Table of Contents
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Contents
1. Safety precautions ........................................................................................ 10
2. Selecting the installation location ................................................................. 12
3. Selecting an installation site & Accessories.................................................. 12
4. Fixing hanging bolts...................................................................................... 13
5. Installing the unit........................................................................................... 13
6. Refrigerant piping work................................................................................. 14
7. Duct work...................................................................................................... 15
8. Electrical work .............................................................................................. 16
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 or take consent by the supply authority before connection to the system.
MEANINGS OF SYMBOLS ON THE UNIT
WARNING
This symbol is only for R32 refrigerant. The type of the refrigerant used is written on the nameplate on the outdoor unit.
(Risk of fire)
R32 refrigerant is flammable. If the refrigerant leaks, or comes in contact with fire or parts that generate heat, it may create harmful gas
and pose a 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.
• Please report to or take consent by the supply authority before connection
to the system.
• Be sure to read "Safety precautions" before installing the air conditioner.
• Be sure to observe the cautions specified here as they include important
items related to safety.
• The indications and meanings are as follows.
Warning:
Could lead to death, serious injury, etc.
Caution:
Could lead to serious injury in particular environments when operated
incorrectly.
• After reading this manual, be sure to keep it together with the instruction
manual in a handy place on the customer's site.
Warning:
• Do not use refrigerant other than the type indicated in the manuals
provided with the unit and on the nameplate.
- Doing so may cause the unit or pipes to burst, or result in explosion or fire
during use, during repair, or at the time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for
malfunctions or accidents resulting from the use of the wrong type of
refrigerant.
• When handling this product, always wear protective equipment.
EG: Gloves, full arm protection namely boiler suit, and safety glasses.
- Improper handling may result in injury.
• Do not install it by yourself (customer).
Incomplete installation could cause injury due to fire, electric shock, the
unit falling or leakage of water. Consult the dealer from whom you
purchased the unit or special installer.
• Install the unit securely in a place which can bear the weight of the unit.
When installed in an insufficient strong place, the unit could fall causing
injured.
• Use the specified wires to connect the indoor and outdoor units securely
and attach the wires firmly to the terminal board connecting sections so
the stress of the wires is not applied to the sections.
Incomplete connecting and fixing could cause fire.
• Do not use intermediate connection of the power cord or the extension
cord and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.
• Check that the refrigerant gas does not leak after installation has
completed.
• Perform the installation securely referring to the installation manual.
Incomplete installation could cause a personal injury due to fire, electric
shock, the unit falling or leakage of water.
• Perform electrical work according to the installation manual and be sure to
use an exclusive circuit.
If the capacity of the power circuit is insufficient or there is incomplete
electrical work, it could result in a fire or an electric shock.
10
9. Test run ......................................................................................................... 18
10. Maintenance ............................................................................................... 20
This Installation Manual describes only for the indoor unit and the connected
outdoor unit of SUZ series.
If the connected outdoor unit is MXZ series, refer to the Installation Manual for
MXZ series.
Symbols put on the unit
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts.
: Indicates that the main switch must be turned off before servicing.
: Beware of electric shock.
: Beware of hot surface.
Warning:
Carefully read the labels affixed to the main unit.
• Attach the electrical part cover to the indoor unit and the service panel to
the outdoor unit securely.
If the electrical part cover in the indoor unit and/or the service panel in the
outdoor unit are not attached securely, it could result in a fire or an electric
shock due to dust, water, etc.
• Be sure to use the part provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to
a fire, an electric shock, the unit falling, etc.
• Ventilate the room if refrigerant leaks during operation.
If the refrigerant comes in contact with a flame, poisonous gases will be
released.
• 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.
• 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
concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the
appliance.
• The installer and system specialist shall secure safety against leakage
according to local regulation or standards.
- The instructions in this manual may be applicable if local regulation are not
available.
• Pay a special attention to the place, such as a basement, etc. where
refrigeration gas can stay, since refrigeration is heavier than the air.
• This appliance is intended to be used by expert or trained users in shops,
in light industry and on farms, or for commercial use by lay persons.
• When installing, relocating, or servicing the air conditioner, use only the
specified refrigerant written on the outdoor unit to charge the refrigerant
lines. Do not mix the refrigerant with any other refrigerant, and do not allow
air to remain in the lines.
- If air is mixed with the refrigerant, then it may cause abnormal high pressure in
the refrigerant lines, resulting in an explosion and other hazards.
- The use of any refrigerant other than that specified for the system will cause
mechanical failure, system malfunction, or unit breakdown. In the worst case,
this could lead to a serious impediment to securing product safety.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for
malfunctions or accidents resulting from the use of the wrong type of refrigerant.
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