Name: mycom 280J
Brand: mycom
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2205B0JE-DA-J-N_2014.05.

2 Structure and Specifications of the Compressor

Screw Compressor J-series 2.3 Compressor Specifications

2-6

Figure 2-1 Operation Limits Chart

NOTE1: The pressure values in the operation limit chart are absolute values [MPa (A)].

Operation range

(Pressurized lubrication by oil pump)

Operation range

(Lubrication supplied by differential pressure)

Table of Contents6
Safety11
Observation/Prevention11
Observance (Do's)11
Do's on Operation11
Do's on Maintenance11
Do's on Lockout/Tagout after Shutting off the Power12
Do's about Personal Protective Gear12
Do's about Handling of Hazardous and Toxic Substances12
Do's about Handling Emergency Situation12
Do's about Waste Oil, Fluid, and Materials12
Other Do's13
Prohibition (Don'ts)13
Warnings14
Types and Meanings of Warnings14
Safety Labels14
Residual Risks17
Safety Devices20
Emergency Stop Button20
Compressor Protection Devices21
Structure and Specifications of the Compressor23
Features of the J-Series Screw Compressor23
Model Designation of the Compressor23
Compressor Specifications24
Specifications24
Operation Limits27
Outer Dimensions29
Structure of the Compressor36
Sectional View37
Mechanisms46
Basics of the Screw Compressor46
Suction Process47
Compression Process47
Discharge Process47
Oil Flow48
Capacity Control Characteristics49
Variable VI Control50
Internal Volume Ratio)50
Reasons for Adjusting VI According to Operating Conditions51
Details of Variable VI Mechanism51
Automatic Variable VI Mode51
Fixed VI Mode52
Position Sensor52
Solenoid Valve53
220J-Series53
Explosion Proof for 170J/220J-Series, also 280J-Series55
Installation56
Precautions for Installation56
Installation Work57
Unpacking57
Storage57
Transfer57
Preparation for Installation58
Installation59
Piping60
Equipment and Devices for Protection of the Compressor61
Pressure Test (Leak Test)62
Lubricant(Refrigerant Oil) Charge62
Initial Charge of Lubricant62
Additional Charge of Lubricant Procedure63
Charging of Refrigerant63
Check after Installation63
Documents Related to Installation64
Compressor and Package Operation68
Adjustment before Test Operation68
Adjustment of Unloader Slide Valve and Variable VI Slide Valve68
Lubricant (Refrigerant Oil)69
Precautions for Selecting the Lubricant69
Recommended Lubricant69
Change of Lubricant Brand71
Precautions for Handling Lubricant71
Precautions for Handling Polyalkylene Glycol (PAG)71
Precautions for Handling Polyolester (POE) Oil72
Precautions for Operation73
Prevention of Liquid Return (Liquid Backflow) Operation73
Purging of Non-Condensable Gases73
Action for Stopping the Compressor for Long Period of Time74
Maintenance and Inspection75
Precautions for Maintenance and Inspection75
Maintenance List76
Daily Management76
Periodical Inspection79
Guidelines for Compressor Overhaul Frequency80
Replacement Parts of the Compressor in Overhauling81
Management of Lubricant92
Lubricant Management Standard92
Replacement Interval for Lubricant93
First System Startup93
During Normal Operation93
Disassembly and Assembly of the Compressor94
Tools for Disassembly and Work Place94
Replacement Parts94
Recovering the Refrigerant94
Removing the Compressor95
Removing Oil from Inside the Compressor96
Common Work Items97
Position Sensor99
Common Precautions for Removal/Installation100
Precautions for Removal100
Precautions for Installation100
Seal Cover101
Common Precautions for Removal/Installation103
Precautions for Removal103
Precautions for Installation104
Bearing Cover105
Common Precautions for Removal/Installation106
Precautions for Removal106
Precautions for Installation107
Unloader Indicator/Capacity Control Solenoid Valve108
Precautions for Removal109
Precautions for Installation109
Unloader Cover110
Common Precautions for Removal/Installation112
Precautions for Removal112
Precautions for Installation113
Unloader Cylinder116
Common Precautions for Removal/Installation117
Precautions for Removal117
Precautions for Installation118
Cylinder119
Common Precautions for Removal/Installation121
Precautions for Removal121
Precautions for Installation121
Balance Piston Cover122
Common Precautions for Removal/Installation123
Precautions for Removal123
Precautions for Installation123
Suction Cover124
Common Precautions for Removal/Installation126
Preparation for Suction Adapter Removal126
Precautions for Removal126
Precautions for Installation127
Thrust Bearings128
Precautions for Removal130
Precautions for Installation130
Separation of Suction Cover and Main Rotor Casing132
Common Precautions for Removal/Installation133
Precautions for Removal133
Precautions for Installation133
Suction Cover133
Common Precautions for Removal/Installation134
Precautions for Removal135
Precautions for Installation135
Rotors136
Common Precautions for Removal/Installation137
Precautions for Removal137
Precautions for Installation138
Separation of Bearing Head and Main Rotor Casing139
Precautions for Removal140
Lifting of Bearing Head140
Lifting of Main Rotor Casing140
Precautions for Installation140
Bearing Head141
Common Precautions for Removal/Installation141
Precautions for Removal142
Precautions for Installation142
Suction Adapter (Except for 280J)143
Common Precautions for Removal/Installation144
Precautions for Removal145
Precautions for Installation145
Unloader Slide Valve Guide146
Adjustment of End Clearance147
Inspection for Runout Male Rotor Shaft149
Inspection for Runout of Seal Cover Mount Face (Bearing Cover)149
Troubleshooting150
Related Documents161
Development View and Configuration Table of the Parts161
List of Tightening Torques for Bolts and Nuts183
List of Tools for Disassembly187
Design Modification Notification (Follow-Up)188
Appendix 1193
Tips for Design, Manufacturing, and Installation of the Compressor Package193
Appendix 1.1 Precautions for Design of the Compressor Package193
Appendix 1.2 Tips for Compressor Package Manufacturing198
Appendix 1.3 Tips for Compressor Package Installation198
Contact Information200

mycom 280J User Manual

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mycom 280J Specifications

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Brand	mycom
Model	280J
Category	Air Compressor
Language	English