Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

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ii
Periodically check the unit base for dam-
age.

If the damage is left uncorrected, the unit will fall and
cause serious injury.
Consult your dealer for the proper disposal
of the unit.

The refrigerant oil and the refrigerant in the unit will
pose a risk of environmental pollution, fire, or explo-
sion.
Do not use means to accelerate the defrost-
ing process or to clean, other than those
recommended by the manufacturer.
The unit shall be stored in a room without
continuously operating ignition sources
(for example: open flames, an operating gas
appliance or an operating electric heater.)
Do not pierce or burn.
Be aware that refrigerants may not contain
an odour.
Install, operate, and store the unit in a space
with as much floor area as indicated in the
figure at right, and be sure to take safety
measures.
The Hydro unit shall not be installed in a
condition with certain floor area and the re-
frigerant amount as shown in the figure be-
low.
The unit shall be properly stored to prevent
mechanical damage.
0
10
20
30
40
50
60
70
80
0 50 100 150 200 250 300 350 400 450 500 550 600 650
At least two safety
measures are required.
Room volume [m
3
]
System refrigerant amount [kg]
NG (ISO 5149)
At least one safety
measure is required.
Construction guidance
Children should be supervised to ensure
that they do not play with the appliance.
Do not operate the unit with the panels and
guards removed.

Rotating, hot, or high-voltage parts may cause injury,
electric shock, or fire.
Do not touch fans, heat exchanger fins, or
the sharp edges of components with bare
hands.

Doing so may result in injury.
Wear protective gloves when working on
the unit.

Failure to do so may result in injury.

High-pressure pipes poses a risk of burns if touched
with bare hands while the unit is in operation.
Check that markings of the unit are not illeg-
ible.

Illegible warning or caution markings may cause dam-
age to the unit, resulting in injury.
If the ambient temperature can drop below
freezing while the heat-source unit is not in
use, blow the water out of the pipes or fill
them with anti-freeze solution.

Failure to do so may cause the water in the pipes to
freeze and damage the unit.

Water from burst pipes may result in water-damage to
the furnishings.
Make sure the supply-water flow rate falls
within the specified range.

Failure to maintain the adequate flow rate can result in
corrosion of the heat-source unit.

Water from corroded pipes can result in water-damage
to the furnishings.
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