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Contents
1. Safety precautions ......................................................................................... 1
2. Selecting the installation location ................................................................... 2
3. Installation diagram ........................................................................................ 3
4. Installing the indoor unit ................................................................................. 3
5. Refrigerant piping work .................................................................................. 5
6. Drainage piping work ..................................................................................... 7
7. Electrical work ................................................................................................ 8
8. Test run ........................................................................................................ 15
9. System control ............................................................................................. 17
10. Installing the grille ........................................................................................ 17
11. Easy maintenance function .......................................................................... 20
1. Safety precautions
► Before installing the unit, make sure you read all the “Safety Precautions”.
► The “Safety Precautions” provide very important points regarding safety. Make sure you follow them.
► Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that should be observed to prevent damage to the
unit.
Symbols used in the illustrations
: Indicates a part which must be grounded.
: Be sure not to do.
After installation work has been completed, explain the “Safety Precautions,” use,
and maintenance of the unit to the customer according to the information in the
Operation Manual and perform the test run to ensure normal operation. Both the
Installation Manual and Operation Manual must be given to the user for keeping.
These manuals must be passed on to subsequent users.
MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING
(Risk of fire)
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
In case that refrigerant type is R32, this unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
Warning:
• Carefully read the labels affixed to the main unit.
• Ask a dealer or an authorized technician to install, relocate and repair the
unit.
• The user should never attempt to repair the unit or transfer it to another lo
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cation.
• Do not alter the unit.
• For installation and relocation work, follow the instructions in the Installa
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tion Manual and use tools and pipe components specifically made for use
with refrigerant specified in the outdoor unit installation manual.
• The unit must be installed according to the instructions in order to mini
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mize the risk of damage from earthquakes, typhoons, or strong winds. An
incorrectly installed unit may fall down and cause damage or injuries.
• The unit must be securely installed on a structure that can sustain its
weight.
• The appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation.
• If the air conditioner is installed in a small room or closed room, measures
must be taken to prevent the refrigerant concentration in the room from
exceeding the safety limit in the event of refrigerant leakage. Should the
refrigerant leak and cause the concentration limit to be exceeded, hazards
due to lack of oxygen in the room may result.
• Keep gas-burning appliances, electric heaters, and other fire sources (igni
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tion sources) away from the location where installation, repair, and other air
conditioner work will be performed.
If refrigerant comes into contact with a flame, poisonous gases will be re
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leased.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes
into contact with a flame, poisonous gases will be released.
• All electric work must be performed by a qualified technician according to
local regulations and the instructions given in this manual.
• Use only specified cables for wiring. The wiring connections must be made
securely with no tension applied on the terminal connections. Also, never
splice the cables for wiring (unless otherwise indicated in this document).
Failure to observe these instructions may result in overheating or a fire.
• When installing or relocating, or servicing the air conditioner, use only the
specified refrigerant written on outdoor unit to charge the refrigerant lines. Do
not mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high
pressure in the refrigerant line, and may result in an explosion and other
hazards.
The use of any refrigerant other than that specified for the system will
cause mechanical failure or system malfunction or unit breakdown. In the
worst case, this could lead to a serious impediment to securing product
safety.
• The appliance shall be installed in accordance with national wiring regula
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tions.
• This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction con
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cerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the ap
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pliance.
• The terminal block cover panel of the unit must be firmly attached.
• If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
• Use only accessories authorized by Mitsubishi Electric and ask a dealer or
an authorized technician to install them.
• After installation has been completed, check for refrigerant leaks. If refrig
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erant leaks into the room and comes into contact with the flame of a heater
or portable cooking range, poisonous gases will be released.
• Do not use means to accelerate the defrosting process or to clean, other
than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ig
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nition sources (for example: open flames, an operating gas appliance or an
operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Pipe-work shall be protected from physical damage.
• The installation of pipe-work shall be kept to a minimum.
• Compliance with national gas regulations shall be observed.
• Keep any required ventilation openings clear of obstruction.
• Do not use low temperature solder alloy in case of brazing the refrigerant
pipes.
• When performing brazing work, be sure to ventilate the room sufficiently.
Make sure that there are no hazardous or flammable materials nearby.
When performing the work in a closed room, small room, or similar loca
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tion, make sure that there are no refrigerant leaks before performing the
work.
If refrigerant leaks and accumulates, it may ignite or poisonous gases may
be released.
Note:
The phrase “Wired remote controller” in this installation manual refers only to the PAR-33MAA. If you need any information for the other remote controller,
please refer to either the installation manual or initial setting manual which are included in these boxes.
For safe and correct use, please read this manual and the outdoor unit installation manual thoroughly before installing the air-conditioner unit.
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