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17
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Piping installation
17.2.6 To connect the refrigerant piping to the indoor unit
Installer and user reference guide
62
a
a Cut exactly at right angles.
b Remove burrs.
3 Remove the flare nut from the stop valve and put the flare nut on the pipe.
4 Flare the pipe. Set exactly at the position as shown in the following figure.
A
Flare tool for R32
(clutch type)
A
0~0.5 mm
5 Check that the flaring is properly made.
a
a Flare's inner surface MUST be flawless.
b The pipe end MUST be evenly flared in a perfect circle.
c Make sure the flare nut is fitted.
CAUTION
Install the refrigerant piping or components in a position where they are unlikely to
be exposed to any substance which may corrode components containing refrigerant,
unless the components are constructed of materials that are inherently resistant to
corrosion or are suitably protected against corrosion.
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
▪
Pipe length. Keep refrigerant piping as short as possible.
▪
Flare connections. Connect refrigerant piping to the unit using flare connections.
▪
Insulation. Insulate the refrigerant piping on the indoor unit as follows:
A
B
A Gas piping
B Liquid piping
a Insulation material (field supply)
b
Clutch type
(Ridgid-type)
1.0~1.5 mm
b
c
A
a
b
c
d
b
e f
a
b
3
2
1
1
g
4
Conventional flare tool
Wing nut type
(Imperial-type)
1.5~2.0 mm
B
c
d
b
e f
3
2
g
4
VRV system air conditioner
4P747548-2 – 2023.11
FXKA-A
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