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17.2.6 To connect the refrigerant piping to the indoor unit
FXKQ-A
VRV system air conditioner
4P747548-1 – 2023.11
A
Flare tool for R410A
(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.
▪
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
A
B
A Gas piping
B Liquid piping
a Insulation material (field supply)
b Tie wrap (accessory)
c Insulation pieces: Large (gas pipe), small (liquid pipe) (accessories)
d Flare nut (attached to the unit)
e Refrigerant pipe connection (attached to the unit)
f Unit
g Sealing pads: Medium (gas pipe), Small (liquid pipe) (accessories)
1 Turn up the seams of the insulation pieces.
2 Attach to the base of the unit.
3 Tighten the tie wrap on the insulation pieces.
4 Wrap the sealing pad from the base of the unit to the top of the flare nut.
Conventional flare tool
Clutch type
(Ridgid-type)
1.0~1.5 mm
b
c
A
b
c
d
b
e f
a
b
3
2
1
1
g
4
17
Piping installation
|
Wing nut type
(Imperial-type)
1.5~2.0 mm
B
c
d
b
e f
3
2
g
4
Installer and user reference guide
57
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