mycom J Series

2205B0JE-DA-J-N_2014.05.
Table of Contents
Screw Compressor J-series
vii
4.2.4.2 Precautions for Handling Polyolester (POE) Oil .......................................... 4-5
4.3 Precautions for Operation ........................................................................... 4-6
4.3.1 Prevention of Liquid Return (Liquid Backflow) Operation................................. 4-6
4.3.2 Purging of Non-condensable Gases................................................................. 4-6
4.4 Action for Stopping the Compressor for Long Period of Time ............... 4-7
5 Maintenance and Inspection
5.1 Precautions for Maintenance and Inspection ............................................ 5-1
5.2 Maintenance List .......................................................................................... 5-2
5.2.1 Daily Management ............................................................................................ 5-2
5.2.2 Periodical Inspection......................................................................................... 5-5
5.2.3 Guidelines for Compressor Overhaul Frequency ............................................. 5-6
5.2.4 Replacement Parts of the Compressor in Overhauling .................................... 5-7
5.3 Management of Lubricant ......................................................................... 5-18
5.3.1 Lubricant Management Standard ................................................................... 5-18
5.3.2 Replacement Interval for Lubricant ................................................................. 5-19
5.3.2.1 First system startup ................................................................................... 5-19
5.3.2.2 During normal operation ............................................................................ 5-19
5.4 Disassembly and Assembly of the Compressor ..................................... 5-20
5.4.1 Tools for Disassembly and Work Place .......................................................... 5-20
5.4.2 Replacement Parts ......................................................................................... 5-20
5.4.3 Recovering the Refrigerant ............................................................................. 5-20
5.4.4 Removing the Compressor ............................................................................. 5-21
5.4.5 Removing Oil from Inside the Compressor .................................................... 5-22
5.4.6 Common Work Items ...................................................................................... 5-23
5.4.7 Vi Position Sensor .......................................................................................... 5-25
5.4.7.1 Common Precautions for Removal/Installation ......................................... 5-26
5.4.7.2 Precautions for Removal ........................................................................... 5-26
5.4.7.3 Precautions for Installation ........................................................................ 5-26
5.4.8 Seal Cover ...................................................................................................... 5-27
5.4.8.1 Common Precautions for Removal/Installation ......................................... 5-29
5.4.8.2 Precautions for Removal ........................................................................... 5-29
5.4.8.3 Precautions for Installation ........................................................................ 5-30
5.4.9 Bearing Cover ................................................................................................. 5-31
5.4.9.1 Common Precautions for Removal/Installation ......................................... 5-32
5.4.9.2 Precautions for Removal ........................................................................... 5-32
5.4.9.3 Precautions for Installation ........................................................................ 5-33
5.4.10 Unloader Indicator/Capacity Control Solenoid Valve ..................................... 5-34
5.4.10.1 Precautions for Removal ........................................................................... 5-35
5.4.10.2 Precautions for Installation ........................................................................ 5-35
5.4.11 Unloader Cover ............................................................................................... 5-36
5.4.11.1 Common Precautions for Removal/Installation ......................................... 5-38
5.4.11.2 Precautions for Removal ........................................................................... 5-38
5.4.11.3 Precautions for Installation ........................................................................ 5-39
5.4.12 Unloader Cylinder ........................................................................................... 5-42
5.4.12.1 Common Precautions for Removal/Installation ......................................... 5-43
5.4.12.2 Precautions for Removal ........................................................................... 5-43