We got a new thermostat to replace the old mercury bulb (or whatever's
in there) type. The person who set it up doesn't know if it's right.
The thermostat is a FocusPRO TH5220D.
The outside unit:
TRANE BTB718A 100A1
Compr. Mot. 10.2 44 LRA
O.D. Mot. 1.9 1/8 HP
Regrig 22 2 lbs 4 oz
min CKT 16 amps
CTK BRKR 20 amps
230 V 60 HZ
MFR DATE 3/85
The inside unit:
Gas fired forced air furnace
115 V 12 Amp 1 PH 60 HZ
Air temp MSE 50-80 deg. F.
Max outlet air temp 190 deg. F.
The wires that are hooked up on the thermostat are G W Y R-RC
(R and RC have a connecter joining them). The only other wire, blue,
is not connected to anything.
The wiring matches the diagram (thermostat manual) for a 1H/1C System
with 1 transformer, where wire C - "optional 24VAC common connection"
- is unhooked.
The thermostat system type is set to '0' - 1 heat/1 cool conventional.
Other options are for a heat pump, heat or cool only, and then
2 heat /2 cool conventional, 2 heat/1 cool conventional, and 1 heat/2
3- Fan Control - set to Gas furnace equipment controls fan in heating.
(Other option is electric furnace controls fan in heating.)
5- Stage 1 Heat Cycle - set to 5, for Gas furnaces with < 90%
efficiency. (other options are > 90% and electric)
9- Stage 1 Compressor cycle rate - set to 3, recommended for most.
(Other options are1 - 6.)
12- Manual/Auto changeover - set to 1, Auto
changeover-heat/cool/auto/off. (Other options are Manual changeover-
heat/cool/off and Auto changeover only- Auto.
15- Compressor protection - 5 minute compressor off time. (Other
options are 0 - 4.)
Other options are not selectable with system type set to '0' - such as
changeover valve, stage 2 heat cycle, auxilliary heat cycle, emergency
heat cycle, and stage 2 compressor.
Does everything look okay? (Heating and cooling is working...)