17
When the Mode Selector switch is in the Manual
position all oatswitches, except the high fuel level
oatswitch are over-ridden, and either position
(Alternate or Both) may be selected. e pumps will
continue to run until Switch #1 is returned to the O
or Auto position or if a high fuel condition occurs.
For standard duplex operation, the Duplex switch
should be in the Alternate position and Mode Selec-
tor switch should be in the Auto position. Pump #1
will then start at 50% level and stop at the 90% level.
e next time fuel drops back to the 50% level Pump
#2 will start and then stop at the 90% level. Continu-
ing operation alternates between Pump #1 and Pump
#2. When the fuel drops to the 25% level, both pumps
will run simultaneously until the fuel level returns to
the 90% fuel level.
Operation: e control
switch should normally
be in the Auto position
and the Power Available
L.E.D. should be illumi-
nated. e level controller
is set to pump the tank to
virtually empty. ere-
fore, normally the tank
is empty and the Tank
Empty L.E.D. is illumi-
nated. If the adjacent Day
Tank should overll and
overow, oil will ow from the overow line of the
Day Tank to the inlet port of the overow-return
tank. Above empty level, oat switch FS3 will close.
At 20% level in the overow-return tank, oat switch
FS2 will close, activating the overow-return pump
which is installed on the tank. e Pump Start L.E.D.
will illuminate and the tank will be pumped-down
to empty. At empty level, oat switch FS3 will open
and stop the pump. If the level in the overow-re-
turn tank should continue to rise above the pump
start level, oat switch FS1 will close at the 30% level
activating the “high fuel level” alarm indicator and
remote signal contacts.
overflow -
return tank,
optIon 383
Day Tank operation is
automatic and the day
tank motor may start at
any time! After a motor
thermal overload reset
the motor may restart at
any time!
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