www.retroaire.com
The Right Fit For Comfort
14
RetroAire Single Motor PTACS are designed and con-
structed for reliability and long life with minimal mainte-
nance but service or repairs should only be performed
by qualified service personnel.
!
!
WARNING
CLEANING AND MAINTENANCE
MOTORIZED FRESH AIR DAMPER (Optional)
The optional motorized damper allows fresh air to be brought
into the room. By moving the “Fresh Air” switch to the
Yes
position, outside air will be brought into the room when the
indoor fan is circulating air. To circulate indoor air without
fresh air, set the “Fresh Air” switch to the
No
position.
CHANGEOVER T-STATS (Heat pump only)
On units with a changeover thermostat, the compressor will
run until just above freezing (40
°
F) and then shut off. Electric
heat will then energize and assume the heating demand
until the temperature of the outdoor air rises to approximately
50
°
F.
CLEANING THE INTERIOR OF THE UNIT
1. Disconnect power from unit.
2. Remove access panels and do a visual
inspection of the unit, making sure to check for
obvious problems such as broken wires, damaged
coils, or evidence of extended wear on any moving
part.
3. Check for unusual odors, oil leaks, or stains on
or around the coil and refrigerant lines. The
presence of oil here may indicate a potentially
serious problem such as a refrigerant leak.
4. Inspect all electrical connections. Look for
frayed wires and poor connections. Terminal ends
that are loose will eventually fail, causing a loss
of performance or worse.
5. Check fan motors and blower assemblies.
Some units may require a drop of light oil to motors
and/or bearing assemblies (look for oil cups).
Check setscrews and motor mounting hardware,
making sure they are tight.
IMPORTANT:
The Single-Motor PTAC is equipped
with a permanently lubricated motor. Although oiling
is not necessary, adding a few drops through the oiling
ports twice yearly will extend the life of the motor. Do
NOT over oil!!
6. Brush and/or vacuum the centrifugal fan blades and
blower cage assemblies. These parts must be clean
to operate efficiently.
7. Inspect and clean the indoor and outdoor coils, using a
fin comb, if necessary, to straighten any damaged fins.
These coils must be clean for proper operation.
IMPORTANT: Do not use a solvent-based cleaner
when cleaning the indoor or outdoor coils. Some
solvents can produce a noxious odor when starting
the fan or electric heat.
8. Inspect and clean the drain pan and drain line (if any).
Use of an anti-fungicide tablet is recommended to keep
the condensate system free from bacterial
contaminants.
9. Check the pitch of the unit and wall sleeve. Over time,
the building and equipment may settle, causing a shift
in the direction of the condensate flows. Ideally, the
unit should pitch a minimum of 5° (at least ½”) to the
outside to allow for proper drainage.
10. Replace panels and reconnect electrical power.
11. Test unit operation.
RETROAIRE PTAC OPERATION (Continued)
