ClimaCool UCA Manual - Manual (Page 31)

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Oil Levels
The oil level in the compressor should be checked with the
compressor running. The compressor oil level may vary
during operation and particularly on the startup. 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 refrigerant 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 (up to 6 hours of operation)
should be given to allow the oil to return before more oil is
added. The compressor should not be allowed to operate
with less than 1/8” oil sight glass for longer than 4-6 hours.
Adding Oil
The compressor must never be run in 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.
Compressor Information
Highly effi cient and extremely reliable scroll compressors
are used on Model UCA. The information contained in this
manual 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 loud 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 polyolester type oil, (POE), and is intended for R-410A
refrigerant 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
• Mobile EAL Arctic 22 CC
• ICI Emkarate RL 32 CF
ATTENTION INSTALLER
3 Phase Scroll Compressor Units
•If this unit uses a 3 Phase Scroll Compressor, the following
instructions MUST BE followed:
- Unit power supply MUST BE wired in the proper sequence to
avoid damage to the 3 Phase Scroll Compressor.
- Scroll Compressors with INCORRECT rotation show the
following characteristics:
1.) High sound level;
2.) High suction pressure and low discharge pressure;
3.) Low current draw.
- If any of the three above characteristics exist, swap two of the
three supply wires at the discount and recheck compressor for
incorrect rotation.
WARNING
To avoid the release of refrigerant into the atmosphere,
the refrigerant circuit of this unit must be serviced only by
technicians who meet local, state and federal profi ciency
requirements.
All refrigerant discharged from this unit must be recovered
WITHOUT EXCEPTION. Technicians must follow industry
accepted guidelines and all local, state and federal statutes for
the recovery and disposal of refrigerants.
If a compressor is removed from this unit, system refrigerant
circuit oil will remain in the compressor. To avoid leakage of
compressor oil, the refrigerant lines of the compressor must
be sealed after it is removed.