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The wing tank fuel pumps are tted with pressure reducing valves to allow the center tank fuel pumps to preferentially supply the
engines when the center tank pumps are operating. This ensures that the center tank is emptied rst.
Wing tank fuel is drawn from inner cells. When fuel quantity in either inner cell reaches a preset level, all outer tank transfer valves
open to allow fuel from the outer cells to ow into the inner cells.
A crossfeed valve is located between the left and right fuel systems. It allows both engines to be fed from one wing tank to balance
the fuel load, or one engine to be fed from both sides to utilize all the fuel in a single engine situation.
A dedicated APU pump is located in left fuel manifold and automatically supplies fuel for APU if main pumps are not energized.
Controls and indications
ECAM FUEL page
This page shows a schematic diagram of fuel system operation.
The total fuel on board (FOB) is displayed, along with quantities in each tank
and cell. Wing transfer valves are represented as doors which open when a valve
opens.
Tank pumps are represented by boxes:
Pump is working
Pump is commanded OFF by system logic
Pump is manually selected OFF
Circles represent the position of engine and APU LP valves and crossfeed valve.
Fuel used by each engine is displayed above corresponding engine valve. It is shown in amber when engine is not running, and
automatically resets to zero at engine start.
Fuel temperature readouts are displayed below each wing tank.
A319/320/321
Systems Manual
Phoenix Simulation Software P 75
REV 01 SEQ 001 Fuel system
Controls and indications (continued)
FUEL control panel (overhead)
Wing Pumps ƒ MODE SEL
„ X FEED
‚ Center pumps
Wing Pumps
The pump buttons control wing tank pumps.
NO LIGHT: Fuel pump is energized.
OFF: Fuel pump is deactivated.
“FAULT”: Amber FAULT light is illuminated if tank fuel quantity is low. It is inhibited when a pump is selected off.
‚ Center pumps
The pump buttons control center tank pumps.
NO LIGHT: Fuel pump is enabled and operates when commanded by system logic.
OFF: Fuel pump is deactivated.
ƒ MODE SEL
Selects automatic or manual operation of center tank pumps.
NO LIGHT: Automatic, center pumps work when commanded by system logic.
MAN: Center pumps are controlled by position of CTR TK PUMP buttons.
„ X FEED
Controls the position of fuel crossfeed valve.
NO LIGHT: Default, the valve is closed.
ON: Crossfeed valve opens.
“OPEN” light is illuminated green when crossfeed is selected ON and crossfeed valve fully opens.
A319/320/321
Systems Manual
Phoenix Simulation Software P 76
REV 01 SEQ 001 Powerplant
Controls and indications
The engine startup controls and indicators include engine panel on the central pedestal, manual engine start panel on overhead,
Engine/Warning Display (upper ECAM, see dedicated chapter) and ECAM ENG page of the Systems Display.
Engine panel
The engine panel is located on central pedestal. It contains engine MASTER switches for
both engines, and MODE selector with three positions, CRANK, NORM and IGN/START. This
panel is used for initiating automatic engine startup and shutdown sequences.
Manual engine start panel
This panel located on the overhead is used for manually starting up the engines. It includes two guarded
pushbuttons which select manual startup mode.
ECAM ENG page
The Systems Display ENG page is automatically displayed during engine startup,
and can be manually called up using ECAM control panel. It includes the following:
• Fuel used per engine readouts,
• Oil quantity gauges,
• Oil pressure gauges,
• Oil temperature readouts,
• Engine nacelle temperature readouts,
• N1 and N2 vibration readouts.
Engine startup requirements
Engine startup procedure requires supply of fuel, electrical power, and bleed air. Electrical power and bleed air can be provided by
starting the APU or connecting the external power. If external power is used, the X BLEED switch on the AIR COND panel must be
moved from AUTO to OPEN position to provide bleed air for right side engine.
Without electrical power or bleed air, the engines WILL NOT START.
Automatic startup
The automatic startup sequence is performed for each engine by following steps:
• Rotate MODE selector to IGN/START position, this identies engine start.
• Move desired engine MASTER switch to ON position. The automatic startup sequence initiates.
• After engine is started, return MODE selector to NORM.
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PSS A319/A320/A321 Systems Manual 系统手册(28)
