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1. Safety precautions
1.1. Before installation and electric work
s Before installing the unit, make sure you read all the
"Safety precautions".
s The "Safety precautions" provide very important
points regarding safety. Make sure you follow them.
s This equipment may not be applicable to EN61000-3-
2: 1995 and EN61000-3-3: 1995.
s This equipment may cause the adverse effect on the
same supply system.
s Please report to or take consent by the supply author-
ity before connection to the 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 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>
: Indicates that the main switch must be turned off before servic-
ing. (This symbol is displayed on the main unit label.) <Color:
Blue>
: Beware of electric shock (This symbol is displayed on the main
unit label.) <Color: Yellow>
: Beware of hot surface (This symbol is displayed on the main unit
label.) <Color: Yellow>
ELV : Please pay attention to electric shock fully because this is
not Safety Extra Low-Voltage (SELV) circuit.
And at servicing, please shut down the power supply for
both of Indoor Unit and Outdoor Unit.
Warning:
Carefully read the labels affixed to the main unit.
Warning:
•
Ask the dealer or an authorized technician to install the air con-
ditioner.
- Improper installation by the user may result in water leakage, elec-
tric shock, or fire.
•
Install the air 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 se-
curely 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 earthquakes and install the unit at the specified place.
- Improper installation may cause the unit to result in injury.
•
Always use 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.
•
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 al-
ways use a special circuit.
- If the power source capacity is inadequate or electric work is per-
formed improperly, electric shock and fire may result.
•
Securely install the cover of control box.
- If the cover and panel are not installed properly, dust or water may
enter the outdoor unit and fire or electric shock may result.
•
When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refriger-
ant (R407C or R22) specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant,
the refrigerant cycle may malfunction and the unit may be dam-
aged.
•
If the air conditioner is installed in a small room, measures must
be taken to prevent the refrigerant concentration from exceed-
ing the safety limit even if the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to prevent
the safety limit from being exceeded. Should the refrigerant leak
and cause the safety limit to be exceeded, hazards due to lack of
oxygen in the room could result.
•
When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.
- If the air conditioner is installed improperly, water leakage, electric
shock, or fire may result.
•
After completing installation work, make sure that refrigerant
gas is not leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove,
oven, or other heat source, it may generate noxious gases.
•
Do not reconstruct or change the settings of the protection de-
vices.
- If the pressure switch, thermal switch, or other protection device is
shorted and operated forcibly, or parts other than those specified
by Mitsubishi Electric are used, fire or explosion may result.
1.2. Precautions for devices that use
R407C refrigerant
Caution:
•
Do not use the existing refrigerant piping.
- The old refrigerant and refrigerator oil in the existing piping con-
tains a large amount of chlorine which may cause the refrigerator
oil of the new unit to deteriorate.
•
Use refrigerant piping made of C1220 (CU-DHP) phosphorus
deoxidized copper as specified in the JIS H3300 "Copper and
copper alloy seamless pipes and tubes". In addition, be sure
that the inner and outer surfaces of the pipes are clean and free
of hazardous sulphur, oxides, dust/dirt, shaving particles, oils,
moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause the
refrigerant residual oil to deteriorate.
•
Store the piping to be used during installation indoors and keep
both ends of the piping sealed until just before brazing. (Store
elbows and other joints in a plastic bag.)
- If dust, dirt, or water enters the refrigerant cycle, deterioration of
the oil and compressor trouble may result.
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