Installation and Operation Manual -
WHDEHUM-90P
10
Press down both arrow buttons again to turn off
TEST MODE (continual on function).
Step 2
Press the Central Control button until the Whole-
House light turns OFF, which indicates the unit is
configured for Standalone/Unit Mode of operation.
Step 3
Next, see the Humidity Screen Display, which will
indicate the current local humidity. Use the Up/
Down arrow buttons to set the humidity set point for
the dehumidifier. If the humidity rises above the set
point, then the dehumidifier will switch ON and run
continuously until the humidity set point is achieved.
There may be a 1-2 minute delay when the unit starts
a dehumidifier ON cycle before it actually begins
dehumidifying, as there is a compressor warm-up
cycle required and indicated by a red Compressor
light. Likewise, if powering OFF, there may be a short
one minute delay required for the unit to cycle down
and shut off.
Step 4
From there, the unit will run and only needs to be
switched OFF for cleaning and maintenance if
necessary.
Whole-House Configuration
After the dehumidifier is properly installed, ducted,
humidistat control wired, connected to AC power,
and condensate drain plumbed, standard operation
can be configured and initiated.
Step 1
Be sure to turn OFF the Dehumidifier Mode on the
external humidistat controller before switching on
the dehumidifier. Also, if an external float switch
is being used for the condensate drain circuitry, be
sure the condensate tank is empty or near empty
and the associated float switch is open.
Step 2
Push the power switch to turn the dehumidifier ON.
Step 3
Press the Central Control button until the Whole-
House light turns on, which indicates the unit is
configured for Whole House Mode of operation.
After a very brief delay, the dehumidifier will switch
into the Whole-House Mode.
Step 4
After setting the unit for Whole-House Mode in Step
3 above and from this point forward, the dehumidifier
is exclusively controlled by the dehumidistat. At this
time, the humidistat controller can be turned on and
the humidity setting adjusted accordingly. When
the humidistat signals the need for dehumidification,
there may be a 1-2 minute delay when the unit
starts a dehumidifier ON cycle before it really begins
dehumidifying, as there is a compressor warm-up
cycle required and indicated by a red Compressor
light. Likewise, if powering OFF, there may be a short
one minute delay required for the unit to cycle down
and shut off.
From here on, the unit will run and only needs to be
switched off for cleaning and maintenance if necessary.
WHDEHUM-90P
Cleaning the Machine Body
Use a soft damp cloth to clean exterior of unit. Do
not use any soap or solvents.
Cleaning the Filter (See Figure 7)
1.
Unplug the unit.
2.
Rotate the air inlet grille counterclockwise to
remove.
3.
Clean the filter mesh by vacuuming or washing
with warm water (no soap or solvents).
4.
Reinsert the air inlet grille by rotating it
clockwise onto the unit.
5.
Be sure filter is completely dry before restarting
unit.
Coil Maintenance
Once per year, clean the coils with an approved
coil cleaner. Coil cleaner should be a self-rinsing,
foaming cleaner such as WEB
®
Coil Cleaner.
Maintenance
2
3
4
Figure 7.
WHDEHUM-90P Maintenance Diagram
