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Checkout
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. If the RF
and GF on the DR90A3000/DR120A3000 is wired to the furnace, the furnace fan should also run. 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.
NOTE: Starting with revision 2 models (a sideways 2 after the model number on the sticker), the
dehumidifier may enter a 2-5 minute delay to protect the compressor from short cycling.
Cleaning
On an annual basis, perform the following maintenance requirement to ensure the dehumidifier runs at peak
efficiency.
Unplug
1
DR90A3000/
DR120A3000
before beginning
service. Remove
the magnetic
filter door.
Check the drain connection and drain
3
line to ensure it is clear of debris and
sludge. Ensure all hose connections
are secure once maintenance of the
drain lines is complete.
DR90A3000/DR120A3000 Dehumidification System 33-00298EFS—15
Remove filter
2
and replace
with new filter.
When service is complete, initiate a
4
call for dehumidification and check
that the compressor and fan activate.
If your thermostat has maintenance
reminders, reset those.
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