Airedale SmartCool 11-233kW - Manual (Page 172)

SmartCool
TM
- D Precision Air Conditioning
172
Precision Air Conditioning
Installation, Maintenance and Commissioning Manual :6877419 02/2013
Commissioning procedure
Compressor Oil Level
(Full and part load) Check the compressor oil level at full load. (Record oil level). The oil level should be
checked after 1 hour of operation and must be between 1/3 rd and 2/3 rd.
Circuit 1 Circuit 2
Additional Oil Added Additional oil to refrigeration systems is extremely critical. Too much can be as crucial as
too little.
A compressors oil charge will migrate to other parts of the system and may be unable to
return, depending on pipework design. The velocity of the refrigerant in the pipework may
be reduced causing the oil not to return.
As a guideline around 2% of a system refrigerant charge is required as the oil quantity.
The oil in a system will coat all internal components (pipework and oil traps) making the
need for additional oil in the compressor.
Additional features within the SmartCool can also inhibit oil return to the compressors.
Hot Gas Reheat coils and Suction throttle valves can cause this problem although close
oil management will enable these features to be used correctly.
Poor superheat control (liquid flood back) can also wash oil out of a compressor so the
importance of correct installation / commissioning is paramount.
Record any additional oil added to the system.
Oil Separator Specify whether there Is an oil separator fitted to the unit.
RECORD Don’t forget to record refrigeration charges in your F-Gas record.
C
omm
iss
ion
ing