2
Contents
1. Safety precautions..................................................................................... 2
2. Installation location.................................................................................... 3
3. Installing the indoor unit ............................................................................ 3
4. Installing the refrigerant piping .................................................................. 5
5. Drainage piping work................................................................................. 6
6. Electrical work ........................................................................................... 6
7. Test run.................................................................................................... 11
8. Easy maintenance function ..................................................................... 14
1. Safety precautions
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Before installing the unit, make sure you read all the “Safety precau-
tions”.
Ź
Please report to your supply authority or obtain their consent before
connecting this equipment to the power supply system.
Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that must be observed to prevent damage to the unit.
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.
:Indicates a part which must be grounded.
Warning:
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Warning:
• Ask a dealer or an authorized technician to install the unit.
• For installation work, follow the instructions in the Installation Manual and
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• The unit must be installed according to the instructions in order to mini-
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.
• If the air conditioner is installed in a small room, measures must be taken
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safety limit in the event of refrigerant leakage. Should the refrigerant leak
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• Ventilate the room if refrigerant leaks during operation. If refrigerant comes
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local regulations and the instructions given in this manual.
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• Use only accessories authorized by Mitsubishi Electric and ask a dealer or
an authorized technician to install them.
• The user should never attempt to repair the unit or transfer it to another
location.
• After installation has been completed, check for refrigerant leaks. If refrig-
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or portable cooking range, poisonous gases will be released.
1.1. Before installation (Environment)
Caution:
• Do not use the unit in an unusual environment. If the air conditioner is in-
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• Do not install the unit where combustible gases may leak, be produced,
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• Do not keep food, plants, caged pets, artwork, or precision instruments in
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can be damaged by temperature changes or dripping water.
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water may drip from the indoor unit. Do not install the indoor unit where
such dripping can cause damage.
• When installing the unit in a hospital or communications office, be pre-
pared for noise and electronic interference. Inverters, home appliances,
high-frequency medical equipment, and radio communications equipment
can cause the air conditioner to malfunction or breakdown. The air con-
ditioner may also affect medical equipment, disturbing medical care, and
communications equipment, harming the screen display quality.
1.2. Before installation or relocation
Caution:
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packaging bands. Wear protective gloves as you can injure your hands on
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• Be sure to safely dispose of the packaging materials. Packaging materials,
such as nails and other metal or wooden parts may cause stabs or other
injuries.
• Thermal insulation of the refrigerant pipe is necessary to prevent condensa-
tion. If the refrigerant pipe is not properly insulated, condensation will be
formed.
• Place thermal insulation on the pipes to prevent condensation. If the drain-
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furniture, or other possessions may result.
• Do not clean the air conditioner unit with water. Electric shock may result.
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1.3. Before electric work
Caution:
• Be sure to install circuit breakers. If not installed, electric shock may result.
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• When installing the power lines, do not apply tension to the cables.
• Be sure to ground the unit. If the unit is not properly grounded, electric
shock may result.
• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse),
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may result.
1.4. Before starting the test run
Caution:
• Turn on the main power switch more than 12 hours before starting opera-
tion. Starting operation just after turning on the power switch can severely
damage the internal parts.
• Before starting operation, check that all panels, guards and other protec-
tive parts are correctly installed. Rotating, hot, or high voltage parts can
cause injuries.
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• Do not touch any switch with wet hands. Electric shock may result.
• Do not touch the refrigerant pipes with bare hands during operation.
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ing off the main power switch. Otherwise, water leakage or breakdown may
result.
Note:
The phrase “Wired remote controller“ in this installation manual refers only to the PAR-21MAA.
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