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Environmental & Combustion Controls
THM5421C1008
Premier White VisionPRO IAQ Total Home Comfort Solution Equipment Interface Module with up to 4 Heat/2 Cool stages and 1, 2, 3, C, R, Rc, Rh, R, W1-O/B, W2-Aux, W3-Aux2, Y, Y2, G, L, Out1, Out2, In1, In2, Dats1, Dats2, Hum1, Hum2, Dhm1, Dhm2, Vnt1, Vnt2

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Overview
The VisionPRO IAQ touchscreen universal programmable thermostat provides electronic control of 24 Vac heating and cooling systems in addition to humidification, dehumidification and ventilation all with just 3 wires to the thermostat.

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Features

• Advanced dual-fuel control.
• Three wires to the living space allows for easy equipment upgrade without having to run additional thermostat wire.
• Thermostat connects with Equipment Interface Module or EnviraZONE panel to control temperature, humidification, dehumidification and ventilation from a single point in the home.
• Automatically raises humidity levels throughout all rooms in the home, moisturizing air to prevent symptoms of dryness and to protect hardwood flooring and woodwork.
• Removes air pollutants by exchanging the stale air in a house with fresh, filtered air better than having an open window.
Product Specifications  Back To Top
Description VisionPRO® IAQ Equipment Interface Module. Total Home Comfort System with Temperature, Humidification, Dehumidification and Ventilation Control
Application Heat/Cool or Heat Pump with Auxiliary Heat
Color Premier White®
Power Method Hardwired
Terminal Designations 1, 2, 3, C, R, Rc, Rh, R, W1-O/B, W2-Aux, W3-Aux2, Y, Y2, G, L, Out1, Out2, In1, In2, Dats1, Dats2, Hum1, Hum2, Dhm1, Dhm2, Vnt1, Vnt2
Dimensions (in.) 7 1/4 in. high x 4 1/2 in wide x 1 3/8 in deep
Dimensions (mm) 185 mm high x 116 mm wide x 34 mm deep
Mounting Vertical
Electrical Ratings THM5421 is rated 20 to 30 Vac
Frequency 50 Hz
Frequency 60 Hz
Stages Up to 4 Heat/2 Cool Heat Pump
Stages Up to 3 Heat/2 Cool Conventional
Outdoor Sensor Yes, optional
Discharge Sensor Yes, optional
Remote Sensor Yes, optional
Heat Current 1.0 A running
Cool Current 1.0 A running
Fan Current 0.6A running
Operating Humidity Range (% RH) 5 to 90% RH, non-condensing
Comments Includes Humidification Control with or without Frost Protection, Dehumidification using Whole House Dehumidifier or Air Conditioning with High or Low speed fan, Advanced Patented Ventilation Control and Advanced Dual Fuel Heat Pump Control.
Used With TH9421 VisionPRO IAQ Thermostat
Voltage 20 to 30 Vac

Literature and other Resources Download Back To Top
Entering the Installer setup LCD(LineArt)
Entering the Installer setup LCD(LineArt - Web Quality Image)
VisionPro® IAQ Total Home Comfort System, installing Equipment Interface Module Wiring(LineArt)
VisionPro® IAQ Total Home Comfort System, installing Equipment Interface Module Wiring(LineArt - Web Quality Image)
VisionPro® IAQ, typical 1H/1C conventional hookup with single transformer Wiring(LineArt)
VisionPro® IAQ, typical 1H/1C conventional hookup with single transformer Wiring(LineArt - Web Quality Image)
VisionPro® IAQ, typical 1H/1C conventional hookup with oil primary Wiring(LineArt)
VisionPro® IAQ, typical 1H/1C conventional hookup with oil primary Wiring(LineArt - Web Quality Image)
3H/2C, 2H/2C, 2H/1C, 1H/2C, 1H/1C conventional hookup with one transformer Wiring(LineArt)
3H/2C, 2H/2C, 2H/1C, 1H/2C, 1H/1C conventional hookup with one transformer Wiring(LineArt - Web Quality Image)
Typical hookup of heat pump system (up to 4H/2C heat pump) Wiring(LineArt)
Typical hookup of heat pump system (up to 4H/2C heat pump) Wiring(LineArt - Web Quality Image)
Typical hookup of non-powered humidifier Wiring(LineArt)
Typical hookup of non-powered humidifier Wiring(LineArt - Web Quality Image)
Typical hookup of powered humidifier Wiring(LineArt)
Typical hookup of powered humidifier Wiring(LineArt - Web Quality Image)
Typical hookup of variable speed blower for dehumidification in low speed Wiring(LineArt)
Typical hookup of variable speed blower for dehumidification in low speed Wiring(LineArt - Web Quality Image)
Typical hookup of powered whole house dehumidifier (contacts normally open) Wiring(LineArt)
Typical hookup of powered whole house dehumidifier (contacts normally open) Wiring(LineArt - Web Quality Image)
Typical hookup of fresh air damper Wiring(LineArt)
Typical hookup of fresh air damper Wiring(LineArt - Web Quality Image)
Typical hookup of powered ventilation Wiring(LineArt)
Typical hookup of powered ventilation Wiring(LineArt - Web Quality Image)
Hookup of Honeywell DH90 with fresh air intake for ventilation Wiring(LineArt)
Hookup of Honeywell DH90 with fresh air intake for ventilation Wiring(LineArt - Web Quality Image)
Setting dehumidification level Callouts(LineArt)
Setting dehumidification level Callouts(LineArt - Web Quality Image)
Balance point with auxiliary lockout temperature Graph(LineArt)
Balance point with auxiliary lockout temperature Graph(LineArt - Web Quality Image)
Entering the Installer setup LCD(LineArt)
Entering the Installer setup LCD(LineArt - Web Quality Image)
Entering the Installer setup LCD(LineArt)
Entering the Installer setup LCD(LineArt - Web Quality Image)
Thermostat keys Callouts(LineArt)
Thermostat keys Callouts(LineArt - Web Quality Image)
Thernostat display Callouts(LineArt)
Thernostat display Callouts(LineArt - Web Quality Image)
User setup, press and release the system key LCD(LineArt)
User setup, press and release the system key LCD(LineArt - Web Quality Image)
User setup, press and hold the center blank key LCD(LineArt)
User setup, press and hold the center blank key LCD(LineArt - Web Quality Image)
Edit schedule, press Sched key LCD(LineArt)
Edit schedule, press Sched key LCD(LineArt - Web Quality Image)
Fan control, programmed fan display LCD(LineArt)
Fan control, programmed fan display LCD(LineArt - Web Quality Image)
Setting temperature overrides, temporary temperature hold LCD(LineArt)
Setting temperature overrides, temporary temperature hold LCD(LineArt - Web Quality Image)
Setting temperature overrides, permanent hold LCD(LineArt)
Setting temperature overrides, permanent hold LCD(LineArt - Web Quality Image)
Setting temperature overrides, vacation hold LCD(LineArt)
Setting temperature overrides, vacation hold LCD(LineArt - Web Quality Image)
Locked screen LCD(LineArt)
Locked screen LCD(LineArt - Web Quality Image)
Filter change reminder LCD(LineArt)
Filter change reminder LCD(LineArt - Web Quality Image)
Adaptative Intelligent (temperature) Recovery LCD(LineArt)
Adaptative Intelligent (temperature) Recovery LCD(LineArt - Web Quality Image)
Minimum Off-timer LCD(LineArt)
Minimum Off-timer LCD(LineArt - Web Quality Image)
Setting dehumidification level with air conditioner Front(LineArt)
Setting dehumidification level with air conditioner Front(LineArt - Web Quality Image)
Display when controlling a whole-house dehumidifier Front(LineArt)
Display when controlling a whole-house dehumidifier Front(LineArt - Web Quality Image)
Humidifier Pad change reminder LCD(LineArt)
Humidifier Pad change reminder LCD(LineArt - Web Quality Image)
UV Lamp change reminder LCD(LineArt)
UV Lamp change reminder LCD(LineArt - Web Quality Image)
Setting humidification level with frost protection Front(LineArt)
Setting humidification level with frost protection Front(LineArt - Web Quality Image)
Ventilation control options Front(LineArt)
Ventilation control options Front(LineArt - Web Quality Image)
Ventilation control setup Front(LineArt)
Ventilation control setup Front(LineArt - Web Quality Image)
Setting temperature overrides, Southern Dehumidification Away Setting LCD(LineArt)
Setting temperature overrides, Southern Dehumidification Away Setting LCD(LineArt - Web Quality Image)
Wiring a single C7189U1005 Indoor Sensor Wiring(LineArt)
Wiring a single C7189U1005 Indoor Sensor Wiring(LineArt - Web Quality Image)
Wiring multiple C7189U1005 Sensors Wiring(LineArt)
Wiring multiple C7189U1005 Sensors Wiring(LineArt - Web Quality Image)
Wiring C7089U1006 Outdoor Sensor to the Equipment Interface Module Wiring(LineArt)
Wiring C7089U1006 Outdoor Sensor to the Equipment Interface Module Wiring(LineArt - Web Quality Image)
VisionPRO® IAQ Comfort System, dimensions Dimension(LineArt)
VisionPRO® IAQ Comfort System, dimensions Dimension(LineArt - Web Quality Image)
VisionPro® IAQ Total Home Comfort System, inserting wires in terminal block Installation(LineArt)
VisionPro® IAQ Total Home Comfort System, inserting wires in terminal block Installation(LineArt - Web Quality Image)
Mounting thermostat to wallplate Installation(LineArt)
Mounting thermostat to wallplate Installation(LineArt - Web Quality Image)
VisionPro® IAQ Total Home Comfort System, mounting the wallplate Installation(LineArt)
VisionPro® IAQ Total Home Comfort System, mounting the wallplate Installation(LineArt - Web Quality Image)
THM5421C1008 Equipment Interface Module, dimensions Dimension(LineArt)
THM5421C1008 Equipment Interface Module, dimensions Dimension(LineArt - Web Quality Image)
Humidity settings menu LCD(LineArt)
Humidity settings menu LCD(LineArt - Web Quality Image)
Humidity level display LCD(LineArt)
Humidity level display LCD(LineArt - Web Quality Image)
Wiring key Wiring(LineArt)
Wiring key Wiring(LineArt - Web Quality Image)
Equipment Module Pack - 3 inch Front(Photo_BW - Web Quality Image)
Equipment Module Pack - 3 inch Front(Photo_BW - Print Quality Image)
Equipment Module Pack - 6 inch Front(Photo_BW - Web Quality Image)
Equipment Module Pack - 6 inch Front(Photo_BW - Print Quality Image)
Equipment Module Pack - 6 inch Main(Photo_BW - Web Quality Image)
Equipment Module Pack - 6 inch Main(Photo_BW - Print Quality Image)
Equipment MOdule Pack - 3 inch Front(Photo_Color - Web Quality Image)
Equipment MOdule Pack - 3 inch Front(Photo_Color - Print Quality Image)
Equipment Module Pack - 6 inch Front(Photo_Color - Web Quality Image)
Equipment Module Pack - 6 inch Front(Photo_Color - Print Quality Image)
Equipment Module Pack - 3 inch Main(Photo_Color - Web Quality Image)
Equipment Module Pack - 3 inch Main(Photo_Color - Print Quality Image)
Equipment Module Pack - 6 inch Main(Photo_Color - Web Quality Image)
Equipment Module Pack - 6 inch Main(Photo_Color - Print Quality Image)
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