Bitzer Compressor 4N-20.2(Y)

Check operating data as per chapter 5.6

Verify oil supply as per chapter 5.6

Protection Devices and Monitoring Parts

Inspect protection devices and monitoring parts

Electrical and Mechanical Checks

Check electrical cable connections for tight fitting

Verify tightening torques as per KW-100

Ensure the plant is turned off and cooled down

Gather necessary tools and materials

Ensure availability of the following oil types

Drain the old oil from the system

Is this a field installation or near operating limits?

Enter the current operating hours of the plant

Ensure the plant is turned off and cooled down

Avoid air admission into the plant and oil can

Replace the oil with the recommended type from chapter 2

Check and record the oil level in the sight glass

Is the oil level within the acceptable range (¼ to ¾)?

Measure the oil pressure using a gauge connected to the Schrader valves on the oil pump

Is the differential oil pressure within permissible values (1.4 to 3.5 bar)?

Is the inlet pressure (suction side of oil pump) at least 0.4 bar?

Has the differential oil pressure switch cut out?