NOTE
All wiring diagrams are for typical systems only. Refer to equipment manufacturers' instructions for specific sys- tem wiring information.
!CAUTION
To prevent electrical shock and/or equipment damage, disconnect electrical power at the main fuse box or circuit breaker until installation is complete.
THERMOSTAT
Y | G | W | RC | RH |
SYSTEM
Heating
System
Hot
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| 24vAC |
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| 120vAC |
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Neutral
TRANSFORMER
From heating system
From 24vAC transformer
W
W
RC
G
RH | Y |
RH 
Thermostat Terminal Connections
Figure 4. Typical Wiring Diagram for Heating Only,
Y
NOTE
RED jumper wire (pro- vided with thermostat) must be connected be- tween thermostat's RH and RC terminals for pro- per thermostat operation with this system.
G
Fan
Relay
JUMPER
WIRE
THERMOSTAT
W | RC | RH |
SYSTEM
Heating
System
Hot
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24vAC |
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| 120vAC | |
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Neutral
TRANSFORMER
From 24vAC
transformer
From heating system
W | W | |
RC | ||
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G | G | |
RH | Y | |
RH | From fan relay |
CONNECT red jumper
wire (provided)
Thermostat Terminal Connections
Figure 5. Typical Wiring Diagram for Heat Only,
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| transformer |
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Y | G | W | RC | RH | THERMOSTAT |
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SYSTEM |
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| RC | |
Cooling | Fan |
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| G | ||
System | Relay |
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| RC | G | |
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| Hot |
| Y | |
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| Y | ||
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| 24vAC | 120vAC RH |
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| From fan relay |
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| Neutral |
| From cooling system | |
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| TRANSFORMER | Thermostat Terminal Connections | |||
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Figure 6. Typical Wiring Diagram for Cool Only,
4
