Fulton Boiler FBS Series
FBS 01/05 16
controls the combustion air entering the burner on the requirement of the boiler heating during
operating. The standard servomotor of the oil burner is Landis & Staefa STM6 with 5 cam motor.
A fully closed position is provided to prevent air flowing through the appliance when the burner is
not in operation.
3) The Inner Assembly.
Consist of flame tube, diffuse, oil nozzle, ignition electrode and so on.
4) Oil Nozzle.
The oil nozzles are held in a nozzle block located within the flame tube. The nozzles
are pre-sized by the manufacture according with the heat inputs required and the available
operating pressure. When replace the nozzles, they must be the same capacity as the original.
NOTE
When fitting nozzles to the heavy oil burners the nozzle filters must be removed.
In calculating the correct size of nozzles to be fitted, the following
should be taken into account::
Nozzles are marked for capacity and calibrated at an oil pressure
of 7 bar/100psi. the correction factor to be used to establish the
nozzle sizes is as follow:
Nozzle marking
1.66
Imperial Gallons at 27.6 bar-400 PSI
Nozzle marking
7.16 = Kg/h at 27.6 bar-400 PSI
5) Oil Preheater Tank( for heavy oil burners).
The oil preheater
tank is mounted on the heavy oil burner ahead of the fan housing.
Its function is to preheat the oil to correct temperature. The unit is
equipped with three thermostats, ‘low temperature’ ‘operating’ and
‘limit’. A thermometer and hot oil filter are mounted together as
one unit on the top left-hand side of the preheater tank viewed
from the rear of the burner.
GAS BURNER
1) Air Pressure Switch.
Each of the gas burners is mounted
a Air Pressure Switch on the burner scroll. Lack of
combustion air, or insufficient air pressure, will stop
the switch completing the circuit, preventing the
burner from operating.
2) Air Control
The Air Control System of the gas burners is similar to
that of the oil burners. The servomotor is mounted on
the rear of the air inlet of the burner and directly
coupled to the air damper blade. This system monitors
and controls the combustion air entering the burner on
the requirement of the boiler heating during operating.
The standard servomotor of the oil burner is Landis &
Staefa STM30 with 3 cam motor. The servomotor has
been adjusted by manufacture before the boiler delivery, so normally customer needn’t to set it again.
3) Gas Train Assembly.
Consist of pilot and main supply line, each line having a manual cock, a governor, solenoid operated
valves and two air pressure switch (high and low). The governors maintain a constant pressure of fuel
entering the burner and are adjustable. The solenoid valves are electronically controlled by the burner
programmer. For specific details, consult the burner manufacture’s instruction Manual.
Three thermostats on the preheater tank