Mitsubishi Electric MEGR - User Manual

UM_FAN
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
MEHITS S.p.A.
English
Air conditioners for IT Cooling
MEGR
INSTALLATION, USE AND MAINTENANCE MANUAL
Italian is the original language.
The other languages versions are translation of the original.
To ensure safe and correct use, carefully read this manual and make sure to understand all the contained indications
and information.
English
Engsh

Summary

GENERAL PROVISIONS

1.1 General information and safety

Provides essential information and safety guidelines for users interacting with the machine.

1.1.1 Scope of the manual

Defines the purpose of the manual and the intended audience for its use.

SYMBOLS

Danger, Warning, Attention Symbols

Explains symbols indicating danger, warning, and attention for hazard levels.

Prohibition and Obligation Symbols

Explains symbols indicating prohibited actions and mandatory obligations.

Information and Notice Symbols

Explains symbols for important technical information and general notices.

GLOSSARY AND TERMINOLOGY

Key Personnel Definitions

Defines roles like Manufacturer, Buyer, Owner, Installer, User, Operator, and Technician.

Maintenance Definitions

Defines routine and extraordinary maintenance operations.

Attached documentation

List of Delivered Documents

Details manuals, wiring diagrams, drawings, instructions, and conformity declarations.

General safety rules

Precautions against Residual Risks

Covers mechanical, electrical, environmental, and other residual risks and their precautions.

List of machine internal symbols

Internal Component Symbols

Illustrates symbols for internal moving components, voltage, and earth connection.

Hazard Symbols

Illustrates symbols for fire risk and electrical hazards.

Procedure for requesting support

How to Request Technical Support

Details how to contact support, what information to provide, and fault reporting.

Machine identification

3.2.1 Designation

Explains the alphanumeric model code and its components like coil type, acoustic preparation, and fan motor.

3.2.2 Identification plate

Describes the information found on the machine's identification label for safe operation.

Storage temperature

Operating limits

Description of the main components

Air-Cooled Condensers Overview

Describes air-cooled condensers for IT Cooling with axial fans, design flexibility, and application in conditioning systems.

Optional Features

Lists optional accessories like support feet, shut-off taps, protective treatments, and anchoring kits.

System Design and Critical Points

Emphasizes the need for full system design before installation to ensure safety and performance.

Working Principle

Explains how machines work by condensing coolant using fans and heat exchange.

3.5.1 Electrical panel

3.5.2 Cooling circuit

3.5.3 Ventilating section

3.5.4 Structure

TRANSPORT, STORAGE AND INSTALLATION

4.1 Transport and moving

Covers procedures for transporting and moving the machine safely.

4.1.1 Storage

Specifies storage conditions in a protected environment to prevent overturning and exposure to elements.

4.1.2 Transport

Recommends using low loader trucks with tarpaulins and securing units with ratchet straps for road transport.

4.1.3 Discharge

4.1.4 Receipt and inspection

4.1.5 Handling

Disassembly of the machine panels

Machine panels

Explains that side panels are screwed onto the machine and can be removed.

Installation

4.3.1 Installation of the standard machine

Outlines general project requirements, safety plans, and site preparation for machine installation.

Site Requirements

Specifies requirements for installation site: flat area, adequate floor capacity, accessibility, ventilation, and clearances.

Installation Standards

Mandates installation according to EN 378-3 and local regulations, considering safety classes.

4.3.2 Machine positioning

Area Accessibility and Personnel Safety

4.3.3 Fixing the machines to the ground

4.3.4 Installation clearances

4.3.5 Installation and position of any obstacles

4.3.6 Installation in places with heavy snowfall

4.3.7 Installation in places with strong winds for AC fans

Connection of the cooling circuit to the internal machine

4.4.1 Type of copper to be used for the cooling line

Describes the types of copper (soft and hard) and their suitable applications for cooling lines.

4.4.2 General information for the completion of the cooling line

Provides guidelines for routing cooling lines, including limiting pressure drops, facilitating oil return, and pipe fixing.

4.4.3 Speed of the coolant in the pipes

4.4.4 Thickness of the pipes

4.4.5 Pipe identification

Diameters of the machine cooling connections

Installation diagram

Legend

Explains the numbering and function of components in the installation diagram, including valves and receivers.

Connection of the cooling pipes to the machine

4.4.8.1 Connection of the cooling pipes to the remote condenser

Instructs on installing ball valves on the remote condenser and discharging the condenser.

4.4.8.2 Connection of the pipes and fittings of the cooling line

Coolant charge

4.4.9.1 Refrigerant content of remote condensers

Lists coolant charges required for remote condensers, categorized by model and exchanger type.

Electrical connections

4.5.1 Electrical data

Refers to wiring diagrams, data plates, and Data Book for electrical specifications.

4.5.2 Electric power supply connection

Details power supply requirements, protections, conductor types, cable sections, and grounding.

4.5.3 Electrical panel

4.5.4 Auxiliary electrical connections with the internal unit

Optional installation

4.6.1 Vertical air flow

Describes the vertical airflow accessory, its availability for specific fan counts, and installation requirements.

Support feet for vertical air flow

Lifting and rotation hooks for MEGR-MC

Type 1 Lifting and Rotation

Details the first type of lifting and rotation supports, including dimensions and fixing points.

Type 2 Lifting and Rotation

Details the second type of lifting and rotation supports for units with 2/3 fans, including dimensions.

Type 3 Lifting and Rotation

Details the third type of lifting and rotation supports for double mobile units, including diagrams and obligations.

Safe Sling Bar Usage for Lifting

Provides obligations for sling bar length and height to ensure safe lifting operations.

Lifting and rotation hooks for MEGR-TF

Type 1 & 2 Lifting;Rotation for MEGR-TF

Details Type 1 and Type 2 lifting and rotation supports for MEGR-TF units, including diagrams and dimensions.

Type 3 Lifting and Rotation for MEGR-TF

Details Type 3 lifting and rotation supports for double mobile units, including diagrams and obligations.

Earthquake anchoring kit only for MEGR-MC

Cooling;electrical connections in seismic areas

PRE-COMMISSIONING

5.1 Before starting the unit

Instructs the installer to check electrical and cooling connections, leaks, and shut-off valve status before commissioning.

START

6.1 Machine start-up

Details commissioning procedures by a specialist engineer, including checks, calibrations, and operator questions.

METHOD OF USE

7.1 Provisions and warnings for use

States that daily use requires operator intervention only for checks, emergencies, or planned stops for optimal performance.

7.2 Emergency stop

Explains that no specific emergency stop device is needed as it would be identical to the normal stop.

7.3 Prolonged shutdowns of the machine

Outlines checks required by a specialist engineer for extended machine inactivity, including pressure vessels and leak tests.

7.4 Start-up after extended machine inactivity

FIRST DIAGNOSTICS

8.1 Troubleshooting

Provides a list of common faults, their causes, solutions, and intervention levels for machine issues.

MAINTENANCE

9.1 Maintenance instructions

Mandates that all maintenance must be done by authorized, trained individuals with PPE, following manufacturer procedures.

Pre-maintenance Safety Measures

Lists essential safety measures before maintenance, including isolating power, displaying signs, and using PPE.

Precautions during Maintenance

Details precautions for handling refrigerant, avoiding fluid dispersion, using correct equipment, and ensuring no foreign bodies remain.

9.2 Scheduled maintenance

Instructs to perform scheduled maintenance activities at indicated intervals to maintain warranty and safety.

9.3 Table of general maintenance jobs

Check that the coils are clean

9.4.1 Cu-AL tube and fin coils

9.4.2 Treated Cu-Al tube and fin coils

9.4.3 Microchannel coils

9.4.4 MICROCHANNEL coils with E-COATING treatment

Approved detergent for e-coated coils

Extraordinary maintenance

DISPOSAL OF THE MACHINE

Environmental Impact Minimization

Details requirements for collecting refrigerant, lubrication oil, and components for proper disposal.

Greenhouse Gas and Electrical Waste Disposal

Covers disposal of fluorinated greenhouse gases and electrical/electronic parts according to regulations.

Machine Identification Symbol

Explains the symbol indicating that the machine must be disposed of by separating materials.

Mitsubishi Electric MEGR Specifications