Preparations before start-up....................................................................................................................61
Starting and stopping......................................................................................................................... 61
Initial start-up procedure..........................................................................................................................61
Motorised oil injection valve.....................................................................................................................62
Correct setting at first start-up.................................................................................................................62
Method selection........................................................................................................................................62
Initial start-up guidelines..........................................................................................................................63
Normal start-up procedure.......................................................................................................................63
Restarting the compressor unit after control power interruption, plant power failure................... 63
Stopping routine........................................................................................................................................ 63
Shut down for long periods...................................................................................................................... 63
Long term storage..................................................................................................................................... 64
Secondary system.......................................................................................................................................... 65
General information............................................................................................................................65
Guidelines for the control of secondary sides................................................................................. 65
Off condition operation.............................................................................................................................65
Cleaning in place..................................................................................................................................65
Temperature and flow control........................................................................................................... 66
Water and brine treatment................................................................................................................ 66
R717 detector....................................................................................................................................... 66
Troubleshooting............................................................................................................................................. 67
Refrigeration plant, general issues................................................................................................... 67
Compressor unit, general issues....................................................................................................... 67
Compressor unit - oil separation.......................................................................................................69
Compressor block................................................................................................................................69
Demand oil pump system, optional.................................................................................................. 70
Maintenance instructions............................................................................................................................. 71
Maintenance of compressor unit...................................................................................................... 71
Daily maintenance, perform a minimum of twice a week.................................................................... 71
Periodic maintenance................................................................................................................................71
Major overhaul........................................................................................................................................... 71
Monitoring of operation..................................................................................................................... 73
Checklist...................................................................................................................................................... 73
Oil...........................................................................................................................................................74
Oil change.............................................................................................................................................74
Oil charge....................................................................................................................................................75
Charging the compressor with lubricating oil................................................................................. 75
Sampling the oil................................................................................................................................... 78
Motor.....................................................................................................................................................79
Motor lubrication....................................................................................................................................... 79
Replacing the motor bearings..................................................................................................................79
Final disposal.................................................................................................................................................. 80
5SAB 193-233-283 OHU 09135, OHU 10737, and OHU 07633 HP (including ATEX) Screw Compressor Units