B O
NOTE
For
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| WIRE | B O | |
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Y | G | W | RC RH | THERMOSTAT | |
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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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Y G W
Cooling Fan Heating System Relay System
THERMOSTAT
RC RH
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| Hot |
24 VAC |
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| 120 VAC | |
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| Neutral |
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HEATING TRANSFORMER (Class II Current Limited)
Hot
24 VAC | 120 VAC |
Figure 2. Typical wiring diagram for
heat only,
Neutral
COOLING TRANSFORMER (Class II Current Limited)
JUMPER
WIRE
Figure 5. Typical wiring diagram for
heat/cool,
THERMOSTAT
B | O | Y | G | W RC | RH |
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| Cooling | Fan |
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| Hot |
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| 24 VAC |
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| B |
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| Neutral | |
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TRANSFORMER
(Class II Current Limited)
| JUMPER | |
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O | Y | G |
Reversing | Compressor | Fan |
Valve* | Contactor | Relay |
JUMPER
WIRE
THERMOSTAT
W RC RH
SYSTEM
Hot
Figure 3. Typical wiring diagram for
cool only, | * Reversing valve is energized when the |
system switch is in the COOL position |
Neutral
TRANSFORMER
(Class II Current Limited)
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RED jumper wire (provided with thermostat) must be |
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connected between thermostat RH and RC terminals | JUMPER |
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for proper thermostat operation with this system. | WIRE |
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B | O |
| Y | G |
| W | RC RH | THERMOSTAT | ||||||||||
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| Cooling |
| Fan |
| Heating |
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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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Figure 4. Typical wiring diagram for
heat/cool,
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 | ||||||||
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Reversing |
| Compressor |
| Fan |
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| Hot | |
Valve* |
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| Contactor |
| Relay |
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| 24 VAC |
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| 120 VAC | |
* Reversing valve is energized when the |
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| Neutral | ||||||
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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 tem- perature. 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
