Learjet 60 - Sppr Ba%3 Switch; VENT OPEN Light

Learjet 60

Pilot's Manual
The PARTIAL position of the Refuel Selector
switch is used to fill the
wings first and then the fuselage . This is
useful when full wings and
less than full fuselage fuel is desired . When PARTIAL is selected and
the vent valve opens, the fuselage tank solenoid valve will be con-
trolled by the wing high-level float switches . When the wings are full,
the wing high-level float switches complete the circuit to open the fu-
selage tank solenoid
valve . When the solenoid valve opens, the fuse-
lage tank shutoff
valve will open and admit fuel to the fuselage tank .
SPPR BATT SWITCH
The BATTON-OFF switch, on
the refuel control panel, allows opera-
tion of the single-point pressure refuel
system without the need to en-
ter the cockpit in order to energize
aircraft power . When the switch is
set to ON, DC power from the
aircraft's #2 battery is applied to
the
SPPR control circuits .
FUS FULL LIGHT
The amber FUS
FULL light, on the refuel control
panel, will illumi-
nate
whenever the fuselage tank float switch
actuates . The light illu-
minates to
alert the operator that refuel operations
should have auto-
matically
terminated . If fuel flow continues with the light
illuminated,
fueling
operations should be immediately terminated
.
VENT OPEN LIGHT
The green VENTOPEN light, on
the refuel control panel,
will illumi-
nate whenever the fuselage tank
vent valve opens . The light is
operat-
ed by a microswitch in the valve .
The circuit for the fuselage
tank so-
lenoid valve is
wired through this switch to prevent
filling the
fuselage
tank until the vent valve opens .
PM-123

2-41
Original