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Installing 5-2 progrmmable Honeywell thermostat

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Installing 5-2 progrmmable Honeywell thermostat kumarp5 04-01-2007
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Posted by kumarp5 on April 1, 2007, 2:29 pm


My HVAC system has a C wire and so does my old Honeywell non
programmable digitial thermostat. In order to save some money I bought
a Programmable 5-2 day programmable thermostat (Honeywell). This
thermostat does not have a position for the C wire
(The other positions are Rh, Rc(connected by jumper to Rh), W, Y, G
and it matches with the new one)

The question is - can I leave the C wire unconnected?

If yes, what are the pitfalls of doing so

Thanks


Posted by RBM on April 1, 2007, 3:29 pm


The thermostat doesn't use a common. No pitfalls



> My HVAC system has a C wire and so does my old Honeywell non
> programmable digitial thermostat. In order to save some money I bought
> a Programmable 5-2 day programmable thermostat (Honeywell). This
> thermostat does not have a position for the C wire
> (The other positions are Rh, Rc(connected by jumper to Rh), W, Y, G
> and it matches with the new one)
>
> The question is - can I leave the C wire unconnected?
>
> If yes, what are the pitfalls of doing so
>
> Thanks
>



Posted by mm on April 1, 2007, 4:06 pm


On Sun, 1 Apr 2007 15:29:05 -0400, "RBM" <rbm2(remove
this)@optonline.net> wrote:

>The thermostat doesn't use a common. No pitfalls

I learned that if you don't connect the C wire, it will detonate,
usually in 10 hours.

I learned this watching "24".
>
>
>> My HVAC system has a C wire and so does my old Honeywell non
>> programmable digitial thermostat. In order to save some money I bought
>> a Programmable 5-2 day programmable thermostat (Honeywell). This
>> thermostat does not have a position for the C wire
>> (The other positions are Rh, Rc(connected by jumper to Rh), W, Y, G
>> and it matches with the new one)
>>
>> The question is - can I leave the C wire unconnected?
>>
>> If yes, what are the pitfalls of doing so
>>
>> Thanks
>>
>


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