FULTON ICS Classic Series Instruction, Operation And Maintenance Manual page 55

Operation
Gas Burner Set Up For Boilers
Equipped with Modulation
a) Modulation is available as an
option on Fulton gas fired steam boil-
ers for 30 -100 HP units only.
b) Boilers equipped with modulation
will have the linkage rod disconnected
between the modulation motor and
the gas butterfly valve for shipment.
c) Mount the gas train on the pipe
nipple of the burner plate with the gas
train inlet directly facing over the
panel box. Reconnect the linkage
from the butterfly valve to the modula-
tion motor.
d) The end of the linkage arm that
attaches to the butterfly valve will
have a notch on both sides of it, where
the swivel collar should be centered.
This setting was based on factory test
fire conditions.
e) Combustion analysis should be
done at the installation to make any
changes to insure proper combustion
characteristics.
f) The modulating burner will have a
modulation lock switch in the panel
box to enable you to lock the firing
sequence anywhere along the firing
rate from low to high.
g) Depending on the combustion
characteristics, it may be necessary
to adjust both linkage arms. To adjust
the linkages, unscrew the swivel col-
lar and move the linkage rod in the
appropriate direction.
h) Modulating burners will have a pro-
portioning pressure control in addition
to the standard operating pressure
control that will send a 0-135 ohm sig-
nal to the modulation motor to adjust
the firing rate. Both pressure controls
should have the same setting.
i) NEMA 4 units will use a digital
pressure controller with transducer as
the operating pressure control which
sends a 4-20 ma signal to the modu-
lation motor to control firing rate.
46-G 0/01
Modulating Gas Fired Burner
Modulation Hold/Lock Switch
Night Heating Pressure Control (Optional)
Proportioning Pressure Control
Panel Box for Modulating Gas Fired Boilers