Daikin FLKS60BAVMB [12/15] Refrigerant piping work
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Daikin FLKS60BAVMB [12/15] Refrigerant piping work

Daikin FLKS60BAVMB [12/15] Refrigerant piping work
■English 10
Refrigerant Piping Work
,
install as described in the installation manual supplied with the Multi outdoor unit.
1.
Flaring the pipe end.
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing down-
ward so that the chips do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.
Warning
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incomplete flaring may cause refrigerant gas leakage.
2.
Refrigerant piping.
Caution
1) Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
3) Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque
wrenches.
2-1.
Caution on Piping Handling
1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender
for bending.
With a Multi indoor unit
Set exactly at the position shown below.
A
Flaring
Die
A 0-0.5mm
Clutch-type
Flare tool for R410A
1.0-1.5mm
Clutch-type (Rigid-type)
1.5-2.0mm
Wing-nut type (Imperial-type)
Conventional flare tool
(Cut exactly at
right angles.) Remove burrs
Check
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.
Flare nut tightening torque
Gas side Liquid side
3/8 inch 1/2 inch 1/4 inch
32.7-39.9N
m 49.5-60.3N m 14.2-17.2N m
(333-407kgf
cm) (505-615kgf cm) (144-175kgf cm)
Torque wrench
Piping union
Flare nut
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 avoid
tightening with over torque.
Spanner
[Apply oil] [Tighten]
Wall
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt or water out.
Be sure to
place a cap.
Rain
01_EN_3P171284-2D.fm Page 10 Monday, August 23, 2010 2:33 PM

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