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COMPRESSORS
The scroll compressor used in this product is specifically
designed to operate with R-410A Refrigerant and cannot be
interchanged.
This system uses R-410A Refrigerant which oper-
ates at higher pressures than R-22. No other
refrigerant may be used in this system.
The compressor also uses a polyolester (POE oil), Mobil 3MA
POE. This oil is extremely hygroscopic, meaning it absorbs
water readily. POE oil can absorb 15 times as much water as
other oils designed for HCFC and CFC refrigerants. Take all
necessary precautions to avoid exposure of the oil to the
atmosphere.
Do not leave the system open to the atmosphere.
Unit damage could occur due to moisture being
absorbed by the POE oil in the system. This type
of oil is highly susceptible to moisture absorption
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
8
Exposure, even if immediately cleaned up, may
cause embrittlement (leading to cracking) to occur
in one year or more. When performing any service
that may risk exposure of compressor oil to the
roof, take precautions to protect roofing.
Procedures which risk oil leakage include, but are not limited
to, compressor replacement, repairing refrigerant leaks,
replacing refrigerant components such as filter drier, pressure
switch, metering device or coil.
Units are shipped with compressor mountings which are
factory-adjusted and ready for operation.
Do not loosen compressor mounting bolts.
PHASING
Three-phase, scroll compressors operate in only one direc-
tion. If the scroll is drawing low amperage, has similar suction
and discharge pressures, or is producing a high noise level,
the scroll is misphased. Change the incoming line connection
phasing to obtain the proper rotation.
Scroll compressors require proper rotation to oper-
ate properly. Failure to check and correct rotation
may result in property damage.
66433-YIM-B-1004
Unitary Products Group
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