Using The Stop Valve And Service Port; To Remove The Pinched Pipes - Daikin VRV W T-Series Installation Manual

5 Installation
5 .3 .9

Using the stop valve and service port

To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The figure below shows the name of each part required in
handling the stop valve.
▪ The stop valve is factory closed.
a
b
c
d
a
Service port and service port cover
b Stop valve
c Field piping connection
d Stop valve cover
e d c
a b
a Service port
b Stop valve cover
c Hexagon hole
d Shaft
e Seal
To open the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3 When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
To fully open the stop valve with a diameter of Ø3/4 inch to Ø1 inch
(Ø19.1 mm to Ø25.4 mm), turn the hexagonal wrench until a torque
between 19.9 and 24.3 ft·lbf (27.0 and 33.0 N·m) is achieved.
Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.
2
3
1
4
To close the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3 When the stop valve cannot be turned any further, stop turning.
Installation manual
22
Result: The valve is now closed.
Closing direction:
To handle the stop valve cover
▪ The stop valve cover is sealed where indicated by the arrow. Do
NOT damage it.
▪ After handling the stop valve, tighten the stop valve cover
securely, and check for refrigerant leaks. For the tightening
torque, refer to the table below.
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 Tightening torque (turn clockwise to close)
size
Valve body Hexagonal
wrench
Ø3/8 inch 3.98~4.87 5/32 inch
(Ø9.5 mm) (5.4~6.6) (4 mm)
Ø1/2 inch 5.97~7.30
(Ø12.7 mm) (8.1~9.9)
Ø5/8 inch 9.95~12.2 1/4 inch
(Ø15.9 mm) (13.5~16.5) (6 mm)
Ø3/4 inch 19.9~24.3 5/16 inch
(Ø19.1 mm) (27.0~33.0) (8 mm)
Ø1 inch
(Ø25.4 mm)
5 .3 .10

To remove the pinched pipes

NOTE
In case of heat pump mode, do NOT remove the pinched
pipe of the gas line stop valve.
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 .
VRV W T-Series water-cooled system air conditioner
Unit: ft·lbf (N·m)
Shaft
Cap Service
(valve lid) port
9.95~12.2 8.48~10.3
(13.5~16.5) (11.5~13.9)
13.3~16.2
(18.0~22.0)
17.0~19.9
(23.1~27.0)
16.6~20.3
(22.5~27.5)
RWEQ96~432TAYCU
4P540122-1B – 2018.11