MIL-B-18897. Provide hot water heating boiler complete with firing
equipment, combustion chamber, insulation with steel jacket, safety and
operating controls, integral electrical wiring and other appurtenances, to
make the boiler a complete, self-contained, fully-automatic unit, ready for
service upon completion of utility connections. [Boilers less than 88 kW
300,000 Btuh shall have an Annual Fuel Utilization Efficiency (AFUE) of at
least 80 percent.] [Gas fired boilers greater than 88 kW 300,000 Btuh
output shall have a steady state combustion efficiency of at least 80
percent when fired at the maximum and minimum capacities which are provided
and allowed by the controls.] [Oil fired boilers greater than 88 kW
300,000 Btuh output shall have a steady state combustion efficiency of at
least 83 percent when fired at the maximum and minimum rated capacities
which are provided and allowed by the controls.]
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 systems.
**************************************************************************
[2.2.1
Atmospheric-Type Gas Burner
Atmospheric-type gas burner (under 117 kW 400,000 BTU/hr input). ANSI Z21.13.
Automatic recycling burner. ON-OFF type combustion control system.
[Interrupted] [Intermittent] pilot type ignition system, and pilot shall be
electrode-ignited natural gas 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 applicable requirements of ANSI Z21.13,
including complete gas shut-off and pilot gas. Gas pressure available:
[_____ Pa inches of water gage] [_____ kPa (gage) psig].
][2.2.2
Gas-Fired Power Burner
Gas-fired power burner (over 117 kW 400,000 BTU/hr input). MIL-B-18796.
Interrupted pilot type ignition system, and pilot shall be the
electrode-ignited natural gas 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 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. The combustion
control system shall be the [on/off] [high-low-off] [positioning]
[metering] type. 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 inches of water
gage] [_____ kPa (gage) psig].
][2.2.3
Oil-Fired Power Burner
Oil-fired power burner (under 117 kW 400,000 BTU/hr input). MIL-B-18797.
Direct electric-spark-ignited type ignition system. Burner controls and
SECTION 15514N
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