Daikin VRV 5 RXYA8A7Y1B, Инструкция по установке и эксплуатации

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18 | Piping installation
Installer and user reference guide
110
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
18.2.11 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
d
a
a Horizontal surface
b Refnet joint mounted vertically
c Refnet joint mounted horizontally
d Header
18.3 Checking the refrigerant piping
18.3.1 About checking the refrigerant piping
Refrigerant piping works are
finished?
The indoor units / SV units /
outdoor unit are already
powered ON?
Use procedure:
"Method 2: after power ON"
Finish piping work
Use procedure:
"Method 1: Before power ON
(regular method)"
Yes
Yes
No
No
It is very important that all refrigerant piping work is done before the units
(outdoor, SV unit or indoor) are powered on. When the units are powered on, the
expansion valves will initialise. This means that the valves will close.
NOTICE
Leak test and vacuum drying of field piping, SV units and indoor units is impossible
when field expansion valves are closed.
Method 1: Before power ON
If the system has not yet been powered on, no special action is required to
perform the leak test and the vacuum drying.