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Posted by on November 26, 2006, 1:07 pm
On 25 Nov 2006 17:02:59 -0800, badaczewski@gmail.com wrote:
>Before I removed the old thermostat I wrote down and identified what
>each wire letter and function based on a wiring diagram of my
>thermostat (1F58-910) found here,
>http://customer.honeywell.com/NR/rdonlyres/5E44C66F-DC38-4334-B256-C691C2EC1669/581/706627.pdf.
>
>After taking notes on the thermostat wiring I matched the function of
>each wire to the proper terminal of the new thermostat. Since both
>thermostats were manufactured by White-Rodgers many of the terminal
>letters matched up for the most part.
>
>If something didn't match I called White Rodgers, which is where I was
>told to connect the W wire (aka - 1st stage heat) to the B terminal
>(aka c/o valve heat). I was then told to connect the E wire (aka -
>emergency heat) to the W/E terminal (aka Emergency Mode 1st Stage). And
>then finally I was told to jumper the W/E and W2 terminals. My W2 wire
>(aka Aux. Heat) is plugged into the W2 terminal (aka - 2nd Stage Heat).
something dont make sense here, and that is connecting W to the B
terminal for a Trane heat pump condenser. The tranes i know energize
cooling on the O terminal. With no 24 v to the O terminal, the HP is
in heat mode.
>
>The problem is that after the heat pump cuts off I "believe" that the
>fan and the emergency heat remain on. I assume this cause I can here
>the house fan/blower still going and the temp will continue to rise as
>much as 10 degrees. I can also confirm that when the thermostat reaches
>target temp the heatpump stops humming and the fan of the heat pump
>stops moving. Hence, the heatpump turns off when target temp is
>reached.
>
>I used the thermostat all summer and the air-conditioning worked fine I
>also can turn the fan on and off fine when not in heat mode.
>
>Jake wrote:
>> > His problem is that its a heat pump and he shouldnt be messing with
>> > that many wires. Most homeowners cant figure out more than about 4
>> > wires. Especially when different manufactures use different terminal
>> > designations for the same terminal. X, C, B and a host of others are
>> > all the same terminal. He will understand though after he lets the
>> > smoke out.
>> > Bubba
>>
>> OK Bubba... now you've got me puzzled. I know one of our older
>> buildings... 1987 I think... has a Trane very similar to this. Two stage
>> electric backup pack.
>>
>> Aren't W2 and E two different things in that scenario... and doesn't
>> this unit (like a lot of them) call for the fan when backup is active?
>>
>> We had a Carrier Commercial stat do this same exact thing on a unit...
>> the contractor screwed with it forever and then one afternoon I got my
>> meter out and started diagnosing things.
>>
>> First thing wrong was that the Day of Week was programmed wrong... thus
>> the setpoints would run the program incorrectly. Next was that the stat
>> called for fan all the time for some reason I can't remember now...
>> except that it had to do with 2nd stage heat vs. E. As I remember,
>> removing a jumper took care of it.
>>
>> Jake
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