VMP-IOMM-2018-2
Fulton Ltd
Page 35
OPERATION - 4
4.2.2
BOILER CONTROL PANEL
Indicator lights are fitted to the control panel as an additional aid to the operator.
The meaning and operating sequence of these lights is as follows:
CAUTION
The power on light is derived from a single phase. It is possible that with the control phase down or a
defective bulb the other phases could be live. Always isolate the supply before investigating any fault.
!
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Power On
Indicates that power is being supplied to the control panel box.
Pump OFF/ON
This switch isolates the feedwater pump and must be switched ON before switching on the Boiler
OFF/ON switch. This functions as a pump interrupt switch.
Boiler OFF/ON
This switch isolates the burner and must be switched ON to initiate burner start-up.
Low Water Limiter 1
This light will energise when the boiler water is below low limiter 1. The light will illuminate, a
continuous alarm will sound and the burner will go to lockout. Once the water in the boiler has
been restored to a safe operating level, pressing the Common Alarm Reset button will reset the
controls and allow the burner start sequence to initiate.
Low Water Limiter 2
This light will energise when the boiler water is below low limiter 2. The light will illuminate, a
continuous alarm will sound and the burner will go to lockout. Once the water in the boiler has
been restored to a safe operating level, pressing the Common Alarm Reset button will reset the
controls and allow the burner start sequence to initiate.
High Water Level
Indicates high water level in the boiler, isolates the feedwater pump and sounds an alarm.
Once the water in the boiler has been returned to a safe operating level, the light will go out and
normal control is resumed.
High Steam Pressure
This light indicates when the boiler pressure exceeds the maximum allowable pressure. The high
pressure controller can be reset using the switch on top of the controller.
Ignition
Indicates that the ignition transformer has been energised. This light will only be illuminated for
approximately 5 - 10 seconds during the ignition sequence.
Low Gas Pressure
This light will illuminate whenever the gas is off, or below minimum inlet pressure required by the
European Standard for gas burners EN676. This switch is factory set and should not be adjusted
after the boiler has been commissioned.
Main Gas
This light illuminates when the Multi-bloc gas valve is energised.
Pilot Gas
This light indicates the gas valves in the pilot line are energised.
