Lubrication
COMPRESSORS — Each compressor is charged with the correct amount of oil at the factory. The correct oil charge is shown in Tables 1A and 1B. If oil is visible in the compressor sight glass, check unit for operating readiness as described in
If oil charge is above 1/3 sight glass, do not remove any oil until the compressor crankcase heater has been energized for at least 24 hours with compressor off.
When additional oil or a complete charge is required, use only
Petroleum Specialties, Inc. . . . . . . . . . . . . . . . . . . . . . Cryol 150 Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Capella
IMPORTANT: Do not use reclaimed oil or oil that has been exposed to the atmosphere. Refer to Carrier Standard Service Techniques Manual, Chapter 1, Refrigerants sec- tion, for procedures to add or remove oil.
FAN SHAFT BEARINGS — Lubricate bearings at least ev- ery 6 months with suitable bearing grease. Do not over grease. Typical lubricants are given below:
MANUFACTURER | LUBRICANT |
Texaco | Regal |
Mobil | Mobilplex EP No. 1 |
Sunoco | Prestige 42 |
Texaco | Multifak 2 |
*Preferred lubricant because it contains rust and oxidation inhibitors.
CONDENSER- AND
Evaporator Fan Performance Adjustment (Fig. 67) — Fan motor pulleys are designed for speed shown in Tables 1A and 1B (factory speed setting).
IMPORTANT: Check to ensure that the unit drive matches the duct static pressure using Tables
To change fan speeds, change pulleys.
To align fan and motor pulleys:
1.Shut off unit power supply.
2.Loosen fan shaft pulley bushing.
3.Slide fan pulley along fan shaft.
4.Make angular alignment by loosening motor from mounting plate.
CENTER DRIVE
SHAFT
5.Retighten pulley.
6.Return power to the unit.
Fig. 67 — Evaporator-Fan Alignment
and Adjustment
Evaporator Fan Coupling Assembly — If the cou- pling has been removed for other blower assembly component repair or replacement, it is critical that the coupling be reassem- bled and aligned correctly to prevent premature failures.
REASSEMBLING THE COUPLING INTO THE UNIT (Fig. 68)
1.Prior to reassembling the coupling, loosen the 4 bearing mounting bolts, which secure the 2 bearings on either side of the coupling. Remove the drive belts.
2.Reassemble the coupling with the bearings loose. This al- lows the coupling to find its own
3.Check the
4.Check the key for
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Fig. 68 — Evaporator Fan Coupling
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