Honeywell THX9321/9421 Prestige IAQ and RF EIM Manual

About Honeywell THX9321/9421 Prestige IAQ and RF EIM Manual

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™ humidifier with Wireless Adapter, TrueZONE™ zoning panel with Wireless Adapter, Vent Boost Remote and Wireless Remote.

Customizable Service Reminders

Set up to 10 service reminders. Choose from the pre-set options or customize your own. Reminders based on date, outdoor temperature or a dry contact input will alert customers with instructions to contact you for assistance.

Delta T Alerts and Diagnostics

Alerts give customers a sense of security while also enabling 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 operating as expected. The system alert will instruct customers to contact you for assistance. Requires EIM.

Delta T Installer Test

Save time by viewing Delta T while running a system test to verify proper operation. Requires EIM.

Universal Inputs – S1 and S2

Assignable inputs allow you to configure 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 EIM.

User Interaction Log

The interaction log stores history of thermostat setting changes including temperature, system and installer setup. You can use the interaction log to save time by determining if the issue is a system error or an accidental user error.

Configurable for Residential and Light Commercial Applications

One thermostat does it all to meet the needs of Residential and Light Commercial applications. Simply select Residential 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.

Equipment Setup Wizard

The thermostat installer uses plain language and simple questions to guide you through the set-up process. Settings are automatically modified according to the type of equipment selected, helping to eliminate common installation errors.

Selectable Sensors

When paired with a Wireless Indoor Sensor(s) you have the ability to choose which sensor(s) to use for temperature, humidification and dehumidification. They can be used in combination for temperature averaging—or individually—to condition humidity levels in separate spaces.

Honeywell THX9321/9421 With wireless accessories

Control for up to 4 Heat/2 Cool heat pump systems or up to 3 Heat/2 Cool conventional systems for residential and commercial applications.

Installation guide for:

  • Prestige THX9321/9421 thermostat
  • Equipment Interface Module (EIM)
  • Portable Comfort Control
  • Wireless Outdoor Sensor
  • Wireless Indoor Sensor
  • RedLINK™ Internet Gateway

Honeywell THX9321/9421 Quick start guide

1 Install thermostat............................................................page 3
2 Install optional Equipment Interface Module (EIM)......................3
3 Power optional accessories.....................................................4
4 Link thermostat to wireless network..........................................5
5 Link optional accessories to wireless network...........................6
6 Install optional sensors...........................................................7
7 Customize thermostat (installer options)...................................8
Wiring guides......................................................................10-17
Key features........................................................................18-25
Device replacement and specifications...................................26-27

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Honeywell THX9321/9421 Prestige IAQ and RF EIM Manual