Cleaning
Apply power to DR90A3000/DR120A3000. Turn the humidity control to a low RH% level to initiate a
dehumidification call. Confirm that the DR90A3000/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.
If using for ventilation, initiate a call for ventilation. Confirm that the DR90A3000/DR120A3000 fan turned
on, but that the compressor remained off.
Checkout
DR90A3000/DR120A3000 Dehumidification System 33-00298EFS—09 11
On an annual basis, perform the following maintenance requirement to ensure the dehumidifier runs at peak
efficiency.
Unplug
DR90A3000/
DR120A3000
before beginning
service. Remove
the magnetic
filter door.
Remove filter
and replace
with new filter.
When service is complete, initiate a
call for dehumidification and check
that the compressor and fan activate.
If your thermostat has maintenance
reminders, reset those.
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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