Maintenance
Refrigeration
Service Tools/Test Equipment
• Refrigerant Manifold gauges
• Spanners
• Voltmeter
Safety Equipment
• Safety Glasses / Goggles
• Gloves
• Overalls
Procedures
HP/LP Safety Pressure Switch Settings
Check operating of HP / LP cut-out,
Settings
LP cut-out – (Auto reset for 3 times when the Low Pressure is detected over a period of 1 hour)
Has a 2 minute delay on start-up (similar to a Low ambient kit)
Low pressure cut-out 0.5 +/- 0.2 Barg
HP switch (manual reset): High pressure switch 40.25 bar +/- 1 Barg
HP limiting function 35 barg / 2 barg differential (this reduces the number of compressors operating i.e. 2 comp and
down to 1 comp.
Compressor Oil Level (Full load)
Check the compressor oil level at full load. (record oil level)
Refrigeration
Task Frequency
Compare the following and compare results with commissioning records:
3 Months 12 Months 60 Months
Suction, Liquid and Discharge pressures ●
Refrigeration system temperatures, Suction, Liquid and Discharge. Record
superheat and subcooling temperatures
●
Check each circuit sight glass for dryness and bubbles for indication of leaks ●
Head pressure control is maintained ●
Record details on F-Gas record ●
Check compressor oil level ●
Pressure relief valves ●
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