2202MYJE-MY-C8-N_2018.02.
Table of Contents
Compound 2-stage Screw Compressor 3225**C
vii
4.2 Precautions for Operation ........................................................................... 4-7
4.2.1 Prevention of Liquid Flow-back Operation ........................................................... 4-7
4.2.2 Purging of Non-Condensable Gases ................................................................... 4-7
4.3 When Stopping the Compressor for a Long Time .................................... 4-8
Chapter 5 Maintenance and Inspection
5.1 Precautions for Maintenance and Inspection ............................................ 5-1
5.2 Maintenance and Inspection List................................................................ 5-3
5.2.1 Daily Management ............................................................................................... 5-3
5.2.2 Periodic Inspection .............................................................................................. 5-5
5.2.3 Guidelines for the Timing of Compressor Overhaul ............................................ 5-6
5.3 Compressor Disassembly Preparation ...................................................... 5-7
5.3.1 Disassembly Tools and Workplace ..................................................................... 5-7
5.3.2 Replacement Parts .............................................................................................. 5-8
5.3.3 Refrigerant Gas Recovery ................................................................................. 5-11
5.3.4 Removal of Connections to the Unit .................................................................. 5-12
5.3.5 Removal and Lifting the Compressor ................................................................ 5-13
5.3.6 Draining Oil from the Compressor ..................................................................... 5-13
5.4 Disassembly and Inspection ..................................................................... 5-14
5.4.1 Unloader Indicator ............................................................................................. 5-15
5.4.1.1 Disassembly .............................................................................................. 5-15
5.4.1.2 Inspection .................................................................................................. 5-17
5.4.2 Unloader Cover .................................................................................................. 5-18
5.4.2.1 Disassembly .............................................................................................. 5-18
5.4.2.2 Inspection .................................................................................................. 5-19
5.4.3 Unloader Piston and Unloader Cylinder ............................................................ 5-20
5.4.3.1 Disassembly .............................................................................................. 5-20
5.4.3.2 Inspection .................................................................................................. 5-21
5.4.4 Shaft Seal Block ................................................................................................ 5-22
5.4.4.1 Disassembly .............................................................................................. 5-22
5.4.4.2 Inspection .................................................................................................. 5-23
5.4.5 Bearing Cover .................................................................................................... 5-24
5.4.5.1 Disassembly .............................................................................................. 5-24
5.4.6 Separating High-stage and Low-stage Blocks................................................... 5-25
5.4.6.1 Disassembly .............................................................................................. 5-25
5.4.7 Gear Coupling .................................................................................................... 5-25
5.4.7.1 Disassembly .............................................................................................. 5-25
5.4.7.2 Inspection .................................................................................................. 5-26
5.4.8 Removing Oil Injection Pipe............................................................................... 5-27
5.4.8.1 Disassembly ............................................................................................... 5-27
5.4.9 Balance Piston ................................................................................................... 5-28
5.4.9.1 Disassembly .............................................................................................. 5-28
5.4.9.2 Inspection .................................................................................................. 5-28
5.4.10 High-stage Suction Cover and Side Bearings ................................................... 5-29
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