17
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Piping installation
Installer and user reference guide
64
FXUA50~100AVEB
VRV system air conditioner
4P673843-1 – 2022.01
A
Flare tool for R32
(clutch type)
Conventional flare tool
Clutch type
(Ridgid-type)
Wing nut type
(Imperial-type)
A
0~0.5 mm
1.0~1.5 mm
1.5~2.0 mm
5
Check that the flaring is properly made.
a
b
c
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.
17.2.6 To connect the refrigerant piping to the indoor unit
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.
▪
Refrigerant piping can be connected from 3 directions.
In case of
upward piping
, remove the pipe port cover and cut out the holes for
piping. After leading the piping through the holes, reattach the pipe port cover.
a
b
c
e
d
a
Electric wiring
b
Pipe port cover
c
Gas
d
Liquid
e
Drain
For rear and right piping outlet, cut the piping opening before mounting the
corner covers. See
"19.1 To mount the corner cover"
72].
▪
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:
