Honeywell Home · Standalone
Prestige IAQ YTHX9421R5085WW Thermostat Kit
White Prestige IAQ kit containing a thermostat, equipment interface module and two duct sensors.
Will this work with my system?
Match your equipment to these requirements before ordering.
Works with
- Staging: Heat pump: Up to 4 heat / 2 cool; Conventional: Up to 3 heat / 2 cool
System requirements
- Power: 18–30 Vac hardwired
Check before you buy
- Match the full YTHX9421R5085WW model number and hardware revision to the manufacturer's equipment manual and accessory list.
- Compare the equipment terminals, control voltage and required operating sequence with the model-specific installation diagrams.
Installation & configuration details
- This kit already includes THM5421R1021 and two duct sensors. Do not order a second interface module for initial kit installation.
- The listed wireless sensors, portable control and Internet gateway are separate optional accessories.
Manufacturer documentation (2)
Use these documents to compare your exact model and configuration.
Overview
Part of the Honeywell Home RedLINK system. See the system overview for component roles and selection requirements.
This kit combines the white-front, white-side THX9421R5021WW thermostat with the interface module that connects to the HVAC equipment. Two wires provide thermostat power; RedLINK carries communications to the EIM. The kit supports seven-day or non-programmable operation and configuration for residential or light-commercial systems. Check the installer guide for IAQ equipment and sensor configuration.
Selection and installation
Use the linked manufacturer documentation for the exact equipment configuration, wiring and commissioning requirements. Accessories and controls must be matched by model and electrical characteristics.
Product details
- Manufacturer
- Resideo
- SKU
- 365480
- Model / MPN
- YTHX9421R5085WW
- Condition
- New
- Lifecycle
- Current
Specifications
- Included items
- THX9421R5021WW; THM5421R1021; Two duct sensors
- Stage modes
- Heat pump: Up to 4 heat / 2 cool; Conventional: Up to 3 heat / 2 cool
- Power sources
- 18–30 Vac hardwired
Documents & downloads
- Installation guide (PDF)
Installation Guide for Prestige IAQ with Equipment Interface Module (English) (PDF)
- User guide (PDF)
User Guide for Prestige® Touch Screen Thermostat (English) (PDF)
- Technical data sheet (PDF)
Product Data for THX9321 Prestige® 2.0 and THX9421 Prestige® IAQ with EIM (English) (PDF)
Optional components
Honeywell Home
C7189R1004 Wireless Indoor Sensor
Model C7189R1004 SKU 365484
Wireless temperature and humidity sensor for compatible RedLINK 2.0 thermostats.
- Measured variables
- Indoor temperature and relative humidity
- Communication protocols
- RedLINK 2.0
- Power sources
- Battery
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Honeywell Home
C7089R1013 Wireless Outdoor Sensor
Model C7089R1013 SKU 365486
Battery-powered outdoor temperature and humidity sensor for compatible RedLINK systems.
- Communication protocols
- RedLINK
- Mounting
- Outdoor bracket
- Power sources
- Battery
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Honeywell Home
REM5000R1001 Portable Comfort Control
Model REM5000R1001 SKU 365485
Portable remote control for compatible RedLINK thermostats and equipment interfaces.
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Honeywell Home
THM6000R7001 RedLINK Internet Gateway
Model THM6000R7001 SKU 365490
Ethernet-connected gateway for remote access to compatible RedLINK thermostat systems.
- Supply voltage
- Adapter input: 100–240 Vac, 50/60 Hz; Adapter output: 4.80–5.20 Vdc; maximum 1000 mA
- Communication protocols
- RedLINK to thermostat system; Ethernet to router
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