15
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Piping installation
Installer and user reference guide
74
BS4~12A14AJV1B
VRV 5 branch selector unit
4P695527-1 – 2022.02
Description
Model
BS4A
BS6A
BS8A
BS10A
BS12A
Maximum number of connectable
indoor units per BS unit (
a
)
20
30
40
50
60
Maximum number of connectable
indoor units per BS unit branch (
b
)
5
Maximum capacity index of
connectable indoor units per BS unit
(
a
)
400
600
750
Maximum capacity index of
connectable indoor units per branch
(
b
)
140
Maximum capacity index of
connectable indoor units per branch
if 2 branches are combined (
e
)
250
Maximum capacity index of indoor
units connected to BS units in
refrigerant flow-through (
c
)
750
Maximum number of ports of BS
units in refrigerant flow-through (
c
)
16
Maximum number of indoor units
connected to BS units in refrigerant
flow-through (
c
)
64
15.2 Preparing refrigerant piping
15.2.1 Refrigerant piping requirements
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant piping.
INFORMATION
Also read the precautions and requirements in the
▪
Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
15.2.2 Refrigerant piping material
▪
Piping material:
phosphoric acid deoxidised seamless copper
▪
Piping temper grade and thickness:
