7
en
Contents
1.
Safety precautions ....................................................................................7
1.1. Before installation and electric work .........................................7
1.2. Precautions for devices that use R32 refrigerant......................8
1.3. Before getting installed .............................................................8
1.4. Before getting installed (moved) - electrical work .....................8
1.5. Before starting the test run........................................................9
2.
Indoor unit accessories .............................................................................9
3.
Selecting an installation site......................................................................9
3.1. Install the indoor unit on a ceiling strong enough to sustain its
weight........................................................................................9
3.2. Securing installation and service space....................................9
3.3. Combining indoor units with outdoor units ................................9
4.
Fixing hanging bolts ................................................................................10
4.1. Fixing hanging bolts ................................................................10
5.
Installing the unit .....................................................................................10
5.1. Hanging the unit body .............................................................10
5.2. Confirming the unit’s position and fixing hanging bolts ...........10
6.
Refrigerant pipe and drain pipe specifications ........................................10
6.1. Refrigerant pipe and drain pipe specifications ........................10
6.2. Refrigerant pipe, drain pipe.....................................................10
7.
Connecting refrigerant pipes and drain pipes .........................................11
7.1. Refrigerant piping work...........................................................11
7.2. Drain piping work ....................................................................11
7.3. Confirming drain discharge.....................................................11
8.
Duct work ................................................................................................12
9.
Electrical wiring .......................................................................................13
9.1. Power supply wiring................................................................13
9.2. Connecting remote controller, indoor
and outdoor
transmission cables ................................................................14
9.3. Connecting electrical connections ..........................................14
9.4. External I/O specifications ......................................................14
9.5. Selecting the external static pressure.....................................15
9.6. Setting addresses ...................................................................15
9.7. Sensing room temperature with the built-in sensor in
a remote controller..................................................................15
9.8. Changing the power voltage setting .......................................15
9.9. Electrical characteristics .........................................................16
1. Safety precautions
1.1. Before installation and electric work
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
Warning:
• 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 pur-
chased the unit or special installer.
• Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, electric shock, or
fire.
• Install the unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in injuries.
• Use the specified cables for wiring. Make the connections securely so that
the outside force of the cable is not applied to the terminals.
- Inadequate connection and fastening may generate heat and cause a fire.
• Prepare for typhoons and other strong winds and earthquakes and install
the unit at the specified place.
- Improper installation may cause the unit to topple and result in injury.
• Always use an air cleaner, humidifier, electric heater, and other accessories
specified by Mitsubishi Electric.
- Ask an authorized technician to install the accessories. Improper installation
by the user may result in water leakage, electric shock, or fire.
• Never repair the unit. If the air conditioner must be repaired, consult the
dealer.
- If the unit is repaired improperly, water leakage, electric shock, or fire may
result.
• Do not touch the heat exchanger fins.
- Improper handling may result in injury.
• 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.
• If refrigerant gas leaks during installation work, ventilate the room.
- If the refrigerant gas comes into contact with a flame, poisonous gases will be
released.
• Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or fire may
result.
• Have all electric work done by a licensed electrician according to “Electric
Facility Engineering Standard” and “Interior Wire Regulations” and the
instructions given in this manual and always use a special circuit.
- If the power source capacity is inadequate or electric work is performed
improperly, electric shock and fire may result.
• 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.
• Keep the electric parts away from water (washing water etc.).
- It might result in electric shock, catching fire or smoke.
• 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.
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.
MEANINGS OF SYMBOLS ON THE UNIT
WARNING
(Risk of fire)
This symbol is only for R32 refrigerant. The type of the refrigerant used is written on the nameplate on the outdoor unit.
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.
: 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. (This symbol is
displayed on the main unit label.) <Color: yellow>
: Beware of electric shock (This symbol is displayed on the main unit label.)
<Color: yellow>
Warning:
Carefully read the labels affixed to the main unit.
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