assembly for control.] Each engine-generator set provided with
weatherproof enclosures shall have its day tank mounted within the
enclosure. The fuel fill line shall be accessible without opening the
enclosure.
2.3.5.1
Capacity, Standby
Each day tank shall have capacity [as shown] [to supply fuel to
the engine
for an uninterrupted [4-hour] [_____] period at 100% rated load
without
being refilled, plus any fuel which may be returned to the main
fuel
storage tank. The calculation of the capacity of each day tank
shall
incorporate the requirement to stop the supply of fuel into the
day tank at
90% of the ultimate volume of the tank.]
2.3.5.2
Drain Line
Each day tank drain line shall be accessible and equipped with a shutoff
valve. Self supporting day tanks shall be arranged to allow drainage into
a 305 mm 12 inch tall bucket.
2.3.5.3
Local Fuel Fill
Each local fuel fill port on the day tank shall be provided with a screw-on
cap.
2.3.5.4
Fuel Level Controls
a.
Each day tank shall have a float-switch-assembly to perform the
following functions:
(1) [When the main storage tank is located higher than the day
tank, open the solenoid valve located on the fuel supply line
entering the day tank and start the supply of fuel into the day
tank] [Start the supply of fuel into the day tank] when the fuel
level is at the "Low" level mark, 75% of the rated tank capacity.
(2) [When the main storage tank is located higher than the day
tank, stop the supply of fuel into the day tank and close the
solenoid valve located on the fuel supply line entering the day
tank] [Stop the supply of fuel into the day tank] when the fuel
level is at 90% of the rated tank capacity.
(3) Activate the "Overfill Fuel Level" alarm at 95% of the rated
tank volume.
(4) Activate the "Low Fuel Level" alarm at 70% of the rated tank
Capacity.
(5) Activate the automatic fuel supply shut-off valve located on
the fill line of the day tank and shut down the fuel pump which
supplies fuel to the day tank at 95% of the rated tank volume.
The flow of fuel shall be stopped before any fuel can be forced
into the fuel overflow line.
2.3.5.5
Arrangement
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NOTE: Select between integral and self supporting
SECTION 16264A
Page 33
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