To Connect The Refrigerant Piping To The Outdoor Unit; To Connect The Multi Connection Piping Kit; To Connect The Refrigerant Branching Kit; To Protect Against Contamination - Daikin RWEYQ8T9Y1B Installation And Operation Manual

5 Installation
5.3.2 To connect the refrigerant piping to the
outdoor unit
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
▪ Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel. Especially
for the bottom and side connection, be sure to protect
the piping with suitable insulation, to prevent it from
coming into contact with the casing.
Connect the stop valves to the field piping using the accessory pipes
supplied with the unit.
The connections to the branch kits are the responsibility of the
installer (field piping).
5.3.3

To connect the multi connection piping kit

NOTICE
Improper installation may lead to malfunction of the
outdoor unit.
▪ Install the joints horizontally, so that the caution label (a) attached
to the joint comes to the top.
▪ Do not tilt the joint more than 7.5° (see view A).
▪ Do not install the joint vertically (see view B).
7.5°
A
7.5°
a
a Caution label
X Not allowed
O Allowed
▪ Make sure that the total length of the piping connected to the joint
is absolute straight for more than 500 mm. Only if a straight field
piping of more than 120 mm is connected, more than 500 mm of
straight section can be ensured.
5.3.4

To connect the refrigerant branching kit

For installation of the refrigerant branching kit, refer to the installation
manual delivered with the kit.
▪ Mount the refnet joint so that it branches either horizontally or
vertically.
▪ Mount the refnet header so that it branches horizontally.
Installation and operation manual
14
b
5.3.5
Seal the piping and wiring intake holes using sealing material (field
supply), otherwise the capacity of the unit will drop and small
animals may enter the machine.
5.3.6
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
B
▪ The stop valve is factory closed.
To open the stop valve
a
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 Ø19.1 mm~Ø25.4 mm stop valve, turn the
hexagonal wrench until a torque between 27 and 33 N•m is
achieved.
Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.
1
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:
c
a
A
a
B
a Horizontal surface
b Refnet joint mounted vertically
c Refnet joint mounted horizontally

To protect against contamination

Using the stop valve and service port

2
3
4
RWEYQ8~14T9V1B+RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452190-1A – 2017.04