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EFFECTIVITY Page 174
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28 - FUEL SYSTEM
28-25-00 REFUEL/DEFUEL SYSTEM PRESENTATION
CONTENTS:
R/D Coupling
Refuel Valves
Diffusers
Air Inlet and Drain Valves
Defuel/Transfer Valve
Pressure Relief Valve
High Level Sensor
Self Examination
TMUFUEF01 LEVEL 1
EFFECTIVITY 28-25-00 Page 1
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 175
ALL
REFUEL/DEFUEL SYSTEM PRESENTATION
R/D COUPLING
A single pressure refuelling coupling is positioned
under the right hand wing leading edge. The
Refuel/Defuel coupling supplies the center tank and
Outer cells. When the Outer cells are full, fuel
overflows into the Inner cells via a spill pipe.
The RH coupling is standard while the LH coupling shown
is optional.
When not in use, the coupling is fitted with a pressure
blanking cap.
REFUEL VALVE
The fuel flow into each tank is controlled by a solenoid
operated Refuel valve.
All Refuel valves are identical and interchangeable.
They may be manually operated, by pushing a plunger
on the valve itself.
DIFFUSERS
Diffusers, installed on the Refuel lines, diffuse fuel
into the tanks with minimum turbulence and
electrostatic build up.
AIR INLET AND DRAIN VALVES
The Air Inlet valve installed on the refuel line,
admits air into the refuel line so that the line may
drain. A drain valve drains fuel from the refuel line
into the inner cell.
The Air Inlet Valve is near the inner cell Refuel
Valve.
The fuel is free to flow through the drain valve except
under refuel line pressure.
DEFUEL/TRANSFER VALVE
The Defuel/Transfer valve is controlled from the
Refuel/Defuel panel.
When open, it connects the Refuel line and the Engine
supply line for defuelling.
PRESSURE RELIEF VALVE
The pressure relief valve will relieve fuel into the
Right hand wing tank in the event of a center tank
refuelling overflow.
HIGH LEVEL SENSOR
One high level sensor is installed in the center tank
and in each Inner cell. When immersed in fuel, the
related Refuel valve closes.
TMUFUEF01-T01 LEVEL 1
EFFECTIVITY 28-25-00 Page 2
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 176
ALL
REFUEL/DEFUEL SYSTEM PRESENTATION
TMUFUEF01-P01 LEVEL 1
EFFECTIVITY 28-25-00 Page 3
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 177
ALL
SELF EXAMINATION
The Inner cell is refuelled only when:
A - Center tank is full.
B - Outer cell is full.
C - Outer cell is empty.
Refuel valves may be actuated:
A - Electrically only.
B - Manually only.
C - Electrically or manually.
TMUFUEF01 LEVEL 1
EFFECTIVITY 28-25-00 Page 4
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 178
ALL
28 - FUEL SYSTEM
28-25-00 REFUEL/DEFUEL CONTROL PANEL
CONTENTS:
Multi-Tank Indicator
High Level Lights
Refuel Valve Selectors
Mode Selector
Open Light
Test Switch
Preselected
Actual
Rocker Switch
End Light
TMUFUEP01 LEVEL 1
EFFECTIVITY 28-25-00 Page 1
Feb 30/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 28 FUEL SYSTEM
UF94200
EFFECTIVITY Page 179
ALL
REFUEL/DEFUEL CONTROL PANEL
MULTI-TANK INDICATOR
The Multi-Tank Indicator displays the quantity of fuel
in each wing and the Center Tank.
HIGH LEVEL LIGHTS
A blue HI LVL light for each tank comes on when the
associated high level sensor is covered. The
corresponding refuel valve will close.
REFUEL VALVE SELECTOR
There is one Refuel Valve selector per tank. For an
automatic refueling, these Refuel Valves selectors
remain in the NORM position. For defuelling the valves
will not open. Selector set to open : the Refuel valve
operation depends on the MODE SELECTOR position. With
the Mode Selector in the Refuel position, each Refuel
valve closes when the associated high level is
reached.When the REFUEL VALVE selector is set to the
SHUT position, the Refuel valve is closed. This is
independent of the MODE SELECTOR position.
MODE SELECTOR
With the MODE SELECTOR at OFF, the Refuel Valves are
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