mycom 170JL-V, Operation Manual

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2202B0JE-DA-J-N_2012.01.
Table of Contents
Screw Compressor J-series
xi
Table of Contents
1 Safety
1.1 Observation/Prevention .............................................................................. 1-1
1.1.1 Observance (Do's)............................................................................................ 1-1
1.1.1.1 Do's on Operation........................................................................................ 1-1
1.1.1.2 Do's on Maintenance................................................................................... 1-1
1.1.1.3 Do's on Lockout/Tagout after Shutting off the Power .................................. 1-1
1.1.1.4 Do's about Personal Protective Devices ..................................................... 1-2
1.1.1.5 Strict Do's about Handling of Hazardous and Toxic Substances ................ 1-2
1.1.1.6 Strict Do's about Handling Emergency Situation......................................... 1-2
1.1.1.7 Strict Do's about Waste Oil, Fluid, and Materials ........................................ 1-2
1.1.1.8 Other
Strict Do's........................................................................................... 1-2
1.1.2 Prohibition (Don'ts) ........................................................................................... 1-3
1.2 Warnings....................................................................................................... 1-4
1.2.1 Types and Meanings of Warnings .................................................................... 1-4
1.2.2 Safety labels ..................................................................................................... 1-4
1.3 Remaining Hazard........................................................................................ 1-7
1.4 Safety Devices.............................................................................................. 1-9
1.4.1 Emergency Stop Button.................................................................................... 1-9
1.4.2 Breakers of Motor Main Power and Control Power
(Use of Lockout/Tagout Devices) ..................................................................... 1-9
1.4.3 Compressor Protection Devices ..................................................................... 1-10
1.5 Example of Material Safety Data Sheet (MSDS) ...................................... 1-12
2 Structure and Specifications of the Compressor
2.1 Features of the J-Series Screw Compressor............................................. 2-1
2.2 Compressor Specifications ........................................................................ 2-2
2.2.1 Specifications.................................................................................................... 2-2
2.2.2 Outer Dimensions ............................................................................................. 2-5
2.3 Operation Limits ........................................................................................ 2-13
2.4 Structure of the Compressor .................................................................... 2-14
2.4.1 Sectional View ................................................................................................ 2-14
2.5 Mechanisms ............................................................................................... 2-20
2.5.1 Basics of the Screw Compressor ................................................................... 2-20
2.5.2 Suction Process.............................................................................................. 2-21
2.5.3 Compression Process .................................................................................... 2-21
2.5.4 Discharge Process.......................................................................................... 2-21
2.6 Oil Flow ....................................................................................................... 2-22
2.7 Capacity Control Characteristics ............................................................. 2-23
2.8 Variable Vi Control ..................................................................................... 2-24
2.8.1 Vi (Internal Volume Ratio) .............................................................................. 2-24
2.8.2 Reasons for Adjusting Vi According to Operating Conditions ........................ 2-25
2.8.3 Details of Variable Vi Mechanism................................................................... 2-25
2.8.3.1 Automatic Variable Vi Mode ...................................................................... 2-25