Pag. 13 di 69
The check is made with heating return and
delivery probes.
ΔT del-ret and the delivery and return
temperatures of the rising speed are checks. The
pressure is checked by a minimum pressure
switch
The gas is supplied to:
To 80% of the set power for Soft Ignition,
adjustable with parameter 220
Flame ionization if checked. (by the detection
electrode).
Display 5 P1 will indicate if there is no ignition
and there will be a second attempt with 90% of
the set power for the Soft Ignition , if it is
unsuccessful, it will be indicated by
5 P2 , the third attempt is carried out with 100%
of the set power for the Soft Ignition. If the third
attempt is unsuccessful block shutdown will
occur 5 01 .
Safety time 8 sec.
Spark Generator
and gas valve ON
Occurs after air pressure switch enabling
Air pressure switch enabling allows to pass to
the following phase (after the enabling the air
pressure switch is not checked up to the
following restart anymore).
If this doesn’t occur, after 20 seconds, the boiler
will stop for safety
6 P1
the Fan remains on
waiting for consent (sealed chamber models).
On the open chamber models instead a
thermostat control is performed (which continues
even while it is operating). If the Flue Control
thermostat is enabled there will be a block
shutdown
6 01
.
Air pressure
switch
CONTROL
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