flamco WMS 2-1 Installation Et Mode D'emploi page 14

Sensor
1. Route the sensor cable through the left compression coupling in the signaling unit.
2. Connect the sensor cable to the two terminals on the signaling unit labeled "Sensor".
Polarity does not need to be observed.
3. If the 1.5 m sensor cable is not long enough, the sensor cable can be extended using
2 x 1.5 mm² shielded cable. The length of the connecting cable between the sensor
and the signaling unit must not exceed 10 m.
4. The connecting cable must be routed so as to avoid external interference.
5. Ensure a minimum degree of protection of IP 65 as per EN 60529.
External release
6. A pushbutton (normally open contact) for externally releasing the WMS can be
connected to the two terminals on the signaling unit labeled "Rel." at a distance of up to
10 m. The maximum voltage at these terminals is 12 V.
7. The button connections must be potential free.
8. If you use an external release, use the following electrical circuit as per EN 50156-1.
Output
The output signal from the WMS can be tapped using a zero-potential relay contact
(double throw switch). This relay contact is used for the safety shutdown of the furnace.
9. Route the electrical wiring (maximum 10 m) so that the power to the furnace is
interrupted in the event of an alarm.
During normal operation, the relay contact is energized; in the event of an alarm, the
relay contact is in idle position.
10. The output contact of the low water level protection system must be protected with an
external fuse of max. M 2 A.
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ENG: Installation and operating instructions
Translation of the original operating instructions