensity. Light

changes to full brightness after pressing any key.

USU

Changeover

Manual

Auto

Auto Changeover allows user to choose heat, cool, off

or auto. When set to Auto the thermostat will

automatically choose heat or cool based on room

temperature and heat/cool set points. Manual

changeover allows the user to manually toggle

between heat, cool and off.

Deadband

1.5 2°F 1.5°C

2.0 3°F 2.0°C

Only shown if ISU300 = 0. The deadband indicates the

minimum number of degrees that are allowed between

the heat and cool settings when in auto changeover.

For example, if the deadband is set to 3°F and the cool

setpoint is 75°F the warmest heat setpoint allowed

would be 72°F.

2.5 4°F 2.5°C

3.0 5°F 3.0°C

3.5 6°F 3.5°C

4.0 7°F 4.0°C

4.5 8°F 4.5°C

5.0 9°F 5.0°C

Note: degrees C is not same as degrees F

Temperature

Indication Scale

Fahrenheit temperature display

Celsius temperature display

USU

Daylight Saving

Disabled

Enabled (US 1987)

Enabled (US 2007)

Set to 0 in areas that do not follow daylight savings

time.

USU

Indoor Temp

Sensor

Thermostat location only

Indoor temperature sensors will display the

Remote indoor sensor(s) location(s) only

temperature at the sensor location or an average of

Average between thermostat and sensor locations two indoor temperature sensors, not including the

temperature sensor in the thermostat. The

temperature sensor in the thermostat is disabled when

using remote indoor temperature sensor(s).

Outdoor Temp

Sensor

None

Yes

Auto Discover

An outdoor temperature sensor is required for heat

pump compressor lockout (ISU350), heat pump

auxiliary lockout (ISU360), dual fuel heat pump

balance point (ISU360) and Humidification with Frost

Protection (ISU372).

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 3. Installer Setup Menu. (Continued)

ISU

Parameter Installer Setup

Settings

(Factory Defaults Shown in Bold)

Number

Name

Notes

345

Dual Fuel Heat

Pump Control

Balance point only

Balance point plus 2° droop

Balance point/auxiliary heat lockout plus 2° droop.

See Dual Fuel Heat Pump control on page 22.

346

Dual Fuel Heat

Disabled

See Dual Fuel Heat Pump control on page 22.

Pump Upstage to 30

30 minutes

45 minutes

60 minutes

75 minutes

Furnace Timer

Heat Pump

No heat pump compressor lockout

-15 5°F -15.0°C

-12 10°F -12.0°C

Only shown for heat pump applications with an

outdoor temperature sensor present.

Balance Point

(

also compressor

lockout)

5 -9.5 15°F -9.5°C

0 -6.5 20°F -6.5°C

Temperature

-4 25°F -4.0°C

-1 30°F -1.0°C

1.5 35°F 1.5°C

4.5 40°F 4.5°C

7 45°F 7.0°C

10 50°F 10.0°C

13 55°F 13.0°C

0 15.5 60°F 15.5°C

(

Show 1/2 degree C)

Heat Pump

Auxiliary Heat

Lockout

No heat pump auxiliary lockout

-15 5°F -15.0°C

-12 10°F -12.0°C

Only shown for heat pump applications with an

outdoor temperature sensor present.

Temperature

5 -9.5 15°F -9.5°C

0 -6.5 20°F -6.5°C

-4 25°F -4.0°C

-1 30°F -1.0°C

1.5 35°F 1.5°C

4.5 40°F 4.5°C

7 45°F 7.0°C

10 50°F 10.0°C

13 55°F 13.0°C

0 15.5 60°F 15.5°C

5 18.5 65°F 18.5°C

(

Show 1/2 degree C)

Discharge Temp

Sensor

None

Remote

Auto Discover

Zoning High

Temperature

Limit

160

160°F (71°C)

Disabled

Only Shown if ISU110 = 1 (Master Zone Controller)

and Discharge Temperature Sensor is available.

110–170 110°F to 170°F (43.5°C to 76.5°C)

Zoning Low

Temperature

Limit

160°F (71°C)

Disabled

Only Shown if ISU110 = 1 (Master Zone Controller)

and Discharge Temperature Sensor is available.

35-50 35°F to 50°F (1.5°C to 10°C)

Staging

110

110°F (43.5°C)

Disabled

Only Shown if ISU110 = 1 (Master Zone Controller)

and ISU174 = 2 or more. Must have Discharge

Temperature Sensor present.

Discharge

Temperature

High Limit

80-130 80°F to 130°F (26.5°C to 54.5°C)

Staging

55°F (13°C)

Only Shown if ISU110 = 1 (Master Zone Controller)

and ISU176 = 2. Must have Discharge Temperature

Sensor present.

Discharge

Temperature

Low Limit

Disabled

50-60 50°F to 60°F (10°C to 15.5°C)

Indoor Humidity

Sensor

Disabled

If there is a remote sensor installed and the setting is

either auto discover or “remote” the internal thermostat

humidity sensor is disabled. If set to “internal” the

internal thermostat sensor is presented on the screen.

If set to “disabled” the internal sensor and any remote

sensors are disabled, there will be no humidity

displayed and will have no humidification/

Internal—sensor in thermostat

Remote

Auto Discovered

dehumidification control.

372

Indoor

Humidification

Control

Off

Shown only if ISU370 = 1, 2 or E.

Humidify with no Frost Protection

Humidify with Frost Protection

Auto Discover

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 3. Installer Setup Menu. (Continued)

ISU

Parameter Installer Setup

Settings

(Factory Defaults Shown in Bold)

Number

Name

Notes

Hum Fan Action

Humidify only while fan or heat is on

Humidify will force fan on

Setting 0 will run the humidifier only during a call for

heat or if the fan is running.

Setting 1 will force the fan to run if there is a call for

humidification.

Humidify only when heat is on

Humidifier operates independent of fan

Setting 2 will humidify only during a call for heat.

Setting 3 assumes the humidifier has it own internal

fan and will not require the system fan or heat to be

operating during a call for humidification.

Dehumidification

Control

None

Option 1 uses dehum terminal as a normally closed

relay to wire to a low-speed fan terminal.

Dehumidify with Air Conditioning

Whole house Dehumidifier

Option 3 uses dehum terminal as a normally open

relay to wire to a whole-house dehumidifier.

Over-Cooling

Limit

0.5 1°F 0.5°C

1.0 2°F 1.0°C

1.5 3°F 1.5°C

Only shown if ISU379 = 1.

(

Show 1/2 degree C)

Dehumidification

Fan Action

System fan turns on with dehumidifier

Only shown if ISU379 = 3.

Dehumidifier operates independent of system fan

Southern

Dehumidification

Away Mode

Yes

Not shown if ISU379 = 0.

ISU 391-394 will only be shown if ISU390 = 1.

Southern

Fan Auto

Fan On

If ISU391 = 1 or 2 to help remove condensation from

the air handler and the A-coil, some humidity may be

re-introduced into the living space.

Dehumidification

Away Mode Fan

Setting

Fan Circulate

Southern

70-80 70°F–80°F

Default = 76°F

The air conditioner will be allowed to cool the living

space to this temperature to meet the humidity setting

that set in ISU394.

Dehumidification

Away Mode Low

Limit

Temperature

Setting

393

394

400

Southern

70-99 70°F–99°F

Default = 85°F

The A/C will maintain this temperature provided the

humidity setting is satisfied. This temperature setting

can not be set lower than the temperature set in ISU

392.

Dehumidification

Away

Temperature

Setting

Southern

55-70 55%–70% relative humidity

Set the desired humidity level to maintain within the

living space

Dehumidification

Away

Default = 65%

Dehumidification

Setting

Ventilation control 0

No ventilation

Ventilation on at all times

Ventilation on except during sleep period

If ISU300 = 0, ISU401-405 will not be shown.

401

402

403

404

Number of

bedrooms

1-6

1–6 bedrooms

Default = 2

Total house

Sq. Ft.

10-50 1000–5000 sq. ft. in increments of 100

Default = 1000 sq. ft.

Ventilation CFM 30-195 30–195 CFM in increments of 5

Default = 160 CFM

Max ventilation

percentage limit

30-60 30%–60%

The thermostat will determine if ventilation is meeting

ASHRAE standard 62.2. The display will show a P

above the setup number if the setting passes the

ASHRAE standard, or F if it does not. Best practice is

to move the setting down until F is displayed, then

move up one setting to the minimum passing value.

Default = 50%

unlimited

Ventilation Fan

Action

Vent on will force fan on also

Vent will not force fan ON

Ventilation in

High Humidity

Off

Only shown if ISU372 and ISU400 are not set to 0.

When set to On will use ventilation to remove humidity

when thermostat is in the heat mode.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 3. Installer Setup Menu. (Continued)

ISU

Parameter Installer Setup

Settings

(Factory Defaults Shown in Bold)

Number

Name

Notes

Furnace Filter

Change

Reminder

Disabled

USU

10 R.T. Days

30 R.T. Days

60 R.T. Days

90 R.T. Days

120 R.T Days

180 R.T. Days

270 R.T. Days

365 R.T. Days

30 C Days

60 C Days

90 C Days

120 C Days

180 C Days

365 C Days

Auto Discover

Furnace filter

Counts runtime Heat and Cool

reminder run time 1

equipment counts

Counts runtime Cool only

Humidifier Pad

Replacement

Reminder

Disabled

Display will show Calendar Days if ISU372 = 0; Run

Time Days if ISU372 = 1 or 3.

USU

90 C Days or 30 R.T. Days

180 C Days or 60 R.T. Days

365 C Days or 90 R.T. Days

Auto Discover

UV Lamp

Replacement

Reminder

Disabled

USU

365 Days

730 Days (2 years)

Auto Discover

Adaptive

Intelligent

Recovery

Conventional

Adaptive

See Temperature Recovery on page 31.

USU

Number of

Periods

2 Periods

4 Periods

2 periods = Wake and Sleep.

4 periods = Wake, Leave, Return, and Sleep.

USU

Min Compressor

Off Time

Off

1 minute

2 minutes

3 minutes

4 minutes

5 minutes

Heat Temp

40-90 40°F–90°F (Show 1/2 degree C)

Range Stops

Default = 90°F

Cool Temp

Range Stops

60-99 60°F–99°F (Show 1/2 degree C)

Default = 60°F

Clock Format

12 Hour

24 Hour

USU

Extended Fan on 0

time Heat (Blower 30

Off Delay Heat) 60

Off

30 seconds

60 seconds

90 seconds

120 seconds

Extended Fan on 0

time Cool (Blower 30

Off Delay Heat) 60

Off

This can be used to remove condensation from A-coil;

however, could re-introduce humidity into the living

space.

30 seconds

60 seconds

90 Seconds

120 Seconds

Keypad Lockout

Unlocked

Partial Locked

Full Locked

USU

Temp Control

Heat

Less Aggressive temp control (may cause temp

undershoot)

Standard (recommended)

More Aggressive temp control (may cause temp

overshoot)

Temp Control

Cool

Less Aggressive temp control (may cause temp

undershoot)

Standard (recommended)

More Aggressive temp control (may cause temp

overshoot)

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 3. Installer Setup Menu. (Continued)

ISU

Parameter Installer Setup

Settings

(Factory Defaults Shown in Bold)

Number

Name

Notes

700

Temperature

Display Offset

-3

-2

-3°F -1.5°C

-2°F -1°C

-1°F -.5°C

0°F 0. °C — (no difference in displayed

temperature and actual room temperature)

1°F .5°C

2°F 1°C

3°F 1.5°C

Humidity Display -5

-5%

-4%

-3%

-2%

-1%

Offset

-4

710

Restore Factory

Defaults

Yes

Restoring factory defaults will re-set installer setup and

programming.

INSTALLER SYSTEM TEST

SYSTEM TEST

NUMBER

SYSTEM STATUS

NUMBER

UP ARROW

TURNS THE

SYSTEM ON

Use the Installer System Test to test the heating, cooling and

fan (and emergency heat for heat pump systems).

CAUTION

Equipment Damage Hazard.

Minimum compressor off time is bypassed during

Installer System Test

Avoid cycling compressor quickly.

DONE

How to Use the Installer System Test

The Installer Test is part of the Installer Setup Menu.

Enter the Installer System Test by entering the Installer

Setup.

Note that the test appears at the end of the Installer

DONE KEY

EXITS INSTALLER ADVANCES TO

SYSTEM TEST

NEXT SYSTEM

TEST NUMBER

UP ARROW KEY

DOWN ARROW

TURNS THE

SYSTEM OFF

M22428

Setup Numbers.

See Fig. 28 to review how the thermostat buttons are

used during the Installer System Test. See Table 6 for

available Installer System Tests.

Fig. 28. Review thermostat buttons used during Installer

System Test.

If installed with a Discharge Air Temperature Sensor

(

ISU365=1) press the “MORE” button to view the dis-

charge temperature, and press Cancel to return to the

Installer test screen.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Installer System Tests

Table 4. Installer System Test.

System Test Number

Test 1

Test Type

ISU Value

System Status Number and Description

Off

Cool Stage 1

Installer Test Cool

Cool Stages 1 & 2

Test 2

Test 3

Installer Test Fan

Installer Test Heat

Off

Fan On

Off

Heat Stage 1

Heat Stages 1, 2

Heat Stages 1,2,3

Heat Stages 1,2,3,4

Test 4

Emergency Heat Test

Off

AUX Heat Stage 1

AUX Heat Stages 1 and 2

Test 5

Test 6

Test 7

Err

Installer Test Humidifier

Installer Test Dehumidifier

Installer Test Ventilator

Diagnostic Recall

Off

Humidifier On

Off

Dehumidifier On

Off

Ventilator On

00-99

See “Communication Error Codes” on page 34

Press the Next button to go to the beginning of the Installer Setup or press the Done button to exit the Installer System Test.

When VisionPRO® IAQ is used in a zoning system you must exit the installer test on one thermostat before entering the installer

test on another thermostat.

OPERATION

Thermostat Display

TUE

INSIDE TEMPERATURE

SHOWS THE CURRENT INSIDE

TEMPERATURE

Thermostat Keys

SHOWS CURRENT DAY

OF THE WEEK

SYSTEM

DOWN ARROW

LOWERS TEMPERATURE

SETTING

FAN

SET TO

SELECTS EM.

SHOWS FAN

SETTING

TEMPERATURE

HEAT/HEAT/OFF/COOL

SHOWS THE

CURRENT SET

TEMPERATURE

FAN

UP ARROW

RAISES

TEMPERATURE

SETTING

SELECTS

ON/AUTO/CIRC

FAN

TUE

Inside

Set To

AUTO

FAN

Inside

Set To

Following

Schedule

AUTO

SYSTEM

EM HEAT

HEAT

OFF

COOL

Following

Schedule

SYSTEM

HEAT

Humidity

COOL

SCHED

HOLD

CLOCK SCREEN

Humidity

SCHED

HOLD

CLOCK SCREEN MORE

SYSTEM

TIME

FOLLOWING

SCHEDULE

SHOWS

DISPLAY CURRENT

TIME OF DAY, HOLD

TIME REMAINING OR

NUMBER OF VACATION

DAYS REMAINING

SCHED

CLOCK

SETS THE

TIME

FORWARD

OR BACK

CURRENT

SYSTEM

POSITION

SHOWS THE

ENTERS

SCHEDULING

MODE

SHOWS ADDITIONAL

ACCESSORY AND

MAINTENANCE

OPTIONS

THERMOSTAT IS

FOLLOWING THE

PROGRAMMED

SCHEDULE

HOLD

M23501

SCREEN

SETS A PERMANENT

HOLD AND ACTIVITIES

VACATION HOLD

LOCKS OUT THE

SCREEN TO ALLOW

FOR CLEANING

M23500

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Press the More key until the inside humidity level set-

point is shown.

Use Up and Down arrow keys, located to the right of the

humidity setpoint, to set desired humidity level.

Press Done key.

System and Fan Settings

System

The System key selections vary based on your heating and/or

cooling system type.

Control Dehumidification Level

Heat — Thermostat controls the heating system.

Off — Both heating and cooling systems are off.

Cool — Thermostat controls the cooling system.

The VisionPRO IAQ Touchscreen Thermostat reads the

inside humidity level and allows for a dehumidification setting,

and can be set to dehumidify using the air conditioner or a

whole house dehumidifier.

Auto — Thermostat automatically changes between heating

and cooling operation, depending on indoor temperature.

CURRENT

INDOOR

Em. Heat — Emergency heat cycles to maintain temperature.

Compressor is locked out and auxiliary heat turns on as

needed.

HUMIDITY

Fan

The Fan key selections vary based on the heating and/or

cooling system type.

Inside

DEHUMIDIFIER

On — Fan runs continuously. Use this setting for improved air

circulation or for more efficient central air cleaning.

Auto — fan follows the fan program schedule.

Circ — fan runs randomly approximately 35% of the time. Use

this setting for improved air circulation or for more efficient

central air cleaning when you do not want the fan running

continuously.

Humidity

DONE

CANCEL

DEHUMIDIFIER

SETTING

HUMIDITY SET

POINT

Control Humidification Level

(AUTO/OFF)

M23496

The VisionPRO^®IAQ Touchscreen Thermostat reads the

inside humidity level and allows for a humidification setting with

or without frost protection. Humidification will only take place

when the thermostat is in Heat mode or in Auto mode when the

previous call was a call for heating.

With Air Conditioner

The set range for dehumidification is 40 to 80%, and can be set

in 5% increments. The thermostat must be in Cool mode or

Auto mode when the previous call was a call for cooling.

WITH FROST PROTECTION

Controlling humidification with frost protection requires an

outdoor temperature sensor. The Frost Index (scale 1–10) will

limit the amount of humidity added to the air based on outdoor

temperature, with 1=most dry and 10=most humid. This

prevents frost from accumulating on windows.

Inside

DEHUMIDIFIER

Inside

HUMIDIFIER

DONE

CANCEL

M23514

Dehumidifying in this manner runs the air conditioner longer

than simply cooling the house would require, and can be set to

run 1, 2, or 3°F below the temperature setpoint. This feature is

called Dehumidification Droop Control.

Humidity

DONE

CANCEL

M23518

NOTE: You must use this setting if:

WITHOUT FROST PROTECTION

The frost setpoint is not displayed, but a humidity setpoint can

still be set.

—

No powered, whole house dehumidifier is present,

and

The system uses the air conditioner as the

dehumidifier.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

DEHUMIDIFICATION DROOP CONTROL

In extremely high humidity conditions, the thermostat keeps

the air conditioner running (energizing Y/Y2 and G) for up to

°F below the temperature setpoint. It does this while trying to

achieve the desired humidity setpoint and balancing that with

the temperature setpoint. The thermostat controls up to 3° F

below the temperature setting until either the humidity setpoint

is satisfied or conditions change.

With Whole House Dehumidifier

Controls humidity levels in the house by dehumidifying without

the use of the air conditioner. This setting requires a dedicated

unit for dehumidification. Dehumidification with a whole house

dehumidifier will take place when the thermostat is in the Cool,

Off, Auto, Heat or Em.Heat modes. If the system is installed

with a whole house humidifier, dehumidification with a whole

house dehumidifier will only take place when the thermostat is

in Cool, Off or Auto modes (Auto only if the previous call was a

call for cooling).

DONE

M23520

Ventilation occurs two ways:

AUTOMATIC

Uses installer setup to determine amount of ventilation

required based on house and equipment size. To disable

automatic ventilation, switch the ventilation setting to Off. The

user can still use the timer to request ventilation.

When controlling a whole-house dehumidifier the user can

toggle between auto (dehumidify when needed based on

setpoint and current humidity level) and off (see Fig. 29).

ON DEMAND

User can also set a vent timer that will circulate fresh air into

the home for a set period of time from 20 to 180 minutes in 20-

minute increments. The vent timer is enabled whether

ventilation is set to “Auto” or “Off.”

Inside

DEHUMIDIFIER

Humidity

DONE

CANCEL

M23515

VENT

Fig. 29. Display when controlling a whole-house

dehumidifier.

Minutes

Press the More key until the inside humidity percent and

dehumidification setpoint are shown.

Use Up and Down arrow keys, located to the right of the

dehumidifier setpoint, to set desired humidity level for

dehumidification in the summer.

DONE

CANCEL

M23519

VENTILATION IN HIGH HUMIDITY CONDITIONS (SETUP FUNCTION 0406)

If Ventilation Control is available (setup function 0400 set to 1

or 2), this allows the ventilation equipment to turn on if the

humidity rises approximately 10% above the RH setting in

heating mode to exhaust the extra humidity.

Press Done key.

Ventilation Control

Ventilation setup options include ISUs 400, 401, 402, 403, and

04. Combined, these will determine a percentage of

maximum ventilation limit. The thermostat will calculate

whether or not this level of ventilation meets ASHRAE

standard 62.2. If ASHRAE 62.2 is met a P will appear in the

display above the setup number. If ASHRAE 62.2 is not met an

F will appear in the display above the setup number.

HEAT PUMP OPERATION

Heat Pump LED Indication

A red LED indication is located in the upper right corner of the

thermostat. It is only visible when lighted.

Passing ASHRAE 62.2 is only applicable when vent is running.

For example, if installer has set to not vent during sleep period,

ASHRAE 62.2 would be met at all times except during sleep

period.

When the L terminal is wired to an equipment monitor, the LED

signals when a check or fail signal is sent to the thermostat

from the system. This is operational in the Heat, Off, Cool or

Auto positions.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Heat Pump Emergency Heat LED Indication

Balance Point/Auxiliary Heat Lockout Plus 2° Droop

(ISU 345 = 2)

The thermostat uses a red LED indicator that lights when the

thermostat is in the Emergency Heat mode. The LED is located

in the upper right corner of the thermostat. It is visible only

when on.

When the outdoor temperature is above the Auxiliary Heat

Lockout Temperature only the compressor operates; below the

balance point temperature (setup function 0360) only the fossil

fuel operates. Between the balance point temperature and

auxiliary heat lockout temperature the compressor will operate.

However, the fossil fuel will turn on if the room temperature

droops approximately 2°F below the temperature setting,

compressor will be disabled.

Heat Pump Temperature Lockouts

Dual Fuel Heat Pump and Outdoor Temperature

Sensor

In this operation, there is no external fossil fuel kit (dual fuel kit)

installed; the thermostat controls this function.

COMPRESSOR ONLY

AUX.

Choose correct heat pump application in Installer Setup

Number 0172.

Choose Fossil Fuel Option as the backup heat source

in Installer Setup Number 0200.

Choose No External Fossil Fuel Kit Option is control-

ling back up heat in Installer Setup Number 0210.

Choose Outdoor Temperature Sensor for Heat Pump

Temperature Lockouts in Installer Setup Number 0342.

Choose appropriate Balance Point Temperature in

Installer Setup Number 0350.

LOCKOUT

COMPRESSOR+2 °F

DROOP UPSTAGE TO

FURNACE

BALANCE

POINT

FURNACE ONLY

M23497

Fig. 31. Balance Point with Auxiliary Lockout Temperature.

Dual Fuel Heat Pump Control

AUXILIARY LOCKOUT FOR ELECTRIC HEAT BACKUP

Heat Pump systems with electric heat backup can select a

compressor lockout temperature (function 0350) and/or

auxiliary heat lockout temperature (function 0360). When the

outdoor temperature is below the compressor lockout

temperature, only the auxiliary heat operates. When the

outdoor temperature is between the compressor and auxiliary

lockout temperatures, both the compressor and auxiliary heat

can operate.

Balance Point Only (ISU345 = 0)

NOTE: System must have an outdoor temperature sensor.

When the outdoor temperature is above the selected balance

point temperature, only the compressor operates and the fan

(G terminal) energizes when the thermostat calls for heat. See

Fig. 30. When the outdoor temperature is below the selected

balance point temperature, only the fossil fuel (auxiliary heat)

operates and the fan (G terminal) does not energize when the

thermostat calls for heat.

NOTE: System must have an outdoor temperature sensor.

Heat Pump with Electric Auxiliary (Backup) Heat and

Outdoor Temperature Sensor

Choose correct heat pump application in Installer Setup

Number 0172.

COMPRESSOR ONLY

BALANCE

POINT

2. Choose Electric as Auxiliary (Backup) Heat Source in

Installer Setup Number 0200.

3. Choose Outdoor Temperature Sensor in Installer

Setup Number 0342.

Choose Compressor Lockout Temperature in Installer

Setup Number 0350.

FOSSIL FUEL ONLY

Choose Auxiliary Lockout Temperature in Installer

Setup Number 0360.

M22441

Fig. 30. Dual Fuel Heat Pump Operation in Heat mode with

Balance Point Set.

NOTE: There is a 5°F deadband between the Compressor

and Auxiliary Heat Lockout Temperatures.

Balance Point Plus 2° Droop (ISU345 = 1)

Operation in Heat Mode

The fossil fuel will turn on when the outdoor temperature is

above the balance point if the room temperature droops

approximately 2 degrees below the temperature setting, and

the compressor will be disabled.

When the outdoor temperature is below the Compressor

Lockout Temperature, only the Auxiliary Heat operates.

When the outdoor temperature is above the Auxiliary Lockout

Temperature, only the Compressor operates. See Fig. 32.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Operation in Emergency Heat Mode

COMPRESSOR ONLY

Once the thermostat is placed into the Emergency Heat mode,

the compressor and auxiliary lockout features are turned off. In

the Emergency heat mode, the compressor is locked out. The

first stage of heat is whatever is connected to the AUX

terminal. The second stage of heat is connected to the AUX2.

terminal.

AUXILIARY

LOCKOUT

TEMPERATURE

BOTH COMPRESSOR AND

AUXILIARY HEAT

COMPRESSOR

LOCKOUT

TEMPERATURE

AUXILIARY ONLY

M19950

Operating Sequence

The thermostat energizes specific terminal(s), depending on

the demand for heating, cooling or fan. The thermostat screen

shows the time, inside temperature, system and fan selections.

Additional indicators are shown when the heating, cooling or

fan is energized. See Table 5 and 6 for specification

information.

Fig. 32. Heat Pump Operation with Lockout

Temperatures Set.

When the outdoor temperature is between the two

temperatures, both the Compressor and Auxiliary Heat operate.

Table 5. Sequence of Operation for Conventional Systems.

Fan Setting Call for Action Energize Terminals

Auto None

System Setting

Off

Screen Message

None

Cool or Auto

Auto

None

Y, G

None

Stage 1 Cooling

Cool On

Stage 1 and Stage 2 cooling

Y, Y2 , G

Heat or Auto

Auto

None

_W₁_,_Ga

None

Stage 1 heating

Heat On

Heat or Auto

Auto

Stage 1 and Stage 2 heating

Heat On

W1, W2 , G

Stage 1, Stage 2 and Stage 3 heating

W1, W2 , W3 , G

G energizes only if Installer set up number 180 is set to Option 1 (Electric Heat).

If installer setup (ISU174) is configured for two stages of cooling.

If installer setup (ISU 176) is configured for two or more stages of heating.

If installer setup (ISU 176) is configured for three stages of heating.

G energizes only if Installer set up number 180 is set to Option 1 (Electric Heat) or 2 (Hot water coil).

Table 6. Sequence of Operation for Heat Pump Systems.

System Setting Fan Setting

Call for Action

Energize Terminals

Screen message

Off

Auto

none

_O_/_Ba

_Y_,_G_,_O_/_Ba

None

Cool or Auto

Heat or Auto

none

None

Stage 1 cooling

Cool On

None

Stage 1 and Stage 2 cooling

none

Y, Y2 , G, O/B

_O_/_Ba

_Y_,_G_,_O_/_Ba

Stage 1 heating

Heat On

Aux Heat On

a Aux Heat On

Stage 1 and Stage 2 heating

Stage 1, Stage 2 and Stage 3 heating

Stage 1, Stage 2, Stage 3 and Stage 4 heating

None

Y, Y2 , G, O/B

Heat or Auto

_E_m_._H_e_a_tb

c,f

Y , Y2 , AUX , G, O/B

c,f

Y , Y2 , AUX , AUX2 , G, O/B

_O_/_Ba

None

Stage 1 Heating

Aux Heat On

AUX , G, O/B

Stage 1 and Stage 2 heating

AUX , AUX2 , G, O/B

Configure O/B in Installer Setup. Based on last piece of equipment called (cooling = O or Heating = B).

Red LED is on. See LED indication section for more details (page 21).

If installer setup (ISU 174) is configured for 2 compressor stages.

If installer setup (ISU 176) is configured for one or more stages of Auxiliary Heat.

If installer setup (ISU 176) is configured for two stages of Auxiliary Heat.

If thermostat is controlling backup heat, see temperature lockout section (page 22).

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 7. Indoor Air Quality Operation.

Last call

Energize

terminals

System Setting

Auto

Call For Action

Heat

Cool

Humidification

_H_U_M₁_a_n_d_H_U_M₂_C_l_o_s_ea

_N_o_t_h_i_n_gb

_N_o_t_h_i_n_ga

_D_H_M₁_a_n_d_D_H_M₂_c_l_o_s_ee

_D_H_M₁_a_n_d_D_H_M₂_o_p_e_nc _Y_c_a_n_d_Gc

None

Auto

Dehumidification

None

Auto

Ventilation

VNT1 and VNT2 Close

None

Heat or Em.Heat

Humidification

Dehumidification

HUM1 and HUM2 Close

_V_N_T₁_a_n_d_V_N_T₂_C_l_o_s_ed

Heat or Em.Heat

Cool

Ventilation

VNT1 and VNT2 Close

_N_o_t_h_i_n_ga

None

Humidification

Cool

Dehumidification

Ventilation

_D_H_M₁_a_n_d_D_H_M₂_c_l_o_s_ee

_D_H_M₁_a_n_d_D_H_M₂_o_p_e_nc _Y_c_a_n_d_Gc

None

VNT1 and VNT2 Close

None

Humidification only operates in heating or when last call was for heating.

Dehumidification only operates in cooling or when last call was for cooling.

Must be set up in installer setup (ISU 379) for dehumidification with air conditioning.

Installer setup (ISU 406) must be setup for Ventilation in high humidity or nothing will happen.

Only with whole house dehumidifier.

Multi-Stage Heat and Cool Control

In a multi-stage system, while maintaining setpoint, several

factors affect when the next stage energizes, such as load

conditions, environmental conditions, P+I control, and home

insulation. The next stage energizes when the thermostat

senses the previous stage is running at 90% capacity. This

operation is droopless control.

TUE

CHANGE FILTER UV LAMP HUMIDIFIER PAD

Inside

Set To

SYSTEM

EM HEAT

Following

Schedule

OFF

COOL

User Setup

Humidity

Follow these steps to enter the User Setup:

DONE

CANCEL

Press and release the System key.

M23503

THU

Release the center blank key when the screen on the

thermostat matches the screen below.

FAN

Inside

AUTO

SYSTEM

EM HEAT

Following

Schedule

OFF

COOL

Humidity

SCHED HOLD CLOCK SCREEN

M23502

DONE

Press and hold the center blank key for approximately

five seconds until the screen changes.

M22440

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

See the screen below to review how the thermostat keys

are used during the User Setup. See Table 8 for the User

Setup numbers and settings.

Table 8. User Setup Menu. (Continued)

User

Setup User Setup

No. Name

Settings

ADVANCE TO NEXT

USER SETUP

NUMBER

500 Furnace Filter

Change

Disabled

10 R.T. Days

30 R.T. Days

60 R.T. Days

90 R.T. Days

120 R.T Days

180 R.T. Days

270 R.T. Days

365 R.T. Days

30 C Days

CURRENT

SETTING

Reminder

MON

WED

THU

FRI

SAT

SUN

60 C Days

90 C Days

120 C Days

180 C Days

365 C Days

Auto Discover

DONE

10 Humidifier Pad 0

Disabled

Replacement

Reminder

90 C Days

180 C Days

365 C Days

Auto Discover

PRESS TO EXIT

USER SETUP

CHANGE THE

CURRENT

SETTING

20 UV Lamp

Disabled

Replacement

Reminder

365 Days

M19922

730 Days (2 years)

Auto Discover

Press the Done key to exit the User Setup screen.

30 Adaptive

Conventional

Adaptive

Intelligent

Recovery

Table 8. User Setup Menu.

User

Setup User Setup

No. Name

540 Number of

Periods

2 Periods

4 Periods

Settings

40 Clock Format 12

12 Hour

24 Hour

20 Date (Year

Upper)

670 Keypad

Lockout

Unlocked

Partial Locked

Full Locked

30 Date (Year

Lower)

01-99 Default = 06

40 Date (Month) 1-12 Select number that represents current

calendar month.

Default = 06

PROGRAMMING

150 Date (Day)

1-31 Select number that represents current

calendar date.

Default = 15

Preprogrammed Energy Star Settings

60 Schedule

Options

Seven-day programmable

Non-programmable

Table 9 shows default program settings. Visit the Energy Star

web site at www.energystar.gov for additional education and

resources on programmable touchscreen thermostats.

65 RestoreEnergy 0

Yes

Star Schedule

80 Continuous

Backlight

Backlight not on continuously.

Thermostat backlight comes on with

each key press.

Backlight is on continuously.

20 Temperature

Fahrenheit temperature display

Table 9. Energy Star Default Program Settings.

Setpoints

Indication

Celsius temperature display

Scale

Schedule

Period

Fan

30 Daylight Saving 0

Disabled

Enabled (US 1987)

Enabled (US 2007)

Time

Heat

Cool

Setting

Wake

Leave

Return

Sleep

6:00AM 70°F (21°C) 78°F (25.5°C) Auto

8:00AM 62°F (16.5°C) 85°F (29.5°C) Auto

6:00PM 70°F (21°C) 78°F (25.5°C) Auto

10:00PM 62°F (16.5°C) 82°F (28°C) Auto

00 Ventilation

control

No ventilation

Ventilation on at all times

Ventilation on except during sleep

period

Program Heating and Cooling Schedule

Your thermostat can control up to four different schedule

periods per day:

Wake—Period when you awaken and want your home at a

comfortable temperature.

Leave—Period when you are away from home and want an

energy-saving temperature.

Return—Period when you return home and want your home

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

back to a comfortable temperature.

Sleep—Period when you are asleep and want an energy-

saving temperature.

MON

TUE

WED

THU

FRI

SAT

SUN

OK TO PICK MULTIPLE DAYS

FAN

NOTE: Schedule times are in 15-minute intervals.

HEAT

AUTO

CIRC

Edit Schedule

CANCEL

PERIOD

Press Sched key.

COOL

FRI

FAN

Inside

Set

DONE

WAKE

LEAVE RETURN SLEEP CANCEL

M19955

AUTO

Following

SYSTEM

Schedule

Press Wake key. Once pressed, Wake flashes to show it

is selected.

Press Up and Down keys to modify time and heat and

cool temperatures from this screen.

HEAT

Humidity

SCHED

HOLD

CLOCK SCREEN

NOTE: The Fan setting can be programmed for On, Auto, or

Circ for each period selected. See Fan Schedule sec-

tion for more information.

M23504

Press Leave key and repeat step 5.

Press Return key and repeat step 5.

Press Edit key.

8. Press Sleep key and repeat step 5.

When complete, press Done key. “Saving Changes”

appears on the screen to indicate changes are being

saved to the day(s) modified.

MON

TUE

WED

THU

FRI

SAT

SUN

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

FAN

Inside

Set To

HEAT

MON

TUE

WED

THU

FRI

AUTO

CANCEL

PERIOD

Following

Schedule

SYSTEM

EM HEAT

HEAT

OFF

SAVING

CHANGES

COOL

AUTO

SC HH EE DD

EDIT

H OO LL DD

WAKE

CLOCK SCREEN

LEAVE RETURN SLEEP CANCEL

DONE

M22553

M19956

It is OK to pick multiple days. Select any combination of

days to edit. These days are scheduled with the same

times and temperatures. Check marks appear next to

days selected.

NOTE: To set a Program Schedule for the remaining days of

the week, repeat steps 1–9. Example: If Mon–Fri was

selected first, go back and repeat steps 1–9 for Sat

and Sun.

0. To exit schedule without saving changes, press Cancel

key any time.

Cancel a Schedule Period

Press Sched key.

Press Edit key.

Select the Day(s) of the week desired.

Press schedule period you want to cancel (Wake, Leave,

Return or Sleep). Once selected, the period flashes.

Press Cancel Period key.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Fan Control

MON

TUE

WED

THU

FRI

SAT

SUN

If the Fan program is scheduled, Auto is shown and any

programmable mode that is set; for example, if during Wake

period, Fan is set to Auto, only Auto is shown in the Fan area.

However, if during the Wake period, fan is scheduled to On,

both Auto and On are shown. Auto indicates fan is running its

schedule; On indicates Fan schedule is set to On.

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

FAN

Inside

Set To

HEAT

AUTO

CANCEL

PERIOD

Following

Schedule

SYSTEM

EM HEAT

HEAT

OFF

THU

COOL

AUTO

FAN

Inside

Set

SCHED

H OO LL DD

WAKE

CLOCK SCREEN

LEAVE RETURN SLEEP CANCEL

AUTO

DONE

M22446

Following

Schedule

SYSTEM

HEAT

The time, temperature(s) and fan setting disappear. The

bar above the selected period is removed, indicating the

scheduled period was cancelled.

COOL

Humidity

NOTE: To reinstate a schedule period, press arrow keys to

set desired time and temperatures.

SCHED

HOLD

CLOCK SCREEN

M23505

MON

TUE

WED

THU

FRI

SAT

SUN

OK TO PICK MULTIPLE DAYS

Table 10. Fan Program Operation and Screen Status.

Fan

FAN

HEAT

Fan

Program

Schedule

Call

for

Action

Status

shownon

Screen

Fan

Setting

Energize

Terminal

Auto

None

Fan

None

Auto

COOL

Auto/On

Auto/Circ

Circ

None

Fan

None

DONE

WAKE

LEAVE RETURN SLEEP CANCEL

M19957

Press Done key.

Manual Override of Fan Schedule

Auto—fan is automatically following the Fan schedule (choices

are Auto, On or Circulate).

Fan Schedule

Press Fan key while in the Scheduling Screen to program the

System Fan. Choices available from the Scheduling Screen:

Auto (default position)—fan runs with equipment.

Programmable for all schedule periods (Wake, Leave, Return

and Sleep).

On—overrides Fan schedule. Fan is continuously On.

Circ—overrides Fan schedule. Fan circulates randomly for

approximately 35% of time until the Auto position is selected.

On—fan runs continuously (programmable for all schedule

periods).

Circ—fan runs randomly for approximately 35% of schedule

period (programmable for all schedule periods).

Table 11. Manual Override of Fan Schedule Operation.

Screen

Fan

Message

Under

Fan

Schedule

Override

Setting

Call

for

Action

Fan

Setting

Energize

Terminal

MON

TUE

WED

THU

FRI

SAT

SUN

Setting

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

Auto

Fan

None

Fan

—

Circ

—

FAN

Inside

Set To

Circ

_A_u_t_oa

None

HEAT

AUTO

CANCEL

PERIOD

Following

Schedule

—

SYSTEM

EM HEAT

HEAT

Circ

None

Circ

OFF

COOL

Circ

Fan

—

Circ

—

AUTO

_A_u_t_oa

—

Circ

SCHED

H OO LL DD

WAKE

CLOCK SCREEN

LEAVE RETURN SLEEP CANCEL

DONE

Circ

Fan

M22447

^aAuto Override resumes the Fan Program in each schedule

period (Wake, Leave, Return and Sleep)

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Press the Cancel or Sched key to cancel “Hold

Temperature Until” and resume schedule.

OPERATE VISIONPRO IAQ

NOTE: Once “Hold Temperature Until” time is reached, the

thermostat shows “Following Schedule” on the screen

to indicate that “Temporary Hold” has ended.

Set Time

Press Clock.

Use arrows to set current time.

PERMANENT HOLD

Permanent Hold changes the temperature setting until

Permanent Hold is cancelled.

TUE

Press Hold key. “Permanent Hold” appears on the

screen.

Press Up or Down arrow next to the temperature you

want to set during “Hold.”

TUE

FAN

Inside

Set To

DONE

CANCEL

M19958

AUTO

SYSTEM

Press Done key.

IMPORTANT

COOL

Permanent

Hold

Humidity

CLOCK SCREEN

The current day of the week should already be set

correctly. If not, see Installer Setup to set the day.

SCHED HOLD

CANCEL

M23507

Set Temperature Overrides

The thermostat has four temperature override options: Hold

Temperature Until, Permanent Hold, Vacation Hold, and

Southern Dehumidification Away Setting.

Press Cancel key to cancel “Permanent Hold” and

resume the schedule.

VACATION HOLD

HOLD TEMPERATURE UNTIL (TEMPORARY HOLD)

Holds temperature temporarily until the next scheduled period

time or until the time the user sets.

Changes temperature setting for a designated number of days.

Press the Up and Down arrow keys to set the desired

temperature while away on vacation. Notice that “Hold

Temperature Until” time is shown on the screen. (This is

the time the Vacation Hold override expires after the

number of days ends.)

Press Up or Down arrow next to the temperature you

want to adjust. “Hold Temperature Until” time appears on

the screen. The Hold Temperature Until time defaults to

the start time of the next scheduled period.

Press Hold key twice. Screen shows “Hold Temperature

Until” one day.

Press Up and Down arrow keys to change the number of

Days you desire thermostat to override the schedule.

NOTE: The Time Up and Down arrows are shown for approx-

imately seven seconds. Pressing on the screen time

(

where the Hold Temperature Until time is shown)

NOTE: Days Up and Down arrows appear for approximately

seven seconds. Pressing just below Hold Tempera-

ture Until on the screen allows the Days Up and Down

arrows to reappear.

allows the arrows to reappear.

Press Up or Down arrow next to the Time key to set

desired time for the thermostat to resume schedule.

TUE

THU

FAN

Inside

Set

FAN

Inside

Set To

AUTO

SYSTEM

Hold Temperature

Until

HEAT Hold Temperature

OFF

COOL

Until

COOL

DAYS

Humidity

CLOCK SCREEN

Humidity

SCHED

HOLD

SCHED

CLOCK SCREEN

CANCEL

M23506

CANCEL

M23508

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

To cancel the Vacation Hold override early, press the

Cancel key.

4. Press the Done key to return to the Home Screen and

normal operation.

NOTE: When the number of days of Vacation Hold expires,

the screen shows “Following Schedule” to indicate

that Vacation Hold has ended.

Screen Locks

TUE

SOUTHERN DEHUMIDIFICATION AWAY SETTING

SCREEN LOCKED

FAN

Southern Dehumidification Away Setting is an option that only

appears if ISU number 390 is set to yes. It can be used to

maintain the desired humidity level and temperature in the

living space while away for extended periods of time. See ISU

Numbers 390–394 for more information.

Inside

Set

AUTO

Following

Schedule

SYSTEM

COOL

FRI

Humidity

FAN

SCHED

HOLD

CLOCK SCREEN

Inside

Set To

AUTO

M23509

SYSTEM

HEAT

DEHUMIDIFIER

Partially Locked Screen

When partially locked, the screen indicates Screen Locked for

5 to 7 seconds whenever the user attempts to press a key that

is locked. Pressing a locked key, while Screen Locked is

shown, flashes “Screen Locked” on the screen.

COOL

Permanent

Hold

CANCEL

M23521

In this mode, all keys are locked except the Temperature Up

and Down arrow keys:

Press Hold three times to enter the Southern Dehumidifi-

cation Away Setting.

These settings can only be changed in installer setup.

—

User can change temperature up or down but cannot

change schedule settings.

Temporary temperature change lasts until next scheduled

period and that time shows on screen.

To cancel temperature override and begin following

schedule, press Cancel key.

Clean Thermostat Screen

The thermostat has a touch screen interaction. Follow these

steps to clean the screen without making thermostat changes:

To unlock screen, see Installer Setup section.

Press the Screen key. Thermostat locks out all touch

keys for 30 seconds to allow for cleaning.

Fully Locked Screen

In this mode, all keys are locked and not functional. To unlock

screen, see Installer Setup section. The screen continuously

displays “Screen Locked.”

OK TO

CLEAN

SCREEN

Humidification Control

If you have a humidifier and outdoor temperature sensor, you

can use Frost Control to reduce window condensation.

Press MORE until the humidifier screen is displayed.

Press the Up or Down arrow to set the humidity and

Frost Control level. (Use a lower Frost Control level if

frost appears on windows. Use a higher setting if the air

is too dry.)

M19964

Press DONE to save and exit, or press CANCEL to exit

without saving changes.

Use damp cloth slightly moistened with water or house-

hold glass cleaner to clean the screen.

Repeat the above steps, as necessary.

NOTE: If you do not have an outdoor temperature sensor, the

Frost Control level will not be displayed.

IMPORTANT

Do not spray any type of liquid directly on the thermo-

Dehumidification Control

stat itself. If using household glass cleaner, spray

cleaner on cloth. Then use a cloth to clean the ther-

mostat screen.

If installed to control a dehumidifier, the thermostat can activate

it as needed to reduce humidity.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

If you don’t have a dehumidifier, the thermostat activates the

air conditioner to reduce humidity (may cool as much as 3°F

lower than your temperature setting).

1. Press the More key until the filter reminder appears on

the screen. This is the number of fan run-time or calen-

dar days remaining on the filter reminder.

Press MORE until the dehumidifier screen is displayed.

Press the Up or Down arrow to set the desired humidity

level and operation (Auto or Off).

MON

TUE

WED

THU

FRI

SAT

SUN

CHANGE FILTER UV LAMP HUMIDIFIER PAD

Press DONE to save and exit, or press CANCEL to exit

without saving changes.

RESET

Ventilation Control

You can ventilate your home at any time:

DAYS

Press MORE until the ventilation screen is displayed.

Press the Up or Down arrow to set the ventilation timer.

You can set the timer to ventilate from 20 to 180 minutes,

in 20-minute increments. To turn off the ventilator, select

SCHED

EDIT

H OO LL DD

WAKE

CLOCK SCREEN MORE

LEAVE RETURN SLEEP CANCEL

DONE

M22449

Press DONE to save and exit, or press CANCEL to exit

without saving changes.

Press the Edit key.

Use the Up and Down keys to change the number of run-

time or calendar days.

If programmed for auto-ventilation by the installer, the

thermostat will ventilate your home as needed.

MON

TUE

WED

THU

FRI

SAT

SUN

Indoor Air Quality Reminders

CHANGE FILTER UV LAMP HUMIDIFIER PAD

Filter Change Reminder

The filter change reminder must be turned on from the Installer

Setup. Once expired, the screen flashes, “Change Filter” and a

Reset key appears. Press the Reset key to reset the change

reminder. The installer can configure the Filter Change

Reminder to display remaining run-time or calendar days.

DAYS

SCHED

H OO LL DD

WAKE

CLOCK SCREEN

LEAVE RETURN SLEEP CANCEL

DONE

MON

TUE

WED

THU

FRI

SUN

M22450

OK TO PICK MULTIPLE DAYS SCREEN LOCKED

CHANGE FILTER UV LAMP HUMIDIFIER PAD

FAN

Inside

Set To

Press the Done key to go back to the viewing screen.

AUTO

MON

TUE

WED

THU

FRI

SAT

SUN

Following

Schedule

SYSTEM

HEATT

RESET

CHANGE FILTER UV LAMP HUMIDIFIER PAD

COOL

Humidity

SCHED

HOLD

CLOCK SCREEN MORE

RESET

M23511

DAYS

NOTE: When using run-time days, the days are counted as

fan run time, so anytime the fan is running, the

reminder is counting that time against the number of

days selected.

SCHED

EDIT

H OO LL DD

WAKE

CLOCK SCREEN MORE

LEAVE RETURN SLEEP CANCEL

DONE

M22449

The remaining days can be viewed by pressing the More key;

the remaining days can be edited using the More key or from

the Installer Setup. To view or reset the reminder before it

expires, follow these steps using the More key:

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Press the Reset key to activate the new number of days

selected in the previous screen.

NOTE: While the reminder is set according to calendar days,

the display shows the equivalent run time days.

MON

TUE

WED

THU

FRI

SAT

SUN

MON

TUE

WED

THU

FRI

SUN

CHANGE FILTER UV LAMP HUMIDIFIER PAD

RESET

DAYS

SCHED

EDIT

H OO LL DD

WAKE

CLOCK SCREEN MORE

LEAVE RETURN SLEEP CANCEL

SCHED

EDIT

HOLDD

WAKE

CLOCK SCREEN MORE

LEAVE RETURN SLEEP CANCEL

M23517

DONE

M22451

Press the Done key to return to the Home screen.

The remaining days can be edited using the More key or from

the Installer Setup. To view or reset the reminder before it

expires, follow these steps using the More key:

Humidifier Pad Reminder

The Humidifier Pad change reminder must be turned on from

the Installer Setup. Once expired, the screen flashes, “Change

Humidifier Pad” and a Reset key appears. Press the Reset key

to reset the change reminder.

Press the More key until the UV Lamp change reminder

appears on the screen. This is the number of run time

days remaining on the UV Lamp reminder.

Press the Edit key.

The remaining calendar or run time days can be viewed by

pressing the More key. The remaining days can be edited

using the More key or from the Installer Setup.

3. Use the Up and Down keys to change the number of cal-

endar days.

4. Press the Done key to go back to the viewing screen.

Press the Reset key to activate the new number of days

selected in the previous screen.

Press the Done key to return to the Home Screen.

MON

TUE

WED

THU

FRI

SUN

CHANGE FILTER UV LAMP HUMIDIFIER PAD

Temperature Recovery

The thermostat feature, Adaptive Intelligent Recovery™,

eliminates all guesswork when setting the thermostat schedule.

RESET

Simply set the program schedule to the time that the comfort

temperature is desired. The thermostat then turns on the

heating or cooling at just the right time to have the home reach

the scheduled temperature at the scheduled time.

DAYS

For example—get up at 6:00 AM and want the temperature to

be 70°F. Set the Wake period for 6:00 AM and 70°F. The

thermostat then turns on the heat before 6:00 AM to raise the

temperature to 70°F by 6:00 AM.

SCHED

EDIT

HOLD

WAKE

CLOCK SCREEN MORE

LEAVE RETURN SLEEP CANCEL

M23516

DONE

To view or reset the reminder before it expires, follow these

steps using the More key:

The thermostat alerts that the heating or cooling system is

coming on before a scheduled time by showing “Recovery” on

the screen.

Press the More key until the Humidifier Pad change

reminder appears on the screen. This is the number of

calendar days remaining on the Humidifier Pad reminder.

Press the Edit key.

Use the Up and Down keys to change the number of cal-

endar or run time days.

Press the Done key to go back to the viewing screen.

Press the Reset key to activate the new number of days

selected in the previous screen.

TUE

FAN

Inside

Set To

AUTO

Following

Schedule

Recovery

Press the Done key to return to the Home Screen.

SYSTEM

UV Lamp Reminder

COOL

The UV Lamp change reminder must be turned on from the

Installer Setup. Once expired, the screen flashes, “Change UV

Lamp” and a Reset key appears. Press the Reset key to reset

the change reminder.

Humidity

SCHED

HOLD

CLOCK SCREEN MORE

M23512

The remaining calendar days can be viewed by pressing the

More key.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

NOTE: It takes about a week for the thermostat to adjust to

local weather, the schedule, the construction of the

home and the heating and/or cooling system. Each

day it adjusts the next day’s recovery start time

accordingly.

Minimum Off-Timer

The Thermostat has built-in compressor protection (minimum-

off timer) that prevents the compressor from restarting too

early after a shutdown. The minimum-off timer is activated after

the compressor turns off.

P+I Control

If there is a call during the minimum-off timer, the thermostat

shows “Wait” in the display.

The thermostat microprocessor-based control requires that the

user understands temperature control and thermostat

performance. A conventional mechanical or electronic

thermostat does not control temperature precisely at setpoint.

Typically there is an offset (droop) in the control point as the

system load changes. This is a phenomenon that most people

in the industry know and accept. Many factors contribute to

offset including switch differential, thermal lag, overshoot, cycle

rates and system load.

WED

FAN

Inside

Set To

AUTO

Wait

Following

SYSTEM

HEAT

Schedule

The thermostat microprocessor simultaneously gathers,

compares and computes data. Using this data, it controls a

wide variety of functions. The special proprietary algorithm

COOL

Humidity

(program) in the thermostat eliminates the factors causing

offset. This makes temperature control more accurate than the

conventional mechanical or electronic thermostats. The

temperature control algorithm is called proportional plus

integral (P+I) control.

SCHED

HOLD

CLOCK SCREEN MORE

M23513

When the minimum-off timer expires, “Cool On” or “Heat On”^a

appears in the display and the compressor and fan turn on.

The thermostat sensor, located on the thermostat or remote,

senses the current space temperature. The proportional error

is calculated by comparing the sensed temperature to the

programmed setpoint. The deviation from the setpoint is the

proportional error.

_________

a_H_e_a_t_P_u_m_p_s_o_n_l_y_.

The thermostat also determines integral error, which is a

deviation based on the length of error time. The sum of the two

errors is the (P+I) error. The cycle rate used to reach and

maintain the setpoint temperature is computed using the P+I.

The addition of the integral error is what differentiates the

thermostat from many other electronic and mechanical

thermostats. See Fig. 33.

Inside Humidity Level

The humidity level in the home is shown in the lower right

corner of the Home Screen.

NOTE: If an outdoor temperature sensor is present, the out-

door temperature will be displayed in this location

rather than the indoor humidity. To see indoor humid-

ity, display the humidity settings menu.

THERMOSTAT

COOL SETPOINT

PROPORTIONAL COOL

CONTROL POINT

TUE

P+I CONTROL

POINT

FAN

Inside

Set

AUTO

P+I CONTROL POINT

Following

Schedule

SYSTEM

PROPORTIONAL HEAT

CONTROL POINT

THERMOSTAT

HEAT SETPOINT

COOL

Humidity

HEATING

COOLING

SCHED

HOLD

CLOCK SCREEN MORE

100

M23678

PERCENT LOAD

M4414

If thermostat is set to Auto Changeover System mode, press

the More key until the humidity level is shown on the screen.

Fig. 33. Proportional temperature control versus P+ I

temperature control.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 12. Sensor Resistance at

Outdoor Temperature.

MON

TUE

WED

THU

FRI

SUN

Outdoor

Temperature

Outdoor

Temperature

Inside

Ohms of

°C

Resistance

°F

°C

Resistance

-20

-18

-16

-14

-12

-10

-28.9

-27.8

-26.7

-25.6

-24.4

-23.3

-22.2

-21.1

-20.0

-18.9

-17.8

-16.7

-15.6

-14.4

-13.3

-12.2

-11.1

-10.0

-8.9

106926

100923

95310

90058

85124

80485

76137

72060

68237

64631

61246

58066

55077

53358

49598

47092

44732

42506

40394

38400

36519

34743

33063

31475

29975

28558

27219

25949

24749

23613

22537

21516

20546

19626

18754

17926

11.1

12.2

13.3

14.4

15.6

16.7

17.8

18.9

20.0

21.1

22.2

23.3

24.4

25.6

26.7

27.8

28.9

30.0

31.1

32.2

33.3

34.4

35.6

36.7

37.8

38.9

40.0

41.1

42.2

43.3

44.4

45.6

46.7

47.8

48.9

17136

16387

15675

14999

14356

13743

13161

12607

12081

11578

11100

10644

10210

9795

9398

9020

8659

8315

7986

7672

7372

7086

6813

6551

6301

6062

5834

5614

5404

5203

5010

4826

4649

4479

4317

SCHED

HOLD

WAKE

CLOCK SCREEN

LEAVE RETURN SLEEP CANCEL

M23679

DONE

-8

-6

C7089U1006 Outdoor Temperature Sensor

-4

-2

Operation

When installed with Thermostat Installer Setup Number 0342

set to 1, the outside temperature can be displayed on the

thermostat. See Fig. 34.

MON

TUE

WED

THU

FRI

SAT

SUN

FAN

Inside

Set To

AUTO

Following

Schedule

SYSTEM

HEAT

Outside

-7.8

-6.7

-5.6

SCHED

HOLD

CLOCK SCREEN MORE

-4.4

M22453

-3.3

-2.2

100

102

104

106

108

110

112

114

116

118

120

Fig. 34. Outside temperature reading on

VisionPRO IAQ Thermostat.

-1.1

0.0

The C7089U1006 Outdoor Sensor converts outdoor ambient

temperature to a resistance that the thermostat can interpret.

1.1

2.2

The C7089U1006 has a negative temperature coefficient

3.3

(

NTC), which means that resistance decreases as the

temperature increases. See Table 12.

4.4

5.6

Checkout

6.7

Allow C7089U1006 Outdoor Sensor to absorb outdoor air for a

minimum of twenty minutes before taking a reading.

7.8

8.9

With an accurate thermometer (±1°F [0.5°C]) measure the

temperature at the sensor location, allowing time for the

thermometer to stabilize before reading.

10.0

—

C7189U1005 Remote Indoor Temperature

Sensor

To verify sensor resistance, remove one wire from one of the

C7089U1006 60-in. leadwires. Use an ohmmeter to measure

the resistance across the sensor. Then verify the sensor

accuracy with the temperature/resistance in Table 12.

Operation

When installed with Thermostat Installer Setup Number 0340

set to 1, the remote inside temperature is displayed on the

thermostat home screen as Inside Temperature. The

thermostat internal temperature sensor is not used. When

Calibration

The C7089U1006 Outdoor Sensor is calibrated at the factory

and cannot be recalibrated in the field.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

installed with Thermostat Installer Setup Number 340 set to 2,

the temperature displayed on the thermostat home screen as

Inside Temperature will be a 50/50 average between the

temperature sensed at the remote sensor location and the

temperature sensed at the thermostat location.

COMMUNICATION ERROR CODES

VisionPRO^®IAQ can alert the homeowner and installer to

problems with the HVAC equipment, thermostat, or equipment

interface module by using error codes. Please see Table 14 for

a list of error codes. When an error is active (the condition

causing the error is still present) it will be displayed in the time

field on the thermostat home screen. The home screen can

display up to 5 active errors. The time field will flash the time,

The C7189U1005 Wall Mount Temperature Sensor converts

room temperature to a resistance that the thermostat can

interpret.

“

Err,” and a list of up to 5 error codes, beginning with the most

The C7189U1005 has a negative temperature coefficient

critical, and repeat until the errors have been remedied.

(NTC), which means that resistance decreases as the

temperature increases. See Table 13.

A log of error codes can be viewed at the end of the installer

setup after the system tests. Active errors will be shown first.

The Error Log will log the last ten errors (active and inactive).

Pressing the reset button will clear all inactive errors from the

error log; active errors can not be cleared until the condition

has been remedied.

The C7189U1005 can be used to provide one remote sensor

input (see Fig. 26) or as a temperature averaging network with

multiple C7189U1005 Sensors connected, as shown in Fig. 27.

Checkout

For best results, allow C7189U1005 Wall Mount Temperature

Sensor to absorb the air moving through the room for a

minimum of twenty minutes before taking a resistance

measurement.

Table 14. VisionPRO^®IAQ Error Codes.

Error Code

027

Meaning

With an accurate thermometer (±1°F [0.5°C]) measure the

temperature at the sensor location, allowing time for the

thermometer to stabilize before reading.

Faulty thermostat (must be replaced

Duplicate UV timer

Duplicate filter timer

To verify sensor resistance, remove one wire from one of

C7189U1005 wiring terminals. Use an ohmmeter to measure

the resistance across the sensor. Then verify the sensor

accuracy with the temperature/resistance in Table 13.

Duplicate humidifier pad timer

Duplicate indoor humidity sensor

Compressor should be running but it is not

Duplicate outdoor temperature sensor

Faulty post-coil air discharge sensor

Faulty outdoor temperature sensor

Faulty indoor humidity sensor

Heating/cooling equipment is missing

Data interface is continuously busy

040

Calibration

The C7189U1005 Wall Mount Temperature Sensor is

calibrated at the factory and cannot be recalibrated in the field.

Table 13. Sensor Resistance at Room Temperature.

Room

Temperature

Room

Temperature

091

Thermostat is not receiving data from other

equipment

Ohms of

°C

Resistance

°F

100

°C

Resistance

118

119

121

Faulty discharge air temperature sensor

Faulty temperature sensor

4.4 22537

5.6 21516

6.7 20546

7.8 19626

8.9 18754

10.0 17926

11.1 17136

12.2 16387

13.3 15675

14.4 14999

15.6 14356

16.7 13743

17.8 13161

18.9 12607

20.0 12081

21.1 11578

22.2 11100

23.3 10644

24.4 10210

25.6 9795

26.7 9398

27.8 9020

28.9 8659

30.0 8315

31.1 7986

32.2 7672

33.3 7372

34.4 7086

35.6 6813

36.7 6551

37.8 6301

—

Duplicate post-coil air discharge sensor

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

TROUBLESHOOTING

Table 15. Troubleshooting.

Symptom

Possible Cause

Action

Display does not come on

Thermostat is not being powered

Check if the thermostat is mounted and latched on the wall

plate. If not:

—

Mount and latch the thermostat on the wallplate.

Check if the circuit breaker is tripped or the fuse is blown; if

it is:

—

Reset the circuit Breaker or replace the fuse.

Check if the power switch at the equipment is in the off

position; if it is:

—

Set to the on position.

Check for 24 Vac between terminals 2 and 3 at the

thermostat.

—

Replace any broken wires if 24Vac is not present.

Replace thermostat if 24Vas is present.

Check for 24 Vac between terminals R and C at the

Equipment interface module.

—

If 24Vac is not present consult electrician.

If 24 Vac is Present replace Equipment interface

module.

Temperature setting does not

change

The upper and lower temperature

limits reached

Check temperature setpoints.

Check installer setup Numbers 0600 and 610; modify as

needed.

Keypad is fully locked

Check Installer Setup Number 670 to change keypad

locked options.

Heating or cooling does not

come on and thermostat is not activated

calling for heat or cool.

Thermostat minimum off timer is

Wait up to 5 minutes for the system to respond (Wait is

displayed on the Thermostat home screen.

System selection is not set to Heat Set system selection to correct setting.

or Cool

Heating or cooling equipment is not Check Wiring.

operating Check installer setup number 172 and verify the correct

Heating or cooling does not

come on and thermostat is

calling for heat or cool.

system type is chosen.

Verify operation of equipment in system test mode.

Heat does not turn on (“Heat On” Heating Equipment failure

is solid in the display)

Check for 24 Vac at the equipment on the secondary side

of the transformer between power and common. If voltage

is not present check the heating equipment to find the

cause of the problem.

Check for 24 Vac between the heat terminal(s) on the

equipment interface Module and transformer common. If

present check heating equipment to find the cause of the

problem.

Loose or broken wire connection

between Equipment Interface

Module and heating equipment.

Check for 24 Vac between the heat terminal(s) on the

HVAC equipment and system transformer common. If

voltage is not present check for loose or broken wires

between the EIM and heating equipment.

Communication is not being

completed

End the call for heat at the thermostat then repeat the call

for heat. Check the communication LED on the EIM board.

—

If the LED does not blink, check communication

wiring (wire between terminal 1 on both the EIM

and thermostat.

—

If the LED does blinks correctly, check for 24 Vac

between heating terminals on the EIM and the sys-

tem common.

If 24 Vac is not present check the R to Rh connection on

the EIM, if the connection is good replace the EIM.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 15. Troubleshooting. (Continued)

Possible Cause

Symptom

Action

Cooling does not turn on (“Cool Cooling Equipment failure

On” is solid in the display)

Check for 24 Vac at the equipment on the secondary side

of the transformer between power and common. If voltage

is not present check the cooling equipment to find the

cause of the problem.

Check for 24 Vac between the cool terminal(s) on the

equipment interface Module and transformer common. If

present check cooling equipment to find the cause of the

problem.

Loose or broken wire connection

between Equipment Interface

Module and cooling equipment.

Check for 24 Vac between the cool terminal(s) on the

cooling equipment and system transformer common. If

voltage is not present check for loose or broken wires

between the EIM and cooling equipment.

Communication is not being

completed

End the call for cool at the thermostat then repeat the call

for cool. Check the communication LED on the EIM board.

—

If the LED does not blink, check communication

wiring (wire between terminal 1 on both the EIM

and thermostat.

—

If the LED does blinks correctly, check for 24 Vac

between heating terminals on the EIM and the sys-

tem common.

If 24 Vac is not present check the R to Rh connection on

the EIM, if the connection is good replace the EIM.

nd stage heat or cool does not Stage configuration is not set

Set the stage configuration in installer setup for additional

stages of cool (ISU 174) or additional stages of heat (ISU

176).

energize

correctly to match the number of

selected stage

Terminals not connected properly at Check that 24 Vac is present at W2/AUX and W3/AUX2 for

EIM

2nd and 3rd stages of conventional heating and for 3rd and

th stages of heat pump heating. Also check that 24VAC is

present at Y2 for 2nd stage of cooling or 2nd stage heat in

heat pump applications.

“

Err” appears in time field of

Thermostat has detected an error

on the communication bus

Refer to error code section for more information.

home screen on thermostat

Fan does not turn on in a call for Fan Control in Heating is set to Gas Set Fan Control in Heating to Electric Furnace (Setting

heat (electric furnace).

or Oil Furnace (Setting 0180).

0180).

Heat pump puts out cool air in

Changeover Valve (Installer Setup Set Changeover Valve (Installer Setup Number 0190) to

the heat mode and warm air in Number 0190) is not configured to match the changeover required by the installed heat pump.

the cool mode.

match the changeover required by

the installed heat pump.

Both the heating and cooling

equipment are running at the

same time.

The heating equipment is not a heat Set System Type (Installer Setup Number 0172) to match

pump but the System Type (Installer the installed heating and/or cooling equipment.

Setup Number 0172) is set to Heat

Pump.

Heating and cooling wires are

shorted together.

Separate the shorted heating and cooling wires.

Heating equipment is running in Heating equipment is not a heat

Set System Type (Installer Setup Number 0172) to match

the installed heating and/or cooling equipment.

the cool mode.

pump but System Type (Installer

Setup Number 0172) is set to Heat

Pump.

Heating equipment does not turn Heating equipment is not a heat

off and heat temperature setting pump but System Type (Installer

is set below room temperature Setup Number 0172) is set to Heat

Set System Type (Installer Setup Number 0172) to match

the installed heating and/or cooling equipment.

(

Heat On is not in the display). Pump.

Cannot set the system setting to System Type (Installer Setup

Heat.

Set System Type (Installer Setup Number 0172) to match

Number 0172) is set to Cool Only. the installed heating and/or cooling equipment.

Cannot set the system setting to System Type (Installer Setup

Set System Type (Installer Setup Number 0172) to match

Cool.

Number 0172) is set to Heat Only or the installed heating and/or cooling equipment.

Heat Only with Fan.

8-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

Table 15. Troubleshooting. (Continued)

Symptom

Possible Cause

Action

Heat On is not in the display.

System setting is not set to Heat

and/or temperature setting is not set setting above the room temperature.

above room temperature.

Set the system setting to Heat and set the temperature

Cool On is not in the display.

Wait is in the display.

System setting is not set to Cool

and/or the temperature setting is

not set below room temperature.

Set the system setting to Cool and set the temperature

setting below the room temperature.

Compressor minimum off timer is

active.

Wait up to five minutes for the cooling or heating (heat

pump) equipment to turn on.

“

Screen Locked” appears on the The keypad is fully or partially

Check Installer Setup Number 0670 to change keypad

locked options.

screen and all or some of the

keys do not respond.

locked.

68-0287—1

VISIONPRO^®IAQ TOTAL HOME COMFORT SYSTEM

COMPATIBILITY

Recommend the following products for use with the VisionPRO® IAQ.

Table 16. Humidifiers

HE440A1005—Powered Steam Humidifier with 13 gpd capacity

HE365A1006—Powered Bypass Flow-through humidifier with 18 gpd capacity

HE265A1007—Bypass Flow-through humidifier with 17 gpd capacity

HE225A1006—Bypass Flow-through humidifier with 12 gpd capacity

Table 17. Dehumidifier

DH90A1007—90 Pint Whole House Dehumidifier

Table 18. Ventilation

HR150B1005—heat recovery ventilator 150cfm with built in defrost

HR200B1005—heat recovery ventilator 200cfm with built in defrost

ER150B2006—energy recovery ventilator 150cfm with built in defrost

ER150C2004—energy recovery ventilator 150cfm with no defrost

ER200B2006—heat recovery ventilator 200cfm with built in defrost

ER200C2004—heat recovery ventilator 200cfm with no defrost

EARD5—5” round damper NC Power Open/Spring Close

EARD6—6” round damper NC Power Open/Spring Close

EARD7—7” round damper NC Power Open/Spring Close

EARD8—8” round damper NC Power Open/Spring Close

Following is a list of compatible communicating products.

Table 19. Communicating Products

THM5421C—Equipment Interface Module Universal up to 4H2C systems

T8635L1013*—3H3C communicating Thermostat

W8635A1006—Equipment Interface Module for 2H2C conventional systems

W8635B1004—Equipment Interface Module for 2H2C heat pump systems

W8735A1005—EnviraCOM Serial Port Adapter

W8735B1003—Telephone Access Module

W8735D1009—Telephone Access Module two Channel communicating

W8735D1017—Telephone Access Module four channel communicating

W8835A1004—Envirazone Zone Panel

C7835A1009—Communicating Discharge Air Sensor

W8703A1003—Damper Interface Module

L7224C1004—120VAC Electronic Aquastat

L7248—Aquastat

R7184—Oil Primary

T8635L thermostats used with TH9421C thermostats must be used with a W8835A Zone Panel and the TH9421C must be the

Master Zone Controller (zone 1 thermostat)

Table 20. UV Lights

UV100E2009

UV100E1043

UV100E3007

8-0287—1