7-2
Copyright 2017 Cummins Inc.
FUEL TRANSFER PUMP
The fuel transfer pump and control are available as
an option when a sub-base fuel tank is provided.
The automatic control operates the fuel pump to
maintain a reservoir of fuel in the sub-base tank.
This section explains functions of the control panel
lamps, components and operation/testing of the
day tank fuel control system.
Control Panel Switches and Indicators
The following paragraphs describe the operation of
the control switches and indicators.
Indicators:
POWER: indicates that AC power is available
to the control.
PUMP: indicates that the fuel pump is running.
It will go on and off as fuel is pumped to main-
tain the fuel tank level.
CRITICAL HIGH: indicates that the fuel has
reached an abnormally high level. It indicates a
possible failure of the ”pump-off” float gauge in
the sub-base tank. The lamp will turn off when
the fuel level drops to normal.
LOW FUEL SUPPLY TANK: indicates that the
fuel level in the main fuel tank has dropped be-
low the customer set low fuel level. This signal
is used by the fuel system control to stop the
operation of the fuel transfer pump to prevent
pump damage. The control will enable the fuel
transfer pump operation after tank fuel level is
restored.
RUPTURE BASIN: indicates that the fuel has
flooded the safety basin surrounding the fuel
tank. The basin float switch turns off the fuel
pump. The pump cannot function again until
the basin is drained of fuel. Possible cause,
leak in fuel tank.
Switches:
ON: This switch activates the control.
OFF: This switch disables the control for rou-
tine maintenance to the tank system without
disrupting the control.
TEST: This switch will activate the pump for as
long as the switch is in the Test position. All
alarm functions will operate accordingly.
Pump-on and pump-off float switches will re-
main de-energized.
SYSTEM TEST: This switch will test all front
panel lamps and activate pump/motor for as
long as the switch is in the System Test posi-
tion. All alarm relays will not activate but will
maintain their original state.
RESET: This switch will reset the control sys-
tem after a latched alarm event.
Operation
The following steps describe how to operate the day
tank controller.
1. Activate the control ON switch for automatic
operation. The PUMP light will come on and the
pump will fill the tank. The level of fuel in the
tank will be automatically kept between a set of
pump-on and pump-off float gauge switches.
2. The PUMP light indicates when the pump is
running. It will go on and off as fuel is pumped to
maintain the proper level in the tank.
To Next Page
Loading...