EMI WLHG09 - Setting the Controller

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 seings.
Remote
thermostat
02 r–t
ON
OFF
Uses wall
thermostat
Uses internal
temperature
controller
OFF
e unit can operate with its internal temperature controller or by a wall
thermostat. Make sure this seing 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 buons on the unit are operational (reset from FILTER
CHECK can still be done with the MODE and FAN buons).
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.
e 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.
is seing 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 lter. At the end
of the time period, the control will display a FILTER CHECK warning.
is 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 buons 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 specied here. is ensures the unit’s
temperature sensor will see an accurate sampling of room air (avoiding
comfort problems due to stratication).
Annunciation 08 b-P
ON
OFF
Enabled
Disabled
ON
Set to ON for the unit to emit a beep signal when any buon is pushed
with the unit on, and when the ON/OFF buon is pushed with the
unit o.
LCD backlight 09 L:tE
ON
In
OFF
Always ON
Intermittent
Always OFF
In
is allows turning o the LCD backlight except when needed. Set to
OFF for the backlight to be o at all times or to ON for the backlight
to be on constantly, even with the unit o. Set to intermient for the
backlight to come on for 10 seconds when any buon is pushed while
the unit is on, and when the ON/OFF buon is pushed while the unit
is o.
Seing Note 1 04, Heat pump, is SKIPPED if seing 03, Heat source, is OFF.
Seing Note 2 05, Auto changeover, is SKIPPED if seing 03, Heat source, is OFF or if Seing 02, Remote thermostat, is ON.
Factory seing is ON if electric heat is installed in unit, or OFF if electric heat is not installedNote 3