Fulton FB-S Horizontal Firetube Boiler User Manual

Page 36

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13

Page 36

b) Low Water Indicator

This lamp will be illuminated and an alarm sounded when the water level,

as sensed by an internal probe, in the boiler falls to the 1

low water

level. The burner will shut down and the alarm will continue to sound until

the water level is restored to a safe working level. The alarm will then

cancel, the indicator lamp will extinguish and the burner will automatically

restart.

c) Low Water Alarm/Reset Switch

i. Sounds and alarm on switch on, press to reset. If the level of water in the

boiler falls below the second pre-set limit, as sensed by a second low

water internal probe, during boiler operation. The 2

Low Water

Alarm/Reset Switch will illuminate, the alarm will sound and the burner

will shut down. The water level must be restored before the alarm can be

cancelled by pressing the switch.

d) High Water Indicator

i. This lamp will illuminate and alarm sound when the water level reaches a

pre-determined high level, as sensed by an internal probe. The feed pump

will stop. When the water level falls to the normal working level, the

indicator lamp will extinguish and the alarm cancel.

Note

The Burner ON/OFF/Reset switch should be in the OFF
position during the filling process.

The Pump Hand/Off/Auto Switch should be in the PUMP Auto position,
except when manually filling the boiler (Hand position).

The 2

Low Water Alarm can only be cancelled if the boiler water level is

above the 2

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.

e) Low Water Safety Relays and Feedwater Pump Relays

i. These relays operate in conjunction with probes suspended in the

boiler shell (or externally mounted floater pressure differential

transmitters) 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,