Wilo DrainAlarm Manual page 13

7.4 Display of the various operating
statuses
8 Commissioning
8.1 Operator responsibilities
8.2 Commissioning in explosive atmo-
spheres
Installation and operating instructions • Wilo DrainAlarm/DrainAlarm FIRST • Ed.01/2024-08
• Alarm output, not potential-free: Normally open contact
To connect an alarm horn or light directly.
• Alarm output, potential-free: Changeover contact
To connect external alarm signals or existing controls.
Alarms can be acknowledged directly via the buttons on the switchgear. Alternatively, you
can also use an external button to acknowledge alarms.
DrainAlarm − mains-independent alarm signal
A fill level is recorded via a float switch at the alarm input. If the fill level is reached, an
acoustic alarm signal is triggered via the integrated buzzer. Further signalling can also take
place via the two alarm outputs:
• Alarm output, not potential-free: Normally open contact
To connect an alarm horn or light directly.
The alarm output is operated via the battery. If the mains connection fails, the alarm sig-
nal is maintained for approx. 60 minutes.
• Alarm output, potential-free: Changeover contact
To connect external alarm signals or existing controls.
Alarms can be acknowledged directly via the buttons on the switchgear. Alternatively, you
can also use an external button to acknowledge alarms.
Furthermore, the mains connection is monitored. If the mains connection fails, this is sig-
nalled visually (LEDs) and an acoustic alarm signal is triggered via the integrated buzzer.
Operating statuses
Normal operation
Alarm input active
Mains voltage interrupted
Alarm input active, alarm signal acknowledged
• Provide installation and operating instructions at the switchgear or at a place specially
reserved for it.
• Make the installation and operating instructions available in a language the personnel
can understand.
• Make sure that the installation and operating instructions have been read and under-
stood by all personnel.
• The installation site of the switchgear is flood-proof.
• The switchgear is properly fused and earthed.
• The signal transmitter must be installed and set in accordance with the system docu-
mentation.
DANGER
Risk of explosion if the switchgear is installed in potentially ex-
plosive areas!
The switchgear does not have its own explosion protection class!
• Always install the switchgear outside hazardous areas.
LEDs
on off off
on on on
off on on
on on off
en
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