Using The Stop Valve And Service Port - Daikin RXP25N5V1B Installer's Reference Manual

7.2.6 Using the stop valve and service port

To handle the stop valve
RXP20~35N5V1B+ARXP20~35N5V1B
R32 split series
4P519439-22V – 2022.10
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
Do NOT open the valves before flaring is complete. This would cause refrigerant gas
leakage.
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.
a
b
c
d
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.
▪ ALWAYS make sure to secure the stop valve with a spanner, then loosen or
tighten the flare nut with a torque wrench. Do NOT place the spanner on the
stem cap, as this could cause a refrigerant leak.
a
b
Conventional flare tool
Clutch type
(Ridgid-type)
1.0~1.5 mm
b
c
7 Piping installation
|
Wing nut type
(Imperial-type)
1.5~2.0 mm
Installer reference guide
37