Honeywell THX9321 Prestige, THX9421 Prestige Product Information Sheet

PRODUCT DATA

68-0311-03

THX9321 Prestige

®

2.0 and

THX9421 Prestige

®

IAQ

with EIM

APPLICATION

The Prestige 2.0 and Prestige IAQ Systems feature an

effortless, 7-Day programmable color touchscreen thermostat

that provides control of temperature, humidification,

dehumidification, and ventilation for up to 4 Heat/2 Cool heat

pump systems or up to 3 Heat/2 Cool conventional systems

for residential and commercial applications.

FEATURES

• RedLINK™ Compatible

Increase your content and profit per job by including

RedLINK™ accessories that meet your customers comfort

and convenience needs. RedLINK accessories include the

Wireless Outdoor Sensor, Portable Comfort Control (PCC),

Equipment Interface Module (EIM), RedLINK Internet

Gateway, Wireless Indoor Sensor, TrueSTEAM™ humidi-

fier with Wireless Adapter, TrueZONE™ zoning panel with

Wireless Adapter, Vent Boost Remote and Entry/Exit

Remote.

• Customizable Service Reminders

Set up to 10 service reminders. Choose from the pre-set

options or customize your own. Reminders based on date

or the outdoor temperature.

• Delta T Alerts and Diagnostics

Alerts give customers a sense of security while allowing

you to service or replace the equipment prior to a loss of

heating or cooling. Based on limits you set at installation,

customers can be alerted when their system is not operat-

ing as expected. The system alert will instruct customers to

contact you for assistance. Requires Equipment Interface

Module.

• Delta T Installer Test

Save time by viewing Delta T while running a system test to

verify proper operation. Requires Equipment Interface

Module.

• Universal Inputs

EIM - S1, S2, S3, S4

Assignable inputs allow you to setup Indoor and Outdoor

Temperature Sensors, Discharge and Return Air Sensors

or Dry Contact Devices. Dry Contact Devices can be used

to trip pre-set or customized alerts on the thermostat home

screen. Requires Equipment Interface Module.

• Data Logs

The thermostat stores an Alerts Log, User Interactions Log

and a Performance Log to quickly determine if an issue is

caused by a system error or an accidental user error. Note:

The Performance Log only applies to the THX9421

thermostat.

• Selectable for Residential and Light Commercial

Applications

One thermostat does it all to meet the needs of Residential

and Light Commercial applications. Simply select Residen-

tial or Commercial during the installer setup. If Commercial

is selected, the thermostat will use commercial language,

meet building codes and offer 365 day holiday scheduling.

• USB Port for Quick Installer Setup

Save time by using a USB stick to upload installer settings,

and service reminders in one simple step.

• Selectable Sensors

When paired with a Wireless Indoor Sensor(s) you have

the ability to choose which sensor(s) to use for tempera-

ture, humidification and dehumidification. They can be

used in combination for temperature averaging—or individ-

ually—to condition humidity levels in separate spaces.

THX9321 Prestige

®

2.0

THX9421 Prestige

®

IAQ with EIM

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 2

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the

TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information,

or would like to comment on our products or services, please write or phone:

1. Your local Honeywell Environmental and Combustion Controls Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386

3. http://customer.honeywell.com or http://customer.honeywell.ca

International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech

Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.

CONTENTS

Application ........................................... 1

Specifications ...................................... 3

Ordering Information ........................... 2

System Installation .............................. 8

When Installing this Product... ..................... 8

Installing Equipment Interface Module (if used)

10

Wiring 24 Vac Common ................................ 10

Selecting Discharge and Return Air Temperature

Sensor Mounting Locations ......................... 10

Selecting Discharge and Return Air Temperature Sensor

Mounting Locations .............................................. 10

Selecting Return Air Temperature Sensor Mounting Loca-

tion ....................................................................... 11

Selecting Thermostat Location .................... 12

Installing Wallplate ........................................ 12

Power Optional REDLINK™ Accessories ... 14

Linking Thermostat to Equipment Interface Mod-

ule (if used) .................................................... 15

Linking RedLINK™ Accessories ................. 16

Mounting Optional Accessories .................. 70

Alerts and Diagnostics ....................... 87

Delta T Diagnostics ....................................... 87

Before You Set Up Delta T Diagnostics ....... 87

Setting up Alerts and Diagnostics ............... 88

Delta T Alerts ................................................. 90

Delta T Alerts and Utility Saver Switches ... 91

Data Logs ....................................................... 91

Alerts Log ............................................................. 92

User Interactions Log ........................................... 93

Dry Contact Alerts ........................................ 95

Installer Tests ...................................... 68

Using the Equipment Test ............................ 69

Using the Wireless Signal Strength Test .... 69

Indoor Air Quality (IAQ) Control ......... 102

Humidification ............................................... 102

Set up Humidification ........................................... 102

Control Humidification Level ................................ 104

Dehumidification - Residential ..................... 105

Set up Dehumidification With Cooling System ..... 105

Set up Dehumidification With Whole House Dehumidifier

106

Set up Dehumidification Away Mode .................... 108

Control Dehumidification Level ............................. 108

Dehumidification - Commercial ................... 109

Set up Dehumidification With Cooling System ..... 109

Set up Dehumidification With Dehumidifier .......... 110

Control Dehumidification Level ............................. 112

Ventilation ...................................................... 112

Set up Ventilation ................................................. 113

IAQ Reminders ..................................... 116

Customizable Reminders ................... 116

USB Port ............................................... 119

Heat Pump and Backup Heat Operation

100

Portable Comfort Control ................... 129

Remote Indoor Sensors ...................... 130

Commercial Features .......................... 121

Ramp Rates ................................................... 123

Custom Names .............................................. 124

Remote Setback ............................................ 124

Economizer and Time of Day (TOD) Operation

126

Pre-Occupancy Purge ................................... 126

Staging Control ............................................. 97

Optional Accessories .......................... 128

Troubleshooting .................................. 159

Wiring ................................................... 135

EIM Wiring Diagrams .................................... 138

Geothermal Radiant Heat ............................. 100

THX9321 Thermostat Wiring Diagrams ....... 141

THX9321 Thermostat Wiring Diagrams Using Uni-

versal Relays to Control Heating or Cooling 142

Wiring IAQ Equipment or a Heat/Cool Stage to the

Universal Terminals ...................................... 149

Economizer Module Wiring Diagrams ......... 151

Wiring C7089U1006 Outdoor Sensor .......... 153

Wiring guide — Wired Indoor Sensors ........ 154

Regulatory Information ....................... 159

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

3 68-0311—03

SPECIFICATIONS

Thermostat Description:

Electrical Ratings for:

Equipment Interface Module and the THX9321 Prestige 2.0

Thermostat

NOTE: To find what terminals are available on the Equip-

ment Interface Module and the Prestige Thermo-

stats, see “Terminal Designations” below the

table.

Terminal Designations:

— Equipment Interface Module: R, RC, RH, C, W-O/B,

W2-AUX 1, W3-AUX 2, Y, Y2, G, A-L/A, U1 U1, U2 U2,

U3 U3, S1 S1, S2 S2, S3 S3, S4 S4, A, B, C, D

— THX9421 Thermostat: R, C

— THX9321 Thermostat: R, RC, C, W-O/B, W2-AUX/E, Y,

Y2, G, A-L/A, K, U1 U1, U2 U2

Power Consumption of THX9421/THX9321:

Full brightness = 3.0 VA

1/2 brightness = 2.1 VA

Backlight off = 1.9 VA

RedLINK Communication:

Frequency: 900 Mhz frequency range

Re-Sync Time: RedLINK devices re-establish communication

within 6 minutes after AC power resumes.

Temperature Setting Range:

Heating: 40 to 90 °F (4.5 to 32 °C).

Cooling: 50 to 99 °F (10 to 37 °C).

Temperature Sensor Accuracy: ± 1.5 °F at 70 °F (0.75 °C at

21.0 °C)

Humidification Setting Range:

10% to 60% RH.

Dehumidification Setting Range:

40% to 80% RH.

Humidity Display Range:

0% to 99%.

Humidity Sensor Accuracy: ± 5% RH from 30% to 50% RH

at 75 °F (24 °C).

Cool Indication:

Prestige 2.0 and Prestige IAQ 2.0 displays “Cool On” when the

thermostat turns the cooling on.

Heat Indication:

Prestige 2.0 and Prestige IAQ 2.0 displays “Heat On” when the

thermostat turns the heating on.

Auxiliary Heat Indication:

Prestige 2.0 and Prestige IAQ 2.0 displays “Auxiliary Heat On”

when the thermostat turns the auxiliary heat on.

Interstage Differential:

Comfort: The thermostat keeps the indoor temperature within 1

degree of the setpoint (droop less control). The thermostat

turns on stage 2 when the capacity on stage 1 reaches

90%.

When the interstage differential is set to 1.0 or higher, the ther-

mostat stages the equipment based on how far the indoor

temperature is from the setpoint (ISU 3030 to 3090). See

page 31 for more information.

Clock Accuracy: ± 1 minute per month at 77 °F (25 °C). ± 2

minutes per month over the operating ambient temperature

range.

Mounting Means:

Thermostat mounts directly on the wall in the living space

using mounting screws and anchors provided. Fits a hori-

zontal 2 x 4 in. junction box.

Equipment Interface Module (EIM) mounts on HVAC equip-

ment or on a wall in the equipment room.

Feature Description

Powering method • Common wire only

System types (up to

4 heat/2 cool heat

pump and up to 3

heat/2 cool

conventional)

• Gas, oil or electric heat with air

conditioning

• Warm air, hot water, high-efficiency

furnaces, heat pumps, steam and

gravity

• Cool only

Changeover Manual or Auto changeover selectable

System setting Em Heat-Heat-Off-Cool-Auto

Fan setting Auto-On-Circ-Follow Schedule

Ter minal

Volt ag e

(50/60 Hz)

Max. Current

Rating

W - O/B 18 to 30 VAC and

750 mVDC

1.00A

Y (cooling) 18 to 30 VAC 1.00A

G (fan) 18 to 30 VAC 0.50A

W2 - Aux 1 (heating) 18 to 30 VAC 0.60A

W3 - Aux 2 (heating) 18 to 30 VAC 0.60A

Y2 (cooling) 18 to 30 VAC 0.60A

A-L/A (Output) 18 to 30 VAC 1.00A

U1, U1

U2, U2

U3, U3

18 to 30 VAC 0.50A

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 4

Fig. 1. Dimensions of THX9421 Prestige IAQ thermostat in

in. (mm).

Fig. 2. Dimensions of THX9421 Prestige IAQ cover plates

in in. (mm).

Fig. 3. Dimensions of THX9321 Prestige

®

2.0 thermostat in

in. (mm).

Fig. 4. Dimensions of THX9321 Prestige 2.0 cover plate in

in. (mm).

Fig. 5. Dimensions of Equipment Interface Module in in.

(mm).

M34630

3-5/16 (84)

3-1/2

(89)

4-1/2 (115)

7/8

(22)

M34262

1-25/32

(46)

5-33/64

(140)

2-1/8

(54)

4-21/64

(110)

1-25/32

(46)

6-7/8

(175)

2-1/8

(54)

5

(127)

M33329A

6-13/16 (173)

3-5/16 (84)

1-7/16

(36)

3-7/8

(99)

M33330

3-19/64 (84)

7-29/32 (201)

5-1/2

(140)

M33331

4-53/64 (123)

8-7/8

(225)

9-11/32

(237)

1-19/32

(41)

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

5 68-0311—03

Table 1. Prestige Kits.

Kit

Part Number

Included in Kit

Part Number Description

Prestige IAQ Kit

YTHX9421R5101WW

THX9421R5021WW Thermostat - White Front, White Side

THM5421R1021 Equipment Interface Module

C7089R1013 Wireless Outdoor Sensor

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5101BB

THX9421R5021BB Thermostat - Black Front, Black Side

THM5421R1021 Equipment Interface Module

C7089R1013 Wireless Outdoor Sensor

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5101SG

THX9421R5021SG Thermostat - Silver Front, Gray Side

THM5421R1021 Equipment Interface Module

C7089R1013 Wireless Outdoor Sensor

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5101WG

THX9421R5021WG Thermostat - White Front, Gray Side

THM5421R1021 Equipment Interface Module

C7089R1013 Wireless Outdoor Sensor

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5085WW

THX9421R5021WW Thermostat - White Front, White Side

THM5421R1021 Equipment Interface Module

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5085BB

THX9421R5021BB Thermostat - Black Front, Black Side

THM5421R1021 Equipment Interface Module

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5085SG

THX9421R5021SG Thermostat - Silver Front, Gray Side

THM5421R1021 Equipment Interface Module

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige IAQ Kit

YTHX9421R5085WG

THX9421R5021WG Thermostat - White Front, Gray Side

THM5421R1021 Equipment Interface Module

50062329-001 Discharge/Return Sensors (Qty. 2)

Prestige 2.0 Kit

YTHX9321R5061

THX9321R5030 Thermostat

REM5000R1001 Portable Comfort Control

C7089R1013 Wireless Outdoor Sensor

Prestige 2.0 Kit

YTHX9321R5079

THX9321R5030 Thermostat

C7089R1013 Wireless Outdoor Sensor

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 6

Table 2. Thermostat Replacement Parts and Accessories.

Product Part Number

Operating

Ambient

Temperature

Operating

Relative Humidity

Shipping

Temperature

Physical Dimensions in in.

(mm) Color(s)

Thermostat THX9421R5021WW 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

4-1/2 x 3-1/2 x 7/8

(115 x 88 x 22)

Front-White,

Side-White

THX9421R5021BB 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

4-1/2 x 3-1/2 x 7/8

(115 x 88 x 22)

Front-Black,

Side-Black

THX9421R5021SG 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

4-1/2 x 3-1/2 x 7/8

(115 x 88 x 22)

Front-Silver,

Side-Gray

THX9421R5021WG 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

4-1/2 x 3-1/2 x 7/8

(115 x 88 x 22)

Front-White,

Side-Gray

THX9321R5030 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

6-13/16 x 3-7/8 x 1-7/16

(173 x 99 x 36)

Arctic

White

Equipment Interface

Module

YTHM5421R1010*

THM5421R1021

-40 to 165 °F

(-40 to 73.9 °C)

5% to 95%

Non-Condensing

-20 to 165 °F

(-28.9 to 73.9 °C)

9-11/32 x 4-53/64 x 1-19/32

(237 x 123 x 41)

Gray

Wireless Adapter

(For TrueZONE,

TrueSTEAM or

extend wireless

range of EIM)

THM4000R1000 -40 to 165 °F

(-40 to 73.9 °C)

5% to 95%

Non-Condensing

-20 to 165 °F

(-28.9 to 73.9 °C)

5-9/16 x 4-3/8 x 1-1/4

(141 x 112 x 32)

Gray

RedLINK Internet

Gateway

THM6000R1002 32 to 120 °F

(0 to 48.9 °C)

5% to 95%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

6 x 4-7/8 x 2-1/2

(152 x 124 x 64)

Black

Portable Comfort

Control

REM5000R1001 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

6-1/4 x 3-1/8 x 1-5/8

(158 x 80 x 38)

Arctic White

Gray

Wireless Entry/Exit

Remote

REM1000R1003 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

3-15/16 x 1-15/16 x 5/8

(101 x 50 x 16)

Arctic White

Wireless Vent and

Filter Boost Remote

HVC20A1000 32 to 120 °F

(0 to 48.9 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

3-15/16 x 1-15/16 x 5/8

(101 x 50 x 16)

Arctic White

Wireless Outdoor

Sensor

C7089R1013 -40 to 140 °F

(-40 to 60 °C)

0% to 100%

Condensing

-40 to 120 °F

(-40 to 48.9 °C)

5 x 3-1/2 x 1-11/16

(127 x 89 x 43)

Gray

Wireless Indoor

Sensor

C7189R1004 0 to 120 °F

(-17.8 to 48.9 °C)

For optimal

Battery Life:

35 to 114 °F

(1.7 to 45.6 °C)

5% to 90%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

2-7/8 x 1-7/8 x 15/16

(74 x 48 x 24)

Arctic White

Wired Outdoor

Sensor

(10K ohm Negative

Temperature

Coefficient)

C7089U1006 -40 to 120 °F

(-40 to 48.9 °C)

5% to 95%

Non-Condensing

-40 to 130 °F

(-40 to 54.4 °C)

1-1/2 (38) - -

Wired Wall Mount

Indoor Sensor

(10K ohm Negative

Temperature

Coefficient)

C7189U1005 45 to 88 °F

(7 to 32 °C)

5% to 95%

Non-Condensing

-20 to 120 °F

(-28.9 to 48.9 °C)

2-9/32 x 1-1/2 x 11/16

(58 x 38 x 18)

Premier

White

Wired Wall Mount

Indoor Sensor

(20K ohm Negative

Temperature

Coefficient)

TR21 45 to 99 °F

(7 to 37 °C)

5% to 95%

Non-Condensing

-40 to 150 °F

(-40 to 65.5 °C)

4-9/16 x 3 x 7/8

(116 x 76.5 x 22)

White

Wired Wall Mount

Indoor Sensor

(10K ohm Negative

Temperature

Coefficient)

TR21-A 45 to 99 °F

(7 to 37 °C)

5% to 95%

Non-Condensing

-40 to 150 °F

(-40 to 65.5 °C)

4-9/16 x 3 x 7/8

(116 x 76.5 x 22)

White

Wired Flush Mount

Indoor Sensor

(20K ohm Negative

Temperature

Coefficient)

C7772A1004 45 to 99 °F

(7 to 37 °C)

5% to 95%

Non-Condensing

-40 to 150 °F

(-40 to 65.5 °C)

4-1/2 x 2-3/4 x 5/16

(114 x 70 x 8)

Brushed

Stainless

Steel

Wired Flush Mount

Indoor Sensor

(20K ohm Negative

Temperature

Coefficient)

C7772A1012 45 to 99 °F

(7 to 37 °C)

5% to 95%

Non-Condensing

-40 to 150 °F

(-40 to 65.5 °C)

4-1/2 x 2-3/4 x 5/16

(114 x 70 x 8)

Brushed

Stainless

Steel

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

7 68-0311—03

* Prestige IAQ Kits and YTHM5421R1010 Kit include 50062329-001 Discharge/Return Air Sensors. Replacement Discharge/

Return Air Sensor part number is C7735A1000.

Discharge or Return

Air Sensor

(10K ohm Negative

Temperature

Coefficient)

C7735A1000* 0 to 200 °F

(- 17.8 to 93.3 °C)

- - -20 to 120 °F

(-28.9 to 48.9 °C)

Probe:

3-3/4 x 1/4 (77 x 6.4)

Cap Diameter:

2-7/16 (62)

Gray

Discharge or Return

Air Sensor

(20K ohm Negative

Temperature

Coefficient)

C7041 - - - - - - 4-3/16 x 2-5/16 x 1-11/16

(107 x 59 x 43)

- -

Discharge or Return

Air Sensor

(20K ohm Negative

Temperature

Coefficient)

C7770A1006 45 to 99 °F

(7 to 37 °C)

5% to 95%

Non-Condensing

-40 to 150 °F

(-40 to 65.5 °C)

Probe: 6 x 1/4

(152 x 6.4)

- -

Occupancy Sensor

for Remote Setback

(Requires an

Equipment Interface

Module)

WSK-24 Receiver:

- 5 to 140 °F

(-21 to 60 °C)

Door Sensor:

-4 to 140 °F

(-20 to 60 °C)

PIR Sensor:

-4 to 104 °F

(-20 to 40 °C)

- - - - Receiver:

3.6 x 3.4 x 1.2

(91.4 x 86.4 x 30.5)

Door Sensor:

1.4 x 2.3 x 0.6

(35.8 x 57.6 x 15.2)

PIR Sensor:

2.8 x 3.9 x 1.1

(71 x 100 x 28)

White

THX9421

Coverplate

(covers marks left

by old thermostats)

THP2400A1027W

(Includes 2 cover

plates)

- - - - - - Small = 5-33/64 x 4-21/64

(140 x 110), Large = 6-7/8 x

5 (175 x 127)

White

THX9421

Coverplate

(covers marks left

by old thermostats)

THP2400A1027B

(Includes 2 cover

plates)

- - - - - - Small = 5-33/64 x 4-21/64

(140 x 110), Large = 6-7/8 x

5 (175 x 127)

Black

THX9421

Coverplate

(covers marks left

by old thermostats)

THP2400A1027G

(Includes 2 cover

plates)

- - - - - - Small = 5-33/64 x 4-21/64

(140 x 110), Large = 6-7/8 x

5 (175 x 127)

Gray

THX9321

Coverplate

(covers marks left

by old thermostats)

50028399-001 - - - - - - 7-29/32 x 5-1/2 (201 x 140) White

Wire Saver Module THP9045A1023 -40 to 163 °F

(-40 to 73 °C)

5% to 90%

Non-Condensing

-40 to 185 °F

(-40 to 85 °C)

- - Gray

Table 2. Thermostat Replacement Parts and Accessories. (Continued)

Product Part Number

Operating

Ambient

Temperature

Operating

Relative Humidity

Shipping

Temperature

Physical Dimensions in in.

(mm) Color(s)

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 8

SYSTEM INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow the

instructions can damage the product or cause a hazard-

ous condition.

2. Check the ratings given in the instructions to make sure

the product is suitable for your application.

3. Installer must be a trained, experienced service

technician.

4. After completing installation, use these instructions to

verify the product operation.

Finding Your Password (Date Code)

You will need the thermostat password to:

• Make changes to the Installer Setup.

• Setup Diagnostics.

• Perform an Installer Test.

• View Data Logs.

• Add, remove, rename or view connected RedLINK

accessories.

• Reset the thermostat to Factory Default settings.

The password (Date Code) is located on the back of the

thermostat. It can also be found by following these steps:

1. Touch Menu.

2. Select Dealer Information.

Fig. 6. Finding thermostat password.

Fig. 7. Finding thermostat password.

1324

1324

Password

(Date Code)

Dealer Informaon

OK

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

9 68-0311—03

INSTALLATION OPTIONS

The THX9321 Prestige

®

2.0 thermostat is wired directly to the equipment. The THX9421 Prestige

®

IAQ thermostat is used with the

Equipment Interface Module or with a TrueZONE Wireless Adapter.

If using the Equipment Interface Module, see “Installing Equipment Interface Module (if used)” beginning on page 10.

If using a TrueZONE wireless adapter, follow the installation instructions that came with the TrueZONE, and go to “Selecting

Thermostat Location” beginning on page 12.

Guidelines for Installing RedLINK

Devices

— When installing more than one Thermostat and Equip-

ment Interface Module, mount the Equipment Interface

Modules at least 2 feet apart for best RedLINK perfor-

mance. No minimum distance is required between the

Thermostats if the Thermostat is linked to an Equip-

ment Interface Module.

— When the Thermostat is wired directly to the equipment

(No Equipment Interface Module and No TrueZONE

Wireless Adapter), mount the Thermostats at least 2

feet apart for best RedLINK performance.

— To determine if a RedLINK device will communicate

properly in the installed location, during the connection

process, press and quickly release the connect button

on the RedLINK device at the desired mounting loca-

tion. If the RedLINK device connects, then it will work

reliably during normal operation. If the RedLINK device

does NOT connect, try a new location. During the con-

nection process, the signal is sent at low power and

during normal operation the signal is sent at high

power.

— To connect a RedLINK device, make sure to press and

quickly release the connect button on the RedLINK

device. Press and holding the connect button down too

long will not allow the device to connect.

— If you link the Thermostat to the TrueZONE Wireless

Adapter, you will NOT be able to do the following: con-

trol humidification, dehumidification or ventilation, setup

a program schedule remotely from a computer, smart

phone or tablet, work with the Wireless Indoor Sensor,

Entry / Exit Remote or the Vent and Filter Boost

Remote. To use these features, wire the Thermostat

directly to the zone panel or use an Equipment Inter-

face Module.

— If you are using a RedLINK device from a previous

installation, you must reset the device first before you

re-connect it to the new Thermostat/Equipment Inter-

face Module. See page 134 for more information.

TM

TM

OR

THX9421 THERMOSTAT –

2 WIRES FOR POWER

RedLINK TO EQUIPMENT INTERFACE MODULE

RedLINK TO TrueZONE WIRELESS ADAPTER

THX9421 THERMOSTAT –

2 WIRES FOR POWER

THX9321 THERMOSTAT

WIRED DIRECTLY TO EQUIPMENT

OR

MCR34631

W

I

R

E

D

D

I

R

E

C

T

L

Y

T

O

E

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 10

Installing Equipment Interface

Module (if used)

If no Equipment Interface Module is used, skip to “Selecting

Thermostat Location” beginning on page 12.

NOTE: If an EIM is mounted inside a metal cabinet, such

as a commercial rooftop unit, it is recommended

to use a THM4000R1000 Wireless Adapter for

extended wireless range. Mount the Wireless

Adapter outside the metal cabinet and connect to

the ABCD terminals at the EIM. The Wireless

Adapter functions as a remote antenna for the

EIM. After it is wired to the EIM, it automatically

takes over as the antenna for RedLINK communi-

cation. For best RedLINK performance, avoid

mounting the Wireless Adapter above the roof

deck or outside the exterior walls.

NOTE: If you install more than one thermostat and EIM,

the EIMs must be at least 2 feet apart for best

RedLINK performance.

Fig. 8.

CAUTION

Electrical Hazard.

Can cause electrical shock or equipment damage.

Disconnect power before wiring.

The Equipment Interface Module (EIM) can be mounted

vertically on the HVAC equipment or on a wall in the equipment

room.

1. Mount the EIM near the HVAC equipment or on the

equipment itself. Use screws and anchors as appropriate

for the mounting surface..

2. To wire the EIM, strip 1/4” insulation, then insert wires

(see Fig. 9). For wiring diagrams, see “Wiring” beginning

on page 135.

Fig. 9.

Wiring 24 Vac Common

• 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.

Selecting Discharge and Return Air

Temperature Sensor Mounting

Locations

Refer to the guidelines below and Fig. 10–14 for mounting

locations of the Discharge and Return Air Temperature

Sensors.

Selecting Discharge Air Temperature

Sensor Mounting Location

1. Mount the Discharge Air Temperature Sensor on the

supply duct in a location where the air is mixed well.

Mount the Discharge Air Temperature Sensor out of sight

of the A-Coil/Heat Exchanger when possible. See Fig.

10.

2. When possible, mount the Discharge Air Temperature

Sensor upstream of a Steam Humidifier, a Fan Powered

Humidifier or a Dehumidifier that is ducted to the supply.

See Fig. 11–12.

3. If space does not allow a Discharge Air Temperature

Sensor upstream of a Steam Humidifier or Fan Powered

Humidifier, mount the Discharge Air Temperature Sensor

downstream of the Humidifier. See Fig. 11. When setting

the Delta T Limits (see “Set Delta T Limits” on page 90),

be sure to consider the affect that the humidifier has on

Delta T.

4. If a Bypass Humidifier is installed, mount the Discharge

Air Temperature Sensor downstream of the Bypass

Humidifier. See Fig. 13–14.

EIM

A

B

C

D

WIRELESS

ADAPTER

CONNECT

POWER

THM4000R

CONNECTED

WIRELESS SETUP

MCR32389

R

C

Y

Y2

G

L

W

O/B

W2

AUX1

W3

AUX2

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®

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®

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11 68-0311—03

Selecting Return Air Temperature

Sensor Mounting Location

1. Install the Return Air Temperature Sensor on the return

duct in a location where the air is mixed well. Mount the

Return Air Temperature Sensor downstream of a Bypass

Humidifier, Dehumidifier or Ventilator. See Fig. 10–14.

Fig. 10.

Fig. 11.

Fig. 12.

Fig. 13.

MOUNT DISCHARGE

SENSOR HERE

M33074

HEAT

EXCHANGER

BLOWER

VENTILATOR

OR

DEHUMIDIF IER

MOUNT RETURN

SENSOR HERE

DOWNSTREAM OF

VENTILATOR OR

DEHUMIDIFIER

A-COIL

M33075A

HEAT

EXCHANGER

BLOWER

STEAM OR

FAN

POWERED

HUMIDIFIER

ALTERNATE MOUNTING LOCATION FOR DISCHARGE

SENSOR. WHEN SETTING THE LIMITS, BE SURE TO

CONSIDER THE AFFECT THAT THE HUMIDIFIER HAS

ON DELTA T.

MOUNT RETURN

SENSOR HERE

DOWNSTREAM OF

VENTILATOR OR

DEHUMIDIFIER

MOUNT

DISCHARGE

SENSOR HERE

ABOVE CENTER

OF A-COIL

UPSTREAM OF

STEAM OR FAN

POWERED

HUMIDIFIER

VENTILATOR

OR

DEHUMIDIF IER

M33076A

HEAT

EXCHANGER

BLOWER

MOUNT RETURN

SENSOR HERE

DOWNSTREAM OF

DEHUMIDIFIER

ALTERNATE MOUNTING LOCATION FOR DISCHARGE

SENSOR. WHEN SETTING THE LIMITS, BE SURE

TO CONSIDER THE AFFECT THAT THE DEHUMIDIFIER

HAS ON DELTA T.

MOUNT

DISCHARGE

SENSOR HERE

ABOVE CENTER

OF A-COIL

UPSTREAM OF

DEHUMIDIFIER

DEHUMIDIF IER

MOUNT RETURN

SENSOR HERE

MOUNT DOWNSTREAM

OF BYPASS HUMIDIFIER,

DEHUMIDIFIER OR

VENTILATOR

HEAT

EXCHANGER

BLOWER

VENTILATOR

OR

DEHUMIDIF IER

MOUNT

DISCHARGE

SENSOR HERE

MOUNT

DOWNSTREAM

OF BYPASS

HUMIDIFIER

BYPASS

HUMIDIFIER

M33078A

THX9321 PRESTIGE

®

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68-0311—03 12

Fig. 14.

Installing Discharge and Return Air

Temperature Sensors

Use the following steps to mount the Discharge/Return Air

Sensors:

1. Attach plastic cover to the sensor probe.

2. Drill 1/4-inch hole for the sensor probe and mount it to

the ductwork with enclosed screws (see Fig. 15).

3. Connect wires to S1, S2, S3, or S4 terminals at the EIM.

4. Setup the S1, S2, S3, or S4 terminals in the Installer

Setup at the thermostat.

Fig. 15. Mounting Discharge/Return Air Sensor.

Selecting Thermostat Location

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

with good air circulation at average temperature. See Fig. 16.

Fig. 16. Selecting thermostat location.

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

— Drafts or dead spots behind doors and in corners.

— Hot or cold air from ducts.

— Radiant heat from sun or appliances.

— Concealed pipes and chimneys.

— Unheated (uncooled) areas such as an outside wall behind

the thermostat.

Installing Wallplate

CAUTION

Electrical Hazard.

Can cause electrical shock or equipment damage.

Disconnect power before wiring.

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

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

1. Separate wallplate from thermostat.

Fig. 17. Separate wallplate from thermostat (THX9421).

2. Position and level the wallplate (for appearance only).

3. Use a pencil to mark the mounting holes.

MOUNT RETURN

SENSOR HERE

MOUNT DOWNSTREAM

OF BYPASS HUMIDIFIER,

DEHUMIDIFIER OR

VENTILATOR

HEAT

EXCHANGER

BLOWER

VENTILATOR

OR

DEHUMIDIF IER

MOUNT

DISCHARGE

SENSOR HERE

BYPASS

HUMIDIFIER

M33079A

M32995

5 FEET

[1.5 METERS]

YES

NO

NO

NO

M19925

1324

THX9321 PRESTIGE

®

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13 68-0311—03

4. 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.

5. Position the wallplate over the holes, pulling wires

through the wiring opening. See Fig. 18.

6. Insert the mounting screws into the holes and tighten.

Fig. 18. Mounting wallplate (THX9421).

Insert Coin Cell Battery in Thermostat

Place coin cell battery in thermostat. Be sure to follow polarity

markings on thermostat. See Fig. 19.

NOTE: Coin cell battery saves time and date during a

power loss.

Fig. 19. Insert coin cell battery (THX9421)

THX9421 Installation

INSTALLATION WITH EQUIPMENT INTERFACE MODULE

(EIM)

1. Wire to C and R terminals of the EIM or to a separate 24

volt transformer (not provided). See Fig. 20.

2. Snap thermostat onto wallplate after wiring is complete.

INSTALLATION WITH TRUEZONE WIRELESS ADAPTER

1. Wire to C and R terminals of the TrueZONE panel or to a

separate 24 volt transformer (not provided). See Fig. 20.

2. Snap thermostat onto wallplate after wiring is complete.

THX9321 Installation

THERMOSTAT WIRED DIRECTLY TO THE HVAC

EQUIPMENT OR ZONE PANEL

1. Refer to “THX9321 Thermostat Wiring Diagrams” begin-

ning on page 141.

2. Snap thermostat onto wallplate after wiring is complete.

INSTALLATION WITH EQUIPMENT INTERFACE MODULE

(EIM)

1. Connect power and common from the EIM to the Rc and

C terminals at the thermostat or use a separate 24 volt

transformer (not provided) to power the thermostat.

2. Snap thermostat onto wallplate after wiring is complete.

NOTE: Note: When the THX9321 thermostat is used with

an EIM, the relays in the thermostat do not func-

tion.

INSTALLATION WITH TRUEZONE WIRELESS ADAPTER

1. Connect power and common from the TrueZONE panel

to the Rc and C terminals at the thermostat or use a sep-

arate 24 volt transformer (not provided) to power the

thermostat.

2. Snap thermostat onto wallplate after wiring is complete.

NOTE: When the THX9321 thermostat is used with a

TrueZONE Wireless Adapter, the relays in the

thermostat do not function.

Fig. 20. Inserting wires in thermostat terminal screws

(THX9421).

MCR34688

R

C

1324

THX9321 PRESTIGE

®

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68-0311—03 14

Mount Thermostat on Wallplate

Align thermostat to wallplate and snap into place. See Fig. 19.

Fig. 21. Mount thermostat (THX9421).

POWER OPTIONAL REDLINK™

ACCESSORIES

1. Install batteries or power the optional RedLINK accesso-

ries.

2. If no RedLINK accessories are used, skip to “Linking

Thermostat to Equipment Interface Module (if used)”

beginning on page 15.

3. If no RedLINK accessories are used and there is no EIM

or TrueZONE Wireless Adapter, skip to “Completing Ini-

tial Setup” beginning on page 17.

Outdoor Air Sensor

1. Install 2 fresh AA lithium batteries.

Fig. 22.

Portable Comfort Control

1. Install 3 fresh AA alkaline batteries.

Fig. 23.

Indoor Air Sensor

1. Install 2 fresh AAA alkaline batteries.

Fig. 24.

RedLINK™ Internet Gateway

1. Connect power cord to an electrical outlet not controlled

by a wall switch.

2. Connect ethernet cable to router and the RedLINK Inter-

net Gateway.

Fig. 25.

R

C

MCR32937

MCR32939

MCR32938

M32940

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

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15 68-0311—03

TrueSTEAM

1. Wire and power TrueSTEAM.

2. Connect the ABCD terminals between TrueSTEAM and

the THM4000 Wireless Adapter.

3. Adjust the DIP Switches on TrueSTEAM as follows when

using the Wireless Adapter:

• DIP3: UP

• DIP4: UP

• DIP5: DOWN

Fig. 26. Powering TrueSTEAM wireless adapter.

Entry/Exit Remote or Vent Boost Remote

1. Remove the cover.

2. Insert the CR2450 coin cell battery (included) into the

slot at the bottom of the remote. See polarity marking on

the remote.

Fig. 27. Installing Entry/Exit Remote or Vent Boost Remote

battery.

3. The LED will briefly flash green. If it flashes red, battery

is not good.

PERFORMING INITIAL SETUP

Initial setup options define the type of system you are installing:

• Residential or commercial

• Non-zoned or zoned

• Used with or without an Equipment Interface Module

(THM5421)

• Used with or without the TrueZONE Wireless Adapter

(THM4000)

1. Follow prompts on the screen to select the appropriate

options.

Fig. 28.

NOTE: If you are connecting the thermostat to the True-

ZONE Wireless Adapter (THM4000), refer to the

TrueZONE instructions to link the thermostat and

RedLINK accessories.

Linking Thermostat to Equipment

Interface Module (if used)

1. Press and quickly release the CONNECT button on the

EIM. Make sure the Connected light is flashing green.

Fig. 29. EIM CONNECT button.

NOTE: If the Connected light does NOT flash green,

another system may be in the listening mode.

Please exit the listening mode at the other system

and then try again.

• Green flashing: In Listening Mode. System is ready

to add RedLINK devices.

• Green steady: RedLINK devices are communicating.

• Red: RedLINK device(s) not communicating. Check

EIM and RedLINK devices.

THM4000R1000

TrueSTEAM

MCR31476

6

543

2

ON

OFF

1

MCR33269

Next

CONNECT

CONNECTED

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

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68-0311—03 16

2. Follow the prompts on the thermostat screen until you

reach the Wireless Setup screen. See Fig. 30.

Fig. 30.

3. While the Connected light is flashing green on the EIM,

press Next on the thermostat. After a short delay, the

screen will display Device Connected.

Fig. 31.

4. Press Next, as directed on screen, to link RedLINK

accessories.

Linking RedLINK™ Accessories

Fig. 32. Connect RedLINK accessories.

1. When you see the prompt Do you have RedLINK

accessories to connect? touch Yes or No.

a. If you select No, continue to step 5.

b. If you select Yes, you will be prompted to Press Con-

nect on New Accessories. Continue to step 2.

NOTE: Accessories must be at least 2 feet away from the

thermostat or EIM during the linking process.

2. While the Add Device screen is displayed (listening

mode), press and quickly release the CONNECT button

on each new RedLINK accessory.

NOTE: For locations of CONNECT buttons on

RedLINK accessories, see “Locating the Con-

nect Buttons on RedLINK Accessories” begin-

ning on page 18.

Fig. 33. Thermostat in listening mode.

3. After a short delay (up to 20 seconds), check the thermo-

stat to confirm the connection of each RedLINK acces-

sory.

Fig. 34. Thermostat in listening mode.

4. Touch Done at the thermostat after all new RedLINK

accessories are connected.

NOTE: The thermostat displays a countdown timer

while in the listening mode. If it detects no activ-

ity for 15 minutes, it exits the listening mode.

Next

Next

Done

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

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17 68-0311—03

Completing Initial Setup

5. Finish the setup by selecting the desired options. Touch

Done after you select the last option you want to change.

See “Installer Options” beginning on page 21 for a full

listing of setup options.

Fig. 35. Scheduling options.

6. The thermostat now displays its Home screen and the

thermostat setup is complete.

Fig. 36. Thermostat home screen.

Adding RedLINK Accessories to the

Thermostat

If you want to add RedLINK accessories after the thermostat

has been setup, follow these steps.

1. Touch Menu.

2. Select Installer Options.

Fig. 37.

3. Enter password (date code) and touch Done. See “Find-

ing Your Password (Date Code) to Access Installer

Options” beginning on page 20 for more information.

Fig. 38.

4. Select Wireless Device Manager.

Fig. 39.

5. Select Add Device to display the Add Device screen. The

thermostat is now in listening mode.

Fig. 40.

NOTE: Accessories must be at least 2 feet away from the

thermostat or EIM during the linking process.

Installer Opons

Done

Wireless Device Manager

Add Device

THX9321 PRESTIGE

®

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®

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68-0311—03 18

6. Press and quickly release the CONNECT button on each

new RedLINK accessory.

NOTE: For locations of CONNECT buttons on

RedLINK accessories, see “Locating the Con-

nect Buttons on RedLINK Accessories” begin-

ning on page 18.

Fig. 41. Thermostat in listening mode.

7. After a short delay (up to 20 seconds), check thermostat

to confirm the connection of each RedLINK accessory.

8. Touch Done at the thermostat after all new RedLINK

accessories are connected.

Fig. 42. Thermostat in listening mode.

NOTE: Thermostat displays a count-down timer while in

the listening mode. If it detects no activity for 15

minutes, it exits listening mode.

Locating the Connect Buttons on

RedLINK Accessories

Wireless Outdoor Sensor

1. Press and quickly release the CONNECT button on the

Wireless Outdoor Sensor. After a short delay (up to 15

seconds), the thermostat will display “Wireless Outdoor

Sensor added.”

Fig. 43. Wireless outdoor sensor connect button.

Portable Comfort Control

1. Press CONNECT on the Portable Comfort Control dis-

play screen.

Fig. 44. Portable Comfort Control connect button.

2. Press DONE on the Portable Comfort Control when it

displays “Connected.”

3. Press “No” at the next screen to save and exit, or press

“Yes” if you need to connect additional thermostats to the

Portable Comfort Control. See Fig. 45.

NOTE: The Portable Comfort Control can control up to 16

thermostats.

Fig. 45. Connect additional thermostats to Portable

Comfort Control.

4. Follow the same linking procedure as above to connect

additional thermostats.

Done

MCR28847A

MCR32942

CONNECT

WIRELESS SETUP

NOYES

CONNECT MORE?

M28482

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

19 68-0311—03

ERROR MESSAGES:

E1 29: Incompatible device cannot be connected.

E1 34: Low RF signal. Move device to a different location and

try again.

E1 38: Make sure the thermostat, EIM, or TrueZONE Wireless

Adapter is in Wireless Setup mode, and the Portable Comfort

Control is at least 2 feet away (600 mm).

NOTE: The linking procedure will time out if there is no

keypress for 30 minutes. To begin again, press

and hold in the lower right corner of the screen

until the display changes (about 3 seconds). See

Fig. 46.

Fig. 46. Restarting the linking process.

RedLINK Internet Gateway

1. Press and quickly release the button on the bottom of the

Internet Gateway. After a short delay, the RedLINK sta-

tus light will glow steady green.

Fig. 47. RedLINK Internet Gateway connect button.

NOTE: The Internet Gateway must be registered online

before use at www.mytotalconnectcomfort.com.

Enter the MAC ID and MAC CRC numbers located

on the bottom of the Internet Gateway. For addi-

tional information, see instructions provided with

the device.

TrueSTEAM

1. Press and quickly release the CONNECT button on

THM4000 Wireless Adapter. After a short delay, the

CONNECTED status light will glow steady green.

Fig. 48. Connect button on TrueSTEAM wireless adapter.

Wireless Indoor Sensor

1. Press and quickly release the CONNECT button. After a

short delay, the status light (see Fig. 49) will glow green

for 15 seconds. If the status light turns red, the sensor

did not link with the thermostat.

Fig. 49. Wireless indoor sensor connect button and status

light.

NOTE: In normal operation, the status light remains off.

If it begins flashing red, batteries are low (power

will be depleted after 2–3 weeks).

2. If you are installing more than 1 wireless indoor sensor,

give each sensor a name as you install it. Press Name

Device, as shown in Fig. 50.

Fig. 50.

Press and hold

the blank space

(or arrow may be

present)

MCR32943

THM4000R1000

TrueSTEAM

MCRXXXXX

MCR32934

MCR32935

THX9321 PRESTIGE

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68-0311—03 20

3. Type the sensor name and press Done. The sensor

names are used when selecting which sensor to use for

temperature, humidification, and dehumidification con-

trol.

Fig. 51.

NOTE: If you link more than 1 wireless indoor sensor,

and forget to name them, you will be prompted

to name each wireless indoor sensor after you

exit wireless setup. See Fig. 52.

Fig. 52.

Linking Entry/Exit Remote or Vent Boost

Remote

1. Press and quickly release the CONNECT button.

Fig. 53. Connect button and status light on Entry/Exit

Remote or Vent Boost Remote.

2. After a short delay, the status light will glow green for 15

seconds. If the status light turns red, the remote did not

link with the thermostat for the connection process.

NOTE: The thermostat can work with up to 3 Entry/Exit

remotes. Each Entry/Exit remote can control up to

16 thermostats.

NOTE: The thermostat can work with up to 6 Vent Boost

remotes.

Finding Your Password (Date Code)

to Access Installer Options

You will need the thermostat password to:

• Make changes to the Installer Setup.

• Setup Diagnostics.

• Perform an Installer Test.

• View Data Logs.

• Add, remove, rename or view connected RedLINK

accessories.

• Reset the thermostat to Factory Default settings.

The password (Date Code) is located on the back of the

thermostat.

Fig. 54. Finding thermostat password.

The password (Date Code) can also be found by following

these steps:

1. Touch Menu.

2. Select Dealer Information.

Fig. 55. Finding thermostat password.

1324

1324

Password

(Date Code)

Dealer Informaon

OK

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

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21 68-0311—03

Installer Options

The following options are available when you access Installer

Options. For more information on each, press Help on the

thermostat or see Table 3.

Fig. 56. Installer Options screen.

NOTE: You can use the thermostat USB port to download

all Installer Setup settings, including your com-

pany name and contact information. You can

upload this data to each thermostat you install, to

save time.

Making Changes to Installer Setup

Follow these steps to set system options after initial

installation.

NOTE: Use a USB device to save set up time. See “USB

Port” beginning on page 119 for more informa-

tion.

1. Touch Menu.

2. Select Installer Options.

Fig. 57.

3. Enter password (Date Code) and touch Done. See “Find-

ing Your Password (Date Code) to Access Installer

Options” beginning on page 20 for more information.

Fig. 58.

4. Select Create Setup.

Fig. 59.

5. Follow prompts on the screen to select the desired setup

options. See Table 4 for Installer Setup options.

Table 3. Installer Options.

Menu Item Description

Create Setup Press CREATE SETUP to set all system

settings one by one.

View/Edit

Current Setup

Press VIEW/EDIT CURRENT SETUP to

select a specific function and make quick

changes

Set Up

Diagnostics

Press SET UP DIAGNOSTICS to set up

and test Delta T diagnostics.

Installer Test Press INSTALLER TEST to quickly

determine if the heat, cool, fan and

thermostat are operating properly. Minimum

off timers are ignored during the test

Data Logs Press DATA LOGS to view the Alerts Log,

User Interactions Log, and Performance

Logs.

Wireless Device

Manager

Press WIRELESS DEVICE MANAGER to

add, remove, rename, or view the

connected wireless accessories.

Advanced

Options

Press ADVANCED OPTIONS to setup the

thermostat using a USB device or to restore

the thermostat to the factory default

settings.

NOTE: If the THX9321 has been setup

WITHOUT an Equipment Interface Module

or the TrueZONE Wireless Adapter and you

would like to add one, you must reset the

thermostat back to factory defaults.

Installer Opons

Done

THX9321 PRESTIGE

®

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®

IAQ WITH EIM

68-0311—03 22

Table 4. Installer Setup (ISU) Table.

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

1000 Language

English

Français

Español

English Both No

1010 Application

Residential

Commercial

Residential Both No

1020 Zone Number

1-16

1 Both No This ISU is only displayed on a thermostat

that is controlling a zone panel through the

THM4000 Wireless Adapter.

1030 Device Name

[Enter Device Name]

Thermostat Both No The Portable Comfort Control remote and

Web Interface displays the name of the

thermostat that you enter on this screen.

1030 Display on Home

Screen

No

Yes

(select check box)

No Commercial No Thermostat location (name) can be

displayed on the home screen. This feature

is typically used when multiple

thermostat's are mounted in a manager's

office or equipment room. This allows you

to quickly identify which thermostat is in

control of a specific zone or area.

1040 Scheduling Options

Non-Programmable

Programmable

Programmable Both No

1050 Temperature

Indication Scale

Fahrenheit

Celsius

Fahrenheit Both No

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

23 68-0311—03

1060 Outdoor Air Sensor

No

Yes

No Both No This ISU automatically defaults to Yes

when a Wireless Outdoor Sensor is

connected.

An Outdoor Sensor is required to set the

following ISUs:

ISU 3120 Outdoor Temperature Lockouts

(Compressor Lockout and Backup Heat

Lockout)

ISU 4050 Outdoor Temperature used with

Minimum Heat Recovery Ramp Rate

ISU 4060 Outdoor Temperature used with

Maximum Heat Recovery Ramp Rate

ISU 4070 Outdoor Temperature used with

Minimum Cool Recovery Ramp Rate

ISU 4080 Outdoor Temperature used with

Maximum Cool Recovery Ramp Rate

ISU 8050 Humidification - Window

Protection

ISU 10130 Ventilation Low Temperature

Lockout

ISU 10130 Ventilation High Temperature

Lockout

ISU 10130 Ventilation High Dew Point

Lockout (requires Wireless Outdoor

Sensor)

ISU 13070 Allow Heat Delta T Diagnostics

when Outdoor Temperature is [Out. Temp.

Range]

ISU 13080 Allow Heat Delta T Diagnostics

when Outdoor Humidity is [Out. Humidity

Range]

ISU 13110 Allow Backup Heat Delta T Diag.

when Outdoor Temperature is [Out. Temp.

Range]

ISU 13120 Allow Backup Heat Delta T

Diagnostics when Outdoor Humidity is

[Out. Humidity Range]

ISU 13150 Allow Cool Delta T Diagnostics

when Outdoor Temperature is [Out. Temp.

Range]

ISU 13160 Allow Cool Delta T Diagnostics

when Outdoor Temperature is [Out.

Humidity Range]

2000 Heating System

Type

Conventional Forced Air Heat

Heat Pump

Radiant Heat

Other

None (Cool Only)

Conventional

Forced Air Heat

Both No

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 24

2010 Heating Equipment

Type

Conventional Forced Air Heat:

Standard Efficiency Gas Forced Air

High Efficiency Gas Forced Air

Oil Forced Air

Electric Forced Air

Hot Water Fan Coil

Other

Heat Pump:

Air to Air Heat Pump

Geothermal Heat Pump

Geothermal Radiant Heat

Radiant Heat:

Hot Water Radiant Heat

Geothermal Radiant Heat

Steam

Other

Other:

Gravity

Other

Default varies

based on

previous

selections

Both No Cycle Rate and Fan Operation automatically

default to the correct settings based on the

equipment type selected.

This ISU is not displayed when ISU 2000

Heating System Type is set to None (Cool

Only).

See “Geothermal Radiant Heat” beginning

on page 100.

2030 What Terminals are

Wired to Radiant

Heat?

None

U1

U2

U3

Default varies

based on

previous

selections

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Geothermal

Radiant Heat.

Geothermal Radiant Heat must be wired to

a universal terminal (U1, U2, or U3).

U1, U2 and U3 are normally open dry

contacts when configured for a stage of

Heat. U1, U2 and U3 require power from

the system transformer or a separate

transformer.

U3 is only available on the Equipment

Interface Module (EIM).

2040 What Terminals are

Wired to Radiant

Heat - Stage 2?

None

U1

U2

U3

Default varies

based on

previous

selections

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Geothermal

Radiant Heat.

Geothermal Radiant Heat must be wired to

a universal terminal (U1, U2, or U3).

U1, U2 and U3 are normally open dry

contacts when configured for a stage of

Heat. U1, U2 and U3 require power from

the system transformer or a separate

transformer.

U3 is only available on the Equipment

Interface Module (EIM).

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

25 68-0311—03

2050 Geothermal Forced

Air System

None

Used for Cooling Only

Used for Heating and Cooling

Used for

Heating and

Cooling

Both No This thermostat has the capability of

controlling Geothermal Radiant Heat,

Geothermal Forced Air and Backup Heat.

If this thermostat is not controlling the

Geothermal Forced Air System, select

None. This setting is typically used if the

thermostat is only controlling Geothermal

Radiant Heat.

If this thermostat is using the Geothermal

Forced Air System for cooling and not for

heating, select Used for Cooling Only.

If this thermostat is using the Geothermal

Forced Air System for both heating and

cooling, select Used for Heating and

Cooling.

2060 Reversing Valve

O/B

O (O/B on Cool)

B (O/B on Heat)

O/B on Cool Both No Only displayed if the equipment type is Air

to Air Heat Pump, Geothermal Heat Pump

or Geothermal Radiant Heat.

2070 Cool Stages /

Compressor

Stages

1-4

1 if ISU 1010 is

Residential

2 if ISU 1010 is

Commercial

Both No Conventional:

Cool Stage 3 and 4 are only available if ISU

1010 is Commercial.

Cool Stage 3 and 4 must be wired to a

universal terminal (U1, U2 or U3).

Heat Pumps:

Maximum of 2 Compressor Stages for heat

pump systems.

2020,

2070

Heat Stages /

Backup Heat

Stages

1 - 3

Default is 1

stage if ISU

1010

Application is

Residential

Default is 2

stages if ISU

1010

Application is

Commercial

Both No Maximum of 3 Heat Stages for

conventional systems.

Maximum of 2 Backup Heat Stages for

systems with more than 1 heating

equipment type.

2080 What Terminals are

Wired to Cool -

Stage 3?

None

U1

U2

U3

Default varies

based on

previous

selections

Commercial No Cool Stage 3 is only available if ISU 1010 is

Commercial.

Cool Stage 3 must be wired to a universal

terminal (U1, U2 or U3).

U1, U2 and U3 are normally open dry

contacts when configured for a stage of

Cool. U1, U2 and U3 require power from a

system transformer or a separate

transformer.

U3 is only available on the Equipment

Interface Module (EIM).

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 26

2090 What Terminals are

Wired to Cool -

Stage 4?

None

U1

U2

U3

Default varies

based on

previous

selections

Commercial No Cool Stage 4 is only available if ISU 1010 is

Commercial.

Cool Stage 4 must be wired to a universal

terminal (U1, U2 or U3).

U1, U2 and U3 are normally open dry

contacts when configured for a stage of

Cool. U1, U2 and U3 require power from a

system transformer or a separate

transformer.

U3 is only available on the Equipment

Interface Module (EIM).

2100 What Terminals are

Wired to Heat -

Stage 3?

None

U1

U2

U3

Default varies

based on

previous

selections

Both No THX9321 Thermostat Only:

This ISU is only displayed on the THX9321

thermostat when it is wired directly to the

equipment (Equipment Interface Module is

NOT used).

Heat Stage 3 must be wired to a universal

terminal (U1 or U2).

U1 and U2 are normally open dry contacts

when configured for a stage of Heat. U1

and U2 require power from a system

transformer or a separate transformer.

2110 Fan Operation in

Heat

No Fan

Equipment Controls Fan

Thermostat Controls Fan

Thermostat

Controls Fan

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Electric Forced

Air, Hot Water Fan Coil or Other.

The thermostat automatically defaults to

Equipment Controls Fan when ISU 2010

Heating Equipment Type is Standard

Efficiency Gas Forced Air, High Efficiency

Gas Forced Air or Oil Forced Air.

No Fan is only displayed when ISU 2010

Heating Equipment Type is Other.

2120 Backup Heat Type

None

Standard Efficiency Gas Forced Air

High Efficiency Gas Forced Air

Oil Forced Air

Electric Forced Air

Hot Water Fan Coil

Hot Water Radiant Heat

Other

None Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Hot Water

Radiant Heat, Steam, Hot Water Fan Coil,

Electric Forced Air or Other.

The list of Backup Heat Types will vary

based on the type of primary heat selected

at ISU 2010 Heating Equipment Type.

When ISU 2010 Heating Equipment Type is

Hot Water Radiant Heat, the thermostat

keeps the Hot Water Radiant Heat on when

it calls for Backup Heat.

When ISU 2010 Heating Equipment Type is

Steam, the thermostat keeps the Steam

Heat on when it calls for Backup Heat.

When ISU 2010 Heating Equipment Type is

Hot Water Fan Coil, Electric Forced Air or

Other, you can select how the backup

operates. See ISU 2150 Backup Heat

Operation.

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

27 68-0311—03

2130 Backup Heat

Stages

0 - 2

1 Both No This ISU is only displayed when a backup

heat source is selected at ISU 2120 Backup

Heat Type.

Maximum of 2 Backup Heat stages.

2140 What Terminals are

Wired to Backup

Heat?

None

U1

U2

Default varies

based on

previous

selections

Both No THX9321 Thermostat Only:

This ISU is only displayed on the THX9321

thermostat when it is wired directly to the

equipment (Equipment Interface Module is

NOT used).

The thermostat can support up to 3

conventional heat stages. When there are a

total of 3 conventional heat stages, the last

stage of heat must be wired to U1 or U2.

U1 and U2 are normally open dry contacts

when configured for a stage of Heat. U1

and U2 require power from a system

transformer or a separate transformer.

2150 Backup Heat

Operation

NOT Allowed to Run with Primary

Heat

Allowed to Run with Primary Heat

NOT allowed to

run with

Primary Heat

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Hot Water Fan

Coil, Electric Forced Air or Other.

When ISU 2010 Heating Equipment Type is

Hot Water Fan Coil, Electric Forced Air or

Other, you can select how the Backup Heat

operates. The thermostat can be setup to

keep the primary heat source on when it

calls for Backup Heat or the thermostat can

be setup to turn off the primary heat source

when it calls for Backup Heat.

When ISU 2010 Heating Equipment Type is

Hot Water Radiant Heat, the thermostat

keeps the Hot Water Radiant Heat on when

it calls for Backup Heat.

When ISU 2010 Heating Equipment Type is

Steam, the thermostat keeps the Steam

Heat on when it calls for Backup Heat.

2160 Backup Heat Fan

Operation

No Fan

Equipment Controls Fan

Thermostat Controls Fan

Thermostat

Controls Fan

Both No This ISU is only displayed for conventional

systems when ISU 2120 Backup Heat Type

is Electric Forced Air, Hot Water Fan Coil

or Other.

Backup Heat Fan Operation automatically

defaults to Equipment Controls Fan when

ISU 2120 Backup Heat Type is Standard

Efficiency Gas Forced Air, High Efficiency

Gas Forced Air or Oil Forced Air.

No Fan is only displayed when ISU 2120

Backup Heat Type is Other.

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 28

2170 What Terminals are

Wired to Backup

Heat - Stage 2?

None

U1

U2

Default varies

based on

previous

selections

Both No THX9321 Thermostat Only:

This ISU is only displayed on the THX9321

thermostat when it is wired directly to the

equipment (Equipment Interface Module is

NOT used).

The thermostat can support up to 2 backup

heat stages for heat pump applications.

When there are 2 backup heat stages,

backup heat stage 2 must be wired to U1 or

U2.

U1 and U2 are normally open dry contacts

when configured for a stage of Heat. U1

and U2 require power from a system

transformer or a separate transformer.

2180 Backup Heat Type

Electric Forced Air

Standard Efficiency Gas Forced Air

High Efficiency Gas Forced Air

Oil Forced Air

Hot Water Fan Coil

Hot Water Radiant Heat

Other

Electric Forced

Air

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Air to Air Heat

Pump, Geothermal Heat Pump or

Geothermal Radiant Heat and there is at

least one stage of backup heat.

See “Heat Pump and Backup Heat

Operation” beginning on page 100.

2190 External Fossil Fuel

Kit

Thermostat Controls Backup Heat

External Fossil Fuel Kit Controls

Backup Heat

Thermostat

Controls

Backup Heat

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Air to Air Heat

Pump, Geothermal Heat Pump or

Geothermal Radiant Heat and ISU 2180

Backup Heat Type is Standard Efficiency

Gas Forced Air, High Efficiency Gas

Forced Air or Oil Forced Air.

2200 Backup Heat

Operation

NOT allowed to Run with Heat

Pump

Allowed to Run with Heat Pump

Default varies

based on

previous

selections

Both No This ISU is only displayed when ISU 2010

Heating Equipment Type is Air to Air Heat

Pump, Geothermal Heat Pump or

Geothermal Radiant Heat and ISU 2180

Backup Heat Type is Hot Water Fan Coil or

Other.

Not Allowed to Run with Heat Pump: The

thermostat turns off the heat pump when it

calls for backup heat.

Allowed to Run with Heat Pump: The

thermostat keeps the heat pump on when it

calls for backup heat.

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

29 68-0311—03

2210 Backup Heat Fan

Operation

No Fan

Equipment Controls Fan

Thermostat Controls Fan

Default varies

based on

previous

selections

Both No This ISU is only displayed for heat pumps

when ISU 2180 Backup Heat Type is Other.

Backup Heat Fan Operation:

Electric Forced Air: Thermostat Controls

Fan

Standard Efficiency Gas Forced Air:

Equipment Controls Fan

High Efficiency Gas Forced Air: Equipment

Controls Fan

Oil Forced Air: Equipment Controls Fan

Hot Water Fan Coil: Thermostat Controls

Fan

Hot Water Radiant Heat: Not Applicable

2220 A-L/A Terminal

Setup

None

Time Of Day

Economizer

Heat Pump Failure Indication

None Commercial No This ISU is only displayed when ISU 1010

Application is Commercial.

Note: When the thermostat is setup for

Residential, the L/A terminal operates as

described under “Heat Pump Failure

Indication.” The L/A terminal requires no

setup for residential applications.

None: The A-L/A terminal is not used.

Time of Day: The A-L/A terminal is

energized during Occupied periods and

when the user overrides the temperature.

The terminal is de-energized during

Unoccupied periods and in Standby mode.

Economizer: The thermostat controls an

economizer module to provide ventilation

during Occupied periods and free cooling

when outdoor conditions are favorable. The

A-L/A terminal is energized during

Occupied periods and during a call for

cooling in Unoccupied periods. See

“Economizer and Time of Day (TOD)

Operation” beginning on page 126.

Notes: The economizer module determines

when outdoor conditions are favorable for

free cooling. Delta T Diagnostics is not

available when the thermostat is setup for

an Economizer.

Heat Pump Failure Indication: When 24

volts is detected on the L/A terminal

(compressor monitor), the thermostat

displays a message to alert the user when

the heat pump requires service. The L/A

terminal sends a continuous output to a

zone panel when the thermostat is set to

Emergency Heat mode. The zone panel will

not turn on the heat pump when a zone is

set to Emergency Heat mode.

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes

THX9321 PRESTIGE

®

2.0 AND THX9421 PRESTIGE

®

IAQ WITH EIM

68-0311—03 30

3000 Changeover

Manual

Automatic

Manual:

if ISU 1010 is

Residential

Automatic:

if ISU 1010 is

Commercial

Both No Manual: The user must select heating or

cooling as needed to maintain the desired

indoor temperature.

Automatic: The user has the option to

select Auto for the system setting. In Auto

mode, the thermostat controls heating and

cooling equipment as needed to maintain

the desired indoor temperature.

3000 Deadband

2° F to 9° F (in 1° F increments)

3° F Both No This ISU is only displayed when ISU 3000

is set to Automatic.

Deadband is the minimum separation

between heat and cool settings when the

thermostat is setup for 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. If the

heat setpoint is adjusted above 72° F, it will

automatically adjust the cooling setpoint

higher to maintain the 3° F deadband.

When ISU 9070 (Dehumidification - Over

Cooling Limit) or ISU 9100 (High Humidity

Comfort Reset Setting) is set to 1, 2, 3, 4 or

5° F, the thermostat will not show the full

Deadband range. For example, if you set a

Deadband of 3° F and an Over Cooling

Limit of 2° F, the minimum Deadband that

you can select will be 5 F. This prevents the

heating system from turning on when the

thermostat over cools to reach the

dehumidification setting.

3010 Temperature

Control Options

Basic Options

Advanced Options

Advanced Options + PID Settings

Basic Options Both No Basic Options: The Installer Setup displays

basic temperature control options which

include Backup Heat Differential, Backup

Heat Upstage Timer and Outdoor

Temperature Lockouts. Note: Outdoor

Temperature Lockouts only apply to Heat

Pump applications.

Advanced Options: The Installer Setup

displays both Basic and Advanced Options.

Advanced temperature control options

include Finish With High Cool Stage, Finish

With High Heat Stage, Temperature

Differential settings between all stages and

Cycle Rate settings per stage.

Advanced Options+PID Settings: The

Installer Setup displays both Basic and

Advanced Options including PID settings

which allow you to adjust the integral,

derivative and throttling range.

Table 4. Installer Setup (ISU) Table. (Continued)

ISU

Number

Installer Setup

Name Settings Default

Residential,

Commercial

or Both

Requires

EIM Notes