mycom i160M User Manual

2203M4JE-MY-iS2-N_2017.04.
i-Series Screw Compressor
Instruction Manual
i125S / i125L
i160S / i160M / i160L
CAUTION
Before operating, servicing, or inspecting this product, read this manual thoroughly to
fully understand the contents.
Keep this instruction manual in a safe, designated place for future reference whenever
the manual is needed.
Specifications of this product and contents of this manual are subject to change without
prior notice due to technical improvements, and the like.
This manual is applied to each compressor after the serial number
shown below.
i125S: 8750303 i125L: 8770301
i160S: 8710055 i160M: 8720018 i160L: 8730030

mycom i160M Specifications

General

Brand	mycom
Model	i160M
Category	Air Compressor
Language	English

Summary

Warranty and Disclaimer

Warranty Clauses

Disclaimer of Warranty

Important Information

Important Information for Safe Use of this Product

Highlights critical safety measures and precautions for operating the product.

Chapter 1 Safety

1.1 Strict Requirements and Prohibitions

Details essential rules and prohibitions for safe operation and maintenance.

1.3 Residual Risks

Identifies potential hazards and outlines countermeasures for safe operation.

1.4 Safety Devices

1.4.1 Emergency Stop Button

1.4.2 Circuit Breakers of Motor Main Power and Control Power (with Lockout/Tagout Mechanism)

Explains the use of circuit breakers with lockout/tagout for safety.

1.4.3 Compressor Protective Devices

Describes various protective devices for compressor safety and their settings.

Chapter 2 Compressor Specifications and Configuration

2.3 Compressor Specifications

Presents detailed technical specifications for the i-Series compressors.

2.3.1 Standard Specifications

Lists the standard technical data and parameters for the i-Series compressors.

2.3.2 Operation Limits

Defines the permissible operating ranges for speed, pressure, and temperature.

2.3.3 Alarm Set Values

Specifies alarm and stop set values for compressor protection.

2.4 Configuration of Compressor

2.4.3 Parts Configuration Table

2.5 Mechanisms

2.5.6 Capacity Control Mechanism

Chapter 3 Installation

3.1 General Precautions for Installation

Provides essential safety and procedural guidelines before starting installation.

3.2 Installation Works

Details the step-by-step procedures for installing the compressor package unit.

3.2.3 Transportation

Procedures and safety precautions for safely transporting the compressor.

3.2.5 Installation

3.2.5.1 Piping Connection

3.2.7 Lubricating Oil Charge

3.2.7.1 Initial Charge of Lubricating oil

3.2.8 Charge of Refrigerant

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

Details on lubricating oil properties, selection, and management.

4.1.1 Precautions for Selecting the Lubricating Oil

Guidelines for choosing the correct lubricating oil based on system requirements.

4.1.2 Recommended Lubricating Oils

Lists specific oil brands and types recommended for different refrigerants.

4.1.5 Lubricating Oil Management Criteria

4.1.6 Lubricating Oil Replacement Timing

4.2 Precautions for Operation

Important considerations for safe and efficient compressor operation.

4.2.1 Prevention of Liquid Flow-back

How to prevent liquid refrigerant from returning to the compressor.

4.2.2 Purging of Non-Condensable Gases

4.3 When Stopping the Compressor for a Long Time

Chapter 5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

General safety and procedural guidelines before performing maintenance.

5.2 Maintenance and Inspection List

Lists items and intervals for regular maintenance and inspection tasks.

5.2.1 Daily Management

5.2.2 Periodic Inspection

Scheduled inspection tasks to be performed at regular intervals.

5.2.3 Guidelines for Compressor Overhaul Interval

5.3 Compressor Disassembly Preparation

Prepares for compressor disassembly, covering tools and parts.

5.3.2 Replacement Parts

Lists standard replacement parts for overhauled i-series compressors.

5.3.3 Refrigerant Gas Treatment

Procedures for handling refrigerant gas during disassembly.

5.3.3.2 Refrigerant Gas Recovery

Methods for recovering refrigerant gas safely before disassembly.

5.3.4 Removing Parts Connected to the Unit

5.3.5 Removing and Lifting the Compressor

Guidance on safely removing and lifting the compressor unit.

5.4 Disassembly and Inspection

Detailed steps for disassembling compressor parts and inspecting them.

5.4.1 Shaft Seal Block

Procedure for disassembling and inspecting the shaft seal assembly.

5.4.1.1 Disassembly

5.4.1.2 Inspection

5.4.2 Bearing Cover

5.4.3 Balance Piston

5.4.3.2 Inspection

5.4.5 Thrust Bearing Block

Disassembly and inspection of the thrust bearing assembly.

5.4.5.1 Disassembly

5.4.5.2 Inspection

5.4.6 Bearing Head

5.4.7 Rotors

Disassembly and inspection of the compressor rotors, critical components.

5.4.7.1 Disassembly

5.4.7.2 Inspection

Checks for rotor wear and damage, with replacement standards.

5.4.8 Radial Bearings

5.4.9 Suction Strainer and Check Valve

Disassembly and inspection of the suction strainer and check valve.

5.4.9.1a Disassembly (i125*)

5.4.9.1b Disassembly (i160*)

5.4.9.2 Inspection

5.4.10 Unloader

5.4.10.2 Inspection

5.5 Reassembly

General procedures and precautions for reassembling the compressor.

5.5.2 Rotor and Inner Race of Radial Bearing

Procedure for installing radial bearing inner races onto rotors and assembling rotors.

5.5.3 Bearing Head

5.5.5 Suction Strainer and Check Valve

Reassembly of the suction strainer and check valve components.

5.5.5.1 i 125*

5.5.5.2 i 160*

5.5.6 Adjustment of Thrust Bearing and End Clearance

Procedure for adjusting the thrust bearing and end clearance.

5.5.6.1 End Clearance Measurement

5.5.6.2 End Clearance Adjustment

Methods for adjusting end clearance if it falls outside specifications.

5.5.6.3 Tightening after End Clearance Adjustment

5.5.9 Shaft Seal Block

Detailed procedure for reassembling the shaft seal block.

Chapter 6 Troubleshooting

01: Compressor does not start up

Troubleshooting steps for when the compressor fails to start.

02: Compressor stops immediately after startup

Diagnosing why the compressor stops shortly after startup.

03: Abnormally low pressure (decrease of suction pressure)

Identifying causes and solutions for low suction pressure.

04: Low oil pressure (low oil supply pressure)

Troubleshooting low oil supply pressure issues.

05: Abnormally high pressure (abnormal discharge pressure)

Addressing abnormally high discharge pressure problems.

06: Discharge temperature is abnormally high

Resolving issues with abnormally high discharge temperatures.

07: Leak from mechanical seal part

Diagnosing and fixing leaks from the mechanical seal.

09: Capacity control malfunction

10: Compressor generates abnormal vibration and/or sound

Appendix 2: Basic Points of Design and Manufacturing for the Compressors Multi- package