Maytag Amana PMH Series Service And Troubleshooting page 49

SERVICING
Maintenance and Cleaning
Complete PTAC maintenance and cleaning instructions can
be found in IO-447*.
DigiAIR™ Intake Air Filter
To properly maintain the operational performance of your
DigiAIR™ Make-up air module, it is extremely important
that the inlet air filter be cleaned, at minimum, every 3
months or more often if operated in dusty or dirty locations
or conditions. Dirty filters will dramatically reduce both the
supplied CFM of outside air as well as lower the dehumid-
ification of the air passing through the DigiAIR™ module.
The intake air filter is constructed of durable polypropylene,
and is designed to be permanent and washable.
Filters should be checked frequently after initial installation
and operation and cleaned as required. This will assist in
establishing the proper time interval to maintain for future
scheduled cleaning.
Before cleaning the intake filter, turn off the power to the
entire PTAC unit and unplug the unit from the power recep-
tacle.
The following procedure is used to remove the intake filter:
1. Pull the PTAC unit out from the wall sleeve sufficiently
to allow access to the filter. See complete instructions
for removing and reinstalling the PTAC chassis from the
wall sleeve in IO-447*.
2. Grasp the filter by its molded handle, located on the
side of the kit (see Figures 1 & 2).
3. Pull the filter straight out from the side and remove.
NOTE: Spare filters are available and you can also replace
the existing filters with new ones and remove the dirty fil-
ters to a central location to thoroughly clean and have them
Vent Panel
Screw Hole
Figure 5
ready for the next filter check.
4. Clean filter with vacuum or with running water. Reverse
this procedure to reinstall the filter.
5. Also inspect and clean the vent door as needed to
remove material that can restrict air flow into the DigiAIR
module. It is also recommended that the condensate
drainage is checked while the DigiAIR™ filter is being
cleaned or replaced. Make sure that water is proper-
ly allowed to drain from the PTAC base pan and wall
sleeve or drainage system. Also, with the added con-
densate volumes from the DigiAIR™ system, manufac-
tured approved time released algaecide pads should be
considered to keep the water flowing properly.
6. Reinstall the PTAC chassis into the wall sleeve. Rein-
state power to the PTAC and make sure that the Di-
giAIR™ power switch is in the on position.
7. While the R410A PTAC is not actively conditioning the
air and the PTAC fan(s) are in the off position, check
to make sure that air is flowing through the DigiAIR™
module into and through the PTAC into the room.
Obtaining Service for DigiAIR™
In the event this unit requires repair or servicing beyond
what is covered in this manual, contact an authorized ser-
vice organization.
To obtain an authorized servicer, contact your sales repre-
sentative or agency.
Power Cord
1. Remove the unit front by tilting the bottom of the front
outward and then lift the front straight up.
2. Remove the control knobs on the control panel cover by
pulling upward on the knobs. Remove the escutcheon.
3. Remove the control panel cover by removing the two
screws holding the control panel cover. Tilt the control
panel forward to gain access to the wires.
4. Remove the power cord clamp located near the bottom
right of the chassis.
Control
Panel
Power Cord Clamp
Power
5. On 115 volt or 230/208 volt units disconnect the white
lead from the LINE 1 terminal on the control board and
the black lead from LINE 2 terminal on the control board
and the green ground wire from the partition panel.
On 265 volt units disconnect the ribbed lead from the LINE
1 terminal on the control board and the smooth lead from
the fuse holder and the green ground wire from the parti-
tion panel.
Right Side
Of Unit
Incoming
Power
Opening
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