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Old 02-27-2012, 08:43 AM  
crabman531
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Default Installing digital thermostat

I'm trying to install a TempRite digital thermostat, replacing a 20-some-year-old mercury one. The house runs on a heat pump in the attic, with an A/C unit outside.
Attached is a picture of the old themostat...my problem is, from this picture I'm not sure which wires are supposed to go where on the new stat. I've also attached a page in the new stat's manual which assigns labels to the functions of the old stat's wires (these labels I tag on the wires with stickers).
Based on both pictures, can anyone please take a stab at what labels I might attach to the old stat's wires? Thanks in advance.



manual.jpg   stat.jpg  
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Old 02-27-2012, 08:44 AM  
crabman531
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Default -

(Would delete this second post if able, accidentally posted picture twice)



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Last edited by crabman531; 02-27-2012 at 08:52 AM. Reason: Accidentally made a second post
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Old 02-27-2012, 01:52 PM  
kok328
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what is the make of the heat pump and can you remove the base plate for the old stat and post a pic of the remaining wires coming out of the wall?

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Old 02-28-2012, 11:27 PM  
crabman531
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Thanks for responding. Heat pump is Lennox GS18Q3-75-8. Photo attached.

thermo-wires.jpg  
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Old 02-29-2012, 03:25 PM  
kok328
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Connect the wires coming out of the wall to the terminals on the new stat.
Wire Terminal
Red RH
Green G
Yellow Y
White W

However, this wires coming out of the wall do not appear to be typical combination of heat pump wires.

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Old 03-03-2012, 07:00 PM  
crabman531
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Worked well after moving around a couple jumpers on thermostat (not shown)... thank you!



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