Fig. 44 — Separating Coil Sections
Lubrication
COMPRESSORS — Each compressor is charged with the correct amount of oil at the factory.
FAN MOTOR BEARINGS — Fan motor bearings are of the permanently lubricated type. No further lubrication is required. No lubrication of condenser or evaporator fan motors is required.
Manual
Economizer Adjustment — Refer to Optional Econo-
mizer sections on page 12 and 14.
Refrigerant Charge — Amount of refrigerant charge is listed on unit nameplate (also refer to Table 1). Refer to Carrier
Unit panels must be in place when unit is operating during charging procedure.
NO CHARGE — Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refriger- ant. (Refer to Table 1.)
TO USE COOLING CHARGING CHART — Take the out- door ambient temperature and read the suction pressure gage. Refer to chart to determine what suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted.
EXAMPLE: (Fig. 48)
Outdoor Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 F Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 psig Suction Temperature should be . . . . . . . . . . . . . . . . . . . . . 76 F (Suction Temperature may vary 5 F.)
Flue Gas Passageways — To inspect the flue collec- tor box and upper areas of the heat exchanger:
1.Remove the combustion blower wheel and motor assem- bly according to directions in
2.Remove the flue cover to inspect the heat exchanger.
3.Clean all surfaces as required using a wire brush.
Fig. 45 — Condenser-Fan Adjustment
39