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Robertshaw RS9220 Programmable Thermostat Installation Guide
WIRING
Terminal Designations
C
O
24 VAC Common
Heat pump reversing valve energized
In cooling
B
Heat pump reversing valve energized
in heating
W
Heat relay Stage 1
W2 Heat relay Stage 2
RH 24 VAC power for heating
RC 24 VAC power for cooling
G
Y
Fan relay
Compressor relay Stage 1
Y2 Compressor relay Stage 2
Notes
Wire specifications
Use 18- to 22-gauge thermostat wire.
Shielded wire is not required.
Common wire
The C (common wire) is optional when
the thermostat is powered by batteries.
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| General | Details |
|---|---|
| Name | Robertshaw RS9220 Programmable Thermostat Installation Guide |
| Make | Robertshaw |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.43 MB |
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