FORM
MAINTENANCE / SERVICE
DISCONNECT AND LOCK OUT
POWER WHEN SERVICING UNIT.
FAILURE TO DO SO MAY RESULT IN
PERSONAL IN-JURY OR DEATH
DUE TO ELECTRICAL SHOCK.
Exercise care when working around the sharp metal edges of door panels or door frames, etc. These edges can cause injury.
EVAPORATOR COIL
Inspect the evaporator coil at filter change intervals. Dirty or clogged evaporator coils causes low suction pressure and lost capacity. If the coils appear dirty, they should be cleaned using a mild detergent or a commercial coil cleaning agent.
REFRIGERANT CIRCUIT(S)-
The Air Conditioning section of this equipment is charged with
With the unit operating, check and record the compressor discharge and suction pressures. The compressor running current should also be recorded. A maintenance log of these readings can indicate if the unit is operating within its normal limits. Abnormal readings should be investigated, and the Cause corrected.
BLOWER -
Inspect the evaporator blower at each regular service interval. Clean blower wheel as needed. Bearings are permanently sealed ball type, and do not require lubrication. Check bearings for any signs of wear (movement between inner and outer races). Ensure bearing locking collars are secure to the shaft, and that collar locking screw is properly set. Check that the blower wheel is tight on the shaft, and that the hub
set screws are properly torqued.
DRIVE BELT -
Examine belt periodically for wear. Glazed areas on the drive surfaces indicate overheating due to belt slippage. Ideal tension is the lowest tension at which the belt will not slip under peak load conditions. Over- tensioning shortens belt and bearing life (see section ‘Blower Speed Adjustment’).
The tension on the belt should be adjusted for a deflection of 1/64 of an inch per inch of belt span, with the appropriate force applied at the midpoint of the span (see section ‘Blower Speed Adjustment’). Tension “New” belts at the maximum value indicated. Used belts should be maintained at the minimum value.
FILTERS -
Inspect filters monthly and replace as necessary. Use UL Class 2 rated filters. Factory supplied filters are medium efficiency, extended surface pleated type. Replacements should be of the same type, to maintain optimum airflow performance. Filter sizes are as follows:
Filters | Qty/Size |
CSV060B 2/20x16x2
CSV096B 6/14x20x2
CSV120B 6/14x20x2
CSV180B 2/16x20x2 4/16x25x2
CSV240B 6/20x25x2
26 | JOHNSON CONTROLS |
