FULTON FB-L 012 Installation Operation And Care page 25

Boiler Controls
The boiler is now fully operational and will
be automatically controlled as follows:
1. The steam operating pressure control will
control the on/off cycle of the elements
once the boiler is operating. The low
water cut-off probes will signal the low
water relays and shut off power to the
elements should the water in the boiler
drop to an unsafe level and will only re-
energize the elements when the water in
the boiler has regained a safe level.
Proper water level control is maintained
automatically by two water level probes
located in the boiler shell (1.2-20 HP) or
in the water column (30-100 HP). These
two probes turn the feedwater pump on
or off.
2. Fulton Boilers are equipped with solid
state plug-in relays. Manual reset is
standard. It can easily be distinguished
by the low water reset button located on
the panel box. For Models FB-012-L
through FB-036-L there is a pump
control relay and one low water cut off
control relay located in the panel box.
For Models FB-050-L through FB-1000-
L there is a pump control relay and two
low water cut off control relays located in
the panel box. The pump control relay
is located on the left and the water level
control relay(s) on the right.
Operation
CAUTION
Do not tamper with the safety features of
the low water safety cut off.
3. The boiler has a manual reset control
should a low water condition arise. It will
be necessary to reset the low water
control after the water again reaches a
safe level in the boiler. In the event of
power failure this control must also be
reset. Place the main switch to the "on"
position and press the low water reset
button and the contactor will start.
4. On Models FB-012-L through FB-075L
after starting the boiler and the steam
pressure reaches the set pressure on
the operating pressure control, the
heating element will then shut off
automatically, and the green light will go
out. After the steam pressure drops
according to the differential setting on
the operating pressure control, the
heating element will then restart
automatically and the green light will
come back on. The differential can be
changed on the steam operating
pressure control by adjusting the screws
found on the top of the control.
5. Models FB-100-L through FB-1000-L do
not have a green light, but instead, are
standardly supplied with a step
sequencer which is located inside the
panel box. The step sequencer
indicates which element contactors are
energized
Step Sequencer
WARNING
When stopping the boiler for any
extensive repairs, shut off main power
switch and pull the main disconnect
switches.
21
Electric IOM