Mitsubishi MSZ-GL12NA-U1 - Installation Manual

A user manual for Mitsubishi Electric’s split-type air conditioning systems covers essential setup, safety, and operational guidelines. The document emphasizes critical safety measures–such as proper grounding, refrigerant handling, and electrical precautions–to prevent accidents during installation. It also outlines technical requirements like optimal unit placement, refrigerant pipe sizing, electrical specifications (voltage/amperage), and drainage protocols to ensure reliable performance. Installation diagrams and part lists further clarify mounting, piping connections, and component compatibility for both indoor and outdoor units.

Page 1 – Safety Precautions and Installation Requirements
Page 2 – Installation Guidelines and Technical Specifications
Page 3 – Installation Diagrams and Part List
Page 4 – Indoor Unit Mounting Procedures
Page 5 – Refrigerant Piping and Drain Installation
Page 6 – Outdoor Unit Electrical and Pipe Flaring
Page 7 – System Testing and Leak Detection
Page 8 – Relocation and Maintenance Procedures

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1. BEFORE INSTALLATION

1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY

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INSTALLATION MANUAL

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Required Tools for Installation

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Do not install the unit by yourself (user).

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Follow the instructions detailed in the installation manual.

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When installing the unit, use appropriate protective equipment and tools for

safety.

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Install the unit securely in a place that can bear the weight of the unit.

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Perform electrical work according to the installation manual and be sure to use
an exclusive circuit. Do not connect other electrical appliances to the circuit.

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Ground the unit correctly.

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Do not damage the wires.

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Be sure to shut off the main power when setting up the indoor P.C. board or
wiring.

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Do not use intermediate connection of the power cord or the extension cord.

Do not connect many devices to one AC outlet.

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When plugging the power supply plug into the outlet, make sure that there is
no dust, blockage, or loose parts both in the outlet and on the plug. Verify that
the power supply plug is completely in the outlet.

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Securely attach the electrical cover to the indoor unit and the service panel to
the outdoor unit.

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When installing, relocating, or servicing the unit, make sure that no substance
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Do not discharge the refrigerant into the atmosphere. Check that the refriger-
ant gas does not leak after installation has been completed. If refrigerant leaks
during installation, ventilate the room.

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Use appropriate tools and piping materials for installation.

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When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes.

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When installing the unit, securely connect the refrigerant pipes before starting
the compressor.

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Install the unit according to national wiring regulations.

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Depending on the installation area, install a Ground Fault Interrupt (GFI) circuit

breaker.

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Perform the drainage/piping work securely according to the installation manual.

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Do not install the outdoor unit where small animals may live.

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About this manual

Brand: Mitsubishi
Model: MSZ-GL12NA-U1
Document type: Installation Manual
Language(s): English
Pages: 8
File size: 514.2 KB
Format: PDF

Summary

Page 1 - Safety Precautions and Installation Requirements

Mandatory safety steps, proper tool usage, grounding procedures, refrigerant handling warnings, electrical safety, and installation precautions.

Page 2 - Installation Guidelines and Technical Specifications

Guidelines for optimal placement of indoor and outdoor units, remote controller positioning, refrigerant pipe requirements, and electrical specifications including voltage and amperage.

Page 3 - Installation Diagrams and Part List

Diagrams and lists detailing required accessories, field-supplied parts, installation instructions, clearance requirements, and piping connections for indoor and outdoor units.