SABROE SAB 283

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2 SAB 283-355 A-Frame OHU 6042 and OHU 7650 (including ATEX) Screw Compressor Unit

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Table of Contents3
Manual for SAB 283 and 355 Screw Compressors7
Introduction to Operating Manual9
Compressor Name, SABROE and Frick10
Amendments to the Manual11
Safety Precaution Definitions Used in this Manual13
Requirements for Competent Persons13
Areas of Application of the Screw Compressor14
Application of the Screw Compressor14
Application of Combustion Engines14
Identification16
Unit and Pipe Name Plate16
Compressor Name Plate20
Compressor Name Plate - ATEX22
Labelling of Explosion-Proof Equipment23
Atex23
Geometrical Swept Volume24
Vessel Name Plate24
Safety Precautions27
Signs27
General28
During Operation28
Ventilation29
Rotating Parts29
Vibration and Noise29
Pressure29
Cooling Water System29
Safety During Maintenance and Service29
Atex30
Electrical Installations30
Power Supply31
Lubricating Oils31
Refrigerants31
Purging a Refrigeration Plant32
F-Gas Regulation (Fluorinated Greenhouse Gases)32
Bans on GWP33
Labelling33
Leakage Test33
Recovery of Refrigerant33
Certification of Personnel33
Record Keeping33
Sound and Noise Data34
Noise Data34
Noise Data for SAB 283 and SAB 35534
Installation35
Atex36
Operating Instructions37
Description of the Unit37
Control System37
Principle Drawing37
General P&I Diagram40
P&I Diagram - Liquid Injection43
Valve Positions During Operation44
Descriptions of Main Components and Systems45
Compressor45
Compressor Lubrication System46
No Pump Oil System47
Demand Pump Oil System47
Compressor Oil Separation System47
Automatic Oil Return Valve48
Function48
Cold-Start System49
High-Stage Units50
Booster Applications50
Compressor Hydraulic System51
Single-Acting Mode, High-Stage (> 10 Bar Pressure Differential)52
High-Stage Compressor Loading52
High-Stage Compressor Unloading52
Double-Acting Mode, Booster (< 10 Bar Pressure Differential)52
Booster Compressor Loading53
Booster Compressor Unloading53
Volumizer Volume Ratio (VI) Control53
Compressor VI Increase53
Compressor VI Decrease54
Compressor Oil Cooling Systems54
Liquid Injection54
Suction Check Valve By-Pass54
Balance Piston Pressure Regulator55
Low Ambient Temperature Operation57
Heating Element57
Atex57
Start-Up57
Preparations before Start-Up57
Initial Start-Up Procedure58
Motorised Oil Injection Valve58
Correct Setting at First Start-Up58
Method Selection59
Initial Start-Up Guidelines59
Normal Start-Up Procedure60
Restarting the Compressor Unit after Control Power Interruption, Plant Power Failure60
Stopping Routine60
Brief Stop60
Shut down for Long Periods60
Long Term Storage60
Secondary System61
General Information61
Guidelines for the Control of Secondary Sides61
Off Condition Operation61
Cleaning in Place61
Temperature and Flow Control62
Water and Brine Treatment62
R717 Detector62
Troubleshooting63
Refrigeration Plant, General Issues63
Compressor Unit, General Issues63
Compressor Unit - Oil Separation65
Compressor Block65
Demand Oil Pump System, Optional66
Maintenance Instructions67
Maintenance of Compressor Unit67
Daily Maintenance, Perform a Minimum of Twice a Week67
Periodic Maintenance67
Major Overhaul67
Monitoring of Operation69
Checklist69
Oil71
Oil Change71
Charging the Compressor with Lubricating Oil71
Sampling the Oil73
Motor75
Motor Lubrication75
Replacing the Motor Bearings75
Final Disposal76
Safety Precautions76
Waste Disposal76

SABROE SAB 283 - Page 2

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