THX9421R5021WW
THX9421R5021WW
Prestige 2-Wire IAQ High Definition
Color Touchscreen Thermostat, White Front/White Side
RedLINK™ Enabled
Overview:
The Prestige® IAQ thermostat is a 2-wire high definition color touch
screen thermostat, 7 day programmable and selectable for residential
or light commercial use. Controls up to 4 stages of heat and 2 stages
of cool in a heat pump system and up to 3 stages of heat and
2 stages of cool in a conventional system. 3 sets of universal IAQ
controls control humidification, dehumidification and ventilation.
4 sensor inputs for wired sensors or dry contact devices.
Works with the Equipment Interface Module and RedLINK®
accessories including the RedLINK® Internet Gateway, Portable Comfort Control, Wireless Outdoor
Sensor and Wireless Indoor Sensor.
Features:
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Control heating, cooling and IAQ equipment with only 2 wires at the thermostat. Heating, cooling and IAQ equipment
wire to the Equipment Interface Module.
Smart Schedule – programs in seconds for any lifestyle.
Patented interview based programming and installer setup.
RedLINK™ wireless communication.
Increase profit per job by including RedLINK™ accessories that provide comfort and convenience. RedLINK™
accessories include the RedLINK™ Internet Gateway, Portable Comfort Control (PCC), Wireless Outdoor Sensor,
Wireless Indoor Sensor, Wireless Entry/Exit Remote, Wireless Vent and Filter Boost Remote, TrueSTEAM™
humidifier with wireless adapter and TrueZONE® zoning pales with wireless adapter.
Selectable for residential and light commercial applications. Meets commercial code and Title 24 compliant.
Light commercial – commercial language (occupied and unoccupied), schedule holidays and custom events, remote
setback, economizer and time of day.
Delta T Alerts and Diagnostics inform customer when their system is not performing as expected with instructions to
contact the dealer. Provides a sense of security and greater comfort while generating repeat business.
All Prestige IAQ kits come standard with a return and discharge air temperature sensor to measure Delta T.
Alerts and User Interactions Log – Keeps a searchable history of alerts and setting changes to the thermostat to
determine if there is a system malfunction or if the issue was cause by user error. Saves time in troubleshooting and
points technician in the right direction.
Performance Logs – Keeps a history of heating and cooling performance. The log includes MIN/MAX records of
Delta T, discharge temperature, return temperature, indoor temperature/humidity, outdoor temperature/humidity and
run time. Quickly determines if the system is performing as expected and reduces service time on the job.
Customizable Service Reminders allow dealers to remind customer when it’s time to call for service, when a warranty
is expiring and provides customizable alerts.
USB port for transferring Installer Setup, customizable reminders, custom events and holidays to multiple
thermostats.
USB port for adding the dealer’s full color business logo on the screen.
3 assignable outputs to control humidification, dehumidification, ventilation and a stage of heating or cooling.
4 assignable inputs on the Equipment Interface Module can be used with wired outdoor, indoor or discharge sensors,
occupancy sensor for remote setback and dry contact devices to trip pre-packaged or custom alerts such as a full
drain pan or water leak.
Extend wireless range of the Equipment Interface Module by connecting a THM4000R1000 Wireless Adapter to the
ABCD terminals.
Tri-lingual – English, French and Spanish display options.
Precise temperature control (1F) for reliable and consistent temperature.
Multiple staging options to provide or energy savings.
Product Specifications:
Hazmat Information
UN 3091 Lithium metal batteries packed with equipment
Application
Up to 4 Heat/2 Cool heat pumps, up to 3 Heat/2 Cool conventional systems
Dimensions
3-1/2” H x 4-1/2” W x 7/8” D
Used with
THM5421R1021 Equipment Interface Module and RedLINK™ accessories
Comments
Tri-Lingual display (select English, French or Spanish)
Electrical Ratings
18 to 30 VAC
Frequency
50 Hz, 60 Hz
Electrical Connections
Screw terminals
Switch Positions (system)
HEAT-OFF-COOL-AUTO-EM.HEAT
Switch Positions (fan)
AUTO-ON-CIRC-FOLLOW SCHEDULE
Color
White front, white side
Programmability
7-Day multiple day or non-programmable
Power Method
Hardwired
Terminal Designations
R, C then RedLINK to Equipment Interface Module
Display
8.06 sq. in.
Changeover
Auto or manual
Humidification Setting Range
Cooling: 40 to 80% RH, Heating: 10 to 60% RH
Dehumidification Setting Range
40 to 80% RH
External Sensors Available
N/A
Wi-Fi / RedLINKTM Complementary Solutions
Web / Phone App
Applications
Yes
RedLINK Internet Gateway
Honeywell Total Connect Comfort
Residential & Light Commercial
Home Automation Equipment + RedLINK Accessories
RedLINKTM
5
Yes
Homeowner’s Existing Wireless System
Honeywell Total Connect Comfort
Residential
Single-Point Control to Equipment
Wi-Fi
Now you can expand your business and offer your customers the Wi-Fi VisionPRO® thermostat from Honeywell, a trusted name and
leader of thermostats. This chart compares the various features and benefits of RedLINK and Wi-Fi and to find the right products for
either technology.
FCC Compliant
2*
Standard Backlit Green
Features
Wires
HD Color or Standard Backlit Green
Internet Gateway
RF Strength
Control Capabilities
Set-up Time
Display
*Only available on Prestige IAQ
Wi-Fi FocusPRO®
thermostat
No
Wi-Fi VisionPRO®
thermostat
Yes*
Wireless
FocusPRO®
Diagnostics
All New
VisionPRO®
No
Prestige® 2.0
Comfort System
Yes
Redesigned
Prestige IAQ
Interview Programming
Compatible Thermostats
50-1863 RL
March 2013
© 2013 Honeywell International, Inc.
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