6
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Installation
Installer and user reference guide
57
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
3
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.
4
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.
Tightening torques
Stop valve size
(mm)
Tightening torque (N•m) (when opening or closing)
Valve body
Hexagonal wrench
Service port
Ø9.5
5~7
4 mm
10.7~14.7
Ø12.7
8~10
Ø15.9
14~16
6 mm
Ø19.1
19~21
8 mm
Ø25.4
6.4.11 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.
p< p>
R410A
N2
b
c
e
a
f
g
d
A
B
a
Pressure reducing valve
b
Nitrogen
c
Weighing scales
Summary of Contents for VRV IV+
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