Nibe CLIMACOOL UCR 30, Installation, Operation & Maintenance Manual

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Model UCR uses scroll compressors which are highly
efficient and extremely reliable. 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 load operating
noise together with a lack of compression .
Compressor Anti-Short Cycle Timer
Built into the logic of the CoolLogic Control System is an anti-
short cycle timer which will prevent the compressors from
restarting immediately following a compressor shutdown .
Minimum on 75 seconds and minimum off 200 seconds.
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 scroll compressors will be either polyolester type
oil (POE) or polyvinyl-ether type oil (PVE) . Both 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 both oils from sealed
metal cans . Note: Refer to compressor name plate for
proper oil type. Different oils cannot be mixed.
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 should be given to allow the oil
to return before more oil is added . This could take up to six
hours of operation . The compressor should not be allowed
to operate with less than 1/ 8 of the sight glass for longer than
four to six hours .
Adding Oil
The compressor must never be ran in a vacuum . A suitable
hydraulic pump should be used to add oil and reserved
for this process . It is imperative that oil type be verified
prior to adding to a compressor. 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
CAUTION/ATTENTION
3 PHASE SCROLL
COMPRESSOR UNIT
UNITÉ COMPRESSEUR
SCROLL 3-PHASE
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:
- High sound level;
- High suction pressure and low
discharge pressure;
- Low current draw.
• If any of the three above
characteristsics exist, swap
two of the three supply wires
at the disconnect and recheck
compressor for incorrect rotation.
Si cet appareil utilise compresseur
scroll 3-Phase, les instructions
suivantes doivent être suivies:
• L’alimentation de l’appareil doit
être monté dans l’ordre correct
pour éviter endommager le
compresseur scroll 3-Phase;
• Compressuers scroll avec
rotation incorrecte montrent les
caractéristiques suivantes:
- Haut niveau de son;
- Pression d-aspiration élevée
et une faible pression de
décharge;
- Faible ampérage.
• Si l’un des trois éléments
mentionnés ci-dessus sont
remplies, échanger deux des trois
lignes électriques alimen tant la
interrupteur de sécurité et vérifier
la rotation du compresseur.
ATTENTION
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
proficiency requirements.
All refrigerant discharged from this unit must be recovered WITHOUT
EXCEPTION. Technicians must follow industry accepted guidelines and all
local, state and federal statues for the recovery and disposal of refrigerants.
If a compressor is removed from the 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.