5
English
Outdoor Unit Installation
3.
Flaring the pipe end.
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing
downward so that the chips do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.
WARNING
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incomplete flaring may cause refrigerant gas leakage.
4.
Refrigerant piping.
CAUTION
1) Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
3) Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches.
(Cut exactly at
right angles.)
Remove burrs
Set exactly at the position shown below.
A
Flaring
Die
Check
Flare’s inner
surface must
be flaw-free.
The pipe end must
be evenly flared in
a perfect circle.
Make sure that the
flare nut is fitted.
A
0-0.5mm
Clutch-type
Flare tool for R410A
1.0-1.5mm
Clutch-type (Rigid-type)
1.5-2.0mm
Wing-nut type (Imperial-type)
Conventional flare tool
Torque wrench
Piping union
Flare nut
Flare nut tightening torque
Gas side
Liquid side
3/8 inch
1/4 inch
32.7-39.9N • m
14.2-17.2N • m
(333-407kgf • cm)
(144-175kgf • cm)
Valve cap tightening torque
Gas side
Liquid side
3/8 inch
1/4 inch
21.6-27.4N • m
21.6-27.4N • m
(220-280kgf • cm)
(220-280kgf • cm)
Service port cap
10.8~14.7N • m
tightening torque
(110~150kgf • cm)
Do not apply refrigeration
oil to the outer surface.
Flare nut
Apply refrigeration oil to
the inner surface of the
flare.
Do not apply refrigeration
oil to the flare nut avoid
tightening with over torque.
Spanner
[Apply oil]
[Tighten]
Summary of Contents for ARXN25N5V1B9
Page 2: ......
Page 62: ...1 R410A...
Page 63: ...2 70 A A 1 1 B...
Page 64: ...3 1 2 3 4 5 6 7 3 3 8 9 1 2 3 4...
Page 65: ...4 1 5 20 250 9 5 6 4 20 10 20 10 1 5 1 5 470 96 300...
Page 66: ...5 1200 8 10 20 1 1 2 2 1 2 30 3 50 100 1200 50 50 100 150 300 50 150 20 16...
Page 68: ...7 5 1 R410A 2 3 R410A 4 R410A 4 1 2 Lo Hi 3 0 1 76 1 4 Lo 2 5 6 90 5 7 8...
Page 69: ...8 1 2 2 4 6 R410A 1 R410A 20 10 R410A GWP 2087 5 GWP R410A...
Page 71: ...10 1 2 3 4 3 5 1 20 2 1 2 3 1 2 3 L N 16 10 2 0 H05RN 50 220 240 2 0 1 2 3 1 2 3 1 3 A B A B...
Page 73: ...12 1 1 1 1 2 1 2 26 C 28 C 20 C 24 C 3 3 1 2 26 C 28 C 3 3 1 3 2...
Page 86: ...11 1 1 1 2 1 1 24 20 28 26 2 3 3 1 28 26 2 3 3 3 1 2 RC...
Page 88: ...1 2 3 1 2 3 L N 16 10 2 0 H05RN 2 0 1 2 3 1 2 3 l 1 3 A B A B 9 1 2 3 4 5 1 2 50 240 220...
Page 89: ...8 1 1 2 3 15 1 2 3 4 30 1 2...
Page 91: ...5 6 R410A a b R410A c R410A d 1 2 MPa 76cmHg 10 1 3 4 2 5 90 6 5 7 8 1 2 4 20 10...
Page 93: ...100 1200 20 16 4 1200 50 50 50 100 150 150 300 50 M10 M8 20 1 1 2 2 1 2 3 3 1 2 3 4 5...
Page 94: ...O D 9 5 20 20 470 96 300 3 1 5 10 10 O D 6 4 1 5 20...
Page 95: ...dB A 70 1 2 3 4 5 6 7 8 9 1 2 3 4 2...
Page 96: ...8 R410A 1...
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