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DIAGRAM OF FUEL OIL MODULATING BURNERS (MAGNET - NOZZLE WITHOUT PIN)
CONNECTION AT THE FUEL FEEDING
DIAGRAM FOR ONE OR MORE
BURNERS
(SEE 0002901120; 8511/6; 8513/7)
1
FILTER
2
BURNER PUMP (20÷22 bar)
3
PRESSURE GAUGE (0÷40 bar)
4
ATOMIZER UNIT
5
RETURN NOZZLE WITHOUT PIN
6
ROD WITH CLOSING PINS
7
BY-PASS HOLES
8
CLOUSING SPRING
9
OPENING ELECTROMAGNET
10
RETURN PRESSURE REGULATOR
MIN = 10-12 BAR MAX = 18-20 BAR
DIAGRAM OF A DISMANTLED ( C.B. ) CHARLES BERGONZO NOZZLE (WITHOUT PIN)
Nozzle ID.:
Flow rate kg/h
Spray angle (30° - 45° - 60° - 80°)
Flow ratio (1/3 = B3 - 1/5 = B5)
Fuel outlet
For the nozzle to operate properly, its "return" section must never be completely closed. This is achived by regulating where the
!
burner is started up for the first time. In practice, when the nozzle is operating at the maximum flow rate, the difference in pressure
between the "delivery" (pump pressure) and "return" (pressure at the return pressure regulator) pressure (running to and from the
nozzle) must be at least 2 ÷ 3 bar.
Example:
Pump pressure
Return pressure
Return pressure
11
12
13
14
15
16
17
18
19
20
21
Air turbolence
chambre
Fuel return hole
20 bar
20 - 2 = 18 bar
20 - 3 = 17 bar
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0006081143_201107
MODULATION SERVOMOTOR
CONTROL DISK FOR VARIATION OF FUEL / AIR DELIERY
AIR REGULATION SHUTTERS
FLEXIBLE PIPE
ELECTRIC PRE-HEATER
SELF-CLEANING 0.3 mm FILTER
THERMOMETER
MIN. PRE-HEATER THERMOSTAT
MAX. PRE-HEATER THERMOSTAT
PRE-HEATER ADJUSTER THERMOSTAT
NOZZLE RETURN THERMOSTAT
Viton O-ring (oil and teperature resistant)
Fuel inlet
Pump pressure
22 bar
Return pressure
22 - 3 = 19 bar
Return pressure
22 - 2 = 20 bar
E
N
G
L
I
S
H
Fuel return
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