Daikin VRV 5-S - To Remove the Pinched Pipes

18 | Piping installation
Installer and user reference guide
98
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
(a)
When opening or closing.
18.2.5 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 gas and liquid stop valve pipes along the black
line. Use an appropriate tool (e.g. a pipe cutter).
WARNING
NEVER remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off the pinched piping.