WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10]
27
Unit-Mounted Controller Operation
(continued)
(Heat source ON, heat pump ON). See (Fig-
ure 28, Page 22).
For heat pump operation with backup electric
heat, first turn the unit on via the ON/OFF
button.
Select Heat mode via the Mode button.
•
The room temperature and setpoint tem-
•
perature will be displayed.
Press either the Up or Down arrow but-
•
tons to change the setpoint temperature.
The setpoint temperature will change by
•
one degree with each successive press of
the Up or Down arrow buttons. Holding
the button in will change the temperature
rapidly.
Place the setpoint temperature above the
room temperature by one degree.
The compressor will start and heating will
•
continue for a minimum of two minutes
and as long as the setpoint remains above
room temperature.
When the room temperature has been
•
satisfied for at least 60 seconds and the
minimum on time has elapsed, the com-
pressor will switch off.
The fan will operate as described in Fan
•
operation, page 25.
Place the setpoint temperature above the
room temperature by at least two degrees.
The compressor will start and, the electric
•
heat will also energize after a 30 second
delay, thus two-stage heating.
The electric heat will run for a minimum
•
of two minutes and until the deviation
between room temperature and setpoint
temperature is less than two degrees.
At that time the electric heat will switch
•
off and the heat pump (compressor) will
take over the heating demand.
The electric heater will not re-start until a
•
three minute delay has elapsed.
Once the room temperature is satisfied
•
and the two-minute minimum run time
has elapsed, the compressor will cycle
off.
The compressor will not re-start until a
•
three minute delay has elapsed.
The fan will operate as described in Fan
•
operation, page 25.
DRY mode
For Dry mode operation the unit must have
an electric heater. Also the control must first
be configured properly (Heat source ON).
See (Figure 28, Page 22).
Dry mode will remove humidity from the air
while maintaining setpoint temperature.
This is done by energizing the compressor
•
in cooling along with the electric heater.
Dry mode will not maintain a specific
•
humidity level.
The unit must be equipped with an op-
•
tional electric heat element.
For Dry Mode operation, first turn the unit
on via the ON/OFF button.
Select Dry mode via the MODE button.
•
The room temperature and setpoint tem-
•
perature will be displayed.
Press either the Up or Down arrow but-
•
tons to change the setpoint temperature.
The setpoint temperature will change by
•
one degree with each successive press of
the Up or Down arrow buttons. Holding
the button in will change the temperature
rapidly.
Place the setpoint temperature at a desired
room temperature.
Depending on the difference between
•
room temperature and setpoint tempera-
ture the compressor and/or heat source
will energize.
If the room temperature and setpoint
•
temperature are the same the compressor
will operate in cooling and the electric
heat will also energize.
Should the room temperature fall below
•
the setpoint temperature by two degrees,
the compressor will stop and heating will
