CONVENTIONAL HVAC SYSTEMS
if your existing | label the wire | |||
thermostat is marked: | with this sticker: | |||
Y1 / Y2 |
|
|
| |
Cooling Stage 1 or 2 | Y1 | Y2 | ||
| ||||
|
|
| ||
|
| Y1 | Y2 | |
W1 / W2 |
|
|
| |
|
|
| ||
Heating Stage 1 or 2 | W1 | W2 | ||
| ||||
|
|
| ||
|
| W1 | W2 | |
|
|
|
| |
if your existing
thermostat is marked:
R / RC | Cooling Transformer |
| Power Supply |
C24 VAC Common
(if available)
label the wire
with this sticker:
R/RC
R/RC
C
C
G |
| G |
| Fan | |
|
| |
|
| G |
RH | Heating Transformer | RH |
| Power Supply |
|
|
| RH |
See pages 72-73 for a complete wiring diagram.
10 |
