Honeywell YTHX9421, THX9421R5021WW User Manual

Prestige® IAQ with Equipment Interface Module

Installation Guide

TM

RedLINK to Equipment Interface Module

TM

2 Wires for Power

OR

RedLINK to TrueZONE Wireless Adapter

TM

2 Wires for Power

Reference to key features

Current display. Button pressed in signifies current display

Mode control buttons. Use to change settings for Fan or System Heat/Cool.

Menu. Select options to: set schedules, view equipment status, change IAQ settings, access installer options*, etc.

Current schedule. Shows desired temperature and schedule status.

Indoor conditions. Shows indoor temperature and humidity.

Current date and time.

Current status. Shows system mode

(heat/cool), outdoor temperature and humidity (with optional outdoor sensor).

* Password is date code.

Getting started

Follow these basic steps to install this thermostat, link it with the equipment interface module (EIM) and wireless accessories and set installer options.

Installing the Equipment Interface

1

Module (EIM)

Installing the thermostat

2

Powering optional RedLINK accessories

3

Performing initial setup

4

Finding your password (Date Code)

5

• To add or remove RedLINK accessories

• To make changes to Installer Setup

• To perform an Installer Test

• To view Data Logs

USB port. Use USB device to load settings and dealer information.

Thermostat (back view)

1624

Password (Date Code)

1624

2

Installing the equipment interface module (EIM)

1

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

NOTE: When installing multiple

thermostats and EIMs, mount the EIMs at least 2 feet apart for best RedLINK performance.

1.1 Mount EIM. Mount the EIM near the HVAC equipment or on the equipment itself.

Use screws and anchors as appropriate for the mounting surface.

1.2 Wire EIM as shown. Refer to the table and wiring diagrams on pages 35.

NOTE: If you are installing discharge and return air sensors, refer to the

mounting instructions in the Alerts and Delta T Diagnostics Installation Instructions packed in the kit.

R

C

W

O/B

W2

AUX1

W3

AUX2

Y

Y2

G

A

L/A

Terminal Designations

Conventional System Heat Pump

Terminal Description Terminal Description

R*

Common wire from 24 VAC

C

transformer.

Power wire from 24 VAC transformer.

Common wire from 24 VAC

C

transformer.

Power wire from 24 VAC

R

transformer.

RH* Heating power. RH Heating power.

RC* Cooling power. RC Cooling power.

W Heat Stage 1 O/B Changeover valve for heat pumps.

W2 Heat Stage 2 AUX 1

W3 Heat Stage 3 AUX 2

Backup Heat Stage 1/Emergency Heat Stage 1

Backup Heat Stage 2/Emergency Heat Stage 2

Y Compressor Stage 1 Y Compressor Stage 1

Y2 Compressor Stage 2 Y2 Compressor Stage 2

G Fan Relay G Fan Relay

Connect to Economizer Module or

A

Lighting Panel (TOD).

L/A

Connect to Compressor Monitor, Zone Panel, Economizer Module or Lighting Panel (TOD).

* Remove jumpers when separate transformers are used.

3

Terminal Designations

2

ONE DRY CONTACT DEVICE

Conventional System Heat Pump

Terminal Description Terminal Description

Universal relay for humidification, dehumidification, ventilation, or a stage of heating/cooling. U terminals are dry contacts that require power.

Universal input for a wired indoor sensor, outdoor sensor, discharge sensor, return sensor, dry contact device for alerts or dry contact device for remote setback.

U1 / U1** U2 / U2** U3 / U3**

S1 / S1*** S2 / S2*** S3 / S3*** S4 / S4***

Universal relay for humidification, dehumidification, ventilation, or a stage of heating/cooling. U terminals are dry contacts that require power.

Universal input for a wired indoor sensor, outdoor sensor, discharge sensor, return sensor, dry contact device for alerts or dry contact device for remote setback.

U1 / U1** U2 / U2** U3 / U3**

S1 / S1*** S2 / S2*** S3 / S3*** S4 / S4***

A B C D

** See wiring diagrams on pages 45. *** See wiring diagram below for wiring Dry Contact Devices to display alerts.

Connect to THM4000R1000 Wireless Adapter for extended wireless range.

A B C D

Connect to THM4000R1000 Wireless Adapter for extended wireless range.

Wiring dry contact devices to display alerts

DISCONNECT POWER BEFORE INSTALLATION. Do not apply power to S1, S2, S3 or S4 terminals.

NOTE: The dry contact device must

EIM

be rated for low voltage.

MULTIPLE DRY CONTACT DEVICES

Connect a dry contact device such as a water sensor to S1, S2, S3 or S4 terminals. The thermostat displays an alert when a problem is detected.

Connecting a stage of heating or cooling to a universal relay (U1, U2, U3)

U3

1

U1, U2, and U3 are normally open dry contacts when set up for a stage of heating or cooling.

You must install a ﬁeld jumper if the stage of heating or cooling is powered by the system trans-

1

former. Do NOT install a ﬁeld jumper if the stage of heating has its own transformer.

4

VAC

U3

U2

HEAT STAGE 3,

U2

COOL STAGE 3,

COOL STAGE 4 OR

U1

GEOTHERMAL

RADIANT HEAT

U1

2

RH

RC

R

24

C

ON ONE SET OF TERMINALS

TRANSFORMER

24

VAC

120 VAC

VA

24

VA

24

1

2

Wiring humidification, dehumidification and ventilation

Typical hookup of powered humidiﬁer Typical hookup of non-powered

humidiﬁer

U3

1

U3 U2

U2

U1

POWERED

HUMIDIFIER

U1

RH

RC

R

24

C

VAC

24

VAC

24

120

VAC

120

VAC

Typical hookup of powered ventilation

U3

1

U3 U2

U2

U1

POWERED

VENTILATOR

U1

RH

RC

R

24

C

VAC

24

VAC

24

120

VAC

120 VAC

Typical hookup of powered dehumidiﬁer (whole house dehumidifer)

U3

1

U3

U2

U1

POWERED

DEHUMIDIFIER

U1

RH

RC

R

24

C

VAC

24

VAC

24

VAC

120 VAC

120

Typical hookup of variable speed blower for dehumidiﬁcation in low speed

U3

1

U3 U2

U2

NON-POWERED

U1

HUMIDFIER

U1

RH

RC

R

VAC

24

VAC

C

120 VAC

FIELD INSTALLED JUMPER BETWEEN R AND U1

Typical hookup of non-powered ventilation

U3

1

U3 U2

U2

NON-POWERED

U1

VENTILATOR

VAC

OR

24 VAC

U1

RH

RC

R

C

24

VAC

U3

1

U3 U2

U2

U1

WITH LOW SPEED FAN

U1

RH

RC

R

C

DEHUMIDIFICATION

120 VAC

24

VAC

FIELD INSTALLED JUMPER BETWEEN R AND U1

2

FIELD INSTALLED JUMPER BETWEEN R AND U1

120 VAC

Any combination of universal relays (U1, U2, U3) can be used. They are set in the thermostat installer setup.

Wire the universal EIM relay to the low speed fan for dehumidiﬁcation control at the equipment. The EIM relay can be set to be normally open or normally closed in the thermostat installer setup.

Normally open, dry contacts

Normally closed, dry contacts

5