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18
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Piping installation
Installer and user reference guide
86
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
18.3.6 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.
A
B
±
3
0°
a
b
c
a
a
Horizontal surface
b
Refnet joint mounted vertically
c
Refnet joint mounted horizontally
18.3.7 To protect against contamination
Protect the piping as described in the following table to prevent dirt, liquid or dust
from entering the piping.
Unit
Installation period
Protection method
Outdoor unit
>1 month
Pinch the pipe
<1 month
Pinch or tape the pipe
Indoor unit
Regardless of the period
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.
If the gaps are not properly sealed, sound level will increase and sweat problems
can occur.
18.3.8 To braze the pipe end
NOTICE
Precautions when connecting field piping. Add brazing material as shown in the
figure.
1
1
1
1
2
2
≤Ø25.4
>Ø25.4