Daikin VRV W T-series - Daily Patterns

5 Installation
Installation manual
22
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
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.
c
d
a
b
a Service port and service port cover
b Stop valve
c Field piping connection
d Stop valve cover
a b
cde
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.
1
2
3
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.
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
Unit: ft·lbf (N·m)
Stop valve
size
Tightening torque (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
Cap
(valve lid)
Service
port
Ø3/8 inch
(Ø9.5 mm)
3.98~4.87
(5.4~6.6)
5/32 inch
(4 mm)
9.95~12.2
(13.5~16.5)
8.48~10.3
(11.5~13.9)
Ø1/2 inch
(Ø12.7 mm)
5.97~7.30
(8.1~9.9)
13.3~16.2
(18.0~22.0)
Ø5/8 inch
(Ø15.9 mm)
9.95~12.2
(13.5~16.5)
1/4 inch
(6 mm)
17.0~19.9
(23.1~27.0)
Ø3/4 inch
(Ø19.1 mm)
19.9~24.3
(27.0~33.0)
5/16 inch
(8 mm)
16.6~20.3
(22.5~27.5)
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.