
Wiring requirements and options
Figure 17. Four-pipe heating/cooling unit with face-and-bypass damper
24 V† Fan, high speed
Fan status (closed=on)*
Occupancy (open=occupied)*
Condensate overflow (closed=normal)*
24 Vac H N
24 V†
Exhaust (or fan, medium speed)
24 V†
Fan, low speed
24 V†
Cooling isolation valve, open/close
24 V†
Face and bypass damper actuator
24 V†
Heating isolation valve, open/close 24 V†
Outdoor air damper actuator
Open | Close | Open Close | 24 V† | |
Generic/baseboard heat | ||||
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Entering water
LonTalk temperature
Discharge air temperature
| 33 |