Gas and Oil Home Heating Furnaces - Replacing thermostats
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smiley32597
11-14-02, 12:11 PM
I'm replacing a mercury-type thermostat with a digital. The mercury-type is a White-RodgersLR27935 and the Digital is a ritetemp8085. The problem I'm having is the existing wiring isn't labeled, and some of the markings between the thermostats are different. The system I'm installing uses 6 wires:
White-Rodgers therm - Yellow wire = Y
Green wire = G
Red wire = R
White wire = W2
Blue wire = X1
Orange wire = O
ritetemp therm - Yellow wire= Y
Green wire = G
Red wire = RC (or RH, I have it connected to RC)
White wire = W
Orange wire = O
Blue wire = ???
The AC works fine, but I get no heat. I've hooked up the Blue wire to the B terminal.... nothing..... I've hooked the jumper for the RC and RH....... nothing.... with and without the blue wire. What am I doing wrong?? Thanks in advance.
White-Rodgers therm - Yellow wire = Y
Green wire = G
Red wire = R
White wire = W2
Blue wire = X1
Orange wire = O
ritetemp therm - Yellow wire= Y
Green wire = G
Red wire = RC (or RH, I have it connected to RC)
White wire = W
Orange wire = O
Blue wire = ???
The AC works fine, but I get no heat. I've hooked up the Blue wire to the B terminal.... nothing..... I've hooked the jumper for the RC and RH....... nothing.... with and without the blue wire. What am I doing wrong?? Thanks in advance.
the_tow_guy
11-14-02, 05:43 PM
Check the instruction sheet that came with the new one to see if there is a tech support number. I recently did this op for my Mom and had a similar problem. Gave them the brand names and wiring config and they steered me right through. Depends on the brand as to how good the tech support will be. I don't recall her brand, but they even had a web site with installation help.
GregH
11-17-02, 07:55 AM
smiley32597:
You don't say what type of system you have.
I believe White Rogers used X1 terminal as an emergency heat indicator on heat pump systems.
Something doesn't look quite right with your terminal ID. W2 normally indicates second stage heat and you don't show a W1 which would be 1st stage heat.
You may not have the correct thermostat for your application.
Furnace and stat documentation should clear this up.
If your system uses one transformer for heat and a/c then you would jumper Rc and Rh.
You don't say what type of system you have.
I believe White Rogers used X1 terminal as an emergency heat indicator on heat pump systems.
Something doesn't look quite right with your terminal ID. W2 normally indicates second stage heat and you don't show a W1 which would be 1st stage heat.
You may not have the correct thermostat for your application.
Furnace and stat documentation should clear this up.
If your system uses one transformer for heat and a/c then you would jumper Rc and Rh.
hvac4u
11-17-02, 10:54 AM
w1 would actually be Y, which would energize the o/d unit, with either B or O as the reversing valve depending on make. W2 would be aux heat. do you have any lights on the tstat? they may need common, unless X1 is, but do not think so, as gregH said, X1 is usually emergency heat.
GregH
11-17-02, 02:49 PM
hvac4u:
Thanks for the correction. :o
There are literaly no air to air heat pumps around here. It's too cold most of the time.
Thanks for the correction. :o
There are literaly no air to air heat pumps around here. It's too cold most of the time.