Never operate your unit without filters in place. Failure to
heed this warning may result in damage to the blower motor
and/or compressor. An accumulation of dust and lint on
internal parts of your unit can cause loss of efficiency and, in
some cases, fire.
FANS AND FAN MOTOR — Periodically check the condition of
fan wheels and housings and fan-motor shaft bearings. No lubri-
cation of condenser- or evaporator-fan bearings or motors is
required or recommended.
EVAPORATOR AND CONDENSER COILS — Cleaning of the
coils should only be done by qualified service personnel. Contact
your dealer for the required annual maintenance.
CONDENSATE DRAIN — The drain pan and condensate drain
line should be checked and cleaned at the same time the cooling
coils are checked by your dealer.
COMPRESSOR — All compressors are factory-shipped with a
normal charge of the correct type refrigeration grade oil in them
and should rarely require additional oil.
CONDENSER FAN
Do not poke sticks, screwdrivers, or any other object into
revolving fan blades. Injury or equipment damage may result.
The fan must be kept free of all obstructions to ensure proper
cooling. Contact your dealer for any required service.
ELECTRICAL CONTROLS AND WIRING — Electrical con-
trols are difficult to check without proper instrumentations; there-
fore, if there are any discrepancies in the operating cycle, contact
your dealer and request service.
REFRIGERANT CIRCUIT — The refrigerant circuit is difficult
to check for leaks without the proper equipment; therefore, if
inadequate cooling is suspected, contact your local dealer for
service.
System under pressure. Relieve pressure and recover all
refrigerant before system repair or final unit disposal to avoid
serious injury or death. Use all service ports and open all
flow-control devices, including solenoid valves.
UNIT PANELS — After performing any maintenance or service
on the unit, be sure all panels are fastened securely in place to
prevent rain from entering unit cabinet and to prevent disruption of
the correct unit airflow pattern.
REGULAR DEALER MAINTENANCE
In addition to the type of routine maintenance you might be willing
to perform, your unit should be inspected regularly by a properly
trained service technician. An inspection (preferably each year, but
at least every other year) should include the following:
1. Inspection and, if required, cleaning of the condenser and
evaporator coils.
2. Inspection and, if required, cleaning of the evaporator drain
pan.
3. Inspection and cleaning of blower wheel housing and motor.
4. Inspection of all supply-air and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems found
should be resolved at this time.
5. Inspection of the unit base to ensure that no cracks, gaps, etc.,
exist which may cause a hazardous condition.
6. Inspection of the unit casing for signs of deterioration.
7. Inspection of all electrical wiring and components to assure
proper connection.
8. Inspection for leaks in the refrigerant circuit. Pressure-check
to determine appropriate refrigerant charge.
9. Inspection of compressor oil level by service person to ensure
proper oil level is maintained in the compressor when it is
installed and running.
10. Operational check of the unit to determine working condi-
tions. Repair or adjustment should be made at this time.
Your servicing dealer may offer an economical service contract
that covers seasonal inspections. Ask for further details.
Complete service instructions can be found in the unit Installation,
Start-Up and Service Instructions.
WARRANTY CERTIFICATE
Unit 50GL has a limited warranty. Be sure to read the warranty
carefully to determine the coverage for your unit.
BEFORE YOU CALL FOR SERVICE, CHECK FOR SEV-
ERAL EASILY-SOLVED PROBLEMS
If insufficient heating or cooling is suspected:
( ) Check for sufficient airflow. Check the air filter for dirt. Check
for blocked return-air or supply-air grilles. Be sure they are open
and unobstructed. If these checks do not reveal the cause, call your
servicing dealer.
If your unit is not operating at all, check the following list for easy
solutions:
( ) Check to be sure that your thermostat temperature selector is set
below the indoor temperature during the cooling season. Be sure
the system switch is in the COOL position and not in the OFF
position.
Fig. 2—Filter Access Panel—Vertical Supply
Shown
ACCESS PANEL
FILTER ACCESS
PANEL*
*For accessory filter rack.
Table 1 — Indoor-Air Filter Data
UNIT SIZE FILTER SIZE
50GL024-030 20x20x1
50GL036 20x24x1
50GL042-060 24x30x1
2
