Installation Location - Mitsubishi Electric PUD-SWM AA Serie Installationshandbuch

2. Installation location

D
en
OK
OK
5
A
B
E
C
Fig. 2-1
OK
NG
Fig. 2-2
Fig. 2-3
2.1. Refrigerant pipe (Fig. 2-1)
► Check that the difference between the heights of the indoor and outdoor
units, the length of refrigerant pipe, and the number of bends in the pipe
are within the limits shown below.
A Pipe length
Model
SWM60 - 120
SHWM60 - 120
SHWM140
• Height difference limitation is defined regardless of which unit, indoor or outdoor,
is positioned higher.
D Indoor unit
E Outdoor unit
2.2. Choosing the outdoor unit installation location
/ R32 is heavier than air—as well as other refrigerants—so tends to accumulate
at the base (in the vicinity of the floor). If R32 accumulates around base, it may
reach a flammable concentration in case room is small. To avoid ignition, main-
taining a safe work environment is required by ensuring appropriate ventilation. If
a refrigerant leak is confirmed in a room or an area where there is insufficient ven-
tilation, refrain from using of flames until the work environment can be improved
by ensuring appropriate ventilation.
• Avoid locations exposed to direct sunlight or other sources of heat.
• Select a location from which noise emitted by the unit will not inconvenience
neighbors.
• Select a location permitting easy wiring and pipe access to the power source and
indoor unit.
• Avoid locations where combustible gases may leak, be produced, flow, or ac-
cumulate.
• Note that water may drain from the unit during operation.
• Select a level location that can bear the weight and vibration of the unit.
• Avoid locations where the unit can be covered by snow. In areas where heavy
snow fall is anticipated, special precautions such as raising the installation loca-
tion or installing a hood on the air intake must be taken to prevent the snow from
blocking the air intake or blowing directly against it. This can reduce the airflow
and a malfunction may result.
• Avoid locations exposed to oil, steam, or sulfuric gas.
• Use the transportation handles of the outdoor unit to transport the unit. If the unit
is carried from the bottom, hands or fingers may be pinched.
• Refrigerant pipes connection shall be accessible for maintenance purposes.
/ Install outdoor units in a place where at least one of the four sides is open, and in
a sufficiently large space without depressions. (Fig. 2-2)
CAUTION:
(mm)
• Perform grounding.
Do not connect the ground wire to a gas pipe, water
pipe arrester or telephone ground wire. Defective
grounding could cause an electric shock.
• Do not install the unit in a place where an inflam-
mable gas leaks.
If gas leaks and accumulates in the area surround-
ing the unit, it could cause an explosion.
• Install a ground leakage breaker depending on the
installation place (where it is humid).
If a ground leakage breaker is not installed, it could
cause an electric shock.
• Perform the drainage/piping work securely accord-
ing to the installation manual.
If there is a defect in the drainage/piping work, wa-
ter could drop from the unit and household goods
could be wet and damaged.
• Fasten a flare nut with a torque wrench as specified
in this manual.
When fastened too tight, a flare nut may be broken
after a long period and cause a leakage of refrigerant.
2.3. Outline dimensions (Outdoor unit) (Fig. 2-3)
B Height
(one way) difference
2 m - 30 m Max. 30 m
2 m - 30 m Max. 30 m
2 m - 25 m Max. 25 m
C Number of bends
(one way)
Max. 10
Max. 10
Max. 10