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User Manual - Page 7

For 1309406.

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6■English
3. Flaring the pipe end
WARNING
• Donotapplymineraloiltotheare.
• Prevent mineral oil from getting into the system as this would reduce the service life of the units.
• Never use piping which has been used for previous installations. Only use parts which are delivered with this unit.
• Never install a dryer to this R410A unit in order to guarantee its service life.
• The drying material may dissolve and damage the system.
• Incompletearingmayresultinrefrigerantgasleakage.
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing
downward,sothatthelingsdonotenterthe
pipe.
3) Putthearenutonthepipe.
4) Flare the pipe.
5) Checkthatthearinghasbeendonecorrectly.
Check
The 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.
Set exactly at the position shown below.
Flaring
A
Die
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
Cut exactly at
right angles.
Remove burrs.
4. Refrigerant piping
CAUTION
• Usethearenutxedtothemainunit.(Thisistopreventthearenutfromcrackingasaresultofdeteriorationovertime.)
• Topreventgasleakage,applyrefrigerationoilonlytotheinnersurfaceoftheare.(UserefrigerationoilforR410A.)
• Useatorquewrenchwhentighteningthearenutstopreventdamagetothearenutsandgasleakage.
• Alignthecentersofbotharesandtightenthearenuts3or4turnsbyhand,thentightenthemfullywithaspanneranda
torque wrench.
Do not apply refrigeration
oil to the outer surface.
Flare nut
Apply refrigeration
oil only to the inner
surface of the flare.
Do not apply refrigeration oil to
the flare nut to avoid tightening
with excessive torque.
Apply oil
Flare nut tightening torque
Gas side
5/8 inch (15.9mm)
45-5/8 – 55-5/8Ibf • ft
(61.8-75.4N • m)
10-1/2 – 12-3/4Ibf • ft
(14.2-17.2 N • m)
Liquid side
1/4 inch (6.4mm)
Service port cap tightening torque
8 – 10-7/8lbf • ft (10.8-14.7N • m)
1-3/16 inch (30mm)
(22.5-27.5N • m)
16-5/8 – 20-1/4Ibf • ft
11/16 inch (17mm)
(14.2-17.2N • m)
10-1/2 – 12-5/8lbf • ft
Width across flats
Valve cap
tightening torque
English
01_EN_3P457793-1.indd 6 11/22/2016 10:46:28 AM
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