Daikin FTX-N/U - Page 185

FTX-N/U, FVXS-N, FDMQ-R Series EDUS091558E
183
3P572321-4B
6
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.
CAUTION
• Do not reuse joints which have been used once already.
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are’sinner
surfacemustbe
aw-free.
Whenaring,do
notover-tighten
andcrack.
Thepipeendmust
beevenlyaredin
aperfectcircle.
Makesurethatthe
arenutistted.
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are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are.
Do not apply refrigeration oil to
thearenuttoavoidtightening
withexcessivetorque.
Apply oil
Torquewrench
Piping union
Flare nut
Spanner
Tighten
01_EN_3P572321-4B.indd 6 2019/10/17 14:46:59