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