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Electrical installation
Installer and user reference guide
74
EKVDX32~100A2VEB
VRV system air conditioner
4P664010-1 – 2021.08
e
Normal VRV indoor unit
17.3 To connect the external outputs
The applied current of the external device MUST be less or equal than 1 A. Install a
fuse ≤1 A to protect the internal PCB contact.
If the applied current of the external device is more than 1 A, the use of a field
supplied external relay is mandatory to limit the current in the internal PCB
contact. See the example diagram below:
X1M
(I
≤
1 A)
240 V AC
240 V AC
a
b
c
f
d
e
g
a
Relay PCB output terminal
b
AC power supply for relay
c
Fuse ≤1 A
d
Relay (field supply)
e
Relay PCB
f
AC power supply for external device
g
External device (e.g. external alarm)
In case of R32 refrigerant, the user interface built-in alarm MUST be 15 dB louder
than the background noise of the room. If this is not the case:
1
Mount an external alarm (field supply) in every EKVDX.
2
Connect the external alarm to the relay PCB of each EKVDX or to the SVS
output channel of the outdoor unit.
3
Turn off the user interface built-in alarm if the external alarm is installed in the
same space as the user interface.
Note:
The refrigerant leakage alarm MUST be set to ON. The user interface will
generate a visible and audible warning sign in case of R32 refrigerant leakage
detection or sensor failure/disconnection.
INFORMATION
Sound data about the refrigerant leakage alarm are available in the technical data
sheet of the user interface. E.g. the BRC1H52* controller generates an alarm of 65 dB
(sound pressure, measured at 1 m distance from the alarm).
17.4 To connect the external input
INFORMATION
For details about the different user interface modes and how to set up, refer to the
installation and operation manual delivered with the user interface.