Tightening Torques; To Remove The Pinched Pipes - Daikin VRV W T Serie Manual De Instalación

5 Installation
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.
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 (lbf·ft) (turn clockwise to close)
size (inch)
Valve body Hexagonal
wrench
Ø3/8 3.98~4.87 5/32 inch
Ø1/2 5.97~7.30
Ø5/8 9.95~12.16 1/4 inch
Ø3/4 19.9~24.3 5/16 inch
Ø1
Installation manual
22
Shaft
Cap Service
(valve lid) port
9.95~12.17 8.48~10.25
13.3~16.2
17.0~19.9
16.6~20.3
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 .
Use the following procedure to remove the pinched piping:
1 Remove the valve cover and make sure that the stop valves are
fully closed.
c
b
a
d
a Service port and service port cover
b Stop valve
c Field piping connection
d Stop valve cover
2 Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
p < p >
C
(1)
A B
f
a
d
N2 R410A
b c e
a Pressure reducing valve
b Nitrogen
c
Measuring instrument
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Liquid line stop valve
g Gas line stop valve
h High pressure/low pressure gas line stop valve
A Valve A
B Valve B
C Valve C
(1)
D
Valve D
(1) Only for heat recovery mode.
NOTE
Do not connect the vacuum pump to the suction gas stop
valve if the unit is intended to run in heat pump mode. This
will increase the risk of unit failure.
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 upper part of the liquid, gas, and high pressure/low
pressure gas stop valve pipes along the black line. Use an
appropriate tool (e.g. a pipe cutter, a pair of nippers).
RWEQ96~432TATJU + RWEQ96~432TAYDU
VRV W T-Series water-cooled system air conditioner
D
g
h
4P484115-1A – 2017.10