[capacity sufficient to supply the engine for [_____] hr continuously at
100 percent rated load without being refilled].]
2.3.6.1
Drain Line
Each day tank drain line shall be equipped with a shutoff valve and be
arranged to allow drainage into 220 liter 55 gal drums.
2.3.6.2
Local Fuel Fill
Each local fill port shall have a [screw-on cap][hinged, fill cap]. An air
vent with brass screen shall be provided so that the day tank does not
develop a vacuum leading to the collapse of the day tank as the system
empties.
2.3.6.3
Fuel Level Limit Devices
a.
Each day tank shall be provided with a fill level float switch
assembly device to:
(1) Initiate refueling of the day tank at the low level mark,
(e.g., 30 percent volume remaining).
(2) Stop refueling of the day tank at the high level mark, (e.g.,
90 percent volume).
b.
Each day tank shall be provided with a separate level-sensing
device to activate alarms at day tank overfill and day tank empty.
Day tank empty shall indicate at 20 percent volume remaining.
Day tank overfill shall indicate at 95 percent volume. See
paragraph ALARM PANEL for further function requirements.
2.3.6.4
Redundant Fuel Shutoff
To stop fuel flow to the day tank, an automatic shutoff valve shall be
provided on the fill line of the day tank and an automatic safety device
shall be provided to stop the pump supplying fuel to the day tank. The
valve and the safety device shall be activated at the overfill level as
defined in paragraph SAFETY SYSTEM, and shall respond before any fuel is
forced out of the fuel overflow line.
2.3.6.5
Arrangement
The day tank shall be positioned and arranged so that fuel level in the day
tank at the day tank empty level is above the suction port of the
engine-driven fuel pump. The day tank overflow connection shall be
positioned and arranged so that the highest possible fuel level in the day
tank is below the fuel injectors. The fuel supply line from the day tank
to the engine connections shall be welded steel pipe. A water drain shall
be provided at the low point of the day tank.
2.3.7
Fuel Supply System
**************************************************************************
NOTE: Delete the second sentence and use
UFGS-13202A FUEL STORAGE SYSTEMS to specify the fuel
supply system if diesel engines are specified.
Delete the first sentence and use UFGS-02556A GAS
DISTRIBUTION SYSTEM and UFGS-15190A GAS PIPING
SECTION 15133A
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