Leak Test And Vacuum Drying - Daikin RXYQ6BRY16 Installation Manual

10.3.2 How to use the stop valve
Opening 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.
The valve is now open.
4 Attach the stop valve cover.
1
Closing the stop valve
1
Remove the 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.
The valve is now closed.
4
Attach the stop valve cover.
10.3.3 Cautions on handling 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 "10.3.4 Tightening
torques".
Check for refrigerant leaks after tightening the
•
service port cover.
28
01_EN_3P748230-1.indd 28
2
3
4
Closing direction
10.3.4 Tightening torques
The size of the stop valve on each model and the
tightening torque for each size are listed in the table
below.
[Stop valve size (mm)]
6HP
Which 8HP 10HP 12HP
stop valve type type type type
Liquid
Ø9.5
stop valve
Gas pipe
Ø19.1 Ø25.4
stop valve
[Tightening torque]
Stop
Stop Valve
(Turn clockwise to close)
valve
Seal
size
Structure
Shaft (valve body)
(mm)
Ø9.5 5.0-7.0
Ø12.7 8.0-10.0
Front - Seal
Ø15.9 14.0-16.0
Type
+
Ø19.1
Back - Seal
19.0-21.0
Type
Ø25.4
Ø28.6 27.0-33.0

10.4 Leak test and vacuum drying

It is very important that all refrigerant piping work is done
before the units (outdoor or indoor) are powered on.
When the units are powered on, the expansion valves
will initialize.
This means that they will close. Leak test and vacuum
drying of field piping and indoor units is impossible
when this happens.
Therefore, there will be explained 2 methods for initial
installation, leak test and vacuum drying.
No
Refrigerant piping works are
finished?
Yes
The indoor units and/or
No
outdoor unit were already
powered ON?
Yes
Use procedure "10.4.3
Installation of refrigerant
piping, leak test,
vacuuming after electrical
installation is done on any
indoor or outdoor unit"
14HP 16HP 18HP 20HP 22HP 24HP
type type type type type type
Ø12.7 Ø15.9
Ø28.6
Tighten torque (N·m)
Service
port
Hexagonal
wrench 4 mm
Hexagonal
wrench 6 mm
10.7-14.7
Hexagonal
wrench 8 mm
Hexagonal
wrench 10 mm
Finish piping work
Use procedure "10.4.2
Installation of refrigerant
piping, leak test,
vacuuming before
electrical installation is
done (regular installation
method)"
23/01/2023 17:24:23