To Remove The Spun Pipes - Daikin VRV IV Q+ Series Installer And User Reference Manual

18 | Piping installation

18.2.11 To remove the spun pipes

Installer and user reference guide
88
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
d
e
b c
a Gauge manifold
b Nitrogen
c Weighing scales
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Charge hose
g Refrigerant charge port
h Gas line stop valve
i Liquid line stop valve
j Outdoor unit
k To indoor unit
l Stop valve
m Field piping
n Gas flow
A Valve A
B Valve B
C Valve C
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).
f
j
i
g
A
B
C
k
h
l
m
n
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
RXYQQ8~20U7Y1B