mycom 2016LMC

2200LZJE-HO-C6-N_2013.12.
Table of Contents
Compound 2-stage Screw Compressor 2016**C
vi
2.4 Configuration of Compressor ..................................................................... 2-9
2.4.1 Sectional View ..................................................................................................... 2-9
2.5 Mechanisms ............................................................................................... 2-10
2.5.1 Basics of the Screw Compressor ...................................................................... 2-10
2.5.2 Suction Process ................................................................................................. 2-10
2.5.3 Compression Process ........................................................................................ 2-11
2.5.4 Discharge Proc ess ............................................................................................. 2-11
2.5.5 About Volume Ratio (Vi) .................................................................................... 2-11
2.5.6 Capacity Control Mechanism ............................................................................. 2-13
2.5.7 Bearing ............................................................................................................... 2-13
2.5.8 Seal .................................................................................................................... 2-13
2.6 Gas and Oil Flow ........................................................................................ 2-14
Chapter 3 Installation
3.1 General Precautions for Installation .......................................................... 3-1
3.2 Installation Works ........................................................................................ 3-1
3.2.1 Unpacking ............................................................................................................ 3-1
3.2.2 Storage ................................................................................................................ 3-1
3.2.3 Transfer ................................................................................................................ 3-1
3.2.4 Preparation for Installation ................................................................................... 3-4
3.2.5 Installation ............................................................................................................ 3-5
3.2.5.1 Installation .................................................................................................... 3-5
3.2.5.2 Piping Connection ....................................................................................... 3-5
3.2.5.3 Equipment and Devices for Protection of the Compressor ......................... 3-5
3.2.6 Airtightness Test .................................................................................................. 3-6
3.2.7 Lubricant Charge ................................................................................................. 3-6
3.2.7.1 Initial Charge of Lubricant............................................................................ 3-6
3.2.7.2 Additional Charge of Lubricant .................................................................... 3-7
3.2.8 Charge of Refrigerant .......................................................................................... 3-7
3.2.9 Check after Installation ........................................................................................ 3-7
Chapter 4 Operation of Compressor and Unit
4.1 Lubricant (Refrigerant Oil) .......................................................................... 4-1
4.1.1 Precautions for Selecting the Lubricant ............................................................... 4-1
4.1.2 Recommended Lubricants ................................................................................... 4-1
4.1.2.1 Recommended Lubricants for Ammonia Refrigerant .................................. 4-1
4.1.2.2 Oils for systems using HFC refrigerants ...................................................... 4-2
4.1.3 Change of Lubricant Brand .................................................................................. 4-3
4.1.4 Precautions for Handling lubricant ....................................................................... 4-3
4.1.5 Precautions for Handling JOMO Freol PN46 (Ammonia-inter-soluble Oil) ......... 4-4
4.2 Precautions for Operation ........................................................................... 4-5
4.2.1 Prevention of Liquid Flow-back ........................................................................... 4-5
4.2.2 Purging of Non-Condensable Gases ................................................................... 4-5
4.2.3 Actions for Stopping the Compressor for Long Period of Time ........................... 4-6