WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
30
P/N 240008111, Rev. G [06/18/10]
Wall Thermostat Operation
(continued)
FAN operation
The indoor unit utilizes a two-speed motor.
The unit controller FAN button will allow
•
the selection of the desired fan speed set-
ting (High or Low).
The wall thermostat will control the call-
•
for-fan operation (on or off) through the
low volt terminals, R and G.
After the room thermostat has been satisfied
and the call for fan has been removed, the
indoor fan will remain on for an additional
60 seconds. This increases efficiency by pull-
ing the remaining energy from the unit.
Some thermostats are equipped with an
AUTO/ON fan switch.
When this switch is placed in the ON
•
position, the indoor fan will run con-
tinuous.
When the switch is in the AUTO position,
•
the indoor fan will cycle with the call for
heating or cooling.
COOLING operation
The wall thermostat will control the call for
cooling operation (on or off) through the low
volt terminals, R and Y.
After connecting the thermostat to the unit,
place the system switch in Cool mode.
Adjust the set-point temperature below
•
the room temperature.
The compressor and fan motors will start
•
and cooling will begin.
Next, place the set-point temperature above
the room temperature.
The outdoor condenser will stop.
•
The fan will operate as described in FAN
•
operation.
NOTICE
Once cooling has cycled off or following
a power outage, the compressor will not
start for at least three minutes (short-
cycle protection).
