Fulton Boiler FBS Series
15 FBS 01/05
NOTE
1. When selecting this position from either PUMP ONLY or OFF, the power restoration alarms
will be activated. The alarms can be cancelled by pressing the High Pressure Alarm and
2
nd
Low Water Alarm/Reset switches.
2. The 2
nd
Low Water Alarm can only be cancelled if the boiler water level is above the 2
nd
Low Water Level. If the alarm cannot be cancelled, allow the feed water pump to restore
the water level to the normal working level (approximately mid-way up the sight glass) and
the reset the alarm.
Low Water Safety Relays and Feedwater Pump Relays.
These relays operate in conjunction with probes suspended in the boiler shell to automatically
maintain the water level in the boiler between set limits. If the water should fall to an unsafe level, the
burner is cut out and an alarm is sounded. The probes are located in two, 100mm diameter
standpipes mounted on either side of the boiler centre line towards the front of the boiler. A standard
boiler is fitted with Feedwater pump On/Off, 1
st
Low Water and 2
nd
Low Water probes.
Steam Pressure Controls.
Three steam pressure controls are mounted on the side of the control panel. These are as follows:
a) Control Pressure On/Off Switch. Controls the on/off cycle of the boiler, switching the burner off
when the desired steam pressure is reached and switching it on when steam pressure falls.
b) High Limit Switch. Should the Control Pressure Switch fail, the steam pressure will raise above
the pre-set limit causing the High Limit Switch (set a least 0.5 bar higher than the Control
Pressure Switch) to switch off and lock out the burner. A High Limit Indicator will illuminate and an
alarm will sound.
c) High/Low Pressure Switch. Switches the burner from high to low flame and vice-versa.
Burner Programmer.
Is located in the centre of the control panel. Acts in conjunction with a sensing device to ‘supervise’
the ignition sequence, prove the flame is satisfactory and finally ‘monitor’ the established flame.
Should any fault occur, either during the ignition sequence or during normal running, the programmer
will immediately go to ‘lock-out’ and both main and pilot gas/oil valves will shut to isolate the fuel line
to the burner.
Sequence Manual/Auto Switch (when fitted).
Used to select either manual or automatic sequence step control. In the manual position the burner
will operate under the direct control of the master pressure controller, mounted in the steam
header/distribution pipework. The boiler mounted high pressure and on/off pressure switches are still
functional.
Flame Failure Indicator.
Indicates the burner combustion control relay, detects a flame failure
condition.
Hand Indicator (when fitted).
This lamp will illuminate when the hand/auto switch mounted inside
the burner control panel is in the hand position, normally used for commissioning only.
Auto Indicator (when fitted).
This lamp will illuminate when the hand/auto switch mounted inside the
panel is the auto position.
High Pressure Indicator (when fitted).
This lamp is not wired when high steam pressure
alarm/lamp is provided in the boiler control panel.
2. Burner
Fulton boiler FB-S model can mounted with gas burner, oil burner or dual fuel burner on customer’s
requests.
OIL BURNER
The fuel for the oil burner is from No.2 to No.6 oil. The standard
light oil burner for Fulton boiler is No.2 oil. The heavy oil burner
can be used for No.4 to No.6 oil.
1) Air Pressure Switch.
Mounted on the burner, this switch is
operated by the pressure of air entering the burner though the
throat of the scroll. Lack of combustion air, or insufficient air
pressure, will stop the switch completing the circuit, preventing
the burner from operating.
2) Air Damper Servomotor.
The combustion air control system
including air damper and a servomotor. 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
