Original message
| sweetdealinc
 |  "Wiring Programmable Thermostat"
, posted Wed 4 Apr 15:07  
Want to replace Am Standard ASYSTAT652 with programmable Honeywell TH6620D for 2 stage heat pump one stage cooling system. Need help with wiring. Am Standard: R (24 V hot) Y (Compressor) O (Reversing Valve) G (Fan) T (thermistor) W (heat/auxillary heat on heat pump) jumped with X2 (auxiliary heat during defrost/heat pump) B (Common) and F (Light). The Honeywell is Rc jumped with R (24 V hot) Y (Compressor Contact) O/B (change over valve) G (fan relay) E (emergency heat relay) Aux (auxiliary heat relay) C (Common) L (sends output to EM heat). I think I am clear about this: R goes to Rc/R, Y goes to Y, O goes to O/B, G goes to G, and B goes to C. However there are three wires left on the Am Standard (T, W and X2, F) and three terminals on Honeywell (E, Aux. amd L). Anyone know how to wire the remaining three wires? Thank you.
Mike
|
|
Replies:
|
| Houston204
| "Re(1):Wiring Programmable Thermostat" , posted Mon 9 Apr 00:06:
old = new
F = L
W = Aux jumped to E
T = taped off
Don't see this stat on honeywell's website. There is usually configuration that must also be done.
Usually option 170 = 7 (multistage heatpump)
and in your case option 190 = 0 (O/B = O)
[this message was edited by Houston204 on Sun 3 Jun 14:58] |
| | sweetdealinc
| "Re(2):Wiring Programmable Thermostat" , posted Mon 9 Apr 08:01
Thanks. I'll give it a try.
Mike
|
|
|
