15
APPROVED HERMETIC COMPRESSOR OILS
Hermetic compressors are charged with optimum oil that will be adequate for close- coupled
systems designed in accordance with good engineering practice.
Some System designs containing unusual evaporators or extensive interconnecting
pipes,may require additional oil. However, since excess oil can also damage compressors,
care should be taken not to exceed the oil charge amounts specified. For more detail contact
Tecumseh sales representative.
REFRIGERANT
APPROVED COMPRESSOR OILS
R404A
R22
Mineral Oil
Polyol Ester (POE)
SYSTEM START-UP PROCEDURE
Check the electrical connections if they are properly attached and secured.
Check the electrical supply versus nameplate specifications.
Check if the Voltage deviation is within the specified range.
Check all mechanical and electrical connections if they are properly tightened and secured.
Compressor mounting parts, fan motor mounting screws, fan blade tightening screw, shroud
electrical boxes etc.
Check that the safety and pressure controls are connected and set correctly.
Check that the suction and liquid Service valves are connected properly.
Check by isolating the compressor motor if the control circuit including thermostat and
solenoid valve (if used) is wired and operates correctly.
Confirm that the system has been properly leak tested, evacuated and charged. If the system
has been previously charged then make sure that the crank case heater is turned on at least
24 hours prior to start up, otherwise warm up the compressor bottom shell to assure that the
refrigerant will not cause damage to the compressor due to the slugging condition. Do not
attempt to warm up the compressor by applying a flame to the crankcase.
Turn on the electrical power to the condensing unit and unit cooler(s) or freezer(s).
The compressor will start when the low-pressure control closes.
Always re-assemble the enclosure panels when start-up job is completed. Make sure all
panels are secure and panel screws are properly tightened
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