7
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Piping installation
Installer reference guide
34
(A)RXF20~42C5V1B
R32 split series
4P519439-10J – 2021.06
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 Using the stop valve and service port
CAUTION
Do NOT open the valves before flaring is complete. This would cause refrigerant gas
leakage.
To handle the stop valve
Take the following guidelines into account:
▪
The stop valves are factory closed.
▪
The following figure shows the stop valve parts required when handling the
valve.
c
d
a
b
a
Service port and service port cap
b
Valve stem
c
Field piping connection
d
Stem cap
▪
Keep both stop valves open during operation.
▪
Do NOT apply excessive force to the valve stem. Doing so may break the valve
body.
