mycom 1612LSC series

2202L5JE-DA-C5-N_2015.05.
Table of Contents
Compound 2-stage Screw Compressor 1612LSC Speed Increaser Type
vii
4.2 Precautions for Operation ........................................................................... 4-7
4.2.1 Prevention of Liquid Flow-back ........................................................................... 4-7
4.2.2 Purging of Non-condensable Gases .................................................................... 4-7
4.3 When Stopping the Compressor for a Long Time .................................... 4-8
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 Work Place .................................................................... 5-7
5.3.2 Replacement Parts .............................................................................................. 5-7
5.3.2 Refrigerant Gas Recovery ............................................................................... 5-10
5.3.4 Removing Parts Connected to the Unit ............................................................. 5-11
5.3.5 Compressor Removing and Lifting .................................................................... 5-12
5.3.6 Removing Oil from Inside the Compressor ........................................................ 5-12
5.4 Disassembly and Inspection ..................................................................... 5-13
5.4.1 Shaft Seal Block ................................................................................................ 5-15
5.4.1.1 Disassembly .............................................................................................. 5-15
5.4.1.2 Inspection .................................................................................................. 5-16
5.4.2 Unloader Indicator ............................................................................................. 5-17
5.4.2.1 Disassembly .............................................................................................. 5-18
5.4.2.2 Inspection .................................................................................................. 5-19
5.4.3 Unloader Cover .................................................................................................. 5-20
5.4.3.1 Disassembly .............................................................................................. 5-20
5.4.3.2 Inspection .................................................................................................. 5-20
5.4.4 Unloader Piston and Unloader Cylinder ............................................................ 5-21
5.4.4.1 Disassembly .............................................................................................. 5-21
5.4.4.2 Inspection .................................................................................................. 5-21
5.4.5 Speed increaser Gear Casing Cover ................................................................. 5-22
5.4.5.1 Disassembly .............................................................................................. 5-22
5.4.6 Speed increaser Gear Casing Block ................................................................. 5-23
5.4.6.1 Disassembly .............................................................................................. 5-23
5.4.6.2 Inspection .................................................................................................. 5-26
5.4.7 Separating High-stage and Low-stage .............................................................. 5-27
5.4.7.1 Disassembly .............................................................................................. 5-27
5.4.8 Gear Coupling .................................................................................................... 5-28
5.4.8.1 Disassembly .............................................................................................. 5-28
5.4.8.2 Inspection .................................................................................................. 5-28
5.4.9 Balance Piston Cover ........................................................................................ 5-29
5.4.10 Balance Piston ................................................................................................... 5-29