Model 4
1500 - 6000 MBTU/hr
Rev. 03-08
Section B2-5
Table
B2-1.
Model
4
Boiler Sizes
MODEL
NO.
INPUT
MBH
HEAT
OUTPUT
MBH
EQUIV
HP
STEAM
OUTPUT
LB
/
HR
SHIPPING
WEIGHT
LBS
1500 1500 1200
35
1237 3100
2000 2000 1600
47
1649 3100
2500 2500 2000
59
2062 3700
3000 3000 2400
71
2474 3700
3500 3500 2800
83
2887 4100
4000 4000 3200
95
3299 4100
4500 4500 3600 107 3711 4700
5000 5000 4000 119 4124 4700
6000 6000 4800 143 4949 5400
NOTE: Steam output from and at 212 °F.
J.
Factory
painted
using hard-finish
enamel.
2.
Forced
Draft Burner
A. The
burner
is a high radiant multi-port type
approved
for
operation
on natural gas
and a
pressure atomizing
type
approved
for
operation
with
commercial grade
No.
2
fuel
oi
l.
B.
Consisting
of the fan which is direct
connected
to the fan motor, wind box, air
damper
that is
linkage connected
to a
damper
drive motor, the
complete assembly
is
factory mounted
and tested.
C. To ensure proper air for pre purge and combustion is provided by the fan, a
combustion
air
proving
switch is provided.
D. The
complete burner/wind
box
swings open
via a davit arm
attached
to the upper
drum. This permits
fireside inspection
of the
furnace
and
burner
internals.
E.
Responding
to
steam demand
from the drum
mounted pressure
control, the burner
operates in the low-high-low-off firing mode. Ultra-violet (UV) flame scanner is
provided
for flame
presence during
firing.
F. An Ignition
transformer
is provided.
G. Ignition is direct
spark
on straight oil fired
burners,
and
gas
pilot on
straight gas
or
combination gas/oil
burners.
H. Oil Train
consists
of the following:
•
4
Solenoid Shutoff Valves providing
low fire,
intermediate transitional
firing from low
to high and high fire.
•
An oil pump is
mounted
(belt
driven
from the fan motor) for
pressure atomization
of
the fuel
oil.
•
Oil
Pressure
Gauge.
•
Suction
and return tubing
connected
to an oil
connection
block.
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