Daikin VRV 5-S Series - 19.5 Charging Refrigerant

19 | Charging refrigerant
Installer and user reference guide
97
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
19.5 To charge refrigerant
To speed up the refrigerant charging process, it is in case of larger systems
recommended to first pre-charge a portion of refrigerant through the liquid line
before proceeding with the manual charging. It can be skipped, but charging will
take longer then.
Pre-charging refrigerant
Pre-charging can be done without compressor operation, by connecting the
refrigerant bottle to the service port of the liquid stop valve.
1 Connect as shown. Make sure that all outdoor unit stop valves, as well as valve
A are closed.
p
<
p
>
N2
C
b c e
a
g
f
d
A B
R32
a Pressure reducing valve
b Nitrogen
c Weighing scales
d Refrigerant R32 tank (siphon system)
e Vacuum pump
f Liquid line stop valve
g Gas line stop valve
A Valve A
B Valve B
C Valve C
2 Open valves C and B.
3 Pre‑charge refrigerant until the determined additional refrigerant amount is
reached or pre‑charging is not possible anymore, and then close valves C and
B.
4 Do one of the following:
If Then
The determined additional refrigerant
amount is reached
Disconnect the manifold from the
liquid line.
You do not have to perform the
"Charging refrigerant (in manual
additional refrigerant charge mode)"
instructions.
Too much refrigerant is charged Recover refrigerant.
Disconnect the manifold from the
liquid line.
You do not have to perform the
"Charging refrigerant (in manual
additional refrigerant charge mode)"
instructions.