a380-Level III - Ata 38 Water_waste

A380 TECHNICAL TRAINING MANUAL MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste

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A380 TECHNICAL TRAINING MANUAL

LEVEL III - ATA 38 WATER/WASTE

L0Y06082 - L0DT0T0

Potable Water System Description (3) . . . . . . . . . . . . . . . . . . . . . . . . . 2 Toilet System Description (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Waste Water Drain System Description (3) . . . . . . . . . . . . . . . . . . . . 28 Water/Waste System Maintenance (3) . . . . . . . . . . . . . . . . . . . . . . . . 30 Water/Waste System Component Location (3) . . . . . . . . . . . . . . . . . 34

MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste

TABLE OF CONTENTS

Mar 21, 2006 Page 1


POTABLE WATER SYSTEM DESCRIPTION (3) General Architecture

L0Y06082 - L0DT0T0 - LM38D1POTABLE01

The potable water tanks are installed in the FWD area of the AFT cargo compartment, above the body landing gear boxes (three on the LH side and three on the RH side). As option, two additional tanks can be installed (one on each side). Each tank has a capacity of 283 liters (75 US gallons) for a basic total volume of 1700 liters (449 US gallons). The potable water is distributed to the galley and lavatory faucets and to the toilets and Galley Waste Disposal Units (GWDUs) for flushing. Two compressors fulfill the tanks pressurization. For maintenance, it is possible to pressurize the tanks by using a ground pressure connection. Before distribution, a treatment module filters, heats and purifies the potable water. The filling of the water tanks is done from the potable water service panel installed in the AFT lower fuselage. The draining of the complete system is done from the potable water service panel and from the FWD drain panel installed in the FWD lower fuselage. A depress valve, installed near the service panel, is used for system depressurization on ground.


POTABLE WATER SYSTEM DESCRIPTION (3)

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GENERAL ARCHITECTURE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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POTABLE WATER SYSTEM DESCRIPTION (3) Potable Water Storage


The potable water tanks numbering is organized as follows: - tanks number 1, 3, 5 (and 7 as option) on the LH side, - tanks number 2, 4, 6 (and 8 as option) on the RH side. Each tank has a recirculation port, an overflow port and a fill/drain port. The middle tanks number 3 and 4 have an ultrasonic level sensor installed in the bottom. Note that the level sensors transmit the water level data to the Potable Water Indication Panel (PWIP) for calculation. The average value of the water quantity in the tanks is shown on the FAPs and on the PWIP.



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POTABLE WATER STORAGE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


Mar 17, 2006 Page 5


POTABLE WATER SYSTEM DESCRIPTION (3) Air Supply System


The air supply system supplies pressurized air to the potable water system by means of two compressors installed on the LH side near the potable water tanks. The normal operating pressure of the system is between 35 psi and 41 psi. An electric motor operates each compressor. An air compressor motor controller, installed near the compressors, controls each motor. The air is picked-up in the cargo compartment through an inlet filter mounted on each compressor, and sent under pressure to an air manifold assembly installed above the compressors. The air manifold assembly has: - two pressure switches (one low pressure and one high pressure) for a feedback to the controllers, - an over pressure relief valve, which opens when the pressure reaches 130 psi, - a ground pressure connection, - filters, to make sure that unwanted material do not go into the potable water system, - air check valves, to prevent a backflow of air.



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AIR SUPPLY SYSTEM MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


Mar 17, 2006 Page 7


POTABLE WATER SYSTEM DESCRIPTION (3) Potable Water Treatment Module


The potable water treatment module, installed on the RH side near the potable water tanks, has: - a circulation pump, installed just near the treatment module on the inlet pipe. The pump, driven by an electric motor, helps the water circulation inside the module, - an inhibition of scaling module, which has a magnetic tube removing scale deposits and particles. There is no maintenance servicing on it, - a water heater, which warms-up the water entering in the loop. The heating and disinfection control unit manages all the electrical components of the potable water treatment module. It switches ON/OFF the circulation pump as well as the water heater, in order to keep a temperature range of 6-15ºC.



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POTABLE WATER TREATMENT MODULE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


Mar 17, 2006 Page 9


POTABLE WATER SYSTEM DESCRIPTION (3) Lavatory Water Supply Assembly


The lavatory water supply assembly has: - a manual shut-off valve, installed below the sink. It isolates the water going to the faucet and also to the toilet unit for flushing, - a water heater, which warms-up the water up to 50ºC, - a mixing unit, which mixes the hot and cold water to satisfy the water supply temperature demand. The lavatory water supply assembly control device receives the temperature demand from the infrared controlled faucet and manages the mixing process accordingly.



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LAVATORY WATER SUPPLY ASSEMBLY MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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POTABLE WATER SYSTEM DESCRIPTION (3) Control System Architecture


The PWIP, the heating and disinfection control unit, the air compressor motor controllers and the lavatory water supply assembly control devices monitor and control the performance of their related system components. Note that the PWIP manages the potable water quantity (level sensors signal), the pre-selection and the valves operations (fill/drain, FWD drain and depress valves). The PWIP and the FAPs are the main controllers and indicators of the potable water system. The Cabin Intercommunication Data System (CIDS) directors, through the vacuum system control function, manage the data exchange between the potable water system components and some A/C systems like: - the FAPs, - the Onboard Maintenance System (OMS) for failure report and tests, - the Landing Gear Extraction Retraction System (LGERS).



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CONTROL SYSTEM ARCHITECTURE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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POTABLE WATER SYSTEM DESCRIPTION (3) Water/Waste FAP Page


The Water/Waste FAP page has the following functions: - indication of potable water quantity in the tanks, - indication of A/C configuration (location of lavatories and galleys), - indication of system status, - indication of failure messages, - system depressurization on ground ("Water Depr." button), - system depressurization in flight ("Shut Down" button), - isolation of water distribution areas ("Shut Off LH" and "Shut Off RH" buttons), - water pre-selection ("Pre-Select" button).



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WATER/WASTE FAP PAGE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


Mar 17, 2006 Page 15


TOILET SYSTEM DESCRIPTION (3)

L0Y06082 - L0DT0T0 - LM38D2TOILET001

General Architecture The toilet system is divided into four independent subsystems, which are: - the LH main deck, - the RH main deck, - the LH upper deck and, - the RH upper deck. Each subsystem has: - toilet assemblies, - Galley Waste Disposal Units (GWDUs), - a waste tank, - a waste separator with filter, - a high level sensor, - two absolute pressure sensors, - an overboard check valve, - a vacuum generator, - a waste drain valve connected to an individual control handle on the waste service panel. The waste tanks are installed in the under floor area behind the bulk cargo compartment. The tanks for the main deck toilets and GWDUs have a capacity of 675 liters each (178 US gallons). The tanks for the upper deck toilets and GWDUs have a capacity of 373 liters each (98 US gallons). The toilet system uses potable water to flush the toilets and the GWDUs. The waste materials are transported into the waste tanks through flush valves by cabin differential pressure. When this differential pressure is insufficient, at altitudes below 16000 ft., the vacuum generators generate the necessary vacuum in the waste tanks to fulfill the waste flow. During servicing, the waste tanks are drained then rinsed from the waste service panel installed in the AFT lower fuselage.



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TOILET SYSTEM DESCRIPTION (3) Toilet Assembly and GWDU


The toilet assembly and the GWDU have: - a flush switch, which initiates the actuation of a flush sequence, - a rinse valve, which opens to spray potable water into the bowl for rinsing, - a flush valve, which opens to evacuate the waste materials to the waste tanks, - a Multi Purpose Interface (MPI) installed on the toilet or the GWDU frame, which controls and sequences the rinse and flush functions. Using the data from the weight sensing device, the toilet assembly MPI can discriminate between a "seated" and a "standing" user and vary the rinse water quantity accordingly. The MPI starts a short flush cycle for a "standing" user and a long flush cycle for a "seated" user. The GWDU has two flushing modes: - mode 1: wet flush, used for waste materials discard. The GWDU MPI carries out a flush sequence with rinsing by using potable water. - mode 2: dry flush, used for liquids discard only. The GWDU MPI carries out a flush sequence without rinsing, in order to reduce the consumption of potable water when not required. Pressing twice in a second the flush switch activates this special mode.



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TOILET ASSEMBLY AND GWDU MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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Waste Tank Assembly and Associated Equipment The waste tank assembly has: - a waste tank, - a waste inlet with a flow diverter, which directs the waste materials to the bottom of the tank, - a waste separator with a filter, which separates the waste materials from the air to make sure that only clean air will flow overboard, - an ambient absolute pressure sensor installed on the air outlet of the waste separator, which measures the air pressure above the waste surface in the waste tank, - a hydrostatic absolute pressure sensor installed at the bottom of the waste tank, which measures the hydrostatic pressure. It calculates the waste level in the tank with the received ambient and hydrostatic data, - a high level sensor installed in the upper section of the waste tank, which provides the "full tank" signal in order to stop the related subsystem, - three rinse nozzles installed on the top of the tank to rinse the tank and introduce disinfection fluids. A differential pressure is necessary to move the waste materials from the toilets assemblies and the GWDUs to the waste tank. To obtain the necessary vacuum in the tank when the altitude is below 16000 ft., a vacuum generator operates, creating a differential pressure between 4 psi (0,28 bar) and 9 psi (0,62 bar) below the cabin pressure. A Motor Controller Interface (MCI) installed adjacent to the vacuum generator controls the operation of the vacuum generator. When a flush sequence is initiated at a toilet assembly or a GWDU, the MCI receives a signal from the related MPI. Before the MCI supplies electrical power to the related vacuum generator, it controls the flight phase data (ground signal, altitude) received from the Landing Gear Extraction Retraction System (LGERS) and the Air Data/Inertial Reference Units (ADIRUs) through the Cabin Intercommunication Data System (CIDS). MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste

Note that the MCI also receives a discrete landing gear status signal in case of CIDS lost. The MCI is connected to the service panel limit switch. Thus, when the waste service panel door is opened and the A/C is on ground, the operation of the toilet system is inhibited. Finally, the MCI is connected to the related high level sensor. Thus, when a "full tank" signal is detected, the related subsystem is inhibited in order to prevent an overflow of the waste materials storage.


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WASTE TANK ASSEMBLY AND ASSOCIATED EQUIPMENT MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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Flush Sequence The activation of the flush switch on a toilet assembly or on a GWDU initiates the actuation of a flush sequence. The related MPI starts a timed sequence that includes the analysis of the flush requirements (control of the flight phase data, "standing" or "seated user", dry or wet flush...) before the flush cycle starts. For a toilet assembly: - 2.1 seconds after the beginning of the flush cycle, the rinse valve opens during 0.9 second for a long flush ("seated" user), and during 0.3 second for a short flush ("standing" user). - 2.5 seconds after the beginning of the flush cycle, the flush valve opens during 4 seconds. The duration of the complete flush cycle is 9 seconds. For a GWDU: - 8 seconds maximum (according to the required vacuum pressure) after the beginning of the flush cycle, the rinse valve opens during 0.95 second for a normal wet flush. For a dry flush the rinse valve is not activated. - 1 second after the actuation of the rinse valve, the flush valve opens during 4 seconds. - 9 seconds after the actuation of the flush valve, the flush cycle is complete.



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FLUSH SEQUENCE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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TOILET SYSTEM DESCRIPTION (3) Control System Architecture


The following components have a microprocessor and are interconnected via CAN bus: - toilet assembly MPIs, - GWDU MPIs - vacuum generator MCIs, - hydrostatic and ambient absolute pressure sensors, - high level sensors. The CIDS directors, through the vacuum system control function, manage the data exchange between the toilet system components and some A/C systems like the FAPs, the Onboard Maintenance System (OMS), the LGERS and the ADIRUs. The FAPs are the main controllers and indicators of the toilet system. The interface with the OMS is used for failure report and test of the toilet system. The LGERS and ADIRUs give flight phase data (ground signal and altitude) for the control of the vacuum system.



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CONTROL SYSTEM ARCHITECTURE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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TOILET SYSTEM DESCRIPTION (3) Water/Waste FAP Page


The Water/Waste FAP page has the following functions: - indication of waste quantity in the tanks, - indication of A/C configuration (location of lavatories and galleys), - indication of system status, - indication of failure messages, - auto flush ("Auto Flush" button), - rinse valve warning reset ("Reset Warn." button).



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WATER/WASTE FAP PAGE MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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WASTE WATER DRAIN SYSTEM DESCRIPTION (3) General Architecture

L0Y06082 - L0DT0T0 - LM38D3WASTE0001

The waste water drain-system discards overboard the waste water from the galley sinks and the lavatory washbasins. The waste water flows through the drain valves to the FWD and the AFT heated drain masts installed on the lower fuselage. The waste water is achieved by gravity on ground and by differential pressure in flight. The diaphragm type drain valves are usually closed. They open only if a sufficient amount of waste water is collected. This prevents a continuous leakage of the cabin air through the drain lines. To prevent icing, the drain masts are electrically heated.


WASTE WATER DRAIN SYSTEM DESCRIPTION (3)

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L0Y06082 - L0DT0T0 - LM38D3WASTE0001



WASTE WATER DRAIN SYSTEM DESCRIPTION (3)

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WATER/WASTE SYSTEM MAINTENANCE (3) Potable Water System Tests Potable Water System (PWS) tests are done to check several functions of the system.

OMS Interactive Tests Overview The PWS has the following interactive tests: - system test, - valve test. These tests are launched from the OMS HMI (using the OMT, OIT or PMAT).

System Test

L0Y06082 - L0DT0T0 - LM38Y1MAINT0001

The system test does a check of all monitored components of the PWS: - the Potable Water Indication Panel (PWIP), - the level sensors, - the air compressor motor controllers, - the heating and disinfection control unit, - the fill/drain valve, - the FWD drain valve, - the depress valve, - the optional valves.

Valve Test The valve test does a check of all installed valves of the PWS: - the fill/drain valve, - the FWD drain valve, - the depress valve, - the optional valves.


WATER/WASTE SYSTEM MAINTENANCE (3)

Mar 17, 2006 Page 30

L0Y06082 - L0DT0T0 - LM38Y1MAINT0001


POTABLE WATER SYSTEM TESTS - OMS INTERACTIVE TESTS OVERVIEW ... VALVE TEST MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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WATER/WASTE SYSTEM MAINTENANCE (3) Vacuum Toilet System Tests Vacuum Toilet System (VTS) tests are done to check several functions of the system.

OMS Interactive Tests Overview The VTS has the following interactive tests: - system test, - subsystem test MD/LH, - subsystem test MD/RH, - subsystem test UD/LH, - subsystem test UD/RH. These tests are launched from the OMS HMI (using the OMT, OIT or PMAT).

L0Y06082 - L0DT0T0 - LM38Y1MAINT0001

System Test The system test does a check of all monitored components of the VTS: - the vacuum generator Motor Controller Interfaces (MCIs) of all four subsystems, - the liquid level sensors of all four subsystems, - the absolute pressure sensors of all four subsystems, - the Multi Purpose Interfaces (MPIs) of all toilet assemblies and Galley Waste Disposal Units (GWDUs) (refer to cabin layout).

Subsystem Test The test of each vacuum toilet subsystem does a check of its related monitored components: - the vacuum generator MCI, - the liquid level sensor, - the two absolute pressure sensors, - the MPIs of the related toilet assemblies and GWDUs.



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L0Y06082 - L0DT0T0 - LM38Y1MAINT0001


VACUUM TOILET SYSTEM TESTS - OMS INTERACTIVE TESTS OVERVIEW ... SUBSYSTEM TEST MAINTENANCE COURSE - T1 & T2 (RR / Metric) LEVEL III - ATA 38 Water/Waste


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WATER/WASTE SYSTEM COMPONENT LOCATION (3) FWD Fuselage Rear Cargo Compartment Potable Water Waste Equipments

L0Y06082 - L0DT0T0 - LM38C1LEVEL0301

Cabin


WATER/WASTE SYSTEM COMPONENT LOCATION (3)

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L0Y06082 - L0DT0T0 - LM38C1LEVEL0301

This Page Intentionally Left Blank


WATER/WASTE SYSTEM COMPONENT LOCATION (3)

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AIRBUS S.A.S. 31707 BLAGNAC cedex, FRANCE STM REFERENCE L0Y06082 MARCH 2006 PRINTED IN FRANCE AIRBUS S.A.S. 2006 ALL RIGHTS RESERVED AN EADS JOINT COMPANY WITH BAE SYSTEMS

a380-Level III - Ata 38 Water_waste

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