Model 4
1500 - 6000 MBTU/hr
Rev. 03-08
Section B2-33
K. Natural
Gas
Pilot
T
r
ain
1. A pilot
gas pressure regulator
shall be
factory mounted
and
piped for
pressure regulation
of the pilot
gas
to the burner.
2.
The
pilot
gas
train shall
include
a
safety
shutoff valve. It shall
be
controlled
by the
programming relay
to start the burner.
3. A manual shutoff
valve
shall be
located ahead
of the pilot gas
pressure
regulator.
L. 2.3.12 Oil
System
1. An oil pump shall be provided.
The
oil pump,
integral
with the
burner,
shall include a built–in relief
valve
and self–cleaning
strainer.
2.
The
oil pump shall be belt
driven
from the
blower
motor.
3.
The
fuel oil
system
shall include
supply
and return tubing to a
terminal block, an oil
pressure gauge,
shutoff cock, and four
solenoid
oil shutoff valves.
These
items shall be factory
mounted
and piped on the front
head
(windbox).
2.4
BURNER MANAGEMENT SYSTEM
A.
Control
Panels
1.
The
control
panel
shall be a
NEMA
1 rated
panel
and
have
a
key
lock.
2.
The
control
panel
shall be
mounted
on the front
head
of the
boiler and shall be
conveniently located
for the boiler
opera
t
o
r
.
3.
The panel
shall
contain
the
blower
motor
starter, control
circuit
fuses, control
circuit
transformer,
and
control
switches. A
damper selector
switch shall be
provided
to permit
selection
of
automatic
or manual
selection
of low or high firing.
4. A terminal
board
shall be
provided
to which all
wires
entering
or
leaving
the
panel
shall be connected.
5.
The panel
shall
include
four
indicating
lights to
show
operating
conditions
of: red
=
low water; red
=
flame failure; white
=
load
demand;
and white
=
fuel
valve
open.
The
lights and
switches
shall be
located
on the
panel
switch ledge.
6. All
electrical service connections
shall be
made
to an electrical
entrance box
to be
mounted
on the right
hand side
of the boiler.
7. All
electrical
wiring shall be oil, heat, and
moisture
resistant
and shall be
number
coded.
B.
Combustion Safeguard Control
1. A
combustion safeguard
control
(program relay)
shall be
provided
to control ignition, starting, and
stopping
of the
burner. It shall
provide precombustion
and postcombustion
purge periods
and shall stop
burner operation
in the
event
of
ignition, pilot, or main flame failure. Trial for ignition shall be
limited to 10 seconds.
2.
The
boiler shall be
provided
with a
combustion
safeguard
controller
that
provides technology
and
functions equal
to the
Cleaver Brooks Model
CB120E.
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