C‡ B O
NOTE
For
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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 |
THERMOSTAT
C‡ 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
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| THERMOSTAT |
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B | O |
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| G | W | RC | RH |
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| SYSTEM |
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| Cooling |
| Fan |
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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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| TRANSFORMER |
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| Figure 3. Typical wiring diagram for |
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| NOTE |
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RED jumper wire (provided with thermostat) must be |
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connected between thermostat RH and RC terminals |
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for proper thermostat operation with this system. |
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| WIRE |
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C‡ | B | O |
| Y |
| G | W |
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| RC | RH | THERMOSTAT |
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| SYSTEM |
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| Cooling |
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| 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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| TRANSFORMER |
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Neutral |
COOLING TRANSFORMER
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 |
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| Hot | |
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| 24 VAC | 120 VAC | |
| * Reversing valve is energized when the |
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| 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 | |||||||
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| JUMPER |
| JUMPER |
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| WIRE |
| WIRE |
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C‡ | B O | Y | G | W | RC RH | THERMOSTAT | ||
SYSTEM | ||||||||
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| Reversing | Compressor | Fan |
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| Valve* |
| Contactor | Relay |
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| 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 |
Figure 7. Typical wiring diagram for heat pump
Figure 4. Typical wiring diagram forwith reversing valve energized in HEAT heat/cool,
‡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.
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 thermostat setting below room tempera- ture. 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 thermostat setting above room tempera- ture. The cooling system should stop operating.
3