WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
22
P/N 240008111, Rev. G [06/18/10]
Setting the Controller
Configuration settings for WLCG/WLHG
Figure 28
(available only using unit-mounted keypad)
Setting Item Display
Possible Value
(flashing)
Factory
Settings
Overview
To access:
While in OFF mode,
press MODE and PROG together for 10 seconds, repeat to exit; automatically exits after 20
seconds idle
Temperature
scale
01 F-C
F
C
Fahrenheit
Celsius
F
Select temperature scale for display and operating settings.
Remote
thermostat
02 r–t
ON
OFF
Uses wall
thermostat
Uses internal
temperature
controller
OFF
The unit can operate with its internal temperature controller or by a wall
thermostat. Make sure this setting matches the installation — it must be
set OFF for self-controlled operation.
When set to ON, the wall thermostat controls most functions. Only the
FAN and TIME buttons on the unit are operational (reset from FILTER
CHECK can still be done with the MODE and FAN buttons).
Heat source
03 HEAT
ON
OFF
Available
Not available
See
Note 3
Set this to ON if the unit is equipped with the electric heater option or
matched with a heat pump condenser.
The electric heater is required for DRY mode operation and for
automatic changeover operation.
Heat pump
(see Note 1)
04 H-P
ON
OFF
Available
Not available
OFF
Set this to ON if the unit is built for heat pump operation and connected
to an appropriate compressor unit.
Auto
changeover
differential
(see Note 2)
05 d-b
x
2° – 6°
2°
Auto changeover automatically operates the unit in heating or cooling
based on room temperature versus setpoint.
This setting is the dead band temperature:
Cooling is on while room temperature is at setpoint PLUS dead
•
band.
Heating is on while room temperature is at setpoint MINUS dead
•
band.
Example: setpoint = 68°F, dead band is 3°F — cooling is on with
•
room temperature at or above 71°F — heating is on with room
temperature at or below 65°F.
Check filter
time
06 F:Lt
2
5
7
10
12
250 hours
500 hours
750 hours
1000 hours
1250 hours
10
Set this time for automatic notice of time to change the filter. At the end
of the time period, the control will display a FILTER CHECK warning.
This warning will also appear if four coil freeze-ups should occur in a
24-hour period.
Reset the warning, restarting the time period, by pressing MODE and
FAN buttons together for 3 seconds.
Room air
sampling
07 A:r
OFF
5
10
15
Disabled
5 minutes
10 minutes
15 minutes
15
During stand-by periods, room air sampling causes the fan to cycle
on for 60 sec at the time interval specified here. This ensures the unit’s
temperature sensor will see an accurate sampling of room air (avoiding
comfort problems due to stratification).
Annunciation
08 b-P
ON
OFF
Enabled
Disabled
ON
Set to ON for the unit to emit a beep signal when any button is pushed
with the unit on, and when the ON/OFF button is pushed with the
unit off.
LCD backlight
09 L:tE
ON
In
OFF
Always ON
Intermittent
Always OFF
In
This allows turning off the LCD backlight except when needed. Set to
OFF for the backlight to be off at all times or to ON for the backlight
to be on constantly, even with the unit off. Set to intermittent for the
backlight to come on for 10 seconds when any button is pushed while
the unit is on, and when the ON/OFF button is pushed while the unit
is off.
Setting
Note 1
04
, Heat pump, is
SKIPPED
if setting
03
, Heat source, is
OFF
.
Setting
Note 2
05
, Auto changeover, is
SKIPPED
if setting
03
, Heat source, is
OFF
or if Setting
02
, Remote thermostat, is
ON
.
Factory setting is ON if electric heat is installed in unit, or OFF if electric heat is not installed
Note 3
