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User Manual - Page 15

For FFQ09Q2VJU.

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14ŶEnglish
Refrigerant Piping Work
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WARNING
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r Prevent mineral oil from getting into the system as this would reduce the service life of the units.
r Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
r Never install a dryer to this R410A unit in order to guarantee its service life.
r The drying material may dissolve and damage the system.
r +PEQORNGVGƃCTKPIOC[TGUWNVKPTGHTKIGTCPVICUNGCMCIG
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1. Flaring the pipe end
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward
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3) 2WVVJGƃCTGPWVQPVJGRKRG
4) Flare the pipe.
5) %JGEMVJCVVJGƃCTKPIJCUDGGPFQPGEQTTGEVN[
A
A
Cut exactly at
right angles.
Remove burrs.
Flaring
Set exactly at the position shown below.
Die
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)
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surface must be
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The pipe end must
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perfect circle.
Make sure that the
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Check
2. Refrigerant piping
CAUTION
r Use the flare nut fixed to the main unit. (This is to prevent the flare nut from cracking as a result of deterioration over time.)
r To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
r Use a torque wrench when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
r #NKIPVJGEGPVGTUQHDQVJƃCTGUCPFVKIJVGPVJGƃCTGPWVUQTVWTPUD[JCPFVJGPVKIJVGPVJGOHWNN[YKVJCURCPPGTCPF
a torque wrench.
Do not apply refrigeration
oil to the outer surface.
Flare nut
Apply refrigeration
oil only to the inner
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Do not apply refrigeration oil to
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Apply oil
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Piping union
Flare nut
Spanner
Tighten
Piping size Flare nut tightening torque
Gas side
O.D. 3/8 inch (9.5mm) s+DHrHV0rO
O.D. 1/2 inch (12.7mm) s+DHrHV0rO
Liquid side O.D. 1/4 inch (6.4mm) s+DHrHV0rO
English
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