29
WIRING DIAGRAMS (cont.)
Furnace Heat Pump
O
RVS Cooling O/B
W2
Heat Stage 3
(furnace)
WW/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 Modula ting and Single--StageFurnacewith 2--StageHeat Pump