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User Manual - Page 8

For CDXS18LVJU.

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English
■English 7
Refrigerant Piping Work
Seetheinstallationmanualsuppliedwiththeoutdoorunit.
1. 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arenutonthepipe.
4)Flarethepipe.
5)Checkthatthearingisproperlymade.
A
A
(Cut exactly at right angles.) Remove burrs
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.
Check
0-0.02in (0-0.5mm)
0.04-0.06in (1.0-1.5mm) 0.06-0.08in (1.5-2.0mm)
Set exactly at the position shown below.
Clutch-type
Flare tool for R410A
Clutch-type (Rigid-type)
Wing-nut type (Imperial-type)
Conventional flare tool
Flaring
Die
WARNING
•Donotusemineraloilonared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aringmaycauserefrigerantgasleakage.
2. Refrigerant piping
1)Topreventgasleakage,applyrefrigerationmachineoiltotheinner
surfaceoftheare.(UserefrigerationoilforR410A)
2)Alignthecentersofbotharesandtightenthearenuts3or4turns
byhand.Thentightenthemfullywiththetorquewrenches.
•Usetorquewrencheswhentighteningthearenutstoprevent
damagetothearenutsandescapinggas.
Flarenuttighteningtorque
Gasside Liquidside
3/8inch
(9.5mm)
1/2inch
(12.7mm)
5/8inch
(15.9mm)
1/4inch
(6.4mm)
24.1-29.4ft•lbf
(32.7-39.9N•m)
36.5-44.5ft•lbf
(49.5-60.3N•m)
45.6-55.6ft•lbf
(61.8-75.4N•m)
10.4-12.7ft•lbf
(14.2-17.2N•m)
CAUTION
•Overtightening may damage the are and cause leaks.
3) After the work is nished, make sure to
check that there is no gas leak.
Torque wrench
Piping union
Flare nut
Spanner
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 to avoid tightening
with excessive torque.
4) After checking for gas leaks, be sure to insulate the pipe connections.
•Insulateusingtheinsulationforttingincludedwiththeliquidandgaspipes.Besides,makesuretheinsulationfortting
ontheliquidandgaspipinghasitsseamsfacingup.
(Tightenbothedgeswithclamp.)
•Forthegaspiping,wrapthemediumsealingpadovertheinsulationfortting(arenutpart).
Gas pipe
Liquid pipe
Piping insulation
material (main unit)
Attach to base
Flare nut connection
Turn seams up
Insulation for fitting
(accessory)
Clamp
Piping insulation material
(Field supplied)
Gas Piping Insulation Procedure
(accessory)
Main unit
Clamp (accessory)
Flare nut connection
Turn seams up
Piping insulation material
(Field supplied)
Piping insulation
material (main unit)
Attach to base
Main unit
Insulation for fitting
(accessory)
Liquid Piping Insulation Procedure
Small sealing pad
Measure the length of the gas
pipe as you will have to cover
it with the sealing tape.
(accessory)
Wrap the sealing
tape around the
gas pipe.
Main unit
01_EN_3P297301-4D.indd 7 5/8/2017 5:10:23 PM
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