EN
Start up
- Adjusting burner output
A
B
Servomotor SQN75
Remove cover to enter the adjusting
cams. Adjust cams through the suitable
key (on issue) and a screwdriver.
I
- Adjusting cam (BLUE) for air damper
position on burner's shutdown
(total close 0°).
II - Adjusting cam (ORANGE) for ope-
ning position in ignition and Low Flame
(by the screwdriver).
III - Adjusting cam (RED) for opening po-
sition in High Flame (max. output).
IV - Adjusting cam (BLACK) to allow the
opening of High flame solenoid valve.
(5): MANUAL RELEASE SWITCH
!
Risk of air blast!
Continuously check CO, CO 2 and soot emissions when adjusting the output of the burner. Optimise combustion values in the
event of CO formation. CO must not exceed 50 ppm.
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"PAB" version gas burners gas train in-
stallation and setting instructions (A)
Fix the gas train to burner body by means
of the 4 screws of the flange, pay attention
to set correctly the gasket ( O-ring ). Con-
nect electrically the gas train with the 2
connectors of the valve (black) and gas
pressure switch(gray).
Switch on the burner (it has already been
tested in the factory, so it is pre set on ave-
rage values) and verify the tightness of
gas train connections made during installa-
tion. Act as follows to adapt the burner out-
put to the boiler.
Regulating the combustion of the two-
stage burner (PAB version)
Follow the sequence of operations:
Maximum power regulation:
1) position the air valve in the fully open
setting (90°, through the dispaly. For parti-
cularly low power only, if the reduction of
air is not sufficient with the head in position
1, reduce the opening of the air valve).
2) dose the air by moving the combustion
head (figure) to suit the power required (as
shown in figure).
3) dose the gas by regulating the gas ramp
(see figure in the ramp manual).
Low flame setting:
1) after regulating the maximum power
and determining the working pressure of
the gas in the head, position the valve on
the low flame setting, 25° through the di-
spaly, and dose the gas using the regula-
tion screw on the butterfly valve of the gas.
(figure).
2) if the minimum charge obtained in this
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way is too low for the heat generator, in-
crease the opening of the air valve, adju-
sting the flow of gas using the butterfly
valve of the gas to obtain the minimum ap-
propriate power.
Firing head setting (B).
To act on the screw in fi gure:
• turn Allen key till you reach the
requested value (index 1-5).
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