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Environmental & Combustion Controls
TH9421C1004
VisionPRO® IAQ Total Home Comfort System with Temperature, Humidification, Dehumidification and Ventilation Control
Hazmat# UN3091 Lithium metal batteries packed in/with equipment

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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 Touchscreen 7-Day Programmable Thermostat. Total Home Comfort System with Temperature, Humidification, Dehumidification and Ventilation Control
Application Conventional and Heat Pump systems
Programmability 7 Day Multiple Day Programming or Non-Programmable
Changeover Auto/Manual Selectable
Color Premier White®
Switch Positions (System) HEAT-OFF-COOL-AUTO-EM.HEAT
Switch Positions (Fan) AUTO-ON-CIRC
Power Method Communicating
Terminal Designations 1, 2, 3
Dimensions (in.) 4 9/16 in. high x 6 in. wide x 1 1/4 in. deep
Dimensions (mm) 116 mm high x 152 mm wide x 32 mm deep
Mounting Horizontal
Electrical Ratings THM5421 is rated 20 to 30 Vac
Setting Temperature Range (F) Heat: 40 F to 90 F; Cool 60 F to 99F
Setting Temperature Range (C) Heat: 4.5 C to 32 C; Cool: 15 C to 37C
Differential Temperature (F) ± 1 F
Differential Temperature (C) ±0.5 C
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
Sensor Element Thermistor
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 THM5421C1008 Equipment Interface Module
Display Size 10 sq. in.
Humidification Setting Range 10 to 60% RH.
Dehumidification Setting Range 40 to 80% RH.
Voltage 20 to 30 Vac

Literature and other Resources Download Back To Top
Product Data - (TH9421 VisionPRO IAQ Total Home Comfort System)
Product Data - (TH9421 Systeme de regulation d'ambiance pour toute la maison - French)
Installation Guide - (TH9421 VisionPRO IAQ Touch-screen Programmable Thermostat, English, French, Spanish)
Product Data - (TH9421C de confort total del hogar, para una mejor calidad del aire interior - Spanish)
Installation Guide - (TH9421 VisionPRO IAQ Equipment Interface Module - English, French, Spanish)
Operating Manual - (TH9421 Total Home Comfort System - English, French, Spanish)
Error Codes - (TH9421C EnviraCOM Error Codes - English, French, Spanish)
Installation Instructions - (TH9421 Range Stop Instructions - English, Spanish)
VisionPRO 9000 - 3 inch Main(Photo_BW - Web Quality Image)
VisionPRO 9000 - 3 inch Main(Photo_BW - Print Quality Image)
VisionPRO 9000 - 6 inch Main(Photo_BW - Web Quality Image)
VisionPRO 9000 - 6 inch Main(Photo_BW - Print Quality Image)
VisionPRO 9000 - 3 inch Main(Photo_Color - Web Quality Image)
VisionPRO 9000 - 3 inch Main(Photo_Color - Print Quality Image)
VisionPRO 9000 - 6 inch Main(Photo_Color - Web Quality Image)
VisionPRO 9000 - 6 inch Main(Photo_Color - Print Quality Image)
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