Honeywell Visionpro Iaq
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 Honeywell VisionPRO IAQ YTH9421C1010 Thermostat Version 3  US $219.95
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 Honeywell YTH9421C1002 VisionPRO IAQ System US $212.69
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 Honeywell VisionPro IAQ Thermostat TH9421C1004 US $207.88
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 Honeywell TH9421C1004 VisionPRO IAQ Thermostat 4H 2C US $175.17
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 HONEYWELL VISIONPro IAQ TH9421C1004 THERMOSTAT VERSION 3 US $169.95
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 HONEYWELL Thermostat VisionPRO IAQ TH9421C1004 US $160.85
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 Honeywell VisionPRO IAQ Total Home Comfort Thermostat US $139.99
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 YTH9421C1010 Honeywell Visionpro IAQ Thermostat US $123.00
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How to wire honeywell visionpro IAQ?
The t-stat comes with EIT module. that wires to the t-stat and the furnace. I'm having trouble with the module to furnace wiring.
from the thermostat you match 1,2,3 wires to the module, from the module to the furnace. -
R to R (this is your 24V hot)
W to W (furnace 24V input
G to G (fan for cooling 24V input)
Y to Y (cooling 24V input), there should also be another wire that connects with this that goes to the condensing unit
C to C ( Common - must have this connected for IAQ to work) as with the Y, there should be another wire to connect to this that goes to the condensing unit.
- maybe W2 to W2 if you have a 2 stage furnace, you'll know if you have a 2 stage furnace because the W2 connection on the furnace will be present.
- maybe Y2, if you have 2-stage cooling.
if you have a humidifier connect both wires from the humidifier selinoid valve to each of the HUM terminals.
Horizon Services, Inc - How To Use Your Honeywell VisionPRO IAQ Thermostat - Part 2
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