mycom 200VLD User Manual

2205Q2JE-HO-S6-N_2020.01.
Table of Contents
SCV-series Screw Compressors
vii
2.3.3 Outer Dimensions ............................................................................................... 2-7
2.4 Compressor Structure and Mechanism .................................................. 2-10
2.4.1 Overview of SCV-series Screw Compressor .................................................... 2-10
2.4.2 Refrigerant Gas Compression Mechanism ....................................................... 2-11
2.4.2.1 Gas Suction Phase ....................................................................................2-11
2.4.2.2 Compression Phase .................................................................................. 2-12
2.4.2.3 Discharge Phase ....................................................................................... 2-12
2.4.3 Internal Volume Ratio Vi ................................................................................... 2-13
2.4.3.1 What is the Internal Volume Ratio Vi ?...................................................... 2-13
2.4.3.2 Variable Vi Mechanism .............................................................................. 2-14
2.4.3.3 Why the Vi Needs to Be Changed ? ......................................................... 2-15
2.4.4 Bearings and Balance Piston............................................................................ 2-18
2.4.5 Shaft Seal ......................................................................................................... 2-18
2.4.6 Capacity Control ............................................................................................... 2-18
2.4.7 Oil Supply Route ............................................................................................... 2-18
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 Transportation ..................................................................................................... 3-1
3.2.4 Preparation for Installation .................................................................................. 3-3
3.2.5 Installation ........................................................................................................... 3-5
3.2.5.1 Placement ................................................................................................... 3-5
3.2.5.2 Shaft Alignment between the Compressor and Driving Machine ................ 3-5
3.2.5.3 Piping Connection ....................................................................................... 3-6
3.2.5.4 Equipment and Devices for Protection of the Compressor ......................... 3-6
3.2.6 Airtightness Test ................................................................................................. 3-7
3.2.7 Vacuuming .......................................................................................................... 3-7
3.2.8 Lubricating Oil Charge ........................................................................................ 3-7
3.2.8.1 Initial Charge of Lubricating Oil ................................................................... 3-7
3.2.8.2 Additional Charge of Lubricating Oil ........................................................... 3-7
3.2.9 Charge of Refrigerant ......................................................................................... 3-7
3.2.10 Checkout after Installation ........................................................................................... 3-7
Chapter 4 Compressor and Package Unit Operation
4.1 Adjustment of Vi ......................................................................................... 4-1
4.1.1 Overview ............................................................................................................. 4-1
4.1.2 How to Adjust the Vi Setting ............................................................................... 4-1
4.2 Lubricating Oil (Refrigerant Oil) ................................................................ 4-6
4.2.1 Precautions for Selecting the Lubricating Oil ...................................................... 4-6
4.2.2 Recommended Lubricating Oils.......................................................................... 4-6
4.2.2.1 Recommended Lubricating Oil for Ammonia Refrigerant ........................... 4-6
4.2.2.2 Oils for Systems Using Hydrofluorocarbon (HFC) Refrigerants ................. 4-7

mycom 200VLD Specifications

General

Brand	mycom
Model	200VLD
Category	Air Compressor
Language	English