Watts LF919 Serie Instructions D'installation page 3

Install the Flood Sensor and Activation Module
Install the flood sensor with the interface pointing in the same direction as the valve flow arrow.
The activation module receives a signal from the sensor when a discharge is detected. If the discharge
meets the conditions of a qualifying event, the normally open contact is closed to provide a signal to the
Cellular Gateway input terminal.
Custom Flood Sensor Settings
The default settings on the activation module for detecting discharge are suitable
for the assembly series. However, the DIP switches can customized for a different
wet threshold and time delay. Scan the QR code for more information.
1. Position the flood sensor on the relief valve.
3. Ensure the sensor interface points in the same direction as
the valve flow arrow.
5. Press the activation module onto the sensor.
2. Use the #2 Phillips screwdriver to attach the sensor to the
relief valve.
4. Remove the dust cover from the sensor.
6. Check that the module is fully seated to seal the O-ring and
to make electrical contact.
Retain the dust cover to protect the flood sensor when the
activation module needs to be removed or replaced.
3