KIRLOSKAR CHILLERS PRIVATE LIMITED
A Kirloskar Group Company IOM-KAC-ENG - Page 20
Compressor Oil
Oil levels in the oil equalizing line sight glass should be between the bottom and the middle of
the sight glass with the system OFF. High oil levels may cause excessive oil carryover in the
system. High oil concentration in the system may cause nuisance trips resulting from incorrect
readings on the level sensor and temperature sensors. Temperature sensor errors may result in
poor liquid control and resultant liquid overfeed and subsequent damage to the compressor.
While running, a visible sign of oil splashing in the sight glass is normal.
Oil sight glass
Higher capacity scroll compressors come equipped with a sight glass which may be used to
determine the amount and condition of the oil contained within the sump.
Compressor Heaters
If power is OFF more than two hours, the crankcase heaters must be energized for 18 – 24 hours
prior to restarting a compressor. This will assure that liquid slugging and oil dilution does not
damage the compressors on start
3.3.2. Air Cooled Condenser
All KAC units are equipped with compactly packed air-cooled condensers. These air-cooled
condensers are manufactured with the latest technology 9.53mm (3/8”) O.D internally enhanced
seamless copper tubes and super-slit aluminum fins. The copper tubes are precisely expanded
and brazed to the corresponding headers. These condensers are provided with the separate sub-
cooler circuit to get positive liquid subcooling of condensed high pressure liquid refrigerant.
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