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HVAC Discussions - Heating, ventilation and air conditioning.
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Posted by on July 29, 2006, 11:47 pm
My friend has a Coleman heat pump model 3736-811 with a gas furnace. He
bought a
Honeywell RTH 7500 thermostat to replace the old one.
The wires on the old thermostat are: W2-grey, G-green, R-red, L-white,
X-black, O-orange,
Y-yellow, and B-blue.
The problem is, the instructions say, if the L terminal is used the C
wire must be connected.
But, there is no C wire. I would appreciate any help.
Lobo
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Posted by Bob Pietrangelo on July 29, 2006, 11:54 pm
Honeywell has technical support. Their number is on the back of the
instructions
--
Bob Pietrangelo
bobp3@comcast.net
bob@comfort-solution.biz
www.comfort-solution.biz
On Time or Your Service Call is FREE
Preventive Maintenance Specialist
> My friend has a Coleman heat pump model 3736-811 with a gas furnace. He
> bought a
> Honeywell RTH 7500 thermostat to replace the old one.
> The wires on the old thermostat are: W2-grey, G-green, R-red, L-white,
> X-black, O-orange,
> Y-yellow, and B-blue.
> The problem is, the instructions say, if the L terminal is used the C
> wire must be connected.
> But, there is no C wire. I would appreciate any help.
> Lobo
>
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Posted by oløenneker on July 30, 2006, 4:25 am
alOBO1@msn.com wrote:
> My friend has a Coleman heat pump model 3736-811 with a gas furnace. He
> bought a
> Honeywell RTH 7500 thermostat to replace the old one.
>
> The wires on the old thermostat are: W2-grey, G-green, R-red, L-white,
> X-black, O-orange,
> Y-yellow, and B-blue.
>
> The problem is, the instructions say, if the L terminal is used the C
> wire must be connected.
> But, there is no C wire. I would appreciate any help.
>
> Lobo
Is the system working? If so, leave it alone.
If not, call the installing company to fix it...
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> bought a
> Honeywell RTH 7500 thermostat to replace the old one.
> The wires on the old thermostat are: W2-grey, G-green, R-red, L-white,
> X-black, O-orange,
> Y-yellow, and B-blue.
> The problem is, the instructions say, if the L terminal is used the C
> wire must be connected.
> But, there is no C wire. I would appreciate any help.
> Lobo
>