SB-600-2
32
7
Operation
7.1
Regular checks
Examine the ACP at regular intervals according to na-
tional regulations.
Check the operating data:
• System control / alarm messages
• Evaporation temperature
• Suction gas temperature
• Condensing temperature
• Discharge gas temperature
• Oil temperature
• Cycling rate
• Current consumption of the compressor
Prepare data protocol.
Also check the following points and perform mainten-
ance work if needed:
• Noises and vibrations
• Oil and/or refrigerant leakage (ammonia odour)
• Oil level in the oil separator and in the collecting ves-
sel of the shaft seal
• Refrigerant level (level in the liquid sight glass)
• Safety-relevant components (pressure limiter, safety
valves, safety and protection devices, etc.)
• Electrical cable connections (check if they are mech-
anically secured)
• Calibration of the sensors
Please refer to the Operating Instructions for the com-
pressor and the pressure vessel for information about
oil change and further maintenance works.
8
Maintenance
To guarantee a reliable operation of the ACP, you must
observe the following maintenance intervals.
The maintenance works must only be performed by
qualified and authorized staff.
Maintenance work
Maintenance interval in operating hours
Oil change
5,000 or once a year
Replace the oil filters of the system
10,000
Replace the oil filters of the compressors
10,000
Replace the coalescence filter
30,000
Replace the suction filter
10,000
Replace the filters in the liquid and oil lines
10,000
Replace the elastomer elements of the coupling
If the rotation angle play is bigger than 4 mm
Replace the shaft seal of the compressors
40,000 or if the leakage exceeds 0,8 ml/h
Replace the pressure relief valve of the compressors
100,000
Replace the integrated check valve
40,000
Replace the oil flow switch
100,000
Replace the roller bearings of the compressors
40,000
Replace the external safety valves
After 5 years
Tab. 4: Maintenance intervals
