MAINTENANCE
To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic main- tenance must be performed on this equipment. This cooling unit should be inspected at least once each year by a quali- ®ed service person. To troubleshoot cooling of units, refer to Troubleshooting chart in back of book.
NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.
The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the User's Manual. FAILURE TO HEED THIS WARN-
ING COULD RESULT IN SERIOUS PERSONAL IN- JURY AND POSSIBLE DAMAGE TO THIS EQUIP- MENT.
The minimum maintenance requirements for this equip- ment are as follows:
1.Inspect air ®lter(s) each month. Clean or replace when necessary.
2.Inspect indoor coil, drain pan, and condensate drain each cooling season for cleanliness. Clean when necessary.
3.Inspect blower motor and wheel for cleanliness and check lubrication each cooling season. Clean and lubricate (if required) when necessary. For ®rst heating season, in- spect blower wheel bimonthly to determine proper clean- ing frequency.
4.Check electrical connections for tightness and controls for proper operation each cooling season. Service when necessary.
Failure to follow these warnings could result in serious personal injury:
1.Turn off electrical power to the unit before perform- ing any maintenance or service on the unit.
2.Use extreme caution when removing panels and parts. As with any mechanical equipment, personal injury can result from sharp edges.
3.Never place anything combustible either on, or in con- tact with, the unit.
Air Filter
Never operate the unit without a suitable air ®lter in the
Inspect air ®lter(s) at least once each month and replace
Replace ®lters with the same dimensional size and type as originally provided, when necessary.
Unit Top Removal
NOTE: When performing maintenance or service proce- dures that require removal of the unit top, be sure to
perform all of the routine maintenance procedures that re- quire top removal, including coil inspection and cleaning, and condensate drain pan inspection and cleaning.
Only quali®ed service personnel should perform mainte- nance and service procedures that require unit top removal. Refer to the following top removal procedures:
1.Remove 7 screws on unit top cover surface. (Save all screws.)
2.Remove 4 screws on unit top cover ¯ange. (Save all screws.)
3.Lift top from unit carefully. Set top on edge and make sure that top is supported by unit side that is opposite duct (or plenum) side.
4.Carefully replace and secure unit top to unit, using screws removed in Steps 1 and 2, when maintenance and/or serv- ice procedures are completed.
Evaporator Blower and Motor
NOTE: Motors without oilers are prelubricated. Do not at- tempt to lubricate these motors.
For longer life, operating economy, and continuing effi- ciency, clean accumulated dirt and grease from the blower wheel and motor annually.
Lubricate the motor every 5 years if the motor is used in- termittently (thermostat FAN switch in AUTO. position), or every 2 years if the motor is used continuously (thermostat FAN switch in ON position).
Disconnect and tag electrical power to the unit before cleaning and lubricating the blower motor and wheel. Failure to adhere to this warning could cause personal injury or death.
To clean and lubricate the blower motor and wheel:
1.Remove and disassemble blower assembly as follows:
a.Remove blower access door.
b.For standard
c.Remove blower assembly from all units. Be careful not to tear insulation in blower compartment.
d.Ensure proper reassembly by marking blower wheel and motor in relation to blower housing before disassembly.
e.Loosen setscrew(s) which secure wheel to motor shaft. Remove screws that secure motor mount brackets to housing and slide motor and motor mount out of housing.
2.Lubricate motor as follows:
a.Thoroughly clean all accumulations of dirt or grease from motor housing.
b.Remove dust caps or plugs from oil ports located at each end of motor.
c.Use a good grade of SAE 20 nondetergent motor oil and put one teaspoon (1¤16 oz. or 16 to 25 drops) in each oil port.
d.Allow time for oil to be absorbed by each bearing, then wipe excess oil from motor housing.
e.Replace dust caps or plugs in oil ports.
3.Remove and clean blower wheel as follows:
a.Ensure proper reassembly by marking wheel orienta- tion and cutoff plate location.
b.Remove screws holding
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