Initial start-up procedure................................................................................................................... 58
Motorised oil injection valve.....................................................................................................................58
Correct setting at first start-up.................................................................................................................58
Method selection........................................................................................................................................59
Initial start-up guidelines..........................................................................................................................59
Normal start-up procedure.......................................................................................................................60
Restarting the compressor unit after control power interruption, plant power failure................... 60
Stopping routine..................................................................................................................................60
Brief stop.....................................................................................................................................................60
Shut down for long periods...................................................................................................................... 60
Long term storage...............................................................................................................................60
Secondary system.......................................................................................................................................... 61
General information............................................................................................................................61
Guidelines for the control of secondary sides................................................................................. 61
Off condition operation.............................................................................................................................61
Cleaning in place..................................................................................................................................61
Temperature and flow control........................................................................................................... 62
Water and brine treatment................................................................................................................ 62
R717 detector....................................................................................................................................... 62
Troubleshooting............................................................................................................................................. 63
Refrigeration plant, general issues................................................................................................... 63
Compressor unit, general issues....................................................................................................... 63
Compressor unit - oil separation.......................................................................................................65
Compressor block................................................................................................................................65
Demand oil pump system, optional.................................................................................................. 66
Maintenance instructions............................................................................................................................. 67
Maintenance of compressor unit...................................................................................................... 67
Daily maintenance, perform a minimum of twice a week.................................................................... 67
Periodic maintenance................................................................................................................................67
Major overhaul........................................................................................................................................... 67
Monitoring of operation..................................................................................................................... 69
Checklist...................................................................................................................................................... 69
Oil..................................................................................................................................................................... 71
Oil change.............................................................................................................................................71
Charging the compressor with lubricating oil................................................................................. 71
Sampling the oil................................................................................................................................... 73
Motor.....................................................................................................................................................75
Motor lubrication....................................................................................................................................... 75
Replacing the motor bearings..................................................................................................................75
Final disposal.................................................................................................................................................. 76
Safety precautions...............................................................................................................................76
Waste disposal..................................................................................................................................... 76
5SAB 283-355 A-Frame OHU 6042 and OHU 7650 (including ATEX) Screw Compressor Unit
