4 MOUNTING AND WIRING
CONTINUED FROM SECOND PAGE
THERMOSTAT
C‡ B O | Y | G | W | RC RH |
C‡ B O
NOTE
For
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| JUMPER |
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| WIRE |
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Y | G | W | RC RH | THERMOSTAT | |
SYSTEM | |||||
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| Fan | Heating |
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| Relay | System |
| Hot | |
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| 24 VAC | 120 VAC | |
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| Neutral | |
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| TRANSFORMER | ||
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Cooling |
| Fan |
| Heating | |
System |
| Relay |
| System | |
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| SYSTEM | |||||
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| Hot |
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24 VAC |
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| 120 VAC | |
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| Neutral |
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HEATING
TRANSFORMER
24 VAC |
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| Hot |
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| 120 VAC | |
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| Neutral |
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COOLING TRANSFORMER
Figure 2. Typical wiring diagram for
heat only, 3-wire, single transformer systems
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| JUMPER |
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| WIRE |
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C‡ | B | O | Y | G W | RC RH | THERMOSTAT | |
SYSTEM | |||||||
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| Cooling | Fan |
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| System | Relay |
| Hot | |
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| 24 VAC | 120 VAC | |
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| Neutral | |
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| TRANSFORMER | ||
Figure 3. Typical wiring diagram for
cool only, 3-wire, single transformer systems
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RED jumper wire (provided with thermostat) must be |
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connected between thermostat RH and RC terminals | JUMPER | |||
for proper thermostat operation with this system. | ||||
WIRE | ||||
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| THERMOSTAT | |
C‡ | B | O | Y | G | W | RC RH | SYSTEM |
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| Cooling | Fan | Heating |
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| System | Relay | System |
| Hot |
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| 24 VAC | 120 VAC |
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| Neutral |
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| TRANSFORMER | |
Figure 4. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
‡The 24 Volt neutral connection to terminal C on the thermostat is not required if the batteries are replaced once a year with fresh “AA” Energizer® alkaline batteries.
Figure 5. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
JUMPER JUMPER
WIREWIRE
C‡ B O | Y | G W | RC RH | THERMOSTAT | |
SYSTEM | |||||
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Reversing | Compressor | Fan |
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Valve* | Contactor | Relay |
| Hot | |
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| 24 VAC | 120 VAC | |
* Reversing valve is energized when the |
| Neutral | |||
system switch is in the COOL position | TRANSFORMER | ||||
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Figure 6. Typical wiring diagram for heat pump
with reversing valve energized in COOL
JUMPER JUMPER
WIREWIRE
C‡ | B O | Y | G W | RC RH | THERMOSTAT | |
SYSTEM | ||||||
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| Reversing Compressor | Fan |
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| Valve* | Contactor | Relay |
| Hot | |
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| 24 VAC | 120 VAC | |
| * Reversing valve is energized when the |
| Neutral | |||
| system switch is in the HEAT position | TRANSFORMER | ||||
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