GE Zoneline AZ55H12EAB Owner's Manual And Installation Instructions page 6

Auxiliary controls on your Zoneline.
Remote Thermostat–Class 2
When this switch is enabled (UP) , it allows the
unit to operate off of a Class 2 Remote Control
Wall Thermostat. The unit controls are disabled.
Load Shedding (CDC)
This feature is active only if the unit is in
CDC mode. When this switch is enabled (UP) ,
the indoor fan can be turned ON or OFF with
the unit controls.
Freeze Sentinel
When this switch is enabled (UP) , it turns OFF
the freeze sentinel protection feature. With the
switch disabled (DOWN) , the freeze sentinel is
activated which automatically provides heat
without user interface. This helps to prevent
plumbing damage by turning the heater and
indoor fan ON at 41° F and OFF at 46°F.
Constant ON Fan
When this switch is enabled (UP) , it allows the
indoor fan to run continuously, at high speed,
even if the unit is in the STOP position.
Occupancy Sensor
When this switch is enabled (UP) , it allows the
unit to utilize an infrared motion sensor and a
door switch for occupancy detection. This feature
allows an energy management system to be
installed and operated in conjunction with
the unit.
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CLASS 2 (Remote Thermostat)
LOAD SHEDDING (CDC)
FREEZE Sen (Freeze Sentinel)
CONST FAN (Constant
ON Fan)
OCCUPIED
(Occupancy Sensor)