3
System Maintenance
CAUTION:
Be certain all electrical power
to the unit is disconnected
before performing the following
recommended maintenance.
Proper maintenance is most important
to achieve the best performance
from the appliance and should be
performed by a qualified service
technician at least once a year. Follow
the maintenance schedule and the
instructions below for years of safe,
trouble free operation.
• Do not place combustible
materials on or against the
cabinet.
• Do not store gasoline or any
other fl ammable vapors and
liquids in the vicinity of the
unit.
• Annually inspect the physical
support of the unit to ensure that
it is physically sound without
sagging, cracks, gaps, etc.,
around the base so as to provide
a seal between the support and
the base.
• Annually inspect the return-
air connection to ensure that
it is physically sound and is
still sealed to the casing of the
unit.
• Annually inspect the unit and
ductwork for signs of physical
deterioration.
• Always replace the doors on
the unit after servicing. Do not
operate the unit without all doors
and covers in place.
1. Regular Cleaning:
CAUTION:
Do not strike any of the internal
electrical components while
cleaning.
• Remove any debris from the
outdoor coil, being careful not to
damage the aluminum fi ns.
• Check for and remove any
o b s t r u c t i o n s t o c o n d e n s e r
airfl ow.
• Clean the blower compartment
regularly during the heating and
cooling seasons to remove any
dust that may have accumulated
in the compartment or on the
blower and motor. Buildup of
dust on the blower and motor
can create excessive loads on
the motor resulting in higher than
normal operating temperatures
and possible shortened service
life.
2. Air Filters:
WARNING!
Never operate the unit without
a fi lter in the return air system.
Dust and lint in the return air
can build up on the internal
components, resulting in a
loss of effi ciency, equipment
damage, and possible fire
risk.
6, 7½ and 10 ton rooftop package units
are factory equipped with pleated 2”
disposable fi lters. The fi lters should
be checked periodically and replaced
(or cleaned) when necessary with
fi lters of the same dimensional size.
Replace using disposable fi lters with
a minimum airfl ow rating of 500 FPM
or permanent fi lters only. The fi lter rack
is fi eld adjustable to accommodate
1” permanent fi lters.
DO NOT
use 1”
disposable fi lters in these units.
NOTE:
Filters must be ULC approved
or equivalent for use in Canada.
Always replace the fi lter access
panels after changing or cleaning
the fi lters. Do not operate unit
without the fi lter access panels in
place.
3. Motor Lubrication:
WARNING!
Lubrication of the motors in
this unit is not required. Do
not lubricate any motor in this
product.
The motors for the circulating air blower
and outdoor fan are pre-lubricated at
the factory. No further oiling is required
for the life of this product.
