Pipe Bending Guidelines; To Remove The Spun Pipes - Daikin VRV 5 S Series Installer And User Manual

18 | Piping installation

18.2.3 Pipe bending guidelines

18.2.4 To remove the spun pipes

Installer and user reference guide
86
Unit
Outdoor unit >1 month
<1 month
Indoor unit Regardless of the period
NOTICE
Do NOT open the refrigerant stop valve before checking the refrigerant piping. When
you need to charge additional refrigerant it is recommended to open the refrigerant
stop valve after charging.
Use a pipe bender for bending. All pipe bends should be as gentle as possible
(bending radius should be 30~40 mm or larger).
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
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).
Installation period
a
b
Protection method
Pinch the pipe
Pinch or tape the pipe
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02