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10-4. Outdoor Unit
10-4-1. Installation place
• A place which provides the spaces around the
outdoor unit as shown in the left diagram.
• A place which can bear the weight of the outdoor
unit and does not allow an increase in noise level
and vibration.
• A place where the operation noise and discharged
air do not disturb your neighbors.
• A place which is not exposed to a strong wind.
• A place free of a leakage of combustible gases.
• A place which does not block a passage.
• When the outdoor unit is to be installed in an
elevated position, be sure to secure its feet.
• An allowable length of the connecting pipe
up to 20 m.
• There is no need to add refrigerant as long as the
length of the connection piping 15 m or less.
• You will need to add 20g of refrigerant per meter
of added connection piping for installations requiring
connection piping to be between 16 m to 20 m.
• An allowable height level is up to 10 m.
• Aplace where the drain water does not cause
any problems.
10-4-2. Precautions about Installation in Regions
with Snowfall and Cold Temperatures
• Do not use the supplied drain nipple for draining water.
Drain the water from all the drain holes directly.
• To protect the outdoor unit from snow accumulation,
install a holding frame, and attach a snow protection
hood and plate.
• Do not use a double-stacked design.
Snow protection plate
Front
Snow protection hood
Snow accumulation line
Anchor
bolts
Fig. 10-4-1
Install at least 50 cm
above the snow
accumulation line.
At least
50 cm
Holding frame
CAUTION
1. Insall the outdoor unit in a location where there are
no obstructions near its air intake or air outlet.
2. When the outdoor unit is installed in a place that
is always exposed to strong wind like on the coast
or on a high story of a building, secure the normal
fan operation using a duct or a wind shield.
3. Especially in windy areas, insall the unit to
prevent the admission of wind.
4. Installation in the following places may result in
trouble.
Do not install the unit in such places.
• A place full of machine oil.
• A saline-place such as the coast.
• A place full of sulfide gas.
• A place where high-frequency waves are likely
to be generated, such as from audio equipment,
welders, and medical equipment.
10-4-3. Refrigerant piping connection
<Flaring>
1. Cut the pipe with a pipe cutter.
2. Insert a flare nut into the pipe, and flare the pipe.
• Projection margin in flaring : A (Unit : mm)
Rigid (cluch type)
Outer dia.
of copper pipe
∅ 6.35
∅ 12.70
– 59 –
FILE NO. SVM-12071
Strong
wind
Fig. 10-4-2
Obliquity
90°
Fig. 10-4-3
Rigid
0 to 0.5
0 to 0.5
Die
Pipe
Fig. 10-4-4
Roughness
Warp
A
Imperial
1.0 to 1.5
1.0 to 1.5
A
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