Daikin CDX25AVMA [165/268] Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas 2 to prevent gas leakage apply refrigeration machine oil on both inner and outer surfaces of the flare
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Daikin CDX25AVMA [165/268] Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas 2 to prevent gas leakage apply refrigeration machine oil on both inner and outer surfaces of the flare

Daikin CDX25AVMA [165/268] Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas 2 to prevent gas leakage apply refrigeration machine oil on both inner and outer surfaces of the flare
Indoor Units ED12-321A
160 Installation Manual
REFRIGERANT PIPING WORK
See the installation manual supplied with the Multi outdoor unit
for 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 flare nut on the pipe.
4. Flare the pipe.
5. Check that the flaring is properly made.
Incomplete flaring may cause refrigerant gas leakage.
Warning
2
REFRIGERANT PIPING
1. 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.
●
Use torque wrenches when tightening the flare nuts
to prevent damage to the flare nuts and escaping gas.
2. To prevent gas leakage, apply refrigeration machine oil
on both inner and outer surfaces of the flare.
●
Wrap only the gas line side with the sealing pad. Bend the pad over the insulation for fitting (union) from above.
(Cut exactly at
right angles.)
Remove burrs
Set exactly at the position shown below.
A
IMPERIAL
RIGID
1.0 mm
0.5 mm
Flaring
A
Die
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.
Coat here with
refrigeration machine oil
Torque wrench
Piping union
Flare nut
Spanner
Insulation for fitting
(attached)
(For gas pipe)
Large sealing pad
(attached)
Gas pipe
Liquid pipe
Insulation for fitting
(attached)
(For liquid pipe)
Small sealing pad
(attached)
Flare nut tightening torque
Gas side Liquid side
3/8 inch 1/2 inch 5/8 inch 1/4 inch
32.7~39.9N•m 49.5~60.3N•m 61.8~75.4N•m 14.2~17.2N•m
(333~407kgf
•
cm) (505~615kgf
•
cm) (630~769kgf
•
cm) (144~175kgf
•
cm)
Service port cap tightening torque
10.8~14.7N•m (110~150kgf•cm)
Valve cap tightening torque
Gas side Liquid side
3/8 inch 1/2 inch 5/8 inch 1/4 inch
21.6~27.4N•m 26.5~32.3N•m 48.1~59.7N•m 21.6~27.4N•m
(220~280kgf
•
cm) (270~330kgf
•
cm) (490~610kgf
•
cm) (220~280kgf•cm)

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