the dry or wet-back type, packaged units mounted on a skid-type structural
steel base. Provide each boiler complete burner and fuel system, a forced
or induced draft fan, an automatic electronic control system complete with
combustion and flame safeguard controls, firing sequence programmer, safety
interlocks, limit controls and central control panel, and such trim and
appurtenances as are peculiar to water units as specified herein. Units
shall be factory-wired and assembled except for such readily installed
appurtenances as safety valves, water columns, and pressure gages. Units
shall be complete and ready for operation when connected to water, fuel,
and electrical supplies.
2.2
BURNERS AND CONTROL EQUIPMENT
**************************************************************************
NOTE: Indicate fuel trains on the drawings.
Conform to the requirements of ASME CSD-1 and
MIL-B-18796. See MIL-B-18796 for guidelines for
selection of a combustion control system.
**************************************************************************
[2.2.1
Gas-Fired Power Burner
MIL-B-18796, Class 3 - gas-fired, automatic recycling. Interrupted pilot
type ignition system, and pilot shall be electrode-ignited natural gas
type. The combustion control system shall be the [high-low-off]
[positioning] [metering] type. Design burner and combustion-control
equipment for firing natural gas having a specific gravity of [0.6] [_____]
and a heating value of approximately [_____] [37,300] kJ per cubic meter
[_____] [1000] BTU per cubic foot and be an integral part of the boiler.
Burner controls and safety equipment shall conform to the applicable
requirements of MIL-B-18796. Mount controls; including operating switches,
indicating lights, gages, alarms, motor starters, fuses, and circuit
elements of control systems on a single control panel or cabinet designed
for separate mounting not on the burner in accordance with MIL-B-18796.
Locate flame scanner such that testing and cleaning of scanner can be
accomplished without disassembly of burner. Provide fuel train as
indicated. Gas pressure available: [_____ Pa in. wc] [_____ kPa (gage)
psig].
][2.2.2
Oil-Fired Power Burner
MIL-B-18796, Class 2 - Light Oil-Fired, automatic recycling.
[Pressure-atomizing] [Air-atomizing; compressor or pump furnished with the
burner] type burner. The combustion control system shall be the
[high-low-off][positioning] [metering] type. Ignition system shall be
[direct electric-spark-ignited type] [interrupted pilot type, and pilot
shall be [electrode-ignited [natural] [propane] gas type] [light oil
spark-ignition type]]. Design burner and combustion control equipment for
firing commercial grade no. 2 fuel oil and be an integral part of boiler.
Burner controls and safety equipment shall conform to applicable
requirements of MIL-B-18796. Mount controls; including operating switches,
indicating lights, gages, alarms, motor starters, fuses, and circuit
elements of control systems on a single control panel or cabinet designed
for separate mounting not on burner in accordance with MIL-B-18796. Locate
flame scanner such that testing and cleaning of scanner can be accomplished
without disassembly of burner. [Provide fuel train as indicated.] Oil
fired boilers shall have a steady state combustion efficiency of at least
83 percent.
SECTION 15515N
Page 8
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