8
90°
A
Die
Pipe
Refrigerant Piping Connection
1. Cut the pipe with a pipe cutter.
2. Insert a
fl
are nut into the pipe and
fl
are the pipe.
•
Projection margin in
fl
aring : A (Unit : mm)
Rigid (clutch type)
Imperial (wing nut type)
Outer dia. of copper pipe
R410A
Ø6.35
1.5 to 2.0
Ø12.70
2.0 to 2.5
Outer dia.
of copper pipe
R410A tool used
Conventional tool
used
Ø6.35
0 to 0.5
1.0 to 1.5
Ø12.70
0 to 0.5
1.0 to 1.5
Flaring
Obliquity
Roughness
Warp
Installation Place
• A place which provides the spaces around the outdoor unit as shown in
the 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.
• A place where the drain water does not raise any problems
CAUTION
1. Install the outdoor unit without anything blocking the air discharging.
2. When the outdoor unit is installed in a place 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 windshield.
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 sul
fi
de gas
• A place where high-frequency
waves are likely to be generated
as from audio equipment, welders,
and medical equipment
Strong
wind
Incused line
Flare at hydro
unit side
Flare at outdoor
unit side
Flare nut
Half union
Externally
threaded side
Internally
threaded side
Use a wrench to secure.
Use a torque wrench to tighten.
CAUTION
Align the centers of the connecting pipes and tighten the
fl
are nut as far as
possible with your
fi
ngers. Then tighten the nut with a spanner and torque
wrench as shown in the
fi
gure.
Tightening connection
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
(Unit : N·m)
Outer dia. of copper pipe
Tightening torque
Ø6.35 mm
14 to 18 (1.4 to 1.8 kgf·m)
Ø12.70 mm
50 to 62 (5.0 to 6.2 kgf·m)
•
Tightening torque of
fl
are pipe connections
The operating pressure of R410A
is higher than that of R22 (approx.
1.6 times). It is therefore necessary
to
fi
rmly tighten the
fl
are pipe
connecting sections (which connect
the hydro and outdoor units) up to the
speci
fi
ed tightening torque. Incorrect
connections may cause not only a
gas leakage, but also damage to the
refrigeration cycle.
1. How to shape the pipes
Shape the pipes along the incused line on
the outdoor unit.
2. How to
fi
t position of the pipes
Put the edges of the pipes to the place with
a distance of 85 mm from the incused line.
Shaping pipes
Refrigerant pipe
H: max. ±10 m (above / below)
L: max. 15 m, min 5 m
15 m chargeless
Hydro Unit
Outdoor unit
15 m chargeless
L
H
Refrigerant pipe length
01_1120551201-1 EN.indd 8
01_1120551201-1 EN.indd 8
5/18/2560 BE 3:12 PM
5/18/2560 BE 3:12 PM
