Page 5 - ABB_Signal-products-Example-systems

LEAK GUARD 5

Sensor

Suitable sensors for the leak guard are tape sensor FLA2100 or any other uninsulated pair of
semiconductor cables isolated from each other. Please note that the insulation mustn't be watertight. For
example, the sensor can be made using two ML 1.5 wires with the coating peeled off around the
monitored area, which are then attached to the floor under a dishwasher with suitable screws, nails,
fasteners or gluing points. During the installation, note that any humidity or water to be detected will have
to touch both wires simultaneously.

Function selector “M” (memory function):
- When the selector is set to “-”, the memory function is inactive. The alarm disappears when there is no longer any
moisture between the wires.
- When the selector is set to “M”, the alarm will not disappear until manual reset, even when there is no longer any
moisture.

Function selector “R” (magnetic valve control):
- When the selector is set to “OFF” (the prongs are short-circuited), the alarm reset releases the magnetic valve.
- When the selector is set to “ON” (the prongs are not short-circuited), the magnetic valve is released only after the
alarm is acknowledged and the sensor is dry.

Note! If an operator switch is used in the feeder circuit, all poles must
be disconnected. Accidental disconnection of the system must be
prevented.

Leak guard

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