29
WIRING DIAGRAMS (cont.)
Furnace
Heat Pump
O
RVS Cooling
O/B
W2
Heat Stage 3
(furnace)
W
W/W1
W2*
Heat/Cool Stage 1
Y1
Y1
Heat/Cool Stage 2
Y/Y2
Y/Y2
Y/Y2
Fan
G
G
24VAC Hot Heating
Rh
R
R
24VAC Hot Cooling
Rc
DHUM
24VAC Common
C
COM
C
Y1
**
* Some heat pumps may designate W1.
**Remove jumper when using split power (Indoor and Outdoor Units
utilize separate transformers).
Thermostat
A12241
Fig. 9 -- Variable Speed, Multi--Stage, Stage Modulating and Single--Stage
Furnace with 2--Stage Heat Pump
