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Installing a programmable thermostat for baseboard heaters

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Installing a programmable thermostat for baseboard heaters Doc 10-10-2007
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Posted by Doc on October 10, 2007, 1:42 am
X-No-Archive: Yes
I've replaced the line-voltage thermostat with a new programmable one
(Honeywell LineVolt Pro 8000). During installation, I discovered that
I did not have enough wires coming from the wall to match the four
wires coming from the thermostat (L1, L2, and two Load wires). I
therefore did not connect one of the Load wires. (See diagram at
http://snice.net/ThermostatWiring.jpg).

Is it okay that I did not connect one of these wires? If it's not
okay, I'd appreciate some guidance on what to do given the wires that
I have available.

Thanks,

Doc


Posted by Tony Hwang on October 10, 2007, 2:11 am
Doc wrote:
> X-No-Archive: Yes
> I've replaced the line-voltage thermostat with a new programmable one
> (Honeywell LineVolt Pro 8000). During installation, I discovered that
> I did not have enough wires coming from the wall to match the four
> wires coming from the thermostat (L1, L2, and two Load wires). I
> therefore did not connect one of the Load wires. (See diagram at
> http://snice.net/ThermostatWiring.jpg).
>
> Is it okay that I did not connect one of these wires? If it's not
> okay, I'd appreciate some guidance on what to do given the wires that
> I have available.
>
> Thanks,
>
> Doc
>
Hi,
You have connect all 4 wires. Slice the one you left out and connect it
to new 'stat.
Turn off power to the heater when working on it.

Posted by RBM on October 10, 2007, 7:25 am
Looks like the thermostat you're replacing was single pole. It had one line
wire spliced to one load wire. You need to separate those and connect them
to the thermostat


> X-No-Archive: Yes
> I've replaced the line-voltage thermostat with a new programmable one
> (Honeywell LineVolt Pro 8000). During installation, I discovered that
> I did not have enough wires coming from the wall to match the four
> wires coming from the thermostat (L1, L2, and two Load wires). I
> therefore did not connect one of the Load wires. (See diagram at
> http://snice.net/ThermostatWiring.jpg).
>
> Is it okay that I did not connect one of these wires? If it's not
> okay, I'd appreciate some guidance on what to do given the wires that
> I have available.
>
> Thanks,
>
> Doc
>



Posted by Doc on October 10, 2007, 10:14 am
Yes, you're right about my previous thermostat being single pole.

Regarding the splicing: There are two white wires spliced together and
both have black electrical tape on the ends. I understand that this is
an indication that they're recoded. Does that modify your advice at
all?

If not, and I have to unsplice as you recommend, how do I know which
one is Line and which is Load?

Thank you.


> Looks like the thermostat you're replacing was single pole. It had one line
> wire spliced to one load wire. You need to separate those and connect them
> to the thermostat
>


Posted by RBM on October 10, 2007, 11:13 am
Once you separate the four wires, you will notice there are two separate
cables. Turn the breaker back on, and with a tester, see which cable gives
you 240 volts across it's two wires. Once determined, kill the power and
attach those two to the "line" and the other two to the "load"



> Yes, you're right about my previous thermostat being single pole.
>
> Regarding the splicing: There are two white wires spliced together and
> both have black electrical tape on the ends. I understand that this is
> an indication that they're recoded. Does that modify your advice at
> all?
>
> If not, and I have to unsplice as you recommend, how do I know which
> one is Line and which is Load?
>
> Thank you.
>
>
>> Looks like the thermostat you're replacing was single pole. It had one
>> line
>> wire spliced to one load wire. You need to separate those and connect
>> them
>> to the thermostat
>>
>



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