Mitsubishi Electric CITY MULTI PUMY-SM112VKM Installation Manual page 4

• Use only authorized accessories and ask a dealer or an authorized
technician to install them. If accessories are incorrectly installed, water
leakage, electric shock, or fire may result.
• The user should never attempt to repair the unit or transfer it to
another location. If the unit is installed incorrectly, water leakage,
electric shock, or fire may result. If the air conditioner must be repaired
or moved, ask a dealer or an authorized technician.
• Do not touch the heat exchanger fins. Improper handling may cause
injuries.
• If refrigerant gas leaks during installation work or operation, ventilate
the room. If refrigerant leaks into the room and comes into contact
with the flame of a heater or portable cooking range, it may ignite or
poisonous gases will be released.
• For installation work, follow the instructions in the Installation Manual
& website, and use tools and pipe components specifically made for
use with R32 refrigerant.
If pipe components not designed for R32 refrigerant are used and the
unit is not installed correctly, the pipes may burst and cause damage
or injuries. In addition, water leakage, electric shock, or fire may result.
• All electric work must be performed by a qualified technician according
to local regulations and the instructions given in this manual. The units
must be powered by dedicated power lines and the correct voltage and
circuit breakers must be used. Power lines with insufficient capacity or
incorrect electrical work may result in electric shock or fire.
• The terminal block cover panel of the outdoor unit must be firmly
attached. If the cover panel is mounted incorrectly and dust and
moisture enter the unit, electric shock or fire may result.
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• When installing or relocating, or servicing the air conditioner, use only
the specified refrigerant (R32) 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.
• If the air conditioner is installed in a small room, measures must
be taken to prevent the refrigerant concentration in the room from
exceeding the safety limit in the event of refrigerant leakage. Consult
a dealer regarding the appropriate measures to prevent the allowable
concentration from being exceeded.
Should the refrigerant leak and cause the concentration limit to be
exceeded, hazards due to lack of oxygen in the room may result.
• After installation has been completed, check for refrigerant leaks. If
refrigerant leaks into the room and comes into contact with the flame
of a heater or portable cooking range, it may ignite or poisonous gases
will be released.
• Do not reconstruct or change the settings of the protection devices.
If the pressure switch, thermal switch, or other protection device is
shorted or operated forcibly, or parts other than those specified by
Mitsubishi Electric are used, fire or explosion may result.
• To dispose of this product, consult your dealer.
• The installer and system specialist shall secure safety against
electrical leakage according to local regulation or standards. Choose
the appropriate wire size and the switch capacities for the main power
supply described in this manual if local regulations are not available.
• Pay special attention to the place of installation, such as a basement,
etc. where refrigeration gas can accumulate, since refrigerant is
heavier than the air.
• For outdoor units that allow fresh air intake to the indoor unit, the
installation site must be carefully chosen to ensure only clean air
can enter the room. Direct exposure to outdoor air may have harmful
effects on people or food.
• Do not alter the unit. It may cause fire, electric shock, injury or water
leakage.
• When opening or closing the valve below freezing temperatures,
refrigerant may spurt out from the gap between the valve stem and the
valve body, resulting in injuries.
• Pipe-work shall be protected from physical damage.
• 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
location, 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.
• The appliance shall be stored in a well-ventilated area where the room
size corresponds to the room area as specified for operation.
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• Keep gas-burning appliances, electric heaters, and other fire sources
(ignition 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
released.
• Do not smoke during work and transportation.
• For safety purposes, be sure always keep the power on, except during
maintenance.
• Install each unit in an area where the allowable space corresponding
to the amount of system refrigerant is secured. There are cases that
you need to install a SENSOR AND ALARM KIT depending on the
environment. For details, please refer to "Installation location" in the
Installation Manual.
• Refrigerant pipes must be protected against external force.