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Environmental & Combustion Controls
YTH9421C1002
Automatic or Manual changeover and up to 4 heat/2 cool stages for heating and cooling systems
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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Product Prices
Product No Product Base Price($) Order Quantity
yth9421c1002/U
1 + $516.58

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 Total Home Comfort System with Temperature, Humidification, Dehumidification and Ventilation Control
Application Heat/Cool or Heat Pump with Auxiliary Heat
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, 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.) 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 99 F
Setting Temperature Range (C) Heat: 4.5 C to 32 C; Cool: 15 C to 37 C
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
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
Includes TH9421C1004 Thermostat and THM5421C1008 Equipment Interface Module
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.
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 - (TH9421C VisionPRO IAQ Total Home Comfort System)
Product Data - (TH9421C Systeme de regulation d'ambiance pour toute la maison)
Product Data - (TH9421C Sistema VisionPRO® de confort total del hogar, para una mejor calidad del aire interior)
Operating Manual - (TH9421 VisionPRO IAQ Total Home Comfort System (English, French, Spanish))
Installation Guide - (TH9421 VisionPRO IAQ Touch-screen Programmable Thermostat, English, French, Spanish)
Installation Guide - (TH9421 VisionPRO IAQ Equipment Interface Module (English, French, Spanish))
Error Codes - (TH9421C EnviraCOM Error Codes - English, French, Spanish)
Operating Manual - (TH9421C Total Home Control System)
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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