A380
TECHNICAL TRAINING MANUAL
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
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A380 TECHNICAL TRAINING MANUAL
LEVEL II&III - ATA 21 AIR CONDITIONING SYSTEM
Pax Comfort - General Standard Systems
Air Conditioning System Description (2) . . . . . . . . . . . . . . . . . . . . . . 2
Air Conditioning System OPS/CTL & IND (2) . . . . . . . . . . . . . . . . . . 8
Supplemental Cooling (Option)
Supplemental Cooling System Description (2) . . . . . . . . . . . . . . . . . 16
Supplemental Cooling OPS/CTL & IND (2) . . . . . . . . . . . . . . . . . . . 20
Aircraft System Protection
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Aircraft System Protection Description (2) . . . . . . . . . . . . . . . . . . . . 28
Aircraft System Protection OPS/CTL & IND (2) . . . . . . . . . . . . . . . 32
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
TABLE OF CONTENTS
Jan 13, 2009
Page 1
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM DESCRIPTION (2)
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Architecture/Description
The air conditioning system makes sure that the air temperature, freshness
and air pressure are comfortable for passengers and crew during all
operating conditions in different cockpit and cabin zones. The air
conditioning system controls the airflow in the main passenger deck, the
upper passenger deck, the cockpit and the lower deck cargo compartments
with a mix of fresh air and re-circulated air.
The air conditioning system is fully automatic. It supplies continuous air
renewal, and maintains a constant selected temperature in the cockpit
and cabin zones. Air from the air-conditioning is also used for cargo
ventilation.
The bleed air system supplies compressed air from the main engine
compressors or from the APU compressor to the air conditioning system.
Flow Control Valves adjust the quantity of the bleed air that flows from
the engines to the Air Generation Units (AGUs) and the trim air system.
Two AGUs, also called Air Condition Packs, lower the temperature and
remove water from the hot bleed air before it flows to the air distribution
system.
A mixer unit combines cold air from the AGUs with recycled air from
the cockpit and cabin.
The cockpit and cabin air re-circulate to reduce the bleed air demand
from the AGUs.
There are four ventilation fans that re-circulate cabin air to the mixer
unit. These fans are also referred to as primary fans.
The trim air system adjusts the temperature of the air in each cockpit and
cabin zone. Temperature is adjusted by adding hot air from the bleed
system to air from the mixer unit. Hot air is added via two Trim Air
Pressure Regulating Valves (TAPRVs, also called "hot air valves") and
several Trim Air Valves (TAVs).
Two emergency ram air inlets installed on the belly fairing, ventilates
the cockpit and cabin, in the event that both AGUs fail.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
The RAM AIR P/B on the AIR panel activates the emergency ram air.
When set to ON, air from outside the aircraft flows through two
emergency ram air inlets, directly to the mixer unit, to continue ventilating
and cooling both the cockpit and cabin.
The emergency ram air supply system, supplies the aircraft with ambient
air when the two AGUs are unserviceable during flight.
Independent air sources supply the air conditioning system, when the
aircraft is on the ground.
The preconditioning can be done by:
- A ground air supply unit through the 4 Low Pressure (LP) ground
connectors. Air supplied through the LP connectors is directly sent to the
air distribution system.
- A ground air supply unit through the 3 High Pressure (HP) ground
connectors.
- The APU bleed air supply.
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 2
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A380 TECHNICAL TRAINING MANUAL
ARCHITECTURE/DESCRIPTION
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 3
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Preconditioning with Low Pressure
On ground, with packs off, the mixer unit receives conditioned air from
air conditioning units connected to the LP ground inlets.
The air conditioning unit blows the air into the mixer unit. Then the air
goes to the different zones.
NOTE: Note: do not operate AGUs.
Human factor point:
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WARNING: MAKE SURE THAT THE FWD AVIONICS
COMPARTMENT ACCESS DOOR (811, LH SIDE OF
THE FWD FUSELAGE) IS OPEN, WITH A WARNING
NOTICE ATTACHED TO IT.
THE WARNING NOTICE MUST TELL PERSONS NOT
TO CLOSE THE DOOR. IF THE DOOR IS CLOSED,
ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT
CAN OCCUR.
Human factor points:
CAUTION: - MAKE SURE THAT THE GROUND AIR SUPPLY UNIT
IS NOT TOO MUCH NEAR THE AIRCRAFT AND THAT
THE ENGINE EXHAUST PIPE OF THE GROUND AIR
SUPPLY UNIT POINTS AWAY FROM THE AIRCRAFT.
HEAT FROM THIS UNIT AND FROM THE EXHAUST
CAN CAUSE DAMAGE TO THE AIRCRAFT
STRUCTURE.
- DO NOT USE CONDITIONED AIR FROM THE AGUs
AT THE SAME TIME AS AIR FROM THE LOW
PRESSURE GROUND UNITS. THERE IS A RISK OF
DAMAGE TO THE CHECK VALVES.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 4
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A380 TECHNICAL TRAINING MANUAL
PRECONDITIONING WITH LOW PRESSURE
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 5
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Preconditioning with High Pressure
Preconditioning by HP Ground Cart
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The preconditioning can be done by connecting a HP ground cart to
the HP connectors.
NOTE: The AGUs can operate in this condition.
Through these connectors the compressed air is supplied to the
cross-bleed duct.
The hot bleed air flows through the flow control valves, then it is
possible to start the AGUs.
There are two Flow Control Valves (FCVs) per AGU, to adjust
quantity of bleed air.
Each FCV controls half of the total flow.
The AGU controllers control the position of the flow control valves.
If the FCVs close, the flow of hot bleed air to the air conditioning
packs and trim air valves stops.
Each group of two FCVs are controlled and monitored by:
- Air Generation System (AGS) application hosted in 4 CPIOMs,
- two Full Digital Air generation unit Controllers (FDACs).
The PACK 1 and PACK 2 P/BSWs installed on the AIR COND panel
(1225VM) on the overhead panel, show if there is a failure.
These P/BSWs can be used to stop the flow of air through an AGU.
The AIR FLOW selector (PACK FLOW selector) on the AIR COND
panel (1225VM) controls the flow of hot bleed air through the air
conditioning packs. It adjusts the flow of air with the flow control
valves. The flow selector has a MAN, LO, NORM and HI position.
The air-management function of the AGS application is in operation
in the LO, NORM and HI positions.
Human factor points:
CONTAMINATION CAN CAUSE THE SMELL OF
OIL IN THE CABIN AND MAKE THE AIR
CONDITIONING PACKS UNSERVICEABLE.
- MAKE SURE THAT THE GROUND AIR SUPPLY
UNIT IS NOT TOO MUCH NEAR THE AIRCRAFT
AND THAT THE ENGINE EXHAUST PIPE OF THE
GROUND AIR SUPPLY UNIT POINTS AWAY FROM
THE AIRCRAFT. HEAT FROM THIS UNIT AND
FROM THE EXHAUST CAN CAUSE DAMAGE TO
THE AIRCRAFT STRUCTURE.
Preconditioning by using APU bleed system
The preconditioning can be done by the APU.
The APU air system supplies bleed air to the aircraft pneumatic
system. The AGUs are users of pneumatic system.
NOTE: The AGUs can operate in this condition.
Human factor point:
WARNING: MAKE SURE THAT THE FWD AVIONICS
COMPARTMENT ACCESS DOOR (811, LH SIDE OF
THE FWD FUSELAGE) IS OPEN, WITH A WARNING
NOTICE ATTACHED TO IT.
THE WARNING NOTICE MUST TELL PERSONS
NOT TO CLOSE THE DOOR. IF THE DOOR IS
CLOSED, ACCIDENTAL PRESSURIZATION OF THE
AIRCRAFT CAN OCCUR.
CAUTION: - MAKE SURE THAT THE GROUND AIR SUPPLY
UNIT IS FREE FROM OIL CONTAMINATION. OIL
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 6
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A380 TECHNICAL TRAINING MANUAL
PRECONDITIONING WITH HIGH PRESSURE - PRECONDITIONING BY HP GROUND CART & PRECONDITIONING BY USING APU
BLEED SYSTEM
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 7
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
General
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On the AIR panel, the APU BLEED PBSW operates the APU bleed
valve. When the APU BLEED PBSW is pushed, the APU bleed valve
opens, and the blue ON light indication comes on. Then, a FAULT light
shows an APU bleed leak detection (associated with an ECAM alert).
On the same panel, a three-position X BLEED selector SW controls the
three X bleed valves. In the AUTO position, the X bleed valves are
automatically controlled. In the CLOSE position, the X bleed valves are
selected closed, whereas in the OPEN position, they are selected open.
The center X bleed valve is used to isolate the LH and the RH engine
bleed air systems from each other. The two other X bleed valves are used
to isolate the outer engine bleed air systems from each other.
The CKPT rotary selector permits to adjust the temperature for the cockpit
zone. In a same way, the CABIN rotary selector allows to adjust the
temperature for the cabin zone. The PURS SEL position of the CABIN
selector enables the cabin zone temperature to be only controlled from
the Flight Attendant Panel (FAP).
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 8
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A380 TECHNICAL TRAINING MANUAL
GENERAL
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 9
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Preconditioning Of The A/C Using Low Pressure Ground
Connection
The cockpit temperature, the highest and lowest temperatures of the MD
& UD are displayed on the ECAM COND page.
Note that the green arrows from the mixer unit to the cockpit, UD and
MD, are permanent part of the ECAM COND page.
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WARNING: MAKE SURE THAT THE FWD AVIONICS ACCESS
DOOR 811 IS OPEN WITH A WARNING PLACARD
ATTACHED TO IT.
THE WARNING NOTICE MUST TELL PERSONS NOT
TO CLOSE THE DOOR. THIS PREVENTS
ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.
CAUTION: DO NOT USE CONDITIONED AIR FROM THE PACKS
AT THE SAME TIME AS AIR FROM THE
LOW-PRESSURE GROUND UNITS. THIS CAN CAUSE
DAMAGE TO THE CHECK VALVES.
MAKE SURE THAT THE GROUND AIR-SUPPLY UNIT
IS NOT TOO NEAR THE AIRCRAFT AND THAT THE
ENGINE EXHAUST PIPE OF THE GROUND
AIR-SUPPLY UNIT POINTS AWAY FROM THE
AIRCRAFT. HEAT FROM THIS UNIT AND FROM THE
EXHAUST CAN CAUSE DAMAGE TO THE AIRCRAFT
STRUCTURE.
When on ground, the preconditioning of the A/C can be done by using
the LP connections. Air from the ground carts is blown through the LP
ground connections directly into the mixer unit and then distributed into
the whole A/C. No bleed air is required. The temperature selectors have
to effect on the temperature control, as the output air temperature is set
on the ground carts themselves.
Air from the cabin is recirculated by the HP and the LP recirculation
fans. With all the HP fans operational, only two green arrows are
displayed on the ECAM COND page (from the lower deck to the mixer
unit). If a failure occurs the related fan will be displayed in amber and
the other ones in green.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 10
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A380 TECHNICAL TRAINING MANUAL
PRECONDITIONING OF THE A/C USING LOW PRESSURE GROUND CONNECTION
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 11
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Preconditioning Of The A/C Using High Pressure Ground
Connection
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WARNING: MAKE SURE THAT THE FWD AVIONICS ACCESS
DOOR 811 IS OPEN WITH A WARNING PLACARD
ATTACHED TO IT.
THE WARNING NOTICE MUST TELL PERSONS NOT
TO CLOSE THE DOOR. THIS PREVENTS
ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.
Air from the cabin is recirculated by the HP and the LP recirculation
fans.
With the X BLEED selector in the AUTO position, only AGU 1 is
supplied with bleed air. To use both AGUs, the X BLEED selector has
to be set in the OPEN position (all crossbleed valves are open).
The PACKs and the HOT AIR data are displayed in green on the ECAM
BLEED page, as soon as bleed air is supplied and the system is correctly
operating.
CAUTION: MAKE SURE THAT THE GROUND AIR SUPPLY IS
FREE FROM OIL CONTAMINATION. OIL
CONTAMINATION CAN CAUSE THE SMELL OF OIL
IN THE CABIN AND MAKE THE AIR-CONDITIONING
PACKS UNSERVICEABLE.
MAKE SURE THAT THE GROUND AIR-SUPPLY UNIT
IS NOT TOO NEAR THE AIRCRAFT AND THAT THE
ENGINE EXHAUST PIPE OF THE GROUND
AIR-SUPPLY UNIT POINTS AWAY FROM THE
AIRCRAFT. HEAT FROM THIS UNIT AND FROM THE
EXHAUST CAN CAUSE DAMAGE TO THE AIRCRAFT
STRUCTURE.
When on ground, the preconditioning of the A/C can be done by using
the HP connections. Air from the ground air supply unit is blown through
the HP ground connections into the bleed air manifold. The bleed air is
used:
- By the AGUs to produce fresh air.
- By the trim air manifolds to regulate the cabin temperature per zone.
The temperature can be selected using the CocKPiT and the CABIN
selectors.
- By the unpressurized compartments ventilation system turbofans to
draw ambient air to ventilate the AGUs.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 12
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A380 TECHNICAL TRAINING MANUAL
PRECONDITIONING OF THE A/C USING HIGH PRESSURE GROUND CONNECTION
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 13
A380 TECHNICAL TRAINING MANUAL
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Preconditioning Of The A/C Using APU Bleed Air Supply
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WARNING: MAKE SURE THAT THE FWD AVIONICS ACCESS
DOOR 811 IS OPEN WITH A WARNING PLACARD
ATTACHED TO IT.
THE WARNING NOTICE MUST TELL PERSONS NOT
TO CLOSE THE DOOR. THIS PREVENTS
ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.
When on ground, the preconditioning of the A/C can be done by using
the APU bleed air supply. Air from the APU is blown through the bleed
air manifold to the AGUs, the trim air manifolds and the turbofans.
Air from the cabin is recirculated by the HP and the LP recirculation
fans.
With the X BLEED selector in the AUTO position, the APU running and
the APU BLEED P/B ON, all the crossbleed valves are open. Both AGUs
are then supplied with bleed air.
Note that on the ECAM BLEED page, the white GND symbol and the
associated arrow are displayed as soon as the A/C is on the ground, even
if the HP ground air supply is not used.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 14
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A380 TECHNICAL TRAINING MANUAL
PRECONDITIONING OF THE A/C USING APU BLEED AIR SUPPLY
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIR CONDITIONING SYSTEM OPS/CTL & IND (2)
Jan 13, 2009
Page 15
A380 TECHNICAL TRAINING MANUAL
SUPPLEMENTAL COOLING SYSTEM DESCRIPTION (2)
In each cooling loop, the coolant is chilled by both CRUs in series.
Each cooling loop has two pumps for fluid distribution.
System Architecture/Description
The optional supplemental cooling system can be split into three stages:
- Central Refrigeration Units (CRUs).
- Coolant distribution.
- Cooling units.
CRU
Two CRUs chill the coolant, which circulates through the supplemental
cooling system. The two CRUs are installed in the belly fairing below
the center wing box.
The CRUs are vapor cycle machines made of a compressor, a
condenser and an evaporator. The CRUs condensers are cooled by
ram air in flight, and by condenser fans on the ground. The fans are
energized via the 135XP and the 240XP busses.
A ground inlet flap is opened on ground to increase the airflow.
Each CRU evaporator chills the coolant, which circulates through the
supplemental cooling system.
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Coolant Distribution
The liquid used as coolant in the supplemental cooling system is
Galden (Trade mark).
This coolant is:
- non-toxic,
- non-flammable,
- heat resistant,
- non-corrosive.
Two separated cooling loops supply the various consumer stations
with coolant.
One cooling loop supplies the RH side of the aircraft, and the other
one the LH side of the aircraft. Both cooling loops supply the central
galleys.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
Cooling Units
Air Cooling Units (ACUs) are installed in the galleys. The number
of ACUs depends on the number of trolley compartments to be cooled.
The ACUs are located behind the lateral galleys and above the central
galleys.
Through the ACUs the air is cooled and then goes either through or
over the trolleys.
The Ground Cooling Units (GCUs) transfer the cooling capacity from
the coolant to avionics ventilation air.
System Control and Indicating
The Supplemental Cooling System (SCS) is controlled and monitored
by:
- The SCS application hosted in the 4 CPIOM-As.
- Two Supplemental Cooling System Controllers (SCSCs).
The supplemental cooling system operates according to a manual
selection made on the VENT panel located on the overhead panel.
Some parameters of the system are displayed on the galley cooling
FAP pages.
SUPPLEMENTAL COOLING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 16
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A380 TECHNICAL TRAINING MANUAL
SYSTEM ARCHITECTURE/DESCRIPTION - CRU ... SYSTEM CONTROL AND INDICATING
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 17
A380 TECHNICAL TRAINING MANUAL
SUPPLEMENTAL COOLING SYSTEM DESCRIPTION (2)
The Air Cooling Units (ACUs) and the optional Ground Cooling Units
(GCUs) have water drain pipes connected to the water & waste system,
to avoid icing of the ACUs/GCUs.
System Architecture/Description (continued)
Transportation Of Cold
The transportation of cold is operated on two separated loops.
Each loop has:
- A twin pumps assembly, for the coolant fluid circulation,
- Two manual Shut-Off Valves (SOVs),
- One reservoir of GALDEN (HT135) on each circuit,
- A Supplemental Cooling System Controller,
- A ground service panel.
On the 2 separated loops, the maximum pipe pressure is of 15 bars.
In case of one pump failure in a pump assembly, the second pump
supplies 70% of the normal fluid flow on the related loop.
Each Supplemental Cooling System Controller controls and powers
one pump of each loop pump assembly.
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Servicing
The ground service panel and the SOVs are only used for ground
maintenance operations. The ground service panel access is possible
by opening an access door, whereas the SOVs are only accessible by
removing belly fairing panels.
Ground Support Equipments are used to perform:
- Coolant loop refilling/drainage.
- Partial coolant loop refilling/drainage (for CRU removal/installation).
- Accumulator refilling/venting/drainage.
Consumption Of Cold
The consumption of cold operates on:
- The trolleys, from the Air Cooling Units,
- The avionics bays, from the optional Ground Cooling Units.
The trolleys are cooled with the air through or air over principle.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 18
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A380 TECHNICAL TRAINING MANUAL
SYSTEM ARCHITECTURE/DESCRIPTION - TRANSPORTATION OF COLD ... CONSUMPTION OF COLD
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING SYSTEM DESCRIPTION (2)
Jan 13, 2009
Page 19
A380 TECHNICAL TRAINING MANUAL
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
General
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On the VENT panel, the COOLinG PBSW is used to control the
Supplemental Cooling System status. During normal operation, the
COOLG PBSW is pressed in (AUTO). When the COOLG PBSW is
released, the system is stopped, and the OFF indication illuminates. The
amber FAULT indication comes on when the system is inoperative.
On the ELEC panel, the GALLEY PBSW is used to manually shed all
the galley loads, or to restore the galleys after an overload or an automatic
shedding procedure. When all the galleys are shed, the GALLEY PBSW
OFF light comes on. The Air Cooling Units (ACUs) are powered through
the galleys. If the galleys are shed, the ACUs are not supplied.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 20
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A380 TECHNICAL TRAINING MANUAL
GENERAL
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 21
A380 TECHNICAL TRAINING MANUAL
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Cold Generation
With the COOLinG P/B in the AUTO position and the system energized:
- the Central Refrigeration Units (CRUs) supply the necessary cooling
capacity to both coolant loops. The Supplemental Cooling System
Controller (SCSC) adjusts the cooling capacity via the compressor,
- the condenser fans operate only on the ground, to supply the necessary
airflow to the condenser,
- ambient air is drawn from the Ram Air Channel and hot air is rejected
overboard,
- the 4 centrifugal pumps send the coolant through the piping,
- the accumulators adjust the coolant quantity in the loops, if thermal
expansion or small leak occur,
- the Manual Shut-Off Valves (MSOVs) are open.
The procedure is:
- Set the main switch to ON, on the applicable GSE tool,
- Set the control switch to ON, on the operator panel,
- Push the reset switch (Fill/Drain tool only),
- Follow the instructions on the display.
Note that the closure of the related MSOVs will be required.
Condensers & Filters Service
The filter cartridge of the filter assembly is a consumable item, and
therefore has to be replaced when clogged. An integrated pressure sensor
monitors the filter clogging.
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Coolant Liquid Servicing
By closing the different MSOVs and using GSEs, parts of the SCS can
be drained/filled/pressurized, for each loop separately:
- the accumulators,
- the centralized equipments,
- the Air Cooling Units (ACUs),
- the SCS Controllers (SCSCs).
The galden level is monitored in both cooling loops. A CMS fault message
(LOW-COOLANT-LEVEL, SCS#) is issued when the level sensor
indicates that the coolant is below 25% of full level. If it is the case, get
access to the ACMS RTM-Parameter Monitoring on the OMT. Select
the Dataset ATA21-SCOOLS. Examine the fill level of the related
accumulator.
If the fill level is below 25%, do a refill of the Supplemental Cooling
System with the available tool:
- With the Refill Tool (AMM 21-59-00-613-801), or
- With the Fill/Drain Tool (AMM 21-59-00-613-807).
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 22
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A380 TECHNICAL TRAINING MANUAL
COLD GENERATION ... CONDENSERS & FILTERS SERVICE
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 23
A380 TECHNICAL TRAINING MANUAL
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Users
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The cabin crew can control each ACU independently via the galley panel.
On this panel, lights indicate if:
- The ACU is ON,
- The temperature value in the ACU is too high,
- The ACU is faulty.
There is also a circuit breaker and an optional temperature selector.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 24
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A380 TECHNICAL TRAINING MANUAL
USERS
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 25
A380 TECHNICAL TRAINING MANUAL
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
LAY08521 - L1E03T0 - LM21OTLEVEL0201
FAP Indications
All the ACUs data (location, temperature, status) are displayed on the
Galley Cooling FAP page.
The Deck Selection allows to view:
- The galleys with galley cooling on all decks, or
- The specific galley cooling status for one single deck.
There are three keys (plus one optional) to select the deck:
- All,
- Upper Deck,
- Main Deck,
- Lower Deck (optional).
The ALL page gives information about all galleys with galley cooling.
If an Air Cooling Unit (ACU) is not operative, it generates an error
message and the concerned galley is colored in amber.
The Upper Deck, Main Deck and Lower Deck pages show the location
of the Air Cooling Units and detailed information about the system status,
the temperatures and error messages.
The system status box gives information about the status of the
Supplement Cooling System.
- Active: one or more ACUs are ON and working.
- Not active: either the system is ready to operate but all ACUs are
switched off, or the system is currently not available for galley cooling
The location box describes the location of all Air Cooling Units (ACUs)
on the selected deck. The active entry is highlighted by a colored
background. Select the ACU to be checked for status and temperature
by touching the up or down button.
A green frame indicates the related cooling unit on the aircraft symbol.
The status box gives information about the current status of the selected
ACU.
The selected box shows the target output temperature of the selected
ACU, which has been set on the galley panel in the related galley.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
The unit/actual box displays the current temperature of the trolley
compartment, which is supplied with cooled air by the selected ACU.
Optionally, if there are additional sensors installed in the trolleys, the
unit/actual box lists all trolleys and compartments, which are supplied
with cooled air by the selected ACU. Next to the listed trolleys and
compartments the current temperature is displayed.
The purpose of the pre-conditioning mode is to cool the coolant down
prior to the operation the ACUs.
The message box appears in case of a failure, only. Additionally, the
CAUTion button in the upper left corner of the FAP comes on in amber.
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 26
LAY08521 - L1E03T0 - LM21OTLEVEL0201
A380 TECHNICAL TRAINING MANUAL
FAP INDICATIONS
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
SUPPLEMENTAL COOLING OPS/CTL & IND (2)
Jan 13, 2009
Page 27
A380 TECHNICAL TRAINING MANUAL
AIRCRAFT SYSTEM PROTECTION DESCRIPTION (2)
Avionics Equipment Ventilation
The avionics equipment ventilation system has two main sub-systems:
- The blowing sub-system,
- The extraction sub-system.
The blowing sub-system flows proper air through or around the avionics
equipment.
The extraction sub-system extracts air through or around the avionics
equipment in order to evacuate the heat dissipation.
LAY08521 - L1E03T0 - LM21DTLEVEL0201
Blowing Sub-System
The blowing sub-system is composed of two independent circuits
installed on the LH and RH sides in the FWD part of the aircraft.
Each circuit has a filter and a blower fan. The circuit supplies the
appropriate ventilation airflow to:
- The avionics racks from the same side,
- The cockpit panels and equipments.
The Emergency Electrical Power Distribution Center (EEPDC) and
the avionics racks located in the upper avionics bay are supplied by
both systems.
The blower fans operate as soon as the aircraft is energized.
A back-up valve, connected to the mixer unit and dedicated to each
circuit, supplies the necessary airflow in case of relevant blower fan
failure.
Extraction Sub-System
The extraction sub-system is composed of:
- An extract fan,
- An overboard valve,
- An inboard valve.
The extraction sub-system extracts the air from all equipments
including the primary power center.
The extract fan operates as soon as the A/C is energized.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
During flight, the extracted air is blown under the floor area of the
FWD cargo compartment through the inboard valve and then
discharged overboard through the FWD Outflow Valves (OFVs).
On ground, the extracted air is directly discharged overboard through
the overboard valve.
In case of extract fan failure, the air can be extracted by cabin
differential pressure through the overboard valve.
Controls and Indicating
The blowing and extraction sub-systems are controlled and monitored
by the Avionics Ventilation System (AVS) application hosted in the
Core Processing Input/Output Module (CPIOM)-B3 and B4.
If a failure is detected, the extraction sub-system can be overridden
from the VENT panel, located on the overhead panel. The extract P/B
in OVerRiDe position will partially open the overboard valve and
close the inboard valve.
Some parameters of the systems are displayed on the ECAM COND
and CAB PRESS pages.
In case of system abnormal operation, a visual warning is shown on
the ground service panel.
In addition an aural warning is triggered through the ground horn.
Avionics Equipment Ground Cooling (Optional)
The avionics equipment ground cooling system supplies additional
automatic cooling on ground, during external hot conditions.
The system is composed of two Ground Cooling Units (GCUs).
The air from the blowing sub-system exchanges heat with a coolant
in each GCU.
The coolant is supplied by the Supplemental Cooling System (SCS).
The GCUs are controlled and monitored through the SCS application
hosted in the 4 CPIOM-As.
The avionics equipment ground cooling system is activated from the
maintenance panel located on the overhead panel.
AIRCRAFT SYSTEM PROTECTION DESCRIPTION (2)
Jan 13, 2009
Page 28
LAY08521 - L1E03T0 - LM21DTLEVEL0201
A380 TECHNICAL TRAINING MANUAL
AVIONICS EQUIPMENT VENTILATION - BLOWING SUB-SYSTEM ... AVIONICS EQUIPMENT GROUND COOLING (OPTIONAL)
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION DESCRIPTION (2)
Jan 13, 2009
Page 29
A380 TECHNICAL TRAINING MANUAL
AIRCRAFT SYSTEM PROTECTION DESCRIPTION (2)
LAY08521 - L1E03T0 - LM21DTLEVEL0201
Unpressurized Compartments Ventilation
The AGUs installed in the wing roots and the bleed hot air ducts installed
in the belly fairing dissipate a large amount of heat during operation. The
unpressurized compartments ventilation system uses external air to remove
and dump this heat overboard.
The system also removes and dumps outside fuel vapors accumulating
below the wing center box and the trim tank.
The ventilation principle is based on the use of external air from air inlets
in the belly fairing. Air is distributed by means of piccolo tubes and
finally dumped overboard through air outlets. In the belly fairing and
lower-wing area, the air distribution is done by 2 sub-systems: one on
the left hand side and one on the right hand side.
Each side has:
- A turbofan,
- A turbofan supply valve,
- Two check valves.
The ventilation of the belly fairing and lower-wing area is done by ram
air in flight or by the turbofans on ground.
The turbofans are pneumatically powered by compressed hot bleed air.
This air is tapped from the cross-bleed system and supplied through the
turbofan supply valve.
Bleed air, from any available bleed supply, flows through two supply
valves and drives both fans. Ventilation air is discharged overboard,
through 7 air outlets:
- Three in the belly fairing,
- Four in the wing root.
In case of ventilation failure of an AGU compartment on ground, the
corresponding AGU is automatically stopped.
The rear fuselage compartment system has a fan. The fan is electrically
supplied in 115 VAC on ground, when the temperature is above 9ºC
(48,20ºF). In flight, sufficient airflow ventilates the compartment.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
The unpressurized compartments ventilation system is controlled and
monitored by:
- The AGS and the VCS applications hosted in the 4 CPIOM Bs,
- Two FDACs,
- The Ventilation Control Module (VCM) aft.
NOTE: The 4 CPIOM Bs incorporate the overall control of the system
as well as the interface to the Air Data Communication Network
(ADCN).
AIRCRAFT SYSTEM PROTECTION DESCRIPTION (2)
Jan 13, 2009
Page 30
LAY08521 - L1E03T0 - LM21DTLEVEL0201
A380 TECHNICAL TRAINING MANUAL
UNPRESSURIZED COMPARTMENTS VENTILATION
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION DESCRIPTION (2)
Jan 13, 2009
Page 31
A380 TECHNICAL TRAINING MANUAL
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
General
LAY08521 - L1E03T0 - LM21OSLEVEL0201
The AIR panel is used to control the sub-systems related with:
- Bleed air system.
- Air Generation System.
- Temperature Control System.
The VENT panel is used to:
- Override the avionics ventilation system automatic mode.
- Shut down the air recirculation system.
- Shut down the optional Supplemental Cooling System.
The CABin PRESSure panel is used to:
- Manually control the cabin pressure.
- Put the A/C in DITCHING configuration.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Jan 13, 2009
Page 32
LAY08521 - L1E03T0 - LM21OSLEVEL0201
A380 TECHNICAL TRAINING MANUAL
GENERAL
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Jan 13, 2009
Page 33
A380 TECHNICAL TRAINING MANUAL
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Check Of Blowing Filter Status
LAY08521 - L1E03T0 - LM21OSLEVEL0201
The Avionics Ventilation System filters clogging status can be displayed
via the system/report test menu of the Onboard Maintenance System.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Jan 13, 2009
Page 34
LAY08521 - L1E03T0 - LM21OSLEVEL0201
A380 TECHNICAL TRAINING MANUAL
CHECK OF BLOWING FILTER STATUS
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Jan 13, 2009
Page 35
A380 TECHNICAL TRAINING MANUAL
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Filter Replacement
LAY08521 - L1E03T0 - LM21OSLEVEL0201
When the threshold value has been reached, the clogged filter has to be
replaced. To perform this replacement, all bleed and ground air sources
must be shut down.
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Jan 13, 2009
Page 36
LAY08521 - L1E03T0 - LM21OSLEVEL0201
A380 TECHNICAL TRAINING MANUAL
FILTER REPLACEMENT
RAMP & TRANSIT COURSE - M03 (RR Trent 900)
LEVEL II&III - ATA 21 Air Conditioning System
AIRCRAFT SYSTEM PROTECTION OPS/CTL & IND (2)
Jan 13, 2009
Page 37
AIRBUS S.A.S.
31707 BLAGNAC cedex, FRANCE
STM
REFERENCE LAY08521
JANUARY 2009
PRINTED IN FRANCE
AIRBUS S.A.S. 2009
ALL RIGHTS RESERVED
AN EADS COMPANY