Specifications

Installation and operation manual
18
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
7 Cut the pinched piping off with a pipe cutter just above the
brazing point or marking if there is no brazing point.
8 Wait until all oil is dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
10.2.3. Connecting refrigerant piping to the outdoor unit
Connection from the stop valves to the field piping can be done by
using accessory pipes supplied as accessory.
The connections to the branch kits are the responsibility of the
installer (field piping).
10.2.4. Branching the refrigerant piping
 For installation of the refrigerant branching kit, refer to the
installation manual delivered with the kit.
1 Horizontal surface
1 Mount the refnet joint so that it branches either horizontally or
vertically.
2 Mount the refnet header so that it branches horizontally.
 Installation of the multi connection piping kit.
1 Install the joints horizontally, so that the caution label (1)
attached to the joint comes to the top.
- Do not tilt the joint more than 15° (see view A).
- Do not install the joint vertically (see view B).
2 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.
3 Improper installation may lead to malfunction of the outdoor
unit.
WARNING
Never remove the pinched piping by
brazing.
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.
INFORMATION
All local inter unit piping are field supplied except the
accessory pipes.
NOTICE
Precautions when connecting field piping. Add brazing
material as shown in the figure.
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.
NOTICE
Make sure that the onsite piping does not come in contact
with other piping, the bottom frame or side panels of the
unit.
1
1
1
1
22
 !
A
B
±
3
0
°
1
1
A
1
max
15
B
1
>120 mm
>500 mm