
Wiring requirements and options
Figure 11. Four-pipe heating/cooling unit with auto changeover
Fan status (closed=on)*
Occupancy (open=occupied)*
Condensate overflow (closed=normal)*
24 Vac H N
24 V†
Fan, high speed
24 V†
Exhaust (or fan, medium speed)
24 V†
Fan, low speed
24 V†
Heating/cooling changeover valve
24 V†
Auxiliary heating valve
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| 24 V† |
|
|
| Outdoor air damper actuator |
|
|
| 24 V† |
Open Close | Open Close | Open Close | Generic/baseboard heat |
|
Entering water
LonTalk temperature
Discharge air temperature
| 27 |