B O
NOTE
For
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| JUMPER |
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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 | ||
THERMOSTAT
B O Y | G | W | RC RH |
Cooling | Fan | Heating |
System | Relay | 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 |
Figure 2. Typical wiring diagram for
heat only, 3-wire, single transformer systems
JUMPER
WIRE
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 | |
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
Neutral |
COOLING TRANSFORMER
Figure 5. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
JUMPER JUMPER
WIREWIRE
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 |
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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
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 |
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system switch is in the HEAT position | TRANSFORMER | ||||
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Figure 7. Typical wiring diagram for heat pump
with reversing valve energized in HEAT
Heating System
1.Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.
2.Press 
to adjust thermostat setting above room tempera- ture. The heating system should begin to operate.
3.Press 
to adjust temperature setting below room tem- perature. The heating system should stop operating.
Cooling System
▲! CAUTION
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
1.Move SYSTEM switch to COOL position.
2.Press 
to adjust thermostat setting below room tempera- ture. The blower should come on immediately on high speed, followed by cold air circulation
3.Press 
to adjust temperature setting above room tem- perature. The cooling system should stop operating.
3