Daikin RDXYQ5T8V1B Installer And User Manual page 85

RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
Manifold
A
p < p >
B
f
i
N2 R410A
g h e
a Liquid line stop valve (circuit 1: to heat exchanger unit)
b Gas line stop valve (circuit 1: to heat exchanger unit)
c Gas line stop valve (circuit 2: to indoor units)
d Liquid line stop valve (circuit 2: to indoor units)
e Vacuum pump
f Pressure reducing valve
g Nitrogen
h Weighing scales
i Refrigerant R410A tank (siphon system)
A, B, C Valves A, B and C
D Refrigerant line splitter
2 Open valves C (on line of B) 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:
The determined additional refrigerant
amount is reached
Too much refrigerant is charged
The determined additional refrigerant
amount is not reached yet
Stage 2: Manual charging
(= charging in the "Manual additional refrigerant charge" mode)
Summary – Manual charging:
Connections
Circuit 1 and 2 together
C
c
D
A
b
C
C
a
D
B
d
C
Only circuit 1
C
A b
B a
C
Only circuit 2
C
A c
B d
C
If
Disconnect the manifold from the
liquid line(s).
You do not have to perform the
"Stage 2" instructions.
Recover refrigerant until the
determined additional refrigerant is
reached.
Disconnect the manifold from the
liquid line(s).
You do not have to perform the
"Stage 2" instructions.
Disconnect the manifold from the
liquid line(s).
Continue with the "Stage 2"
instructions.
16 Piping installation
|
Compressor unit
5 HP
b
a
c
d
RDXYQ
8 HP
b
a
c
d
RDXYQ
Then
Installer and user reference guide
85