Honeywell Thermostat: TH8320U
Re: ADD-ON HEAT PUMP
The TH8320U VisionPro thermostat is capable of direct-control of an add-on heat pump system. (Does not apply to York units with Yorkguard Module)
Requirements:
CONFIGURE THERMOSTAT:
Setup# | Description | Value | Description |
170 | System Type | 7 | 2Ht/1Cl Heat Pump |
190 | Reversing Valve | 0 | Cooling Changeover |
200 | Backup Heat | 1 | Gas |
210 | Fossil Fuel Control | 0 | Thermostat-Controlled |
340 | Remote Sensor | 2 | Outdoor for Control |
350 | Compressor Lockout | 40 | 40 Degrees |
WIRING:
Thermostat | Furnace | Heat Pump |
R | R | R |
C | C | C |
G | G | |
W/Aux | W | W or W1 or 66 or X (Trane) |
Y | Y or Y/Y2 | Y |
O | (wire nut) | O |
S1 | (wire nut) | O/D Sensor 1 |
S1 | (wire nut) | O/D Sensor 2 |
SEQUENCE OF OPERATION:
Cooling Mode
Heating Mode
Em Heat Mode