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C - MOTOR OVER LOAD RELAY
Set by the factory for 400V three-phase supply.
Should the electric supply by 230V three-phase, the setting has to be modified as indicated at page 6.
D - TIMER
It controls the period of the pre-purge phase; set by the factory between 15 - 20 s. (For heavy oil operation see the
modification kit).
When the burner is going to be put in operation, the installer has to carry out the following settings:
A - Maximum fuel capacity
B - Pressure controller
C - Combustion head
D - Air damper
E - Spray temperature
A - ADJUSTMENT OF THE MAXIMUM FUEL CAPACITY
This adjustment is carried out by choosing the proper nozzle from the table here below.
Nozzle Bergonzo
type B5
200
175
150
125
100
25 bar for oil with low viscosity value-up to 30 bar for oil with viscosity
In order to avoid any clogging remove the nozzle filter.
If you desire a max. output intermediate between two values indicated in the table, it is useful to choose the nozzle
with higher delivery. The delivery decrease could be obtained later by acting on the pressure controller, see item B.
5506
ADJUSTMENTS NECESSARY TO THE BURNER
Maximum
Fuel pressure in the deli-
delivery
very line manometer (2)
kg/h
200
175
150
125
100
fig.3
25
25
25
25
25
≥
20°E at 50°.
8
GB
Fuel max. pressure in the
return line manometer (3)
fig.3
24
24,5
24,5
24,8
24
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