B O Y G | W RC RH |
Heating |
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System |
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| 24 VAC Transformer |
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| Thermopile |
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B O
NOTE
RED jumper wire (provided with thermostat) must be connected between thermo- stat'sRH and RC terminals for proper thermostat oper- ation with this system.
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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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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 3. Typical wiring diagram for heating only,
2-wire, single transformer systems or millivolt systems
Figure 7. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
Thermostat
R W
| NOTE |
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Jumper wire must be | ||||
Primary Control | ||||
added between R and B | ||||
terminals on the | primary | (located at furnace) | ||
control (jumper | wire not | B | ||
provided with thermostat). | ||||
W |
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R |
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Add jumper wire | Furnace |
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(not provided with thermostat) |
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THERMOSTAT
B O Y | G | W | RC RH |
Cooling | Fan | Heating |
System | Relay | System |
SYSTEM
Hot
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24 VAC |
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| 120 VAC | |
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Neutral
HEATING TRANSFORMER
24 VAC |
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| Hot |
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| 120 VAC | |
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Neutral
COOLING TRANSFORMER
Figure 4. Typical wiring diagram for
Figure 8. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
B O Y
NOTE
RED jumper wire (provided with thermostat) must be connected between thermo- stat'sRH and RC terminals for proper thermostat oper- ation with this system.
JUMPER
WIRE
G | W | RC | RH | THERMOSTAT | |
SYSTEM | |||||
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Fan | Heating |
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Relay | System |
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| Hot | |
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| 24 VAC | 120 VAC | |
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| Neutral | |
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| TRANSFORMER | ||
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| JUMPER | JUMPER |
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| WIRE | WIRE |
| Y |
| THERMOSTAT |
B O | G W | RC RH |
SYSTEM
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 5. Typical wiring diagram for
heat only, 3-wire, single transformer systems
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 9. Typical wiring diagram for
heat pump with cool active reversing valve
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 |
| Neutral | ||||
system switch is in the HEAT position | TRANSFORMER | |||||
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Figure 6. Typical wiring diagram for | Figure 10. Typical wiring diagram for |
cool only, | heat pump with heat active reversing valve |
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CHECK THERMOSTAT OPERATION
If at any time during testing your system does not operate properly, contact a qualified serviceperson.
Fan Operation
If your system does not have a G terminal connection, skip to Heating System.
1.Turn on power to the system.
2.Move fan switch to ON position. The blower should begin to operate.
3.Move fan switch to AUTO position. The blower should stop immediately.
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 tempera- ture. The heating system should stop operating.
3
