ClimaCool IOM AR2 SERIES - Manual (Page 53)

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COMPRESSOR INFORMATION
The compressors used on the ClimaCool chiller are either scroll or
reciprocating compressors . They are highly efficient and extremely
reliable . However, the information contained in this document will be
useful for their care .
Compressor Rotation
All scroll-type machines are unidirectional and will only compress
in one direction . Operating in the reverse rotation can be destructive
and will be indicated by a load operating noise together with a lack of
compression .
Compressor Lubrication
The compressor operates on a sealed system and oil can only be lost
if leak occurs . There are few cases when oil will need to be added to a
machine in normal operation .
Oil Type
The oil in ALL scroll compressors used in ClimaCool chillers is
polyester type oil, (POE), and is intended for the dual usage of either
refrigerant R-22 or R 407C selected for use . All (POE) refrigerant oils
require special handling and should be protected from contamination .
They are extremely hygroscopic and will absorb moisture rapidly
from the air . It is strongly recommended to store and dispense POE
oils from sealed metal cans . Suitable POE oils are:
• Copeland Ultra 22 CC
• Mobil EAL Arctic 22 CC
• ICI Emkarate RL 32 CF
Oil Levels
Compressor Information
The oil level in the compressor should be checked with the
compressor running . The compressor oil level may vary during
operation and particularly on start-up . The normal operating
compressor oil level should be between 1/3 and 1/2 of the sight
glass . During operation, a certain amount of oil is carried out into the
refrigeration system . The system has been designed to bring the oil
back to the compressor . If the level in the sight glass falls, it may be
due to the operating conditions and enough time should be given to
allow the oil to return before more oil is added . This could take up
to 6 hours of operation . The compressor should not be allowed to
operate with less than 1/8” oil sight glass for an extended period of
time (longer than 4-6 hours) .
Adding Oil
The compressor must never be run on a vacuum . A suitable hydraulic
pump should be used to add oil and reserved for this process . Oil
should only be added to a compressor while it is operating to observe
valid oil sight glass levels . Oil is pressure-injected either into a gauge
connection on the suction line or injected into the oil process port at
the bottom of the compressor housing . Only enough oil should be
added to raise the level above the 1/3 sight glass point .