CSD-1 Controls and Safety Devices for Automatically Fired Boilers.
a.
Feedwater Regulator with Low-Water Cutoff: Regulator shall be an
approved design sized for the application. A regulator shall be
provided for each boiler. The feeder shall be so arranged that
water will be fed to the boiler automatically when the water level
in the boiler drops below a preset point and will actuate the
alarm bell when the water level reaches the low danger point. The
boiler feeder shall be arranged so that the burner and
forced-draft fan will stop whenever the water level drops below a
preset danger point. The boiler feeder shall be constructed so
that the feedwater valve and seat are isolated from the float
chamber to prevent overheating of the feed water and precipitation
of scale on either the valve or seat. Each float mechanism,
valve, and seat shall be constructed of an approved, durable,
corrosion-resistant steel alloy. Valve seats shall be removable
and renewable. The regulator shall be equipped with a large,
self-cleaning strainer. The drain valve on the regulator shall be
the gate or other straight-through type.
b.
Pump Controller with Low-Water Cutoff: Controller shall be a
design approved by the boiler manufacturer. A pump controller
shall be provided for each boiler which is used for space heating
and process steam loads or long distribution lines. Pump
controller shall control the operation of the burner, forced-draft
fan, and pump. Pump controller and low-water cutoff shall have a
float-operated mercury switch arranged to start and stop the pump
at preset boiler water levels. If the water level in the boiler
reaches the low danger point, a second mercury switch shall shut
down the burner and actuate the alarm bell.
c.
Supplementary Low-Water Cutoff: Supplementary low-water cutoff of
the [electrically operated probe type] [float activated type]
shall be provided in addition to the low-water cutoff required
above on each boiler. Supplementary low-water cutoff shall be
mounted directly in the boiler shell and shall be set below the
low-water cutoff required above.
2.3.7.2
Water Flow Interlock
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NOTE: Delete this paragraph if a hot water boiler
is not utilized.
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Hot water boiler limit controls shall be provided to include protection for
low boiler water flow and high boiler water temperature. The limit
controls shall be interlocked with the combustion control system to effect
boiler alarm and shutdown. The controls shall not allow boiler startup
unless hot water flow is proven.
2.4
PUMPS
2.4.1
Fuel Oil Pumping and Heating Sets
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NOTE: This paragraph may not be needed if the fuel
does not require heating. This paragraph should be
coordinated with section 13202 FUEL STORAGE SYSTEMS
SECTION 15569A
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