18
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Piping installation
Installer and user reference guide
84
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
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
Ø15.9
13.5~16.5
6 mm
22.5~27.5
18.2.6 To remove the spun pipes
WARNING
Any gas or oil remaining inside the stop valve may blow off the spun piping.
If these instructions are NOT followed correctly it may result in property damage or
personal injury, which may be serious depending on the circumstances.
Use the following procedure to remove the spun 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 spun piping by using a recovery unit.
CAUTION
Do not vent gases into the atmosphere.
4
When all gas and oil is recovered from the spun piping, disconnect the charge
hose and close the service ports.
5
Cut off the lower part of the gas and liquid stop valve pipes along the black
line. Use an appropriate tool (e.g. a pipe cutter).
Summary of Contents for VRV 5-S Series
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