Mitsubishi Electric MUZG12NA User Manual

1. BEFORE INSTALLATION
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read these safety precautions and instructions.
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• After reading this manual, be sure to store it with the OPERATING INSTRUCTIONS for future reference.
• Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.
DG79A04VH01
SPLIT-TYPE AIR CONDITIONERS
INSTALLATION MANUAL
ENGLISH
Required Tools for Installation
Phillips screwdriver
Level
Scale
Utility knife or scissors
3 in. (75 mm) hole saw
Torque wrench
Wrench (or spanner)
5/32 in. (4 mm) hexagonal
wrench
Flare tool for R410A
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter with reamer
MSZ-GS06/09/12/15NA
MSY-GS09/12/15NA
When installing multi units, refer to the
installation manual of the multi unit for
outdoor unit installation.
■ Do not install the unit by yourself (user).
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whom you purchased the unit.
■ Follow the instructions detailed in the installation manual.
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ing, or leakage of water.
■ When installing the unit, use appropriate protective equipment and tools for
safety.
Failure to do so could cause injury.
■ Install the unit securely in a place that can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
■ Do not alter 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.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod or tel-
ephone ground. Defective grounding could cause electric shock.
■ 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.
Failure to do so could cause electric shock.
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If gas leaks and accumulates around the unit, it could cause an explosion.
■ 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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an electric shock, the unit falling, etc.
■ 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.
If there is dust, blockage, or loose parts on the power supply plug or the outlet, it could
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■ Securely attach the electrical cover to the indoor unit and the service panel to
the outdoor unit.
If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are
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an electric shock.
■ When installing, relocating, or servicing the unit, make sure that no substance
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Any presence of foreign substance such as air can cause abnormal pressure rise
and may result in explosion or injury. The use of any refrigerant other than that
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breakdown. In the worst case, this could lead to a serious impediment to securing
product safety.
■ 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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heater, space heater, stove, etc., harmful gases will be generated.
■ Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times higher than R22. Not using the appropriate
tools and materials, or improper installation could cause the pipes to burst causing
an injury.
■ When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running and the
stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
could become abnormally high, causing the pipes to burst.
■ When installing the unit, securely connect the refrigerant pipes before starting
the compressor.
If the compressor is started before the refrigerant pipes are connected and the
stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
could become abnormally high, causing the pipes to burst.
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■ Install the unit according to national wiring regulations.
■ When opening or closing the valve below freezing temperatures, refrigerant may
spurt out from the gap between the valve stem and the valve body, resulting in
injuries.
■ Depending on the installation area, install a Ground Fault Interrupt (GFI) circuit
breaker.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric shock
could occur.
■ Perform the drainage/piping work securely according to the installation manual.
If there is defect in the drainage/piping work, water could drip from the unit, and
damage household items.
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This could cause injury.
■ Do not install the outdoor unit where small animals may live.
If small animals enter the unit and damage its electrical parts, it could cause a
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CAUTION
(Could lead to serious injury when operated incorrectly.)
WARNING
(Could lead to death or serious injury.)

Mitsubishi Electric MUZG12NA Specifications

General

Refrigerant	R410A
Cooling Capacity	12000 BTU/h
Indoor Unit Dimensions (W x H x D)	798 x 285 x 223 mm
Outdoor Unit Dimensions (W x H x D)	765 x 550 x 285 mm
Weight (Indoor Unit)	9 kg
Weight (Outdoor Unit)	32 kg
Indoor Unit Dimensions (HxWxD)	285 x 798 x 223 mm
Outdoor Unit Dimensions (HxWxD)	550 x 765 x 285 mm
Indoor Unit Weight	9 kg
Outdoor Unit Weight	32 kg
Operating Temperature (Cooling)	-5°C to 46°C
Operating Temperature (Heating)	-15°C to 24°C

Summary

1. BEFORE INSTALLATION

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

Essential safety precautions and instructions to follow during installation.

Required Tools for Installation

List of tools and equipment necessary for the installation process.

1-2. SELECTING THE INSTALLATION LOCATION

INDOOR UNIT

Guidelines for choosing an optimal location for the indoor air conditioner unit.

OUTDOOR UNIT

Recommendations for selecting the best placement for the outdoor unit.

REMOTE CONTROLLER

Criteria for positioning the remote controller for effective operation.

1-3. SPECIFICATIONS

1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR WIRE CONNECTION

Details on electrical power requirements and wiring connections for units.

1-3-2. REFRIGERANT PIPES

Specifications and requirements for refrigerant piping, including insulation.

1-4. INSTALLATION DIAGRAM

ACCESSORIES

List of included accessories provided with the indoor unit for installation.

FIELD-SUPPLIED PARTS

List of parts that need to be supplied by the installer for the setup.

2. INDOOR UNIT INSTALLATION

2-1. ATTACHING THE INSTALLATION PLATE

Step-by-step guide for securely mounting the indoor unit's installation plate.

2-2. DRILLING

Instructions for drilling holes in the wall for unit installation and piping.

2-3. CONNECTING WIRES FOR INDOOR UNIT

Procedures for making electrical connections to the indoor unit.

2-4. PIPE FORMING AND DRAIN PIPING

2-4-1. PIPE FORMING

Detailed steps for shaping and preparing refrigerant pipes for connection.

2-4-2. DRAIN PIPING

Instructions for correctly installing the drain piping for condensate removal.

3. OUTDOOR UNIT INSTALLATION

3-1. CONNECTING WIRES FOR OUTDOOR UNIT

Guide for wiring the outdoor unit, including power and control connections.

3-2. FLARE CONNECTION

Step-by-step process for creating flare connections for refrigerant piping.

3-3. PIPE CONNECTION

Procedures for connecting refrigerant pipes between indoor and outdoor units.

3-4. INSULATION AND TAPING

Instructions on insulating and taping refrigerant pipes to prevent condensation and frostbite.

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST

Steps for purging the system and performing leak tests to ensure integrity.

4-2. TEST RUN

Procedures for conducting a test run to verify proper operation of the air conditioner.

4-3. AUTO RESTART FUNCTION

Explanation of the auto restart feature and its operation.

4-4. EXPLANATION TO THE USER

Guidance for installers to explain unit operation to the end-user.

5. PUMPING DOWN

6. CONNECTING THE INTERFACE/CONNECTOR CABLE TO THE AIR CONDITIONER

1-3. SELECTING OPTIONAL DIFFERENT-DIAMETER JOINTS

1-4. SELECTING THE INSTALLATION LOCATION

FREE SPACE REQUIRED AROUND OUTDOOR UNIT

Diagrams showing required clearances around the outdoor unit for proper ventilation.

1-5. INSTALLATION DIAGRAM

2. OUTDOOR UNIT INSTALLATION

2-1. INSTALLING THE UNIT

Instructions for physically mounting and securing the outdoor unit.

2-2. CONNECTING WIRES FOR OUTDOOR UNIT

3. FLARING WORK AND PIPE CONNECTION

3-1. FLARING WORK

Step-by-step guide for properly flaring copper pipes for refrigerant connections.

3-2. PIPE CONNECTION

Process for connecting refrigerant pipes, including tightening torque specifications.

3-3. INSULATION AND TAPING

Guidance on insulating and taping pipes to prevent condensation and heat loss/gain.

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST

Steps for purging the system and performing leak tests to ensure integrity.

4-2. GAS CHARGE

Instructions for charging the system with the correct amount of refrigerant.

4-3. TEST RUN

Procedures for performing operational checks after installation.

4-4. EXPLANATION TO THE USER

Advice for installers on explaining the unit's features and operation to the user.

5. PUMPING DOWN

5. PURGE