][2.2.3
Combination Gas and Light Oil-Fired Power Burner
MIL-B-18796, Class 5 - combination light oil and gas-fired. Automatic
recycling burner. The combustion control system shall be
the[high-low-off][positioning] [metering] type. Partial pre-mix type gas
burner, complete with primary air fan. [Pressure-atomizing]
[Air-atomizing; compressor or pump furnished with burner] type oil burner.
Ignition system for firing natural gas shall be interrupted pilot type,
and pilot be electrode-ignited natural gas type. Ignition system for
firing light oil shall be the [direct electric-spark-ignited type]
[interrupted pilot type, and pilot shall be [electrode-ignited [propane]
[natural] gas type] [light oil spark-ignition type]]. Design burner and
combustion control equipment for firing commercial grade number 2 fuel oil
and 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 boiler. Burner controls and
safety equipment shall conform to applicable requirements of MIL-B-18796.
Mount controls; including operating switches, indicating light, 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].
]2.3
BOILER TRIM AND CONTROL EQUIPMENT
Provide in accordance with MIL-B-17452 and MIL-B-18796. Boiler trim shall
comply with ASME BPVC SEC IV and additional appurtenances specified below.
Non-recycling control interlocks shall have the reset located on control
interlock.
2.3.1
Emergency Disconnect Switch
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NOTE: Indicate location of emergency disconnect
switch on drawings. Insert emergency switch
amperage required.
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Provide and locate on wall outside boiler room entrance or just inside
door, when boiler room door is on the building exterior to allow rapid and
complete shutdown of the boiler in the event of an emergency. Emergency
switch shall be a [_____]-amp. fuse-type safety switch. Switch shall be
red and furnished with a label indicating function of switch.
2.3.2
Provide relieving capacity for the full output of boiler installed.
Relief-valve piping shall conform to ASTM A 53, schedule 40 steel pipe and
be piped full size [to a floor drain] [to 150 mm 6 inches above floor].
2.3.3
Pressure Gage
MIL-B-17452. Provide with a scale equivalent to 1.5 time outlet water
pressure with a 150 mm 6 inch diameter. Locate one on supply water piping
and one on the return water piping.
SECTION 15515N
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