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Cylinder data
- capacity : 3260 l (115 cu ft)
- nominal charge : 1850 psig
The cylinder is placed in a cradle and secured by a
quick disconnect metallic clamp designed to resist to
high crash loads.
PRESSURE REGULATION
The pressure regulator transmitter is directly
connected to the cylinder. It consists of a high
pressure stage with an integrated pressure transducer
for ECAM indication and a low pressure stage.
The pressure regulator regulates low pressure
at 78 ± 8 psig.
OVERPRESSURE PROTECTION
High pressure and low pressure protection is achieved
by safety devices consisting of a high pressure safety
outlet and a low pressure safety outlet.
The high pressure safety outlet is of a frangible disk
type whereas the low pressure safety outlet is a
pressure relief valve.
The rupture of the frangible disk is set at a cylinder
pressure of 2500 to 2775 psig.
The pressure relief valve limits the low pressure
oxygen supply to 175 psig.
OVERPRESSURE INDICATION
An overboard green discharge indicator is connected
to the high pressure safety outlet and to the low
pressure safety outlet.
In case of overpressure, the green disk blows out and
a yellow indicator is displayed showing that the
cylinder has discharged or the pressure relief valve
has opened.
SUPPLY VALVE
A supply valve enables downstream distribution by crew
action on the CREW SUPPLY pushbutton on the oxygen
panel.
Electrical supply to the valve is applied only for 1.5
seconds corresponding to the operating time of the
valve.
DISTRIBUTION
A pressure switch and a test port are connected on the
low pressure manifold.
The low pressure switch indicates a low pressure
detection in the LP manifold.
It activates a message on the ECAM/DOOR/OXY page.
Pressure switch setting : 50 psig.
Test port pressure lower than 145 psig.
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 35 OXYGEN
UF94200
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CREW OXYGEN SYSTEM PRESENTATION
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SELF EXAMINATION
Can the cylinder pressure be checked when there is
no electrical power ?
A - YES
B - NO
What indicates an overboard discharge ?
A - A warning on the oxygen control panel 21
VU.
B - The direct reading pressure gauge on the
oxygen cylinder.
C - A yellow indicator.
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EFFECTIVITY 35-10-00 Page 4
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 35 OXYGEN
UF94200
EFFECTIVITY Page 8
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35 - OXYGEN
35-10-00 CREW OXYGEN SYSTEM CONTROLS AND
INDICATIONS
CONTENTS:
HP In Place Visual Indication
Manual Isolation
HP Indication
LP Control
LP Warning
TMUOXYE01 LEVEL 1
EFFECTIVITY 35-10-00 Page 1
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 35 OXYGEN
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EFFECTIVITY Page 9
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CREW OXYGEN SYSTEM CONTROLS AND INDICATIONS
HP IN PLACE VISUAL INDICATION
The direct reading pressure gage is used to read the
cylinder pressure.
MANUAL ISOLATION
The manual ON/OFF valve allows cylinder isolation.
The pressure gage reading is available whether the
manual valve is open or closed.
HP INDICATION
The HP indication appears on the DOOR/OXY ECAM page.
LP CONTROL
The solenoid supply valve is supplied for a short time
only, corresponding to the valve operating time.
This valve is used to isolate the cylinder from the
rest of the circuit on ground only.
LP WARNING
The REGULATOR LOW PRESSURE message appears amber on
the ECAM DOOR/OXY page in low pressure conditions only.
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 35 OXYGEN
UF94200
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TMUOXYE01-P01 LEVEL 1
CREW OXYGEN SYSTEM CONTROLS AND INDICATIONS
EFFECTIVITY 35-10-00 Page 3
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 35 OXYGEN
UF94200
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TMUOXYE01 LEVEL 1
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