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FILE NO. SVM-03008
9-3-2. Refrigerant piping connection
<Flaring>
1. Cut the pipe with a pipe cutter.
Fig. 9-3-2
2. Insert a flare nut into the pipe, and flare the pipe.
• Projection margin in flaring : A (Unit : mm)
Fig. 9-3-3
Rigid (Clutch type)
Imperial (wing nut type)
<Tightening connection>
Align the centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.
Fig. 9-3-4
CAUTION
• Do not apply excess torque.
• Otherwise, the nut may crack depending on the
conditions.
9-3. Outdoor Unit
9-3-1. 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 users 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 is up
15 m.
• An allowable height level is up to 10 m.
• A place where the drain water does not raise any
problem.
CAUTION
1. Install the outdoor unit without anything blocking
the air discharging.
2. When the outdoor unit is installed in a place
exposed always exposed to strong wind like a
coast or on a high storey of a building, secure
the normal fan operation using a duct or a wind
shield.
3. In particularly windy areas, install the unit such
as to avoid 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 as from audio equipment,
welders, and medical equipment.
Fig. 9-3-1
Strong
wind
Outer dia. R410A Conventional
of copper pipe tool used tool used
6.35 0 to 0.5 1.0 to 1.5
9.52 0 to 0.5 1.0 to 1.5
90°
Roughness
Obliquity
A
Die
Pipe
Warp
Outer dia.
R410A
of copper pipe
6.35 1.5 to 2.0
9.52 1.5 to 2.0
Flare nutHalf union
Use a wrench to secure.
Use a torque wrench to tighten.
Externally
threaded side
Internally
threaded side