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6.12
Ignition failure
If the burner does not switch on, there is a lockout within 3s of the
electrical supply reaching the fuel valve.
It may be that the fuel does not arrive at the combustion head
within the safety time of 3s.
In this case increase fuel ignition flow rate.
In the event the burner stops, in order to prevent
any damage to the installation, do not unblock the
burner more than twice in a row.
WARNING
If the burner locks out for a third time, contact the
customer service.
6.13
Burner flame goes out during operation
If the flame accidentally goes out while running, the burner goes
into lockout within 1 second.
6.14
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;
using the "0-AUTO" switch of Fig. 32 on page 34.
6.15
Final checks
With the burner running
Open the thermostat/pressure switch TL
Open the thermostat/pressure switch TS
Turn the gas maximum pressure switch knob to the mini-
mum end of scale position
Turn the air pressure switch knob to the maximum end of
scale position
Disconnect the minimum gas pressure switch connector
Disconnect the maximum oil pressure switch connector
Disconnect the minimum oil pressure switch connector
Obscure the flame sensor
6.16
Pump motor lock-out
If the motor does not start, it could be because of a thermal relay
intervention due to its incorrect calibration or problems with the
motor or the main power supply, to release press the button of the
thermal relay, see "Calibration of the thermal relay" on page 20.
20182250
Start-up, calibration and operation of the burner
In the event there are further lockouts or faults
with the burner, the maintenance interventions
must only be carried out by qualified, authorised
personnel, in accordance with the contents of this
DANGER
manual and in compliance with the standards and
regulations of current laws.
Make sure that the mechanical locking systems
on the various adjustment devices are fully tight-
ened.
WARNING
the burner must stop
the burner must stop in lockout
the burner must stop in lockout
the burner must stop in lockout
the burner must stop in lockout
the burner must stop in lockout due to flame loss
40
GB
Tab. P
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