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5.7.4
Burner flame goes out during operation
If the flame accidentally goes out during operation, the burner will
go into lockout within 1s.
5.8
Stopping of the burner
The burner can be stopped by:
intervening on the disconnecting switch of the electrical sup-
ply line, located on the boiler panel;
removing the casing and intervening on the switch Fig. 28 on
page 24.
5.9
Final checks (with burner operating)
Open the thermostat/pressure switch TL
Open the thermostat/pressure switch TS
Turn the air pressure switch to the maximum end of scale
position
Turn off the burner and cut off the power
Disconnect the minimum gas pressure switch connector
Disconnect the wire of the ionisation probe
Make sure that the mechanical locking systems
on the various adjustment devices are fully tight-
ened.
WARNING
5.9.1
Checking the air and gas pressure on the
combustion head
To check the air and gas pressure on the burner pipe coupling,
install the relative pressure gauges as shown in Fig. 38.
Gas pressure
+
_
D8697
20194185
Start-up, calibration and operation of the burner
+
_
Air pressure
Fig. 38
Carry out all the operations, then reassemble the
hood and all the burner safety and protection de-
vices.
The burner must stop
The burner must stop in lockout
The burner must not start
The burner must stop in lockout due to ignition failure
30
GB
Tab. H
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