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Piping installation
Installer and user reference guide
73
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
c
d
a
b
a
Service port and service port cover
b
Stop valve
c
Field piping connection
d
Stop valve cover
a
b
c
d
e
a
Service port
b
Stop valve cover
c
Hexagon hole
d
Shaft
e
Valve seat
▪
Do NOT apply excessive force to the stop valve. Doing so may break the valve
body.
To handle the service port
▪
Always use a charge hose equipped with a valve depressor pin, since the service
port is a Schrader type valve.
▪
After handling the service port, make sure to tighten the service port cover
securely. For the tightening torque, refer to the table below.
▪
Check for refrigerant leaks after tightening the service port cover.
Tightening torques
Stop valve size
(mm)
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body
Hexagonal
wrench
Cap (valve lid)
Service port
Ø9.5
5.4~6.6
4 mm
13.5~16.5
11.5~13.9
Ø12.7
8.1~9.9
18.0~22.0
Ø19.1
27.0~33.0
8 mm
22.5~27.5
16.2.6 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.
