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.
Cut and remove plastic strap
holding compressor in place.
This strap is only used for
If using for ventilation, initiate
a call for ventilation. Confirm
that the DR90/DR120A3000
fan turned on, but that the
compressor remained off.
On an annual basis, perform the following maintenance requirement to ensure the dehumidifier runs at peak
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
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
DR90/DR120A3000 Dehumidification System 33-00298EFS—01
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
with new filter.
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.