shall be integrated into controls such that when No. 2 oil is
selected, low oil temperature switch [and electric heater] [is]
[are] taken off line from oil train.
h.
Indicating lights shall also be provided for following:
1.
Limits satisfied.
2.
3.
Pilot ON.
4.
Main flame ON.
5.
Flame failure.
6.
Fuel oil ON.
7.
Natural gas ON.
i.
Indicating pilot lights shall be industrial, oil-tight
construction with push-to-test feature or "All-Pilot Lights" test
button.
2.4.9
Boiler Piping Trains
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NOTE: Delete oil heater, oil temperature switches
and oil temperature gauge for plants which will not
burn oil heavier than No. 2 fuel oil now or in the
near future. When heavy oil is burned, steam is
typically used to heat it nearly to burning
temperature and electric heat is used for trimming
(approx. 11 to 17 degrees C (20 to 30 degrees F)).
However, full capacity electric oil heating (approx.
56 degrees C (100 degrees F) rise) or other
independent heat source is needed to cold-start the
plant. Cold start capability should be provided for
at least two boilers for multiple boiler plants. If
the plant is operable on emergency power,
consideration should be given to supplying the full
capacity electric oil heaters from the emergency
source.
**************************************************************************
Piping train shall be completely prepiped, wired and mounted on boiler.
[Fuel oil and [steam] [Air] atomizing systems] [and] [natural gas] train
shall be in accordance with NFPA and FM standards and requirements and
shall include but not be limited to following items:
2.4.9.1
Fuel Oil Train
a.
NFPA 31.
b.
Adjustable fuel oil pressure regulating and relief device.
c.
Fuel oil flow control valve with characterizing adjustments to
match airflow.
SECTION 15561A
Page 38
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