Before Installing; Before Installing (Moving) - Electrical Work; Before Starting The Trial Run - Mitsubishi Electric CITY MULTI PUMY-71 Manuel D'installation

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Use only the specified refrigerant (R-22) to charge the refriger-
ant circuit. Do not mix it with any other refrigerant and do not
allow air to remain in the circuit. Air enclosed in the circuit can
cause pressure peaks resulting in a rupture and other hazards.
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 leak-
age.
Consult the dealer regarding the appropriate measures to pre-
vent the allowable concentration from being exceeded. Should
the refrigerant leak and cause the concentration limit to be ex-
ceeded, hazards due to lack of oxygen in the room could result.
Ventilate the room if refrigerant leaks during operation.
If the refrigerant comes in contact with a flame, poisonous gases
will be released.

1.2. Before installing

Caution:
Do not install the equipment where combustible gas may leak
and accumulate resulting in fire.
Do not keep food, plants, caged pets, artwork or precision in-
struments in the indoor unit's direct airflow or too close to the
unit, as these items can be damaged by temperature changes
or dripping water.
When the room humidity exceeds 80% or when the drain pipe is
clogged, water may drip from the indoor unit. Do not install the
indoor unit where such dripping could cause damage.
The outdoor unit produces condensation during the heating op-
eration. Make sure to provide drainage around the outdoor unit
if such condensation is likely to cause damage.
This air conditioner should not be installed in areas exposed to
dense steam, volatile oil (including machine oil) or sulphuric
smoke, as this could significantly reduce its performance and
damage the internal parts.
When installing the unit in a hospital, communication station,
etc., provide sufficient protection against noise.
The air-conditioner may operate erroneously or fail to operate
because it is affected by inverter equipment, private power gen-
erator, high-frequency medical equipment or radio communica-
tions equipment. Conversely, it may affect such equipment, cre-
ating noise disturbing medical treatment or image broadcast-
ing.
1.3. Before installing (moving) - electri-
cal work
Caution:
Disconnection must be incorporated in the fixed wiring.
When installing the power lines, do not apply tension to the ca-
bles, as this could loosen the connections, generate heat and
cause a fire.
Use only a fuse of specified capacity. A fuse of larger capacity
or a steel or copper wire could cause a general unit failure or
fire.
Make sure to install an earth leakage breaker as this device helps
reduce the risk of electric shocks. Installation of an earth leak-
age breaker is mandatory in some areas.
For the power lines, use standard cables of sufficient current
capacity. Otherwise, current leakage, overheating or fire may oc-
cur.
Earth connection
Caution:
Make sure to install a grounding line. Do not connect the ground-
ing line to gas or water pipes, lightning conductors or telephone
grounding lines. Improper grounding may cause an electric shock.
Drain piping
Caution:
Install drain piping according to this Installation Manual to en-
sure proper drainage. Place thermal insulation on the pipes to
prevent condensation. Improper drain piping may cause water
leakage and damage to furniture or other possessions.
Thermal insulation of the drain pipes is necessary to prevent
dew condensation. If the drain pipes are not properly insulated,
condensation will result and drip on the ceiling, floor or other
possessions.
Miscellaneous
Caution:
Do not wash the air conditioner units. Washing them may cause
an electric shock.
Be very careful about product transportation.
One person should not carry the product alone if it is more than
20kg.
Some products use PP bands for packaging. Do not use any PP
band for a means of transportation.
Do not touch the heat exchanger fins with your bear hands. Doing
so may cut your hands.
Tear off and discard plastic packaging bags so that children will
not play with them. If children play with a plastic bag that was
not torn off, it may cause a risk of suffocation .
The base and attachments of the outdoor unit should be peri-
odically checked for looseness, cracks or other damage. If such
defects are left uncorrected, the unit may fall and cause per-
sonal injury or property damage.
Be sure to safely dispose of the packaging materials. Packag-
ing materials, such as catches and other metal or wooden parts,
may cause cuts or other injuries.

1.4. Before starting the trial run

Caution:
After completing installation work, make sure that refrigerant
gas is not leaking.
If refrigerant gas is leaked and exposed to a fan heater, stove,
oven and so on, it may generate noxious gases.
Before starting operation, check that all panels, guards and other
protective parts are correctly installed. Rotating, hot or high volt-
age parts can cause injuries.
Do not touch the refrigerant pipes with bare hands during op-
eration. The refrigerant pipes are sometimes hot and sometimes
cold depending on the condition of the flowing refrigerant. Your
hands may suffer burns or frostbite if you touch the pipes.
Turn on the main power switch more than twelve hours before
starting operation. Starting operation just after turning the main
power switch on can result in severe damage to internal parts.
Keep the main power switch turned on during the operation sea-
son.
Keep the outlets and inlets free of obstacles. Otherwise, the per-
formance may be reduced or operation may stop.
Do not touch any switch with wet fingers, as this can cause an
electric shock.
Do not operate the air conditioner without the air filter set in
place. Dust may accumulate, and cause a failure.
After stopping operation, be sure to wait for five minutes before
turning off the main power switch. Otherwise, water leakage or
unit failure may occur.
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