4.Connect ground wire to ground lug.
T2 T1
L2 L1
A
L2 L1
B
C
A. Ground lug
B. Field supply ground wire
C. 208/230 volt field supply wires
5.Connect low voltage circuit.
Typical Wiring Connection (low voltage circuit)
NOTE: Some connections may not apply.
Refer to specific thermostat and indoor unit.
Without Auxiliary Heat
| Thermostat | Indoor Unit | Outdoor Unit |
| ||
A | R | Power | R | Power | R | B |
|
| |||||
| C |
| C | Common | C |
|
|
|
|
| |||
| W1 | 1st Stage | W1 | 1st Stage | W1 |
|
| Aux. Heat | Aux. Heat |
| |||
|
|
|
|
| ||
|
|
| W2 |
|
|
|
|
|
| W3 |
|
|
|
| G | Indoor Blower | If Applicable |
|
| |
|
| G |
|
| ||
| O | Reversing Valve |
| O |
| |
|
|
|
|
| ||
| Y1 |
| Y1 |
| Y1 |
|
|
| Compressor |
|
|
| |
| Y2 |
| Y2 |
| Y2 |
|
|
| With Auxiliary Heat |
|
| ||
| Thermostat | Indoor Unit | Outdoor Unit |
| ||
A | R | Power | R | Power | R | B |
|
|
|
| |||
| C |
| C | Common | C |
|
|
|
|
| |||
|
| Emergency Heat | Emergency |
|
| |
| E | Heat Relay |
|
| ||
|
|
|
|
|
| |
|
| 1st Stage |
| Outdoor |
| |
| W1 | W1 | Thermostat W1 |
| ||
|
| Aux. Heat |
| 1st Stage Aux. Heat |
| |
|
|
| W2 |
| ||
|
|
| W3 |
|
|
|
| G | Indoor Blower | If Applicable |
|
| |
|
| G |
|
| ||
| O | Reversing Valve |
| O |
| |
|
|
|
|
| ||
| Y1 |
| Y1 |
| Y1 |
|
|
| Compressor |
|
|
| |
| Y2 |
| Y2 |
| Y2 |
|
A. Do not connect C (common) connection between indoor unit and thermostat except when required by the indoor thermostat. Refer to the thermostat installation instructions.
B. C (common) connection between indoor unit and outdoor unit required for proper operation.
6.Replace control box cover.
7.Reconnect power.
10
