To Remove The Pinched Pipes - Daikin Sky Air Advance Series Installer's Reference Manual

6 Installation
a
b
c
d
a Service port and service port cover
b Stop valve
c Field piping connection
d Dust cap
d a b
e c
a Service port
b Dust cap
c Hexagon hole
d Shaft
e Seal
▪ Do NOT apply excessive force to the stop valve. Doing so may
break the valve body.
To open/close the stop valve
1 Remove the dust cap.
2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 8 mm)
into the stop valve and turn the stop valve:
Counterclockwise to open.
Clockwise to close.
3 When the stop valve CANNOT be turned any further, stop
turning.
4 Tighten the stop valve securely when opening or closing the
stop valve. For the correct tightening torque value, refer to the
table below.
NOTICE
Inadequate torque may cause leakage of refrigerant and
breakage of the stop valve.
5 Install the dust cap.
Result: The valve is now open/closed.
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.
Installer reference guide
16
Tightening torques
Stop valve Tightening torque (N•m) (when opening or
size (mm)
Valve body
Ø9.5 5~7
Ø12.7 8~10
Ø15.9 14~16
Ø19.1 19~21
Ø25.4
6.4.7

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).
closing)
Hexagonal Service port
wrench
4 mm 10.7~14.7
6 mm
8 mm
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04