Watts Febco LF866 Serie Instructions D'installation page 3

Install the Flood Sensor and Activation Module
Attach the flood sensor and the activation module to the backflow relief valve. The activation
module receives a signal from the flood 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 BMS input terminal.
Custom Flood Sensor Settings
Activation module switch settings can be customized to specify the wet threshold
(sensitivity to water discharge) and the timer delay (duration before alarm). Scan
the QR code for more information.
1. Position the flood sensor on the relief valve.
3. Use the two wrenches to tighten the hardware securing the
sensor to the valve.
5. Press the activation module onto the sensor.
2. For each side of the sensor, put the washer on the head of
the bolt, thread the bolt from the bottom, and hand-tighten
the nut to the bolt.
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.
NOTICE
Retain the dust cover to protect the flood sensor when the
activation module needs to be removed or replaced.
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