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Posted by Zyp on May 13, 2008, 10:54 am
Bob Simon wrote:
>
>> Bob Simon wrote:
>>> I'm looking at programmable thermostats for my heat pump -- Goodman
>>> GSH14030 compressor and ARUF3030 air handler with a 10kW heat kit.
>>> I want to determine how many stages of heating and cooling I have
>>> so I went to the Goodman web site and searched the spec sheets for
>>> the word "stage" but it was not listed this way.
>>>
>>> Can someone please tell me if this is a single stage system or
>>> multi-stage? For two stage systems do both the compressor and air
>>> handler need to be two stage or is this determined by only one of
>>> these components?
>>
>> Bob;
>>
>> Your system is a 14 SEER 2.5 Ton Heat Pump. You will need a single
>> stage cool, 2 stage heating thermostat. The second stage for heat
>> is the strip heaters. Look in the instructions that came with the
>> indoor unit. It will show you how to connect your new thermostat to
>> your system. Good luck.
>>
>> And if you find a problem call your local HVAC repair people.
>> They'll help you, but there will be a fee tied to the help. We have
>> bills to pay too.
>
> Thank you. Is the reason you know that the compressor is a single
> stage because it only has one BTU rating?
>
> The old thermostat has a single O/B contact whereas the one I'm
> considering buying (White Rogers 1F95-1277) has both an O and a B.
> Currently the orange wire goes to O/B - the changeover relay. If I
> purchase the 1F95-1277, how should I wire O and B?
Geez;
One question at a time. - I know is single stage because it is. A 16 SEER
Goodman is 2 stage, the 14 SEER model is single. The O/B terminal for the
reversing valve on the thermostat you have can be / is programmed through a
menu. The 'cheaper' white rogers thermostat, is not. It is likely your
Goodman is default to Heat, so the reversing valve is active during the call
for cooling, hence 'O' terminal use.
Why don't you just hire a trained professional? If your not sure, it would
be better to hire one now, instead of having them repair failed controls
later.
--
Zyp
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