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5.9.2
Adjustment of the pressure controller
The variation of the pressure in the return line (manometer 3
Fig. 10 on page 16) modifies the fuel delivery from the nozzle.
Approximate ratio between: nozzle delivery and type (as %)
- return pressure
1 -
Fluidics N1
2 -
Fluidics W2
3 -
Bergonzo B3
4 -
Bergonzo B5
Nozzles available (delivery in kg/h):
Bergonzo
70
80
90
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
3
4
1
Delivery pressure: 25 bar
Ouput (%)
Fluidics
70
80
90
100
115
130
145
160
180
200
225
250
275
300
330
360
400
450
Installation
To properly rate the output range of the nozzle operation, it is
necessary to set the maximum and minimum pressure of the fuel
in the return line from the nozzle, in compliance with the above
diagram.
–
After the nozzle set-up, remove the protective cover of the
servomotor 12) Fig. 3, and ignite the burner.
–
After the burner ignition, disconnect the plug placed on the
D3437
electric board 19) Fig. 3, to take the voltage off from the ser-
vomotor.
In this way the burner operates at the minimum output.
–
Acting on the re-set lever 6) Fig. 8 disjoin the cam 1) Fig. 13
from the motor of the servomotor.
2
–
Turn manually and slowly the cam with adjustable profil 1)
Fig. 13 firmly connected to the eccentric 8) Fig. 10 and check
the pressure variation by the manometer 3) Fig. 10.
–
The output and the pressure of the nozzle are at minimum
when the servomotor is on the position of 20°, while they are
at maximum when the servomotor is positioned on 130°.
The fine adjustment of the pressure in the return line could be
carried out by changing the setting of the eccentric 8) Fig. 10, of
the nut and lock-nut 6) Fig. 10.
Fig. 9
Tab. C
GB
15
20036074
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