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Old 03-14-2011, 10:34 PM   #16
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Heat Pump Thermostat wiring


RED - Rc JUMPERED TO R
ORANGE - O/B
YELLOW - Y
GREEN - G
WHITE - Aux
BROWN - E
NOT USED - L
BLUE - C

I don't like this setup because you don't get full tempering during defrost cycle and Never get full heat during call for aux heating. You can jumper AUX to E to get full heat, however, then your always using more energy when aux heat is called for. A better stat to allow the system to function with full potential would be the honeywell IAQ. Also, one note is that I don't recommend setback temps on a heat pump system because it will cause the electric heat strips to come on and offset any savings you might have seen from using setback temps. HP systems are set and forget it.

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Old 03-14-2011, 10:36 PM   #17
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Heat Pump Thermostat wiring


AUX and E are the same terminal

Last edited by SHBicycle; 03-14-2011 at 10:41 PM.
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Old 03-14-2011, 10:42 PM   #18
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Please don't shoot yourself, I just found that comment funny.
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Old 03-14-2011, 10:53 PM   #19
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Heat Pump Thermostat wiring


Both white and brown would go to this terminal. Again this is not providing you full potential and comfort your system can offer. Connecting it this way will work to get you going though. The other thing you could do is WHITE to AUX/E and BROWN to L. This thermostat has full output on L when put in emergency heat.
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Old 03-14-2011, 11:08 PM   #20
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Heat Pump Thermostat wiring


what would be a good thermostat for this heat pump?
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Old 03-14-2011, 11:09 PM   #21
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Heat Pump Thermostat wiring


Honeywell IAQ
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Old 03-15-2011, 05:07 AM   #22
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Heat Pump Thermostat wiring


The TH6320 is a 3 stage heat pump thermostat. However, it is designed to control 2 stages of heat pump and 1 stage of aux heat. The YTH9421 is a much better thermostat, and will stage in both the compressor and aux heat. As its a 4 stage thermostat.
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Old 03-15-2011, 06:19 AM   #23
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Heat Pump Thermostat wiring


I like aprilaire 8466
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Old 03-15-2011, 03:28 PM   #24
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Heat Pump Thermostat wiring


Quote:
Originally Posted by heatycooly View Post
I like aprilaire 8466
Seen a few, but never really used them myself. I've heard good things about them though. I think Honeywell even copied a feature or 2 from Aprilaire on some of their thermostats.

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