Refrigerant Piping Work; Flaring The Pipe End; Refrigerant Piping - Daikin FFQ09Q2VJU Manuel D'installation

Refrigerant Piping Work

WARNING
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 the 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.
1.

Flaring the pipe end

1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward
3)
4) Flare the pipe.
5)
2.

Refrigerant piping

CAUTION
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.)
To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
Use a torque wrench when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
a torque wrench.
Do not apply refrigeration
oil to the outer surface.
Flare nut
Do not apply refrigeration oil to
O.D. 3/8 inch (9.5mm)
Gas side
O.D. 1/2 inch (12.7mm)
Liquid side O.D. 1/4 inch (6.4mm)
English
Apply oil
Piping size Flare nut tightening torque
Cut exactly at
right angles.
Set exactly at the position shown below.
Flare tool for
A R410A
Clutch-type
0-0.020 inch
Die
A
(0-0.5mm)
surface must be
Apply refrigeration
oil only to the inner
Spanner
Piping union
Remove burrs.
Flaring
Clutch-type Wing-nut type
(Rigid-type) (Imperial-type)
0.039-0.059 inch 0.059-0.079 inch
(1.0-1.5mm) (1.5-2.0mm)
Check
The pipe end must
perfect circle.
Make sure that the
Tighten
Flare nut
14