Honeywell THX9421R5021WW - Manual

Page 2 - Reference to key features

2 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...

Page 3 - Installing the equipment interface module (EIM); Terminal Designations

3 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...

Page 4 - Wiring dry contact devices to display alerts; DISCONNECT POWER BEFORE INSTALLATION.

4 Terminal Designations Conventional System Heat Pump Terminal Description Terminal Description U1 / U1** U2 / U2** U3 / U3** Relay for humidification, dehumidification, ventilation, or a stage of heating/cooling. U terminals are dry contacts that require power. U1 / U1** U2 / U2** U3 / U3** Relay f...

Page 5 - Wiring humidification, dehumidification and ventilation

5 POWERED HUMIDIFIER RHRCRC U3U3U2U2U1 U1 M32393A 24 VAC 120 VAC 24 VAC 120 VAC 24 VAC 1 FIELD INSTALLED JUMPER BETWEEN R AND U1 RHRCRC 24 VAC U3U3U2U2U1 U1 NON-POWERED HUMIDFIER MCR32397B 24 VAC 120 VAC 1 POWERED VENTILATOR RHRCRC 24 VAC U3 U3U2 U2 U1 U1 M32396A 24 VAC 120 VAC 24 VAC 120 VAC 1 POWE...

Page 6 - Coin; Installing the thermostat

6 MCR34222 2.1 Separate wallplate from thermostat. 2.2 Mount wallplate as shown. Mount new wallplate using screws and anchors included with the thermostat.Drill 3/16-in holes for drywall. Drill 7/32-in holes for plaster. 2.3 Connect power to thermostat. 2.3a Connect thermostat to the R and C termina...

Page 7 - Powering optional RedLINK 2.0 accessories; Mount thermostat on

7 3.1 Install batteries in RedLINK 2.0 accessories. • Portable Comfort Control*• Wireless Outdoor Sensor*• Wireless Indoor Sensor*• Wireless Entry/Exit Remote*• Wireless Vent and Filter Boost Remote* * Requires setup. See Installer Setup options in Step 4.5. 3.2 Connect gateway to internet and conne...

Page 8 - Performing initial setup; Link the thermostat to the; If

8 4 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) 4.2 Link the thermostat to th...

Page 9 - Done; thermostat setup is

9 4.3 When you see the prompt Do you have RedLINK 2.0 accessories to connect? Touch Yes or No . • If you select Yes , you will be prompted to Press Connect on all new accessories. Continue to Step 4.4. • If you select No , continue to Step 4.5. 4.4 Connect each RedLINK 2.0 accessory. NOTE: Make sure...

Page 10 - Finding your password; You can find the Date Code on; Menu; Select; Dealer Information; Password

10 5 Finding your password (Date Code) • To add or remove RedLINK 2.0 accessories • To make changes to Installer Setup • To perform Installer Test • To view Data Logs Finding your password You can find the Date Code on the back of the thermostat, or 1 Touch Menu . 2 Select Dealer Information . Deale...

Page 11 - Accessories; Press and quickly release; Linking RedLINK 2.0 accessories to the

11 1 Touch Menu . 2 Select Installer Options . 3 Enter password (date code) and touch Done . 4 Select Wireless Device Manager . 5 Select Add Device to display the Add Device screen. The thermostat is now in listening mode. NOTE: Accessories must be at least 2 feet away from the EIM during the linkin...

Page 12 - Mounting an outdoor sensor

12 Making changes to Installer Setup and performing Installer Test Mounting outdoor and indoor sensors Follow these steps to set system options after initial installation. NOTE: Use a USB device to save set up time. See page 14. 1 Touch Menu . 2 Select Installer Options . 3 Enter password (date code...

Page 13 - Indoor sensor operation; Mounting an indoor sensor

13 Indoor sensor operation Mounting an indoor sensor 1 Remove the wallplate and mount it 4 to 6 feet above the floor on an interior wall. Drill 3/16-inch holes for drywall, 7/32-inch for plaster. 2 Attach sensor securely to wallplate as shown. Temperature control The thermostat can be set to respond...

Page 14 - Using a USB device for setup, data logs and software upgrades; Load into Thermostat; At the Portable Comfort Control:; To replace a thermostat

14 Using a USB device for setup, data logs and software upgrades NOTE: Modern USBs with over 8 MB may have compatibility issues. Use a USB device to save set up time by loading Installer Setup settings, Dealer Information, Holiday Schedules, and Custom Reminders to multiple thermostats. For troubles...

Page 15 - Specifications and replacement parts; Operating Ambient Temperature; Electrical; Accessories and replacement parts

15 Specifications and replacement parts Operating Ambient Temperature Thermostat: 32 to 120° F (0 to 48.9° C) Portable Comfort Control: 32 to 120° F (0 to 48.9° C) Wireless Outdoor Sensor: -40 to 140° F (-40 to 60° C) Wireless Indoor Sensor: 0 to 120° F (-17.8 to 48.9° C) -For Optimal Battery Life: ...

Page 16 - Can cause electrical shock or; Must be installed by a trained, experience technician.; Read these instructions; For assistance please visit; Scan for more information

69-2739-09 TM Resideo Inc., 1985 Douglas Drive NorthGolden Valley, MN 55422 www.resideo.com 69-2739—09 SA Rev. 0 6 -23 | Printed in United States ©2023 Resideo Technologies, Inc. This product is manufactured by Resideo Technologies, Inc., Golden Valley, MN, 1-855-733-5465. The Honeywell Home tradema...

Honeywell THX9421R5021WW - Manual

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