Simplex STS DAY TANK, Руководство пользователя

Страница: 17 / 31

High Level
Fill Disabled
Fill Test
Pushbutton
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 operation mode, High Level
indicates that fuel level has reached or exceeded 95% capacity.
The pump/motor is de-energized and will re-main locked-out
until the Day Tank fuel level is decreased to 90% capacity or
less. The High Level L.E.D. will remain illuminated until reset
by the operator regardless of Day Tank fuel level. If a High
Level Alarm condition occurs and the Day Tank fuel level is
reduced to normal levels the High Level L.E.D. will remain
illuminated until it is reset by the operator. The operator must
place the Day Tank mode selector switch in the Off position
and then return it to the Manual or Automatic position to reset
the High Level failure. When High Level is initiated while in
Automatic Mode the Day Tank will continue to operate
normally and cycle from 50 to 90% but the High Level L.E.D.
will remain illuminated until it is reset. When the High Level
mode is initiated while in Manual Mode the Day Tank
pump/motor will cycle between the 90% and 95% levels as
determined by fuel level sensors FS3 and FS4. After the
condition is corrected and the control circuitry is returned to
Auto the pump/motor will resume normal operation and cycle
between 50% and 90%. Fuel level sensors FS1-FS3 (Low Fuel
Level Alarm, Fill Start, and Tank Full, respectively) have
normally closed contacts. FS4 (High Level Alarm) is the only
fuel level sensor with normally open contacts.
The Fill Test pushbutton
is a momentary type. It
may be used to provide
a quick verification of
overall pump/motor/fuel
level sensor operation
when the system is in
the Auto mode. When
the mode selector switch
is placed in the Off
position, the Fill Test
pushbutton is disabled.
When the mode selector
switch
is in the
Automatic position, the
Fill Test pushbutton is
enabled.
14