a320_chapter_38_water_and_waste.pdf

A319/A320/A321TECHNICAL TRAINING MANUAL

MECHANICS / ELECTRICS & AVIONICS COURSE

38 WATER & WASTE

This document must be used for training purpose only

Under no circumstances should this document be used as a reference.

It will not be updated.

All rights reserved.No part of this manual may be reproduced in any form,

by photostat, microfilm, retrieval system, or any other means,without the prior written permission of Airbus Industrie.

GENERAL** System Presentation (1) 1.......................

POTABLE WATER SYSTEM (A320)** Description/Operation (2) 5.....................** Controls and Indicating (1) 9...................** Components (3) 17................................

POTABLE WATER SYSTEM (A319)** Description/Operation (2) 33....................** Controls and Indicating (1) 39..................** Components (3) 47................................

POTABLE WATER SYSTEM (A321)** Description/Operation (2) 63....................** Controls and Indicating (1) 69..................** Components (3) 77................................

WASTE WATER SYSTEM** Description/Operation (3) 97....................** Components (3) 101...............................

TOILET SYSTEM** Principle (2) 107................................** Description (2) 111..............................** Controls and Indicating (1) 117.................** Monitoring (3) 123...............................** Components (3) 127...............................** Assembly Components (3) 141.....................

MAINTENANCE PRACTICES** Potable Water SYS Servicing (2) (A320) 149.....** Potable Water SYS Servicing (2)(A319/321) 153..** Toilet System Servicing (2) 157.................

_A319/A320/A321 TECHNICAL TRAINING MANUAL38 WATER & WASTEMECHANICS / ELECTRICS & AVIONICS COURSE

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38 - WATER AND WASTE

38-00-00 WATER AND WASTE SYSTEMPRESENTATION

CONTENTS:Potable Water SystemWaste Water SystemToilet System

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WATER AND WASTE SYSTEM PRESENTATION

The water and waste system consists of a pneumaticallypressurized potable water system, a waste disposalsystem and a vacuum toilet system.

POTABLE WATER SYSTEM

The potable water system supplies the galleys andlavatories with water from a tank via a distributionsystem.It is pressurized by bleed air system. A groundconnector for external supply is also available.

WASTE WATER SYSTEM

The waste water system includes drainage of waste waterfrom lavatory wash basins and galley sinks, to bedischarged overboard via heated drain masts.

TOILET SYSTEM

The toilet system collects waste in an underfloor wasteholding tank. The tank is emptied and cleaned duringaircraft ground service.The toilet system uses water from the potable watersystem for the toilet flush. Waste is removed from thetoilet bowl due to differential pressure between thewaste tank and cabin.An electronic Vacuum System Controller (VSC) controlsand monitors the vacuum system.

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WATER AND WASTE SYSTEM PRESENTATION



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38 - WATER & WASTE SYSTEM

38-10-00 POTABLE WATER SYSTEM DESCRIPTION

CONTENTS:StoragePressurizationDistributionUser SupplyHeatingFillingDrainingSelf Examination

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POTABLE WATER SYSTEM DESCRITION

STORAGE

The potable water is stored in one tank installed inthe pressurized underfloor area of the right handfuselage, aft of the forward cargo compartment.Potable water tank capacity : 200 l (53 US gal).

PRESSURIZATION

Pressurization of the system enables water supply fromthe tank to the necessary service location.Compressed air is tapped from the cross feed line ofthe engine bleed air.On ground, when the bleed air system is not available,the ground air pressure supply system is used.If installed, an optional compressor ensurespressurization in case of bleed air decrease.

DISTRIBUTION

Potable water from the water tank is supplied througha system of distribution lines.The lavatory and galley distribution lines run belowthe passenger compartment floor.They are shrouded and insulated, and some of them areheated.

USER SUPPLY

Each lavatory can be isolated from the potable waterdistribution system through a manual shut-off valve.

HEATING

A water heater is installed under the wash basin insidethe sanitary unit cabinet.A thermostat allows the water temperature to bemaintained between 45 °C (113 °F) and 48 °C (118,4 °F).An over temperature safety device protects the heatingelement.

FILLING

Filling is achieved through a fill/drain valve operatedby the fill/drain control handle on the potable waterservice panel.The fill/drain control handle simultaneously opens theelectrically motorized overflow valve for venting.The quantity tramsmitter sends a tank-full signal toclose the fill/drain valve automatically.Manual operation is possible via control handlesdedicated to each valve.Maximum permissible pressure to fill the potable watertank is 50 psi (3.4 bars).

DRAINING

The draining operation is achieved through thefill/drain valve and two motorized drain valves usingthe same control handle as the filling operation.In this case, the overflow valve is also controlledto open.Manual operation is possible via control handlesdedicated to each valve.

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POTABLE WATER SYSTEM DESCRIPTIONTMUWATB0B-P01 LEVEL 1



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SELF EXAMINATION

Why is the potable water tank pressurized ?A-To ease draining operation.B - To warm up the waterC - To enable water supply from the tank to

the service users.

How many valves are used during draining operation ?A-Two.B-Three.C-Four.

What is used for tank filling operation ?A-One handle, one filling valve.B-One handle, two valves.C-Two handles, two valves.

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38-10-00 POTABLE WATER SYSTEM CONTROLSAND INDICATING

CONTENTS:GeneralPotable Water Service PanelForward Water Drain PanelsForward Attendant PanelSelf Examination

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POTABLE WATER SYSTEM CONTROLS AND INDICATING

GENERAL

The potable water controls and indicating includes thedisplay on the Forward Attendant Panel (FAP) and threepanels located at the bottom of the aircraft fuselage.

POTABLE WATER SERVICE PANEL

The potable water service panel is installed in therear left side of the fuselage.

DOOR MICROSWITCHThe door microswitch isolates the indicating systemwhen the potable water service panel is closed.When the door is open, the electric motor of thecompressor is stopped.

QUANTITY INDICATORThe quantity indicator gives the level of the waterin the potable water tank.

FILL/DRAIN CONTROL HANDLEThe fill/drain control handle is used to select afilling or draining operation.

FORWARD DRAIN VALVE OPEN LIGHTThe forward drain valve open light comes on when theforward drain valve is open.The light has a filament press to test facility.

TANK FULL LIGHTThe tank full light comes on when the water tank isfull.The light has a filament press to test facility.

TANK DRAIN VALVE LIGHTThe tank drain valve light comes on when the tank drainvalve is open.The light has a filament press to test facility.

OVERFLOW VALVE LIGHTThe overflow valve light comes on when the overflowvalve is open.The light has a filament press to test facility.

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POTABLE WATER SYSTEM CONTROLS AND INDICATING - POTABLE WATER SERVICE PANELTMUWATR07-P01 LEVEL 1



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FORWARD WATER DRAIN PANELS

The Forward Water Drain Panels are located in the lowerpart of the forward fuselage.

DRAIN CONTROL HANDLESThe drain control handles are used for manuallyoperating of the forward drain valve.




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POTABLE WATER SYSTEM CONTROLS AND INDICATING - FORWARD WATER DRAIN PANELS



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FORWARD ATTENDANT PANEL

The Forward Attendant Panel (FAP) is located in theforward section of the cabin.

WATER QUANTITYThe Forward Attendant Panel displays the potable "WATerQuantiTY" stored in the potable water tank when the"IND ON" pushbutton is pressed in.The water quantity is also displayed when the potablewater service door is open.




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POTABLE WATER SYSTEM CONTROLS AND INDICATING - FORWARD ATTENDANT PANEL



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SELF EXAMINATION

How many potable water service and drain panels arefitted on the aircraft ?

A - One.B - Two.C - Three.

Where is the fill and drain valve port located ?A - On the potable water service panel.B - On the forward water drain panel.C - On both.

How many potable water quantity indicators arethere ?


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38-10-00 POTABLE WATER SYSTEM - COMPONENTS

CONTENTS:Water TankQuantity TransmitterWater Service Panel Door SwitchQuantity IndicatorControl HandleFill/Drain ValveForward Drain ValveWater HeaterManual Shut-Off ValveShuttle ValveAir FilterCheck ValvePressure Reducing/Relief Valve

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POTABLE WATER SYSTEM - COMPONENTS

WATER TANK

IDENTIFICATIONFIN: 3000MM

LOCATIONZONE: 138

DESCRIPTIONIt is made of Glass Fiber Reinforced Plastic (GFRP).It is strengthened to accept the rated pressure forthe potable water system (between 25 psi and 28 psi).The tank is attached to the aircraft structure withclamps and has a capacity: 200 l (53 US gal).The tank has:

- an overflow port,- an installation port for the quantitytransmitter,

- a connection for distribution,- a connection for air pressurization.

QUANTITY TRANSMITTER

IDENTIFICATIONFIN: 3MA

LOCATIONZONE: 138

DESCRIPTIONThe Quantity transmitter is installed in the watertank and monitors the volume of water remaining in thetank. It operates as a variable capacitor.The transmitter also has a low-level switch and high-level switch.The low-level switch opens when the water level dropsto a set level to disconnect electrical supply to thewater heaters in the lavatories.The high-level switch de-energizes a relay which closesthe fill/drain valve when the tank is full.

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POTABLE WATER SYSTEM - COMPONENTS - WATER TANK - QUANTITY TRANSMITTER



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WATER SERVICE PANEL DOOR SWITCH


LOCATIONZONE: 171

DESCRIPTIONThe microswitch closes to energize the indicatingsystem when the potable water service panel is openedfor ground servicing.The microswitch isolates the indicating system whenthe service door is closed again. The "IND ON"pushbutton, on the Forward Attendant Panel, overridesthe microswitch when pushed in.

QUANTITY INDICATOR


LOCATIONZONE: 171

DESCRIPTIONThe quantity indicator is supplied with the quantitytransmitter output signals. These signals move apointer over a scale calibrated in increments ofvolume.




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CONTROL HANDLE


LOCATIONZONE: 171

DESCRIPTIONWhen you pull the control handle out and select it to"FILL" or "DRAIN" position, the fill drain valve opens.During filling operation, when the tank is full, thecontrol handle has to be manually put back to the"NORMAL" position.

FILL/DRAIN VALVE


LOCATIONZONE: 171

DESCRIPTIONThe fill/drain valve is installed between the waterservice panel and the potable water tank. Tubeassemblies connect the valve to the tank and to theports on the potable water service panel. The "FILL"function of the valve also operates as a "DRAIN"facility. Fill and drain facilities are manuallyselected on the service panel. The fill/drain valvedrains the rear section of the potable waterdistribution system (tank included).




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FORWARD DRAIN VALVE

IDENTIFICATIONFIN: 4MP

LOCATIONZONE: 133

DESCRIPTIONThe forward drain valve drains the forward section ofthe potable water distribution system.When electrical power is available, the forward drainvalve is electrically controlled by operating thefill/drain valve handle.Without electrical power, the forward drain valve ismechanically controlled by operating the forward drainvalve handle.

WATER HEATER

LOCATIONZONE: Typical lavatory

DESCRIPTIONA water heater is installed under the wash basin insidethe sanitary unit cabinet. The potable water supplyline is connected to the heater inlet and the heateroutlet is connected to the water faucet.Capacity: 1.5 l (0.4 US gal).Temperature range: 45°C to 48°C (113°F to 118°F).Working pressure: 22 to 25 psi.An overtemperature safety device cuts off theelectrical power to the heating element when the watertemperature is above 60 ± 5°C (140 ± 9°F).This safety device can be reset with the resetpushbutton (under the cover).




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MANUAL SHUT-OFF VALVE


DESCRIPTIONWhen the manual shut-off valve is closed, it isolatesthe lavatory from the potable water distribution systemand from the toilet. The shut-off valve is locatedunder the toilet shroud.

NOTE: Wet galleys are equipped with their own shut-offvalves.

SHUTTLE VALVE


LOCATIONZONE: 137

DESCRIPTIONThe shuttle valve directs the pressurized air.It allows the water tank to be pressurized either fromthe bleed air crossfeed line or the ground pressureconnection.




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AIR FILTER


LOCATIONZONE: 137

DESCRIPTIONThe air filter removes all unwanted materials whichare in the compressed air.

CHECK VALVE


LOCATIONZONE: 137

DESCRIPTIONThe check valve is installed between the pressurereducing/relief valve and the air filter. It makessure that the compressed air flows only in thedirection of the potable water tank.




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PRESSURE REDUCING/RELIEF VALVE


LOCATIONZONE: 137

DESCRIPTIONThe pressure reducing/relief valve reduces the airpressure to the system working pressure 25 psi (1.75bar) to 28 psi (1.93 bar).Above 32 psi (2.21 bar), it operates as a relief valveto protect the water tank.




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38-10-00 POTABLE WATER SYSTEMDESCRIPTION/OPERATION

Contents:StoragePressurizationDistributionHeatingIndicationServicingSelf Examination

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POTABLE WATER SYSTEM DESCRIPTION/OPERATION

STORAGE

The potable water tank with a capacity of 200 l. (53US gallons) is installed in the pressurized underfloorarea LH behind the rear cargo compartment.

PRESSURIZATION

Compressed air is used to pressurize the system inorder to supply water from the tank to the necessaryservice locations. The compressed air is tapped fromthe cross feed-line of the engine bleed air and isconnected to the water tank air inlet.

DISTRIBUTION

Potable water from the water tank is supplied througha system of distribution lines which are routed belowthe passenger compartment floor. A part of the forwarddistribution line goes through a hose for addedprotection. The potable water distribution lines areinsulated and electrically heated to prevent iceformation in and around the lines.

HEATING

In each lavatory, a water heater is installed underthe wash basin. If the quantity transmitter detects alow level into the water tank, it cuts the electricalsupply of the water heater.A thermostat maintains the water temperature between45ºC (113ºF) and 48ºC (149ºF). An over temperaturesafety device protects the heating element.

INDICATION

The quantity indication system indicates how much wateris available in the potable water tank. The quantitytransmitter transmits the signal to the indicator onthe water service panel and to the Forward AttendantPanel. The TANK FULL light on the service panel comeson when the tank is full.

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SERVICING

Servicing of the potable water system can be done withor without electrical power. With electrical power, the single FILL/DRAIN handlemechanically operates the fill/overflow drain valveand electrically controls the forward drain valve. Without electrical power, the valves are individuallyoperated by cables.The draining operation is accomplished by opening thefill/overflow drain valve and the forward drain valve.The filling operation is accomplished by opening thefill/overflow drain valve and closing the forward drainvalve.When the tank is full, the quantity transmitter sendsa signal to close the fill/overflow drain valveautomatically.

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SELF EXAMINATION

Why is the potable water tank pressurized ?A - To ease the draining operation.B - To warm up the waterC - To enable water supply from the tank to

the service users.

How many valves are used during the draining operation ?


Where can the potable water quantity be checked ?A - On the indicator on the water service

panel only.B - On the FAP only.C - On the indicator on the water service

panel and on the FAP.

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CONTENTS:GeneralPotable Water Service PanelForward Water Drain PanelForward Attendant PanelSelf Examination

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GENERAL

The potable water controls and indicating includes thedisplay on the Forward Attendant Panel (FAP) and twopanels located at the bottom of the aircraft fuselage.



DOOR MICROSWITCHThe door microswitch isolates the indicating systemwhen the potable water service panel is closed.


FILL/DRAIN CONTROL HANDLEThe fill/drain control handle is used to control theopening or closure of the fill/overflow drain valveand the forward drain valve for filling/drainingoperations.


TANK FULL LIGHTThe tank full light comes on when the water tank isfull.The light has a filament press to test facility.T

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POTABLE WATER SYSTEM CONTROLS AND INDICATING - POTABLE WATER SERVICE PANEL



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FORWARD WATER DRAIN PANEL

The Forward Water Drain Panel is located on the forwardleft side lower fuselage.

DRAIN CONTROL HANDLEThe drain control handle is used for manual operationof the forward drain valve.




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SELF EXAMINATION



Where is the fill and drain valve port located ?A - On the potable water service panel.B - On the forward water drain panel.C - On both.



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38-10-00 POTABLE WATER SYSTEM COMPONENTS

CONTENTS:Water TankQuantity TransmitterWater Service Panel Door SwitchQuantity IndicatorControl HandleFill/Overflow Drain ValveForward Drain ValveWater HeaterManual Shut-off ValveShuttle ValveAir FilterCheck ValvePressure Reducing/Relief Valve

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POTABLE WATER SYSTEM COMPONENTS

WATER TANK

IDENTIFICATIONFIN : 3000MM

LOCATIONZONE : 171

DESCRIPTIONIt is made of Glass Fiber Reinforced Plastic (GFRP).It is strengthened to accept the rated pressure forthe potable water system (between 25 psi and 28 psi).The tank is attached to the aircraft structure withclamps and has a capacity : 200 l (53 US gal).The tank has:

- an overflow port- an installation port for thefill/overflow/drain valve

- an installation port for the quantitytransmitter

- a connection for distribution- a connection for air pressurization


IDENTIFICATIONFIN : 3MA

LOCATIONZONE : 171

DESCRIPTIONThe Quantity transmitter is installed in the watertank and monitors the volume of water in the tank. Itoperates as a variable capacitor.The transmitter also has a low-level switch and high-level switch.The low-level switch opens when the water level dropsto a set level to disconnect electrical supply to thewater heaters in the lavatories.The high-level switch de-energizes a relay which closesthe fill/overflow/drain valve when the tank is full.




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LOCATIONZONE : 171

DESCRIPTIONThe microswitch closes to energize the indicatingsystem when the potable water service panel is openedfor ground servicing.The microswitch isolates the indicating system whenthe service door is closed again. The "IND ON"pushbutton, on the Forward Attendant Panel, overridesthe microswitch when pushed in.

QUANTITY INDICATOR


LOCATIONZONE : 171

DESCRIPTIONThe quantity indicator is supplied with the quantitytransmitter output signals. These signals move apointer over a scale calibrated in increments ofvolume.




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CONTROL HANDLE


LOCATIONZONE : 171

DESCRIPTIONWhen you pull the control handle out and select it to"FILL" or "DRAIN" position, the fill/overflow drainvalve opens.During filling operation, when the tank is full, thecontrol handle comes back automatically to the "NORMAL"position.

FILL/OVERFLOW DRAIN VALVE


LOCATIONZONE : 171

DESCRIPTIONThe fill/overflow drain valve is installed between thewater service panel and the potable water tank. Tubeassemblies connect the valve to the tank and to theports on the potable water service panel. The ’fill’function of the valve also operates as a ’drain’facility. Fill and drain facilities are manuallyselected on the service panel. The overflow functionoperates as an overflow outlet and a vent for the tank.The fill/overflow drain valve drains the rear sectionof the potable water distribution system (tankincluded).




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FORWARD DRAIN VALVE

IDENTIFICATIONFIN : 4MP

LOCATIONZONE : 133

DESCRIPTIONThe forward drain valve drains the forward section ofthe potable water distribution system.When electrical power is available, the forward drainvalve is electrically controlled by operating thefill/overflow drain valve handle.Without electrical power, the forward drain valve ismechanically controlled by operating by the forwarddrain valve handle.

WATER HEATER

LOCATIONZONE : Typical lavatory

DESCRIPTIONA water heater is installed under the wash basin insidethe sanitary unit cabinet. The potable water supplyline is connected to the heater inlet and the heateroutlet is connected to the water faucet.Capacity : 1.5 l (0.4 US gal).Temperature range : 45°C to 48°C (113°F to 118°F).Working pressure : 22 to 25 psi.An overtemperature safety device cuts off theelectrical power to the heating element when the watertemperature is above 60 ± 5°C (140 ± 9°F).This safety device can be reset with the resetpushbutton (under the cover).




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DESCRIPTIONWhen the manual shut-off valve is closed, it isolatesthe lavatory from the potable water distribution systemand from the toilet. The shut-off valve is locatedunder the toilet shroud.

NOTE :Wet galleys are equipped with their own shut-offvalves.

SHUTTLE VALVE


LOCATIONZONE : 171

DESCRIPTIONThe shuttle valve directs the pressurized air.It allows the water tank to be pressurized either fromthe bleed air crossfeed line or the ground pressureconnection.




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FILTER


LOCATIONZONE : 171

DESCRIPTIONThe air filter removes all unwanted materials whichare in the compressed air.

CHECK VALVE


LOCATIONZONE : 171

DESCRIPTIONThe check valve is installed between the pressurereducing/relief valve and the air filter. It makessure that the compressed air flows only in thedirection of the potable water tank.




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POTABLE WATER SYSTEM COMPONENTS - FILTER - CHECK VALVETMUWATS02-P06 LEVEL 3



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LOCATIONZONE : 171

DESCRIPTIONThe pressure reducing/relief valve reduces the airpressure from between 41 psi (2.83 bar) and 47 psi(3.24 bar) to the system working pressure 25 psi (1.75bar) to 28 psi (1.93 bar).Above 32 psi (2.21 bar), it operates as a relief valveto protect the water tank.




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POTABLE WATER SYSTEM COMPONENTS - PRESSURE REDUCUNG/RELIEF VALVE -

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TMUWATS02 LEVEL 3



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38-10-00 POTABLE WATER SYSTEMDESCRIPTION/OPERATION

Contents:StoragePressurizationDistributionHeatingIndicationServicingSelf Examination

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STORAGE

The potable water tank with a capacity of 200 l. (53US gallons) is installed in the pressurized underfloorarea LH behind the rear cargo compartment.

PRESSURIZATION

Compressed air is used to pressurize the system inorder to supply water from the tank to the necessaryservice locations. The compressed air is tapped fromthe cross feed-line of the engine bleed air and isconnected to the water tank air inlet. On ground, when the bleed air system is not available,the ground air pressure supply system is used.If installed, an optional compressor ensurespressurization in case of bleed air decrease.

DISTRIBUTION

Potable water from the water tank is supplied througha system of distribution lines which are routed belowthe passenger compartment floor. A part of the forwarddistribution line goes through a hose for addedprotection. The potable water distribution lines areinsulated and electrically heated to prevent iceformation in and around the lines.

HEATING

In each lavatory, a water heater is installed underthe wash basin. If the quantity transmitter detects alow level into the water tank, it cuts the electricalsupply of the water heater.A thermostat maintains the water temperature between45ºC (113ºF) and 48ºC (149ºF). An over temperaturesafety device protects the heating element.

INDICATION

The quantity indication system indicates how much wateris available in the potable water tank. The quantitytransmitter transmits the signal to the indicator onthe water service panel and to the Forward AttendantPanel. The TANK FULL light on the service panel comeson when the tank is full.

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SERVICING

Servicing of the potable water system can be done withor without electrical power. With electrical power, the single FILL/DRAIN handlemechanically operates the fill/overflow drain valveand electrically controls the forward drain valve. Without electrical power, the valves are individuallyoperated by cables.The draining operation is accomplished by opening thefill/overflow drain valve and the forward drain valve.The filling operation is accomplished by opening thefill/overflow drain valve and closing the forward drainvalve.When the tank is full, the quantity transmitter sendsa signal to close the fill/overflow drain valveautomatically.

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SELF EXAMINATION

Why is the potable water tank pressurized ?A - To ease the draining operation.B - To warm up the waterC - To enable water supply from the tank to

the service users.

How many valves are used during the draining operation ?


Where can the potable water quantity be checked ?A - On the indicator on the water service

panel only.B - On the FAP only.C - On the indicator on the water service

panel and on the FAP.

TMUWATB0A LEVEL 2



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TMUWATB0A LEVEL 2



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CONTENTS:GeneralPotable Water Service PanelForward Water Drain PanelForward Attendant PanelSelf Examination

TMUWATR0C LEVEL 1



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GENERAL

The potable water controls and indicating includes thedisplay on the Forward Attendant Panel (FAP) and twopanels located at the bottom of the aircraft fuselage.



DOOR MICROSWITCHThe door microswitch isolates the indicating systemwhen the potable water service panel is closed.When the door is open, the electric motor of thecompressor is stopped.


FILL/DRAIN CONTROL HANDLEThe fill/drain control handle is used to fill or drainwater tank during filling or draining operations.


TANK FULL LIGHTThe tank full light comes on when the water tank isfull.The light has a filament press to test facility.T

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POTABLE WATER SYSTEM CONTROLS AND INDICATING - POTABLE WATER SERVICE PANELTMUWATR0C-P01 LEVEL 1



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FORWARD WATER DRAIN PANEL

The Forward Water Drain Panel is located in the forwardleft side lower fuselage.

DRAIN CONTROL HANDLEThe drain control handle is used for manually operatingof the forward drain valve.

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POTABLE WATER SYSTEM CONTROLS AND INDICATING - FORWARD WATER DRAIN PANEL



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TMUWATR0C-T03 LEVEL 1



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TMUWATR0C-P03 LEVEL 1




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SELF EXAMINATION



Where is the fill and drain valve located ?A - On the potable water service panel.B - On the forward water drain panel.C - On both.



TMUWATR0C LEVEL 1



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38-10-00 POTABLE WATER SYSTEM - COMPONENTS

CONTENTS:Water TankQuantity TransmitterWater Service Panel Door SwitchQuantity IndicatorControl HandleFill/Overflow Drain ValveForward Drain ValveWater HeaterManual Shut-off ValveShuttle ValveAir FilterCheck ValvePressure Reducing/Relief ValveCompressorCheck ValveAir FilterPressure Switch

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WATER TANK


LOCATIONZONE: 171

COMPONENT DESCRIPTIONIt is made of Glass Fiber Reinforced Plastic (GFRP).It is strengthened to accept the rated pressure forthe potable water system (between 25 psi and 28 psi).The tank is attached to the aircraft structure withclamps and has a capacity: 200 l (53 US gal).The tank has:

- an overflow port,- an installation port for thefill/overflow/drain valve,

- an installation port for the quantitytransmitter,

- a connection for distribution,- a connection for air pressurization.



LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe quantity transmitter is installed in the watertank and monitors the volume of water remaining in thetank. It operates as a variable capacitor.The transmitter also has a low-level switch and high-level switch.The low-level switch opens when the water level dropsto a set level to disconnect electrical supply to thewater heaters in the lavatories.The high-level switch de-energizes a relay which closesthe fill/overflow/drain valve when the tank is full.

TMUWATS0B-T01 LEVEL 3



UFD4200


POTABLE WATER SYSTEM - COMPONENTS - WATER TANK - QUANTITY TRANSMITTERTMUWATS0B-P01 LEVEL 3



UFD4200





LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe microswitch closes to energize the indicatingsystem when the potable water service panel is openedfor ground servicing.The microswitch isolates the indicating system whenthe service door is closed again. The "IND ON"pushbutton, on the Forward Attendant Panel, overridesthe microswitch when pushed in.

QUANTITY INDICATOR


LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe quantity indicator is supplied with the quantitytransmitter output signals. These signals move apointer over a scale calibrated in increments ofvolume.




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - DOOR SWITCH - QUANTITY INDICATORTMUWATS0B-P02 LEVEL 3



UFD4200



CONTROL HANDLE


LOCATIONZONE: 171

COMPONENT DESCRIPTIONWhen you pull the control handle out and set it to"FILL" or "DRAIN" position, the fill/overflow drainvalve opens.During filling operation, when the tank is full, thecontrol handle comes back automatically to the "NORMAL"position.

FILL/OVERFLOW DRAIN VALVE


LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe fill/overflow drain valve is installed between thewater service panel and the potable water tank. Tubeassemblies connect the valve to the tank and to theports on the potable water service panel. The "FILL"function of the valve also operates as a "DRAIN"facility. Fill and drain facilities are manuallyselected on the service panel. The overflow functionoperates as an overflow outlet and a vent for the tank.The fill/overflow drain valve drains the rear sectionof the potable water distribution system (tankincluded).




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - CONTROL HANLDE - FILL/OVERFLOW DRAIN VALVETMUWATS0B-P03 LEVEL 3



UFD4200



FORWARD DRAIN VALVE

IDENTIFICATIONFIN: 4MP

LOCATIONZONE: 133

COMPONENT DESCRIPTIONThe forward drain valve drains the forward section ofthe potable water distribution system.When electrical power is available, the forward drainvalve is electrically controlled by operating thefill/overflow drain valve handle.Without electrical power, the forward drain valve ismechanically controlled by operating by the forwarddrain valve handle.

WATER HEATER

IDENTIFICATIONFIN:


COMPONENT DESCRIPTIONA water heater is installed under the wash basin insidethe sanitary unit cabinet. The potable water supplyline is connected to the heater inlet and the heateroutlet is connected to the water faucet.Capacity: 1.5 l (0.4 US gal).Temperature range: 45°C to 48°C (113°F to 118°F).Working pressure: 22 to 25 psi.An overtemperature safety device cuts off theelectrical power to the heating element when the watertemperature is above 60 ± 5°C (140 ± 9°F).This safety device can be reset with the resetpushbutton (under the cover).




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - FORWARD DRAIN VALVE - WATER HEATERTMUWATS0B-P04 LEVEL 3



UFD4200




IDENTIFICATIONFIN:


COMPONENT DESCRIPTIONWhen the manual shut-off valve is closed, it isolatesthe water faucet from the potable water distributionsystem and from the toilet. The shut-off valve islocated under the toilet shroud.

NOTE: Wet galleys are equipped with their own shut-offvalves.

SHUTTLE VALVE


LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe shuttle valve directs the pressurized air.It allows the water tank to be pressurized either fromthe bleed air crossfeed line or the ground pressureconnection.




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - MANUAL SHUT-OFF VALVE - SHUTTLE VALVETMUWATS0B-P05 LEVEL 3



UFD4200



AIR FILTER


LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe air filter removes all unwanted materials whichare in the compressed air.

CHECK VALVE


LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe check valve is installed between the pressurereducing/relief valve and the air filter. It makessure that the compressed air flows only in thedirection of the potable water tank.




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - AIR FILTER - CHECK VALVETMUWATS0B-P06 LEVEL 3



UFD4200





LOCATIONZONE: 171

COMPONENT DESCRIPTIONThe pressure reducing/relief valve reduces the airpressure from between 41 psi (2.83 bar) and 47 psi(3.24 bar) to the system working pressure 25 psi (1.75bar) to 28 psi (1.93 bar).Above 32 psi (2.21 bar), it operates as a relief valveto protect the water tank.

COMPRESSOR

IDENTIFICATIONFIN: 8MD

LOCATIONZONE: 163

COMPONENT DESCRIPTIONThe compressor is a double-bellows reciprocating pumpthat is electrically driven. It has:

- an electric motor,- a housing,- a crankshaft,- bearings,- inlet and outlet valves,- two drive rods,- two bellows (which function as a double-pistonair compressor unit).

The electrical motor is fan cooled and has its ownhousing. The motor operates at 3600 rpm when it issupplied with 115 VAC 400Hz from the 3 phase currentof AC BUS 2. A thermal-overload protection circuitmomentarily stops the motor in case of overheat.The air compressor supplies approximately two cubicfeet of clean compressed air to the potable water tankat a pressure of 37 psi (2.55 bar). The pressure inthe tank is increased to 28 psi (1.93 bar).




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - PRESSURE REDUCUNG/RELIEF VALVE - COMPRESSORTMUWATS0B-P07 LEVEL 3



UFD4200



CHECK VALVE


LOCATIONZONE: 163

COMPONENT DESCRIPTIONThe check valve makes sure that the compressed airflows only in the direction of the potable water tank.

AIR FILTER


LOCATIONZONE: 163

COMPONENT DESCRIPTIONThe air filter stops the ingress of impurities intothe system from the air around the compressor.




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - CHECK VALVE - AIR FILTERTMUWATS0B-P08 LEVEL 3



UFD4200



PRESSURE SWITCH

IDENTIFICATIONFIN: 10MD

LOCATIONZONE: 163

COMPONENT DESCRIPTIONThe pressure switch senses the pressure in the potablewater tank. It also switches the electric motor of thecompressor on and off. At 28 psi (1.93 bar), thepressure switch disconnects the 28 V DC line from therelay to stop the electric motor. When the pressurein the potable water tank is 25 psi (1.72 bar) thepressure switch connects the 28 V DC line to start theelectric motor to pressurize the system.




UFD4200


POTABLE WATER SYSTEM - COMPONENTS - PRESSURE SWITCHTMUWATS0B-P09 LEVEL 3



UFD4200



TMUWATS0B LEVEL 3



UFD4200


38 - WATER/WASTE SYSTEM

38-32-00 WASTE WATER SYSTEMDESCRIPTION/OPERATION

CONTENTSGeneralDrain AssemblyDrain ValveDrain MastSelf Examination

TMUWATC02 LEVEL 1



UFD4200


WASTE WATER SYSTEM DESCRIPTION/OPERATION

GENERAL

The waste water drain system disposes waste water fromthe lavatory wash basins and from the galley sinks.

DRAIN ASSEMBLY

Each lavatory wash basin has a drain assembly with avalve actuated by a control knob and a cable.

NOTE: The control knob is operated by the lavatoryuser.

DRAIN VALVE

Each drain valve opens only when a certain amount ofwater is collected.This prevents a permanent loss of cabin airpressurization through the drain lines.

DRAIN MAST

In flight, differential pressure between the cabin andthe drain mast outlet disgards the waste water.On ground, gravity disgards the waste water.The drain masts are electrically heated to prevent iceformation.

TMUWATC02-T01 LEVEL 1



UFD4200


WASTE WATER SYSTEM DESCRIPTIONTMUWATC02-P01 LEVEL 1



UFD4200


SELF EXAMINATION

Why are drain valves installed in the waste waterdrain system ?

A - To allow the sinks and wash basins to beisolated.

B - To prevent a permanent loss of cabin airpressurization.

C - To prevent wash basins from beingisolated.

TMUWATC02 LEVEL 1



UFD4200



38-32-00 WASTE WATER SYSTEM COMPONENTS

CONTENTS:Galley & Lavatory Drain ValveLavatory Drain AssemblyDrain Mast

TMUWATU09 LEVEL 3



UFD4200


WASTE WATER SYSTEM COMPONENTS

GALLEY & LAVATORY DRAIN VALVE

IDENTIFICATIONFIN:

LOCATIONZONE: Typical Wet Galley / Typical Lavatory

COMPONENT DESCRIPTIONOn ground, the drain valve is open. During flight, thevalve is held closed by pressurized cabin air. Thevalve opens when the waste water, which enters thevalve, has built up enough pressure to displace thediaphragm. This prevents leakage of cabin air throughthe drain line.The drain valve can be manually operated by liftingthe seal assembly using the pull ring.

LAVATORY DRAIN ASSEMBLY

IDENTIFICATIONFIN:

LOCATIONZONE: Typical Lavatory

COMPONENT DESCRIPTIONThe lavatory wash basins have a drain valve assemblyfor the drainage of the waste water. The wash basindrain valve has a connection for the drain line. Acontrol cable connects a poppet to a control knob onthe back of the sink. The knob can be turned to openor to close the valve.

TMUWATU09-T01 LEVEL 3



UFD4200


WASTE WATER SYSTEM COMPONENTS - GALLEY & LAVATORY DRAIN VALVE - LAVATORY DRAIN ASSEMBLYTMUWATU09-P01 LEVEL 3



UFD4200


WASTE WATER SYSTEM COMPONENTS

DRAIN MAST

IDENTIFICATIONFIN: 4DU, 14DU

LOCATIONZONE: 133, 172

COMPONENT DESCRIPTION2 Drain masts are installed on the lower fuselage shellto discard waste water. Each drain mast has a draintube, an integrated electrical heating element and aflange for the installation of the drain mast.

TMUWATU09-T02 LEVEL 3



UFD4200


WASTE WATER SYSTEM COMPONENTS - DRAIN MASTTMUWATU09-P02 LEVEL 3



UFD4200



TMUWATU09 LEVEL 3



UFD4200



38-31-00 VACUUM TOILET SYSTEM PRINCIPLE

CONTENTS:GeneralRinse/Flush ControlVacuum ControlSelf Examination

TMUWATQ02 LEVEL 2

EFFECTIVITY 38-31-00 Page 1Oct 31/99


UFD4200


VACUUM TOILET SYSTEM PRINCIPLE

GENERAL

Potable water from the aircraft pressurized potablewater system is used to rinse the toilet bowl.Differential pressure between the cabin and theatmosphere moves the waste from the toilet bowl to thewaste holding tank.This difference of pressure can be caused by the vacuumgenerator or by aircraft pressurization.

RINSE/FLUSH CONTROL

A Flush Control Unit (FCU) per toilet controls therinse and flush cycle.

VACUUM CONTROL

As soon as a flush switch is pressed, electrical poweris supplied to the vacuum system controller.At high altitude, the altitude pressure switch stopsthe electrical supply of the vacuum generator, thedifferential pressure between the cabin and theatmosphere being sufficient to move the waste from thetoilet bowl to the waste holding tank.At low altitude or on ground, the altitude pressureswitch stays closed. The vacuum generator generatesthe necessary differential pressure.

TMUWATQ02-T01 LEVEL 2



UFD4200


TOILET SYSTEM PRESENTATIONTMUWATQ02-P01 LEVEL 2



UFD4200


SELF EXAMINATION

On ground, when does the vacuum generator startto operate?

A - As soon as the aircraft is energized.B - As soon as the flush switch is pressed

in, and only if the altitude pressureswitch is closed.

C - As soon as the altitude pressure switchcloses.

What happens when the flush switch is pressed athigh altitude?

A - As the differential pressure between thecabin and the atmosphere is sufficient,the vacuum generator does not operate.

B - As the differential pressure between thecabin and the atmosphere is notsufficient, the vacuum generator doesnot operate.

C - As the differential pressure between thecabin and the atmosphere is sufficient,the vacuum generator operates.

TMUWATQ02 LEVEL 2



UFD4200



38-31-00 TOILET SYSTEMDESCRIPTION/OPERATION

CONTENTS:GeneralFlushingVacuumStorageControl/MonitoringIndicatingServicingSelf Examination

TMUWATD04 LEVEL 2



UFD4200


TOILET SYSTEM DESCRIPTION/OPERATION

GENERAL

The toilet system removes waste from the toilet bowlthrough a vacuum drain to an underfloor waste holdingtank. An electronic Vacuum System Controller controlsand monitors the system and the related electriccomponents.The system uses potable water from the potable watersystem to rinse the toilet.

FLUSHING

When the flush switch is pressed, the Flush ControlUnit (FCU) initiates the flush sequence.The vacuum generator starts to operate and after 1second the water valve opens for 1 second.Then, the flush valve, controlled by the FCU, opensfor 4 seconds to evacuate the waste material throughdifferential pressure.

VACUUM

As soon as the flush switch is pressed, the FCU sendsan electrical signal to the Vacuum System Controllerwhich operates the vacuum generator for approximately15 seconds.The vacuum generator creates the necessarydifferential pressure between the cabin and the wasteholding tank to move the waste from the toilet bowl.Above 4877 m. (16000 ft.) altitude during climb anddown to 3658 m. (12000 ft.) altitude during descent,the Vacuum System Controller receives an electricalsignal from the altitude switch and stops theelectrical power to the vacuum generator.Note: the landing gear signal is used as a back up in

case of altitude pressure switch failure.

STORAGE

The waste holding tank is installed on the right ofthe aircraft under the floor between FR 65 and FR 68.The tank has a capacity of 170 l. (44.9 US gal.).The tank has:

- a water separator,- a liquid level transmitter (hydrostaticpressure),

- a liquid level sensor (ultrasonic type),- waste inlets,- a waste outlet,- a rinse connection.

TMUWATD04-T01 LEVEL 2



UFD4200


TMUWATD04-P01 LEVEL 2




UFD4200



CONTROL/MONITORING

The Vacuum System Controller (VSC) controls andmonitors the toilet system operation. It also reportsthe vacuum toilet system failures to the CFDS and tothe RS 232-C interface for shop maintenance.

INDICATING

The waste holding tank is equipped with a liquid leveltransmitter and a liquid level sensor.When the tank is full, the VSC shuts down the toiletsystems and sends a "SYSTEM INOP" message to theforward attendant panel.

SERVICING

The waste holding tank is serviced from a service panelwhich is located on the right of the lower fuselagebetween FR 65 and FR 66.It has:

- a drain connection,- a rinse connection,- a waste quantity indicator,- a waste drain valve control handle,- a limit switch.

During servicing, the FCUs are automaticallyde-activated. Thus, toilet use is inhibited duringservicing.The waste drain control handle mechanically operatesthe drain valve.

TMUWATD04-T01 LEVEL 2



UFD4200


SELF EXAMINATION

Where does the toilet bowl rinsing water come from?A - Waste holding tank.B - Waste water tank.C - Potable water tank.

How is the waste transported to the waste holdingtank?

A - By the vacuum created in the waste tank.B - By water flushing and gravity.C - By water pressure.

When does the vacuum generator operate?A - On ground only.B - Up to an altitude of 4877 m. (16000ft.)

during climb and below 3658 m. (12000ft.) during descent.

C - During servicing operations.

TMUWATD04 LEVEL 2



UFD4200



TMUWATD04 LEVEL 2



UFD4200



38-31-00 TOILET SYSTEM CONTROLS ANDINDICATING

CONTENTS:GeneralToilet Service PanelForward Attendant PanelSelf Examination

TMUWATV02 LEVEL 1

EFFECTIVITY 38-31-00 Page 1Nov 30/95


UFD4200


TOILET SYSTEM CONTROLS AND INDICATING

GENERAL

The toilet system controls and indicating includes thedisplay on the Forward Attendant Panel (FAP) and onthe toilet service panel located at the bottom of theaircraft fuselage.

TOILET SERVICE PANEL

The toilet service panel is installed in the rear rightside of the fuselage.

DOOR LIMIT SWITCHOn ground, when the toilet service panel door is open,the Vacuum System Controller stops all toiletoperations and flush signals are inhibited.

DRAIN CONTROL HANDLEDuring ground service, when deployed, the drain controlhandle allows the waste holding tank to be drained.

WASTE QUANTITY INDICATORThe WASTE QUANTITY INDICATOR displays the wastequantity stored in the waste holding tank.

TMUWATV02-T01 LEVEL 1



UFD4200


TOILET SYSTEM CONTROLS AND INDICATING - TOILET SERVICE PANELTMUWATV02-P01 LEVEL 1



UFD4200


TOILET SYSTEM CONTROLS AND INDICATING



WASTE QTYThe Forward Attendant Panel displays the waste quantitystored in the waste holding tank when the Vacuum SystemController is not receiving any flush signals.

LAV INOPThe "LAVatory INOPerative" light comes on when therelated lavatory Flush Control Unit has failed.

SYS INOPThe "SYStem INOPerative" light comes on when the wasteholding tank is full or in case of vacuum generatorfailure.

NOTE: On ground, when the toilet service panel is openthe "SYS INOP" light comes on.

TMUWATV02-T02 LEVEL 1



UFD4200


TMUWATV02-P02 LEVEL 1

TOILET SYSTEM CONTROLS AND INDICATING - FORWARD ATTENDANT PANEL



UFD4200


SELF EXAMINATION

How many toilet service panels are fitted on theaircraft?


Where is the waste quantity displayed?A - On the toilet service panel.B - On the Forward Attendant Panel.C - On both panels.

TMUWATV02 LEVEL 1



UFD4200



38-31-00 TOILET SYSTEM MONITORING

Contents:GeneralFlush Control Unit (FCU)Vacuum System Controller (VSC)FAP IndicatingSelf examination

TMUWATE01 LEVEL 3



UFD4200


TOILET SYSTEM MONITORING

GENERAL

The toilet system is monitored by the Vacuum SystemController Built-In Test Equipment (BITE).During aircraft power-up on ground and during flight,the operation of the VSC internal and external circuitsare monitored continiously.

FLUSH CONTROL UNIT

The BITE in each FCU monitors the water valve, theflush valve and the internal control circuitry.If a fault is detected, it is transmitted to the VacuumSystem Controller.

VACUUM SYSTEM CONTROLLER

The VSC functions are:- system control and monitoring- fault reporting

The VSC calculates and transmits signals to the FAPand the waste service panel to indicate the waste tanklevel and to report system defects.System defects are also sent to the ARINC 429 data Buswhich is connected to the CFDS and to the RS 232-Cinterface unit for ground maintenance and inspection.

FAP INDICATING

The waste tank level can be displayed on the ForwardAttendant Panel. The FAP also indicates if a lavatoryis inoperative or if the whole toilet system isinoperative.Examples:

- Flush Control Unit X defect: LAV X INOP- VSC no flush signal: waste tank level indicated- 115 V AC defect: SYSTEM INOP- Level transmitter shows tank full and levelsensor does not: SYSTEM INOP

- Service door open and landing gear down:SYSTEM INOP

TMUWATE01-T01 LEVEL 3



UFD4200


TMUWATE01-P01 LEVEL 3

TOILET SYSTEM MONITORING



UFD4200


SELF EXAMINATION

The toilet system is monitored by:A - The FCU BITE.B - The CFDS.C - The VSC BITE.

The water valve and the flush valve are moniteredby :

A - The Vacuum System Controller.B - The vacuum generator.C - The associated Flush Control Unit BITE.

What are the funcions of the VSC ?A - System control and monitoring and fault

reporting.B - System control and monitoring.C - Fault reporting.

TMUWATE01 LEVEL 3



UFD4200



38-31-00 TOILET SYSTEM COMPONENTS

CONTENTS:Waste Holding TankWater SeparatorWaste Level TransmitterWaste Level SensorVacuum GeneratorAltitude Pressure SwitchVacuum System ControllerDrain Control HandleWaste Drain ValveDoor Limit SwitchCheck Valve (Rinse Line)Check Valve (Vacuum Pressure)

TMUWAVY03 LEVEL 3

EFFECTIVITY 38-31-00 Page 1Apr 30/96


UFD4200


TOILET SYSTEM COMPONENTS

WASTE HOLDING TANK


LOCATIONZONE : 172

DESCRIPTIONThe waste holding tank is installed on the right ofthe aircraft under the floor.The tank is a filament wound cylindrical vessel witha toilet waste capacity of 170 l (45 USgal).The tank has:

- a water separator- a liquid level transmitter- a liquid level sensor- waste inlets- a waste outlet- a rinse connection

WATER SEPARATOR


LOCATIONZONE : 172

DESCRIPTIONThe water separator is installed on the top of thewaste holding tank. It has an upper and a lower section.The two sections must be taken apart for servicing ofthe filter in the lower section. The upper section hasan air outlet for the vacuum line.

TMUWAVY03-T01 LEVEL 3



UFD4200


TOILET SYSTEM COMPONENTS - WASTE HOLDING TANK - WATER SEPARATORTMUWAVY03-P01 LEVEL 3



UFD4200



WASTE LEVEL TRANSMITTER

IDENTIFICATIONFIN : 40MG

LOCATIONZONE : 172

DESCRIPTIONThe liquid level transmitter is installed in the bottomof the waste holding tank. It gives the waste contentslevel of the waste holding tank from empty to full.It measures the hydrostatic pressure of the water headand sends an analog signal to the Vacuum SystemController (VSC).

WASTE LEVEL SENSOR


LOCATIONZONE : 172

DESCRIPTIONThe liquid level sensor is installed in the uppersection of the waste holding tank. It is an ultrasonictype sensor.It sends a signal to the Vacuum System Controller(VSC). It operates independently of the liquid leveltransmitter.




UFD4200


TOILET SYSTEM COMPONENTS - WASTE LEVEL TRANSMITTER - WASTE LEVEL SENSORTMUWAVY03-P02 LEVEL 3



UFD4200



VACUUM GENERATOR


LOCATIONZONE : 172

DESCRIPTIONThe vacuum generator is installed on the right of theaircraft under the floor. It is a self-containedcentrifugal unit with normal thermal overloadprotection.The generator air inlet is connected with the waterseparator air outlet. The generator air outlet isconnected to the aircraft overboard vent line.The vacuum generator is controlled by the VSC and givesthe necessary vacuum pressure in the waste holdingtank to move the waste from the bowl to the tank.

ALTITUDE PRESSURE SWITCH


LOCATIONZONE : 312

DESCRIPTIONThe altitude pressure switch is electrically connectedto the Vacuum System Controller (VSC). It gives anelectrical signal to the VSC which starts or stops theoperation of the vacuum generator.




UFD4200


TOILET SYSTEM COMPONENTS - VACUUM GENERATOR - ALTITUDE PRESSURE SWITCHTMUWAVY03-P03 LEVEL 3



UFD4200



VACUUM SYSTEM CONTROLLER


LOCATIONZONE : 172

DESCRIPTIONThe Vacuum System Controller (VSC) functions are :

- system control and monitoring,- fault recording.

It is electrically connected to the A/C power circuit.The VSC calculates and transmits signals to the ForwardAttendant Panel to indicate the waste tank levels andreport system defects.The VSC also signals the system defects to the ARINC429 data bus which is connected to the CFDS.

DRAIN CONTROL HANDLE


LOCATIONZONE : 172

DESCRIPTIONThe drain control handle is used to open or to closethe waste drain valve.




UFD4200


TOILET SYSTEM COMPONENTS - VACUUM SYSTEM CONTROLLER - DRAIN CONTROL HANDLETMUWAVY03-P04 LEVEL 3



UFD4200



WASTE DRAIN VALVE


LOCATIONZONE : 172

DESCRIPTIONThe waste drain valve is installed in the waste drainline. It is a ball type manually operated shut-offvalve.

DOOR LIMIT SWITCH


LOCATIONZONE : 172

DESCRIPTIONThe door limit switch indicates to the VSC that thetoilet service panel access door is open.On ground, when the access door is open, the VSC stopsall toilet operations and flush signals are inhibited.




UFD4200


TOILET SYSTEM COMPONENTS - WASTE DRAIN VALVE - DOOR LIMIT SWITCHTMUWAVY03-P05 LEVEL 3



UFD4200



CHECK VALVE (RINSE LINE)


LOCATIONZONE : 172

DESCRIPTIONThe Check valve is installed in the rinse line of thewaste holding tank. It lets water flow in only onedirection

CHECK VALVE (VACUUM PRESSURE)


LOCATIONZONE : 172

DESCRIPTIONThe check valve is installed in the waste holding tankair outlet line and parallel to the vacuum generatorline. It lets air flow from the tank to the overboardvent line and stops opposite air flow.




UFD4200


TOILET SYSTEM COMPONENTS - CHECK VALVE (RINSE LINE) - CHECK VALVE (VACUUM PRESSURE)TMUWAVY03-P06 LEVEL 3



UFD4200



TMUWAVY03 LEVEL 3



UFD4200



38-31-00 TOILET ASSEMBLY COMPONENTS

CONTENTS:Bowl and Spray RingFlush Control UnitWater ValveFlush ValveAnti Syphon Valve

TMUWAVZ02 LEVEL 3

EFFECTIVITY 38-31-00 Page 1OCT 31/99


UFD4200


TOILET ASSEMBLY COMPONENTS

BOWL AND SPRAY RING

IDENTIFICATIONFIN : Part of toilet assembly (50MG)This component is an SRU (Shop Replaceable Unit).


DESCRIPTIONThe bowl is made of stainless-steel and has a nonstickcoating applied to its inside surface.The spray ring is attached to the top of the bowl andconnected to the anti-syphon valve.

FLUSH CONTROL UNIT



DESCRIPTIONThe Flush Control Unit (FCU) is an electronic assembly.It is electrically connected to :

- the flush switch,- the water valve,- the flush valve,- the vacuum system controller (VSC).

The FCU controls the flush cycle.Built-in-Test-Equipment (BITE) monitors the operationof the water valve, flush valve and its internalcontrol board circuitry. Faults are transmitted to theVSC.

TMUWAVZ02-T01 LEVEL 3



UFD4200


TOILET ASSEMBLY COMPONENTS - BOWL & SPRAY RING - FLUSH CONTROL UNITTMUWAVZ02-P01 LEVEL 3



UFD4200



WATER VALVE



DESCRIPTIONThe water valve is solenoid controlled and electricallyconnected to the Flush Control Unit. The water valveopens 1 second after operation of the flush switch andstays open for 1 second.The water valve is equipped with an anti-syphon valveto permit water to flow only in the direction of thespray ring and it returns any back-water to the bowl.

FLUSH VALVE



DESCRIPTIONThe flush valve is a motor-actuated unit. A ductconnects the flush valve to the toilet bowl. The flushvalve is a stainless-steel investment casting. Thetube is fully open during a flush cycle. Amotor-actuated pinch-knife closes and seals the tubebetween the flush cycles.The flush valve operation is controlled by the FCU.




UFD4200


TOILET ASSEMBLY COMPONENTS - WATER VALVE - FLUSH VALVETMUWAVZ02-P02 LEVEL 3



UFD4200



ANTI-SYPHON VALVE



DESCRIPTIONThe anti-syphon valve is installed above the toiletbowl and is connected to the water valve and the sprayring. It permits water to flow only in the directionof the spray ring and it returns any back-water to thebowl.




UFD4200


TOILET ASSEMBLY COMPONENTS - ANTI-SYPHON VALVETMUWAVZ02-P03 LEVEL 3



UFD4200



TMUWAVZ02 LEVEL 3



UFD4200



38-00-00 POTABLE WATER SYSTEM SERVICING

Contents:FillingDrainingMiscellaneous

TMUWATG01 LEVEL 3

EFFECTIVITY 38-00-00 Page 1Dec 31/95


UFD4200


FILLING

PREPARATIONThe water service panel is located on the left sideof the aft fuselage.Electricity must be supplied to the panel. Use groundpower and turn on the maintenance bus (MAINT BUS ON)switch.When the panel door is open, the light on the fillgauge indicates that the panel has power.As a back-up check for electricity, press any one ofthe four indicator lights, they should light up.Do not attempt to fill or empty the water system withouta powered panel.Also on panel are the fill and drain port and thecontrol handle.

OPERATIONTo fill the water system, open the service door.Connect the fill hose to the port.Turn the control handle counter clockwise to the FILLposition and pull out on the handle.Make sure the overflow valve opens : the indicatorlight should light up.Turn on the water pump at the truck.The quantity gauge will show when the system is takingon water.When the tank is full the FULL light should come on.Turn off the pump of the truck.Push the control handle in, it is spring loaded andshould return to the NORMAL position by itself.Disconnect the hose and cap the port.

CLOSINGBefore closing the door, clean and dry the servicepanel and check for leaks, then close the access door.

TMUWATG01-T01 LEVEL 3



UFD4200


DRAINING

PREPARATIONThree drain ports controlled by the service panel areused to empty the water system.The main drain port is located on the underside of theaircraft directly below the water tank and next to theoverflow port.A few feet ahead of the main drain is another drainport for the forward lav and galley lines.The port on the water service panel is used to drainthe lines for the rear lavs and galley.To drain the water system move a container under themain port.

OPERATIONAt the control panel, uncap the port.Turn the control handle clockwise to the DRAIN positionand pull the handle out.Three indicator lights should come on. They are : theOVERFLOW VALVE OPEN light, the TANK DRAIN VALVE OPENlight and the FORWARD DRAIN VALVE OPEN light.Most of the water will come out of the main drain,only a small amount will come out of the forward andaft drains.When the system is drained, push the control handlein.Make sure that it returns to the NORMAL position.All the indicator lights should go off.Replace the drain cap.

CLOSING

Make sure the service panel is clean and dry.Then close the panel door.




UFD4200


MISCELLANEOUS

Without electricity, you will have to use the followingmanual overrides :- for filling, open the overflow valve,- for draining, open both valves of the main drain andthe one of the forward drain.




UFD4200



38-10-00 POTABLE WATER SYSTEM SERVICING

CONTENTSNORMAL FILLINGMANUAL FILLING

TMUWATX03 LEVEL 1



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POTABLE WATER SYSTEM SERVICING

NORMAL FILLING

The water service panel is located on the left sideof the fuselage.Electricity must be supplied to the panel. Use groundpower and turn on the maintenance bus (MAINT BUS ONswitch).When the service panel is opened, the light on thefill gauge indicates that the panel has power. Alsoon the panel are the fill and drain port and the controlhandle.To fill the water system, connect the fill hose to theport. Turn the control handle couterclockwise to theFILL position and pull out on the handle. Turn on the water pump on the truck.The quantity gauge will show when the system is takingon water. When the tank is full, the FULL light comeson. The control handle returns to the normal positionby itself.Turn off the pump on the truck. Disconnect the hose.Before closing the door, clean and dry the servicepanel and check for leaks. Then, close the access door.

MANUAL FILLING

Electrical power is not available. The manual fillingprocedure must be used.To fill the water system, open the servicing panel.Connect the fill hose to the port. Turn the controlhandle counterclockwise to the FILL position and pullout on the handle.Turn on the water pump on the truck.When the tank is full, the water comes out by theoverflow port. Manually push back the control handlein its normal position. Turn off the pump on the truck. Disconnect the hose.Before closing the door, clean and dry the servicepanel and check for leaks. Then, close the access door.

TMUWATX03-T01 LEVEL 1



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POTABLE WATER SYSTEM SERVICINGTMUWATX03-P01 LEVEL 1



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TMUWATX03 LEVEL 1



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38-00-00 TOILET SYSTEM SERVICING

Contents:DRAINING

TMUWATL02 LEVEL 3



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OPERATIONThe lavatory service panel is located on the rightside of the aft fuselage.Open the service door.The controls consist of a drain port, two valve levers,a drain control handle and a filling port.To empty the waste system open the cap assembly andconnect the drain hose and next to it the fill hose.Next to the drain connection is a small lever markedOPEN. Push this lever in the direction of the arrow,the lever marked CLOSED should rotate by spring actionindicating that the valve has opened.Pull the drain control handle outward to the extendedposition. This allows waste materials to flow from thedrain port.When the system is drained return the control handleto the normal position.To flush the tank, use 5 gallons (19 l) of disinfectantcommonly called "Blue Juice".Now drain the system by extending the control handle.Once drained, return the handle to the normal position.Replenish with 2 gallons (7,5 l) of blue juice.You are now ready to disconnect hoses and replace theconnection caps on the drain and rinse ports.By closing the drain cap the drain valve automaticallycloses.

CLOSINGClean and dry the panel with a clean cloth and do notforget to close the service door.On the Forward Attendant Panel :- if the LAV indicator light is on, reservice thesystem,- if the light remains on, contact maintenance ormaintenance control.

TMUWATL02-T01 LEVEL 3



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a320_chapter_38_water_and_waste.pdf

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