Cleaning
Apply power to DR90/DR120A3000. Turn the humidity control to a low RH% level to initiate a dehumidifica-
tion call. Confirm that the DR90/DR120A3000 compressor and fan turn on. The furnace blower will also turn
on to circulate air. This will take up to two minutes. Be sure to turn the control to the desired RH% or to Off
when checkout is complete.
Checkout
DR90/DR120A3000 Dehumidification System 33-00298EFS—01 11
On an annual basis, perform the following maintenance requirement to ensure the dehumidifier runs at peak
efficiency.
Unplug DR90/
DR120A3000
before beginning
service. Remove
the magnetic
filter door.
Cut and remove plastic strap
holding compressor in place.
This strap is only used for
shipping.
Remove filter
and replace
with new filter.
Apply power to DR90/
DR120A3000. Turn humidity
control to a low RH% to initi-
ate a dehumidification call.
Confirm that the compressor
and fan turn on. The furnace
blower will also turn on to cir-
culate air. Be sure to turn the
control to the desired RH% or
to Off when the checkout is
complete.
Remove cover on output side of dehu-
midifier. Using a damp cloth, remove
excess dust and debris from blower and
internal cabinet. Reattach cover when
finished.
If using for ventilation, initiate
a call for ventilation. Confirm
that the DR90/DR120A3000
fan turned on, but that the
compressor remained off.
When service is complete, initiate a call for dehumidification and check that the
compressor and fan activate. If using the VisionPRO IAQ or TrueIAQ controls, reset
maintenance reminders.
Check the drain connection and drain
line to ensure it is clear of debris and
sludge. Ensure all hose connections
are secure once maintenance of the
drain lines is complete.
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