Installation Manual
EDUS041016
42
Room Air Conditioners J-Series
6
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
• Do not use mineral oil on flared part.
• Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
• Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
• Never install a drier to this R410A unit in order to guarantee its lifetime.
• The drying material may dissolve and damage the system.
• Incomplete flaring may cause refrigerant gas leakage.
4.
Refrigerant piping
CAUTION
• Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
• To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches.
A
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.
(Cut exactly at
right angles.)
Remove burrs.
Flaring
Set exactly at the position shown below.
A
0-0.020 inch
(0-0.5mm)
Clutch-type
Flare tool for R410A
0.039-0.059 inch
(1.0-1.5mm)
Clutch-type (Rigid-type)
0.059-0.079 inch
(1.5-2.0mm)
Wing-nut type (Imperial-type)
Conventional flare tool
Die
Flare nut tightening torque
Gas side
Liquid side
3/8 inch (9.5mm)
1/4 inch (6.4mm)
24.1-29.4ft
lbf
10.4-12.7ft lbf
(32.7-39.9N m)
(14.2-17.2N m)
Valve cap tightening torque
Gas side
Liquid side
3/8 inch (9.5mm)
1/4 inch (6.4mm)
15.9-20.2ft
lbf
15.9-20.2ft lbf
(21.6-27.4N m)
(21.6-27.4N m)
Service port cap
7.9-10.8ft lbf
tightening torque
(10.8-14.7N m)
Torque wrench
Piping union
Flare nut
Spanner
[Tighten]
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.
[Apply oil]
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Summary of Contents for J Series
Page 1: ...EDUS041016 J Series Cooling Only Heat Pump SEER 13 Models ...
Page 53: ...Operation Manual EDUS041016 52 Room Air Conditioners J Series 12 2 Operation Instructions ...
Page 54: ...EDUS041016 Operation Manual Room Air Conditioners J Series 53 ...
Page 55: ...Operation Manual EDUS041016 54 Room Air Conditioners J Series ...
Page 56: ...EDUS041016 Operation Manual Room Air Conditioners J Series 55 ...
Page 57: ...Operation Manual EDUS041016 56 Room Air Conditioners J Series ...
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