Daikin VRV IV Series - Page 74

16 | Piping installation
Installer and user reference guide
74
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
2 Connect the vacuuming/recovery unit through a manifold to the service port
of all stop valves.
You have to recover gas and oil from all 4 pinched pipes. Depending on your
available tools, use method 1 (manifold with refrigerant line splitters required) or
method 2.
Manifold Connections Compressor unit
p
<
p
>
e
B
A
Method 1:
Connect to all service
ports at once.
C
a
b
A
c
d
B
C
C
C
D
D
RDXYQ
RDXYQ
c
c
d
d
b
b
a
a
5 HP
8 HP
Method 2:
First connect to the first 2
service ports.
C
C
bB
aA
Then connect to the last 2
service ports.
dB
c
A
C
C
a, b, c, d Service ports of stop valves
e Vacuuming/recovery unit
A, B, C Valves A, B and C
D Refrigerant line splitter
3 Recover gas and oil from the pinched piping by using a recovery unit.
CAUTION
Do NOT vent gases into the atmosphere.
4 When all gas and oil is recovered from the pinched piping, disconnect the
charge hose and close the service ports.
5 Cut off the lower part of the gas and liquid stop valve pipes along the black
line. Use an appropriate tool (e.g. a pipe cutter).