Scheduled Maintenance - McQuay Type K Incremental Packaged Terminal Air Conditioner Installation & Maintenance Data

Scheduled Maintenance

Incremental conditioners are built to last. With proper care,
the unit should provide uninterrupted service for many years.
Scheduled maintenance of this equipment, as described
below, is the key to the equipment's longevity.
Air filters must be cleaned at regular intervals. Twice
annually may be adequate in some areas while twice monthly
may be required in others. Areas with high dirt and lint
content or heavy usage of units require more frequent filter
maintenance that those areas of relatively clean operating or
low usage conditions. Unit malfunction may occur if air
filters are not kept clean.
The standard filter supplied with the Type K unit is a
permanent wire mesh type. This type of filter should be rinsed
with hot water and a mild detergent. Let dry and oil lightly to
enhance dust collecting ability.
The Type K is also available with a carbon filter, a zeolite
filter or electrostatic filter. The electrostatic filter is renewable
by rinsing with hot water and replacing in the unit once dry.
The carbon or zeolite filters must be discarded and replaced.
The frequency of this replacement depends on the air quality
of the room being filtered. Rooms with heavy smoke or
ammonia content will require more frequent filter changes
than rooms with minimal degrees of smoke or ammonia.
Note: When replacing the standard filter with an
optional carbon, electrostatic, or zeolite filter, compress
the filter brackets slightly. The optional filters are slightly
thinner than the standard filter and will stay in place
better if the brackets are squeezed slightly.
It is recommended that the chassis be removed every year
for a thorough check-up. The heat section need not be
removed but should be inspected or cleaned if necessary.
Should the heat section blowers or motor need service, the
entire fan board can be easily removed from the unit for
service.
To access the unit for cleaning or service, proceed as
follows:
WARNING
!
Residential and institutional cleaning compounds can cause
permanent damage to the packaged terminal unit. To avoid
damage to unit controls and heat transfer surfaces, do not
spray cleaning compounds onto the return air opening or unit
controls.
Normal cleaning can be accomplished by wiping the unit
surface with a damp cloth. When using cleaning compounds on
carpets, floors or walls, turn the unit off to avoid drawing potentially
damaging vapors into the package terminal unit.
1. Disconnect power to the unit.
2. Remove the front panel and the kickplate.
IM 1068 / Page 26 of 32
3. Unplug the chassis from the control box and remove the
chassis from the wall sleeve. Replace with spare chassis
or weatherplate.
4. Move chassis to maintenance area and check all seals,
wires, and insulation and repair as required.
5. Cover motor and protect all electrical components before
washing dirt from chassis.
6. Clean condensate drain and clear weep holes.
7. Dry equipment thoroughly, especially electric parts and
insulation.
8. Clean any rust spots with steel wool and paint with rust
inhibiting paint.
9. Check all fasteners and tighten if necessary.
10. Check the motor nameplate for routine oiling
instructions.
11. Test run chassis before reinstalling or returning to spare
parts stock.