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 | |||||
|
|
|
| ||
Fan | Heating |
|
|
| |
Relay | System |
|
| Hot | |
|
|
| 24 VAC | 120 VAC | |
|
|
|
| Neutral | |
|
|
| TRANSFORMER | ||
THERMOSTAT
B O Y | G | W | RC RH |
Cooling | Fan | Heating |
System | Relay | System |
|
|
|
| SYSTEM | ||||||
|
|
| ||||||||
|
|
|
|
|
|
|
|
| Hot | |
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
24 VAC |
|
|
|
|
|
|
| 120 VAC | ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Neutral | ||
|
|
|
|
|
| |||||
HEATING TRANSFORMER | ||||||||||
24 VAC |
|
|
|
|
|
|
| Hot | ||
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
| 120 VAC | |||
|
|
|
|
|
|
|
|
|
|
|
Figure 5. Typical wiring diagram for
heat only, 3-wire, single transformer systems
B | O | Y | G W RC RH | THERMOSTAT | |
SYSTEM | |||||
|
|
|
| ||
|
| Cooling | Fan |
| |
|
| System | Relay | Hot | |
|
|
| 24 VAC | 120 VAC | |
|
|
|
| Neutral |
Figure 6. Typical wiring diagram for
cool only, 3-wire, single transformer systems
|
|
|
| JUMPER |
|
|
|
| WIRE |
|
| Y |
| THERMOSTAT |
B | O | G | W RC RH | |
|
|
|
| SYSTEM |
| NOTE |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Cooling |
| Fan |
| Heating |
|
|
|
|
|
|
|
|
|
|
| |||
RED jumper wire | (provided |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
| System |
| Relay |
| System |
|
|
|
|
|
|
|
|
|
|
| ||||
with thermostat) | must be |
|
|
|
|
|
|
|
|
|
|
|
| Hot | ||||||
connected between thermo- |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
| 24 VAC |
|
|
|
|
|
|
| 120 VAC | ||||||
stat'sRH and RC terminals |
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||
for proper thermostat oper- |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
| Neutral | ||||||
ation with this system. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
| |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
TRANSFORMER
Figure 7. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
Neutral
COOLING TRANSFORMER
Figure 8. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
| JUMPER | |
| WIRE | |
B O | Y | G W |
Changeover | Compressor | Fan |
Relay* | Contactor | Relay |
*Changeover relay is energized when the system switch is in the COOL position
JUMPER
WIRE
THERMOSTAT
RC RH
SYSTEM
Hot
24 VAC | 120 VAC |
Neutral
TRANSFORMER
Figure 9. Typical wiring diagram for
heat pump with cool active changeover relay
|
| JUMPER | |
|
| WIRE | |
B | O | Y | G W |
Changeover | Compressor | Fan | |
Relay* |
| Contactor | Relay |
*Changeover Relay is energized when the system switch is in the HEAT position
JUMPER
WIRE
THERMOSTAT
RC RH
SYSTEM
| Hot |
24 VAC | 120 VAC |
Neutral
TRANSFORMER
Figure 10. Typical wiring diagram for
heat pump with heat active changeover relay
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.
Cooling System
This thermostat has a
!CAUTION
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
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.
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 tempera- ture. The cooling system should stop operating.
3