16 Configuration
Installation and operation manual
34
BS4~12A14AJV1B
VRV 5 branch selector unit
4P670163-1 – 2022.02
Example
When joining branch pipe ports A and B.
ON
DS2 (A1P)
OFF
1 2 3 4
Examples
1.
When connecting an indoor unit to branch pipe
ports A, B, and D, but NOT connecting an indoor
unit to branch pipe port C.
ON
DS1 (A1P)
OFF
1 2 3 4
ON
DS2 (A1P)
OFF
1 2 3 4
2.
When joining branch pipe ports A and B.
Connecting an indoor unit to the joined branch
pipe ports A and B, also to branch pipe port C, but
NOT connecting an indoor unit to branch pipe
port D.
ON
DS1 (A1P)
OFF
1 2 3 4
ON
DS2 (A1P)
OFF
1 2 3 4
15.5
To connect the external outputs
FAN output (extraction fan)
The extraction FAN output is a contact on terminal X6M that closes
in case a leak is detected, or when there is a failure or disconnection
of the R32 sensor in the BS unit.
The FAN output must be used when a ventilated enclosure is
required
(see
14]).
b
FAN SVS
1
1 2
2
X6M
a
a
FAN output terminals (1 and 2)
b
Cable to extraction fan circuit
Selection and sizing of the wiring must be in accordance with the
applicable legislation based on the information in the notice below:
NOTICE
The FAN output has a limited capacity of 220~240 V AC –
0.5 A.
Do NOT use the FAN output to directly power the fan.
Instead, use the output to energize a relay that controls the
fan circuit.
X6M
(FAN)
a
1
2
c
b
d
EXAMPLE
a
FAN output terminal
b
Relay
c
Extraction fan power supply
d
Extraction fan
SVS output (external alarm)
The SVS output is a potential free contact on terminal X6M that
closes in case a leak is detected in the BS unit.
The SVS output must be used when an external alarm is required
(see
"12.3 To determine the required safety measures"
FAN
1 2
b
SVS
1 2
X6M
a
a
SVS output terminals (1 and 2)
b
Cable to external alarm circuit
NOTICE
The SVS output is a potential free contact with a limited
capacity of 220~240 V AC – 0.5 A.
Do NOT directly use the SVS contact in the alarm circuit.
Instead, use the SVS contact in conjunction with a power
supply to energize a relay that controls the external alarm
circuit.
X6M
(SVS)
a
1
2
b
d
c
e
EXAMPLE
a
SVS output terminal
b
Relay power supply
c
Relay
d
External alarm power supply
e
External alarm
Cable routing
Route the FAN or SVS output cable as indicated below. Leave
±20 cm additional length of cable for lowering the switch box.
c
b
c
a
BS4~12A
X1M
X6M
a
Power supply cable (field supply)
b
Output cable (FAN cable shown)(field supply)
c
Tie-wrap (accessory)
16
Configuration
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: RISK OF ELECTROCUTION
16.1
Making field settings
16.1.1
About making field settings
To configure the BS unit, you MUST give input to the BS unit's main
PCB's (A1P, A2P and A3P, depending on the unit). This involves the
following field setting components:
▪ Push buttons to give input to the PCB
▪ A display to read feedback from the PCB
