18
|
Piping installation
Installer and user reference guide
98
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
Tightening torques
Stop valve size
[mm]
Tightening torque [N•m]
(a)
Valve body
Hexagonal wrench
Service port
Ø9.5
5~7
4 mm
10.7~14.7
Ø12.7
8~10
Ø15.9
14~16
6 mm
Ø19.1
19~21
8 mm
Ø25.4
(a)
When opening or closing.
18.2.11 To remove the pinched pipes
WARNING
Any gas or oil remaining inside the stop valve may blow off the pinched piping.
Failure to observe the instructions in procedure below properly may result in
property damage or personal injury, which may be serious depending on the
circumstances.
Use the following procedure to remove the pinched piping:
1
Make sure that the stop valves are fully closed.
2
Connect the vacuuming/recovery unit through a manifold to the service port
of all stop valves.
a
a
b
b
a
Service port
b
Stop valve
3
Recover gas and oil from the pinched piping by using a recovery unit.
CAUTION
Do NOT vent gases into the atmosphere.
4
When all gas and oil is recovered from the pinched piping, disconnect the
charge hose and close the service ports.
5
Cut off the lower part of the liquid-, gas-, and high pressure/low pressure gas
stop valve pipes along the black line. Use an appropriate tool (e.g. a pipe
cutter).
