2.5.1.7
Aspirating System
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NOTE: Provide aspirating system only for boilers in
which the expected furnace pressure exceeds 1245 Pa
5 inches water.
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Provide an air aspirating system for fuel oil atomizer guide pipes to
prevent blowback of hot furnace gases. Aspirating system shall use
approximately [_____] L/s scfm of [_____] kPa (gage) psig compressed air.
2.5.1.8
Piping
Provide piping and flexible hoses for guide pipe purge [and aspirating]
system[s]. Air from forced draft fan shall be used for guide pipe purging
during normal operation.
2.5.1.9
Metal Parts
Metal parts exposed to radiant heat, including atomizer shield, shall be of
stainless steel or other approved alloy.
2.5.1.10
Fuel Oil Control Valve
Fuel oil will be supplied at [_____] kPa (gage) psig and [_____] degrees C F
at the inlet of the fuel piping train. Size fuel oil automatic control
valve for 103 kPa 15 psi differential pressure.
2.5.1.11
Fuel
ASTM D 396, Grade No. [_____].
2.5.1.12
Burner Blower Fan For Oil Fired Burner
Provide fan fully integrated with and mounted on windbox. Provide an inlet
silencer, when required, to ensure operation at noise level below 85 dBA as
specified in Section 15070N MECHANICAL SOUND VIBRATION AND SEISMIC CONTROL.
2.5.1.13
Electric Motor
Motor shall be [two speed,] [_____] volt, [_____] phase, 60 Hz, [totally
enclosed, non-ventilated] [totally enclosed, fan cooled], not less than
[_____] kW hp as specified in paragraph entitled "Motors and Drives."
2.5.2
Flame Safeguard Controls
Provide a complete system of valves, interlocks and controls in accordance
with NFPA 8501 and as approved by Factory Mutual Engineering and Research.
2.5.2.1
Fuel Oil Train
Provide fuel oil train consisting of [steam] [air] atomizing oil gun,
auxiliary [steam] [air] atomizing oil gun for changing guns without a
shutdown, fuel oil control valve, two safety shutoff valves, recirculation
valve, strainer, and flexible hose connections to oil burner. Provide low
oil pressure and low atomizing air pressure switches, and all other safety
interlocks and devices as required. Provide in panel mounted on burner
package the following gages. Gages shall be 150 mm 6 inch with white
SECTION 15501N
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