14
GENERAL DIAGRAM FOR TWO FLAME FUEL OIL BURNERS
(MAGNET - NOZZLE WITHOUT PIN)
N° BT 8713/1
Pressure regulator
0,5 ÷ 2 bar
Bleed and
by-p
ass
Bleed
valve
Filter and optional
resist
ance and
thermost
a
t
Pump pressure
regulator
(20 ÷ 22 bar)
Heating coil
Pump inlet
pressure gauge
(0,5 ÷ 2 bar)
Pump
Degasifier and
hot oil recovery
Air regulation
gates
Air gate control
motor
Opening
magnet
2nd flame solenoid
valve usually open
Access to
setting
screws
1st flame return
pressure regulator
(10 ÷ 12 bar)
Closing
springs
Pump outlet
pressure gauge
(20 ÷ 22 bar)
Pre-heater
By-p
ass holes
2nd flame pressure
regolator (18 ÷ 20 bar)
TRU thermost
at
for ...D version
Return nozzle
without needle
Shaf
t with closing
cones
Atomizer unit
Pre-heater filter
1 =
Gauge to detect 1st to 2nd
flame return pressure
Min.H =
0,5 m.
Access to setting
screws
Gas and
air
bleeder
Pump
s
NB: The burner is fitted with an air pressure switch, which does not allow the pump motor to run if the pressure of the
combustion air supplied by the fan, does not reach the pressure switch setting. The air pressure switch must be
adjusted with burner ignition, according to the pressure value obtained for operation with the 1
st
flame.