7
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Piping installation
Installer reference guide
39
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1C – 2020.08
7.2.5 To flare the pipe end
CAUTION
▪
Incomplete flaring may cause refrigerant gas leakage.
▪
Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
▪
Use flare nuts that are included with the unit. Using different flare nuts may
cause refrigerant gas leakage.
1
Cut the pipe end with a pipe cutter.
2
Remove burrs with the cut surface facing down so that the chips do NOT enter
the pipe.
a
b
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)
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.
7.2.6 Connections between outdoor and indoor unit using reducers
INFORMATION
▪
For the DHW generator for Multi use the same reducer as for the 20 class indoor
unit.
▪
For the Hybrid for Multi, see the indoor unit installation manual for the capacity
class and applicable reducer.
Total indoor unit capacity class that can be connected to this outdoor unit:
Outdoor unit
Total indoor unit capacity class
2MXM68
≤10.2 kW
3MXM40
≤7.0 kW
