Electronic flame monitoring

1st function

When the electronic flame monitoring system (EFLÜ) is switched on, the ignition voltage (16kV) is conducted to the electrode via the ignition cable. (Distance of the ignition electrode to ground max. 2mm) simultaneously the solenoid valve is opened. The ignition arc ignites the gas. An alternating current signal is conducted to ground via the gas flame. This signal is rectified by the ionized gas flame. The rectification is measured by the electronic circuit. If the measurement is positive, the solenoid valve is held in the open position (yellow LED illuminated). If the measurement is negative (no flame, or the electrode is at ground), the solenoid valve is closed (red LED and external light are on). If the flame was ignited and goes out due to external circumstances (e.g. wind), a one-time re-ignition of approx. 5sec. takes place. The flame monitoring must then be switched off and reactivated.

2. connection

The wiring diagram is located on each flame monitor. The plug-in connections are marked with numbers, which must be connected according to this circuit diagram.

1 = External display for error messages.

2 = Connection to the solenoid valve. (The solenoid valve must be de-energized).

3 = Current input 12 DC (10-15 V ) or 24 DC ( 20-30 V ). Connect a 5 Amp fuse upstream of the flame monitor.

4 = Connection to ground. A good connection to ground is important for the function of the flame monitor. The ground connection of the flame monitor must be connected to the burner.

3. burner with pilot and main burner

If a burner is equipped with pilot and main burner, an extended monitoring for 2 solenoid valve connections is required. (article no. 8250.2)

4. error display

If the monitored flame goes out, the red LED and the external light come on.

5. dimensions and mounting dimensions

See drawing

5.1 Distance between ignition electrode and ignition mass approx. 2 mm

6. maintenance

CAUTION:

All electrical connections must be disconnected before starting any welding work on the carrier.