13
automatIC
operatIon
Never use a Day Tank to
transfer or store Class
I, ammable, or liquids
with a ash point less
than 100°F. Ignition of
fuel can cause severe
personal injury or death!
Day Tanks are approved
for use with combustible
liquids (Class II or Class
III liquids) with a ash
point at or above 100°F
provided they are stored
below the ash point am-
bient temperature!
by the prime mover. Dry contacts for Low Fuel Level,
High Fuel Level, Leak Alarm, and Not In Auto relays
are wired to terminals 1-12 of terminal block TB‘A’
for customer use. e customer may utilize these
contacts to annunciate low fuel level and high fuel
level. Contacts are rated at the following specica-
tions: 5A@30VDC, 5A@125VAC.
e Day Tank operator selects the Day Tank oper-
ating mode via the three position Day Tank mode
selector toggle switch. e operator may choose
Automatic, Manual, or O. To alert the Day Tank op-
erator, the red Not In Auto lamp ashes continuously
when the Day Tank mode selector switch is not in the
Auto position. is is the only ashing lamp on the
control panel. Normally the mode selector switch is
le in the automatic position. Aer initial Day Tank
installation, priming, and ll, the controller printed
circuit board will energize and de-energize the Day
Tank pump/motor as determined by the opening and
closing of the fuel level sensors (25%-FS1, 50%-FS2,
90%-FS3, 95%-FS4). As the Day Tank continues to ll
and the fuel level reaches 50% capacity the Normal
Operating Range L.E.D. will be illuminated. e
Day Tank pump/motor will de-energize when the
fuel level reaches 90% (the Normal Operating Range
L.E.D. is extinguished and the Normal Maximum
L.E.D. is illuminated). During normal operation fuel
is consumed by the prime mover and the Day Tank
cycles between 50 and 90% capacity, energizing and
de-energizing the motor/pump as necessary. If the
pump/motor continues to run past the 90% capacity
level, normally open fuel level sensor FS4 will close
when 95% capacity is reached. At this point the High
Level Alarm L.E.D. will be illuminated and the pump
will de-energize.
A High Level alarm causes the Day Tank to enter a
new mode of operation dependent on the position of
the mode selector switch. Regardless of the opera-
tion mode, High Level indicates that fuel level has
reached or exceeded 95% capacity. e pump/motor
is de-energized and will remain locked out until the
Day Tank fuel level is decreased to 90% capacity or
less. e High Level L.E.D. will remain illuminated
until reset by the operator regardless of Day Tank
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!
HIgH level fIll
DISableD
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