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5.11
Combustion head adjustment
At this stage of installation the blast tube and the pipe coupling
are secured to the boiler as shown in Fig. 17.
Therefore the adjustment of the combustion head is particularly
easy, an adjustment that depends solely on the maximum power
of the burner.
Therefore, this value must be set before adjusting the
combustion head.
Two adjustments of the combustion head are available.
Air adjustment Fig. 17
See diagram Fig. 18.
Rotate the screw 4)(Fig. 17) until the notch you have found
corresponds with the front surface 5)(Fig. 17) of the flange.
Gas adjustment Fig. 17
When the burner is installed for maximum output 1300 Mcal/h
(about 1500 kW), fit discs 1) and 2) (Fig. 17) supplied as standard
by removing the inner tube 3) (Fig. 17).
If the mains gas pressure is low, the head can be left in standard
configuration, limiting the modulation minimum to 450 Mcal/h
(about 520 kW).
5.12
Closing the burner
Once the combustion head adjustment is completed:
reassemble the burner on slide bars 3)(Fig. 19), about 100
mm from the pipe coupling 4)(Fig. 19);
insert the probe cable and the electrode cable, then slide the
burner as far as the pipe coupling.
Refit screws 2) on slide bars 3).
Fix the burner to the pipe coupling with screws 1)(Fig. 19).
Reconnect the articulated coupling 7) to the graduated
sector 6)(Fig. 19).
When fitting the burner on the two slide bars, it is
advisable to gently draw out the high voltage
cable and the flame detection probe cable until
they are slightly stretched.
ATTENTION
After carrying out maintenance, cleaning or
checking operations, reassemble the cover and
all the safety and protection devices of the burner.
Installation
Example: MAX burner output = 1370 Mcal/h.
The diagram (Fig. 18) shows that for this burner output, the air
adjustment should be made on notch 3, as in Fig. 17.
The example on page 21 shows that a burner with an output of
1370 Mcal/h (1593 kW) requires about 8 mbar of pressure at test
point 6)(Fig. 17).
Before starting the burner, carry out the adjustments for the
output required and indicated in the diagram (Fig. 18).
NOTE:
Depending on the specific application, the adjustment can
be modified.
Notches No. (air = gas)
D1267
Fig. 17
19
GB
Maximum burner output (kW)
D1268
Fig. 18
20156569
Fig. 19
20154249
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