Wilo DrainAlarm Manual page 10

en
6.5 Electrical connection
6.5.1 Alarm input connection
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Install the float switch according to the installation plan of the unit. Observe the following
points:
• The float switch can move freely in the operating space (pump chamber, tank).
• Check contact type (NO contact or NC contact).
• Check "top" and "bottom" switching point.
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death
due to electric shock!
• Before all electrical work, disconnect the product from the mains and
secure it against being switched on again without authorisation.
• Disconnect the battery and insulate the plus contact.
• Electrical work must be carried out by a qualified electrician!
• Observe local regulations!
DANGER
Risk of explosion due to incorrect connection!
If the connected float switch is installed within a hazardous area (ex-
zone), there is a risk of explosion if the connection is faulty!
• Connect the float switch using an Ex cut-off relay!
• Connection must be carried out by a qualified electrician.
NOTICE
Finally, connect the mains connection and battery!
Once the mains connection is established or the battery is connected,
the switchgear is in operation.
• First connect all inputs and outputs (float switch, alarm signal, etc.).
• Then connect the battery (only DrainAlarm)
• Establish the mains connection as a final step.
• The mains connection current and voltage must be as stated on the rating plate.
• Earth the switchgear − mains connection with correctly installed protective earth con-
ductor.
• Fuse on mains side: max. 10 A.
• Use a circuit breaker with switching characteristic "B".
• Provide a residual-current device (RCD) in accordance with the local guidelines.
• Route connection cable in accordance with the local guidelines.
• Be careful not to damage the connection cables (e.g. pulling or squeezing/crushing)
when installing them.
• Seal unused threaded cable glands.
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage (connect potential-free).
Installation and operating instructions • Wilo DrainAlarm/DrainAlarm FIRST • Ed.01/2024-08