Airbus

A318/A319/A320/A321
Differences to Rev.-ID: 1OCT2012

ATA 38
Author: RoU
For Training Purposes Only

LTT Release: May. 17, 2013

Water and Waste

EASA Part-66
B1/B2

A318-21_38_B12
Training Manual

For training purposes and internal use only.

Copyright by Lufthansa Technical Training (LTT).
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Lufthansa Technical Training

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Lufthansa Base Hamburg
Weg beim Jäger 193
22335 Hamburg
Germany

Tel: +49 (0)40 5070 2520

Fax: +49 (0)40 5070 4746
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Revision Identification:
 The date given in the column ”Revision” on the face of  Dates and author’s ID, which may be given at the base  The LTT production process ensures that the Training
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latest revision of that page(s) only. in the latest finalized revision.
Lufthansa Technical Training
WATER AND WASTE A318/A319/A320/A321
GENERAL
38−00

ATA 38 WATER AND WASTE

FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 ATA DOC Page 1

Lufthansa Technical Training
WATER/WASTE A318/319/320/321
GENERAL
38−00

38-00 GENERAL
INTRODUCTION
General
The water and waste system consists of:
 a potable water system
 a drain water system
 a waste water system
 and a vacuum toilet system
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 01|−00|All|SysPres|L1/B1/B2 Page 2

Lufthansa Technical Training
WATER/WASTE A318/319/320/321
GENERAL
38−00

WASTE WATER DRAIN WATER

SYSTEM SYSTEM

WATER & WASTE

SYSTEM
FOR TRAINING PURPOSES ONLY!

POTABLE WATER VACUUM TOILET

SYSTEM SYSTEM

Figure 1 System Presentation

FRA US/T-5 RrU Mar 9, 2010 01|−00|All|SysPres|L1/B1/B2 Page 3
Lufthansa Technical Training
WATER/WASTE A318/319/320/321
GENERAL
38−00

PANEL INTRODUCTION
Quantity Indication System
The LED (Light Emitting Diode) indicator on the forward attendant panel shows
the water and waste contents in percentage of volume.
To get a indication the ”IND ON” push button must be pressed.
The indication for the potable water and waste system will be on as long as the
water service panel is opened (Operated by a micro switch on the service
panel).
Potable Water Preselection System (Optional)
For the potable water system a preselection system is installed.
This system allows to preselect the desired water quantity in 25% steps.

Fault Indications
For the toilet system different fault lights (Diode) are provided.
System INOP:
 The complete vacuum toilet system is inoperative.
This will happen for example: if a fault occured, or the waste tank is full or
the toilet service panel is opened to do the toilet servicing.
LAV INOP:
 Indicates an INOP lavatory due to a fault.
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 02|All|panel|L1/B1/B2 Page 4

Lufthansa Technical Training
WATER/WASTE A318/319/320/321
GENERAL
38−00

FORWARD ATTENDANT PANEL (FAP)

ENHANCED CABIN
FLIGHT ATTENDANT PANEL (FAP) WATER/WASTE PAGE
FOR TRAINING PURPOSES ONLY!

Figure 2 Fwd Attendant Panel (A318−21)

FRA US/T-5 RrU Mar 9, 2010 02|All|panel|L1/B1/B2 Page 5
Lufthansa Technical Training
WATER/WASTE A318/319/320/321
GENERAL
38−00

A Potable Water Service Panel D Toilet Service Panel

The water service panel is located in the left−hand lower fuselage, between The service panel is located in the right−hand lower fuselage, between
FR65 and FR66. The panel has: FR65 and FR66. The panel is for the forward and aft toilets. The panel has:
− the fill/drain control handle 1 − a waste holding tank rinse connection 9
− a fill/drain port for the potable water 2 − a waste holding tank drain connection 10
− a connection for the ground−air pressure unit 3 − the door micro switch 4
− the door micro switch 4 11
− an actuation unit for the waste drain valve
− control lights for the motorized drain valves, the overflow valve and the
tank full light. 5

B Drain/Overflow Panel (A320 only)

D
The drain / overflow panel is located in the lower fuselage, between FR33
and FR34, it contains:
B
− the overflow port for the water tank 6
− the drain port for the water tank 7
− the manual control handles for the water tank drain valve and the water
tank overflow valve 8 A

C FWD Drain Panel

The forward drain panel is located in the lower fuselage, between FR28 and
FOR TRAINING PURPOSES ONLY!

FR29, it contains:
− the FWD drain outlet
− the manual control handle for the FWD drain valve 8

Figure 3 Service Drain Panels Location

FRA US/T-5 RrU Mar 9, 2010 02|All|panel|L1/B1/B2 Page 6

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WATER/WASTE A318/319/320/321
GENERAL
38−00

1 4 7
A318/319/321 ONLY

A B

8
5

DRAIN/OVERFLOW PANEL (A320 ONLY)

A320 2 6
ONLY POTABLE WATER SERVICE PANEL (1)
POTABLE WATER SERVICE PNL (2)
D
8
C
11
FOR TRAINING PURPOSES ONLY!

9 10

FWD DRAIN PANEL TOILET SERVICE PANEL

Figure 4 Service/Drain Panels
FRA US/T-5 RrU Mar 9, 2010 02|All|panel|L1/B1/B2 Page 7
Lufthansa Technical Training
WATER/WASTE A320
GENERAL
38−00

WATER/WASTE GENERAL LAYOUT

General
The water and waste system consists of a pneumatically pressurized potable
water system, a drain water system, a waste disposal system and a vacuum
toilet system.

Potable Water System

The potable water system supplies the galleys and lavatories with water from a
tank via a distribution system.
It is pressurized by bleed air system (air from ENG1; ENG2, APU).
A ground connector for external supply is also available.

Drain Water System

The drain water system gives the possibility to drain the water from the potable
water system, by means of drain valves and drain ports.
Waste Water System
The waste water system includes drainage of waste water from lavatory wash
basin and galley sinks, to be discharged overboard via heated drain lines and
heated drain masts.
Toilet System
The toilet system collects waste in a underfloor waste holding tank. The tank is
emptied and cleaned during aircraft ground service.
The toilet system uses water from the potable water system for the toilet flush.
Waste is removed from the toilet bowl by a vacuum draining system.
An electronic VSC (Vacuum System Controller) controls and monitors the
FOR TRAINING PURPOSES ONLY!

vacuum system.

FRA US/T-5 RrU Mar 9, 2010 03|A320|Basic|L1/B1/B2 Page 8

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WATER/WASTE A320
GENERAL
38−00

FWD FWD NOTE: On A320 the potable water tank is installed aft of fwd cargo compartment.
GALLEY LAVATORY
On all other types the water tank is installed aft of aft cargo compartment.

WASH
BASIN
ÈÈ
ÈÈ
TOILET

ÈÈ
ÈÈ ÈÈ CABIN FLOOR

ÈÈ ÈÈ FROM AFT TOILETS

ÈÈ
ÈÈ ÈÈ
ÈÈ TO AFT LAV.

ÈÈ ÈÈ
AND GALLEY

ÈÈ
ÈÈÈÈÈÈÈ
ÈÈ
FROM BLEED
AIR SYSTEM

ÈÈ ÍÍÍÍ
ÍÍ Í VACUUM

ÈÈ POTABLE
ÍÍ Í SYSTEM

ÈÈ WATER
Í CONTROLLER

ÈÈ Í
TANK WASTE
HOLDING

ÈÈ TANK
Í
ÈÈ
ÈÈ Í VACUUM
FOR TRAINING PURPOSES ONLY!

ÈÈ Í
GENERATOR

ÈÈ
ÈÈ Í
ÈÈ Í ÈÈ
ÈÈ Í
Í ÈÈ
ÈÈ
ÈÈ Í ÈÈ
AIRCRAFT
FWD DRAIN DRAIN/OVERFLOW POTABLE WATER TOILET SKIN
PANEL PANEL SERVICE PANEL SVCE PANEL
(A320 ONLY)
Figure 5 Water & Waste Basic Schematic (A320)
FRA US/T-5 RrU Mar 9, 2010 03|A320|Basic|L1/B1/B2 Page 9
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WATER/WASTE A320
POTABLE
38−10

38-10 POTABLE
WATER SYSTEM GENERAL DESCRIPTION (A320)
Storage
The potable water is stored in one tank installed in the pressurized underfloor
area of the right hand fuselage, aft of the forward cargo compartment.
Potable water tank capacity: 200 liters (53 US gal).

Pressurization
Pressurization of the system enables water supply from the tank to the
necessary service location.
Compressed air is trapped from the cross feed line of the engine bleed air.
When the aircraft is on ground, a compressor or ground air cart can pressurize
the potable water distribution system.

Distribution
Potable water from the water tank is supplied through a system of distribution
lines. The lavatory and galley distribution lines run below the passenger
compartment floor.
They are shrouded and insulated, and some of them are heated.
User Supply
Each lavatory can be isolated from the potable water distribution system
through a manual shut-off valve.
Heating
A water heater is installed under the wash basin inside the sanitary unit
FOR TRAINING PURPOSES ONLY!

cabinet. A thermostat allows the water temperature to be maintained between

45C (113F) and 48C (118F).
An overtemperature safety device protects the heating element.

FRA US/O-8 HeMU Jan 02, 2012 04|−10|A320|Basic|L2/B1/B2 Page 10

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WATER/WASTE A320
POTABLE
38−10

FWD FWD FORWARD

GALLEY LAVATORY ATTENDANT
PANEL (FAP)

HEATER
MANUAL
SHUT-OFF
VALVE
TO TOILET UNIT
CABIN
TO AFT FLOOR
FROM BLEED PRESSURE LAVATORIES
AIR SYSTEM REDUCING AND GALLEYS
(OR OPTIONAL FILTER VALVE
COMPRESSOR)

SHUTTLE
VALVE

TANK FULL SIGNAL

POTABLE
WATER
TANK
TANK
DRAIN
VALVE
DRAIN LIGHT
POSITION FILL FWD
FOR TRAINING PURPOSES ONLY!

SWITCH DRAIN DRAIN

VALVE VALVE
FILL OPEN
POSITION LIGHT
DRAIN OVERFLOW DRAIN SWITCH POTABLE
VALVE VALVE VALVE WATER
SERVICE
GROUND
PANEL
AIRCRAFT AIR PRESS
FWD SKIN DRAIN/OVERFLOW
FILL/DRAIN TANK FULL QUANTITY OVERFLOW DOOR LIMIT
DRAIN PANEL PANEL INDICATOR VALVE LIGHT
CONTROL HANDLE LIGHT SWITCH

Figure 6 Water System Basic Schematic (A320)

FRA US/O-8 HeMU Jan 02, 2012 04|−10|A320|Basic|L2/B1/B2 Page 11
Lufthansa Technical Training
WATER/WASTE A318/A319/321
POTABLE
38−10

WATER SYSTEM GENERAL (A318/319/321)

Storage Filling
The potable water is stored in one tank installed in the pressurized underfloor Filling is achieved through a fill / overflow and drain valve operated by the
area of the right hand fuselage, aft of the rear cargo compartment. fill/drain control handle on the potable water service panel.
Potable water tank capacity: 200 liters (53 US gal). The quantity transmitter sends a tank full-signal, via preselector control unit, to
close the fill/overflow and drain valve automatically (the tank full signal will be
Pressurization provided when the preselected quantity is reached). A manual operation is also
Pressurization of the system enables water supply from the tank to the several possible.
service location. Maximum permissible pressure to fill the potable water tank is 50 psi (3.4 bars).
The air is supplied from the engine bleed air or the Auxiliary Power Unit.
A compressor or ground air cart can also pressurize the potable water Draining
distribution system. The draining operation is achieved through the fill / overflow and drain valve
and a motorized drain valve, using the same control handle as the filling
Distribution operation.
Potable water from the water tank is supplied through a system of distribution Manual operation is possible via control handle dedicated to each valve.
lines. The lavatory and galley distribution lines run below the passenger
compartment floor. They are shrouded and insulated, and some of them are
heated.

User Supply
Each lavatory can be isolated from the potable water distribution system
through a manual shut-off valve.

Heating
A water heater is installed under the wash basin inside the sanitary unit
cabinet. A thermostat allows the water temperature to be maintained between
45C (113F) and 48C (118F).
FOR TRAINING PURPOSES ONLY!

An overtemperature safety device protects the heating element.

FRA US/O-8 HeM Jan 02, 2012 05|All|Basic|L2/B1/B2 Page 12

Lufthansa Technical Training
WATER/WASTE A318/A319/321
POTABLE
38−10

FWD FORWARD
GALLEY ATTENDANT
PANEL (FAP)

TO
TOILET
UNIT
MAUAL
HEATER SHUTOFF
VALVES
CABIN
TO AFT FLOOR
FROM BLEED PRESSURE LAVATORIES
AIR SYSTEM REDUCING AND GALLEYS
(OR OPTIONAL FILTER VALVE
COMPRESSOR)
SHUTTLE WATER QTY
VALVE TRANSMITTER

TANK FULL SIGNAL

POTABLE
WATER
TANK
FOR TRAINING PURPOSES ONLY!

FILL/OVERFLOW
DRAIN VALVE
FWD DOOR LIMIT
DRAIN GROUND LIMIT SWITCH
VALVE AIR PRESS SWs
FWD WATER FWD DRAIN VALVE POTABLE WATER
DRAIN PANEL AIRCRAFT OPEN LIGHT SERVICE PANEL
SKIN TANK
CONTROL FILL/DRAIN OVERFLOW QUANTITY
FULL
HANDLE CONTROL HANDLE FILL/DRAIN INDICATOR (OPTIONAL)
LIGHT
Figure 7 A319/321 Water System Basic Schematic (A318/319/321)
FRA US/O-8 HeM Jan 02, 2012 05|All|Basic|L2/B1/B2 Page 13
Lufthansa Technical Training
WATER/WASTE A320
POTABLE
38−10

POTABLE WATER SYSTEM FILLING PRESENTATION (A320)

Filling NORMAL
FILL
When the fill / drain control handle is turned from ”NORMAL” to ”FILL” position
and pulled out to its stop, it mechanically opens the fill/drain valve. DRAIN
The fill limit switch sends an open signal to the overflow valve.
The overflow valve control light (green) comes on when the valve is open.
The quantity transmitter sends the quantity signal to the preselector control
unit.
The preselector control unit provides a tank full signal when the preselected
quantity is reached.
This signal causes the fill/drain valve to close electrically.
The control handle is automatically pulled in and returns to the ”NORMAL”
position. When the fill/drain valve is closed, the tank full control light (green)
comes on.
The fill / drain control handle ”NORMAL” position causes the electrical closure
of the overflow valve. Figure 8 Fill Position (A320)
Fill System (without Electrical Power) 1. Handle from in flight pos (see 1) turned 45 to the left and pulled out.
You can also fill the water tank when there is no electrical power. In this position the cable assy switches on the motorized overflow valve.
To do so you must open the fill/drain valve and the overflow valve manually. 2. Fill/drain
To open the fill /drain valve you turn the control handle on the potable water Valve open.
service panel from ’NORMAL’ to ’FILL’. 3. Motorized drain valves closed (zone 133 and 138)
Then pull the control handle out to its stop. 4. After Filling the handle returns to normal position when pushed in or when
To open the overflow/ventilation valve you turn the control handle at the the fill/drain valve is electrically operated.
overflow and drain panel from ’SHUT’ to ’OPEN’.
FOR TRAINING PURPOSES ONLY!

There are no indications that the valves are open.

When the tank is full, you must close the valves manually again.

FRA US/T-5 RrU Mar 9, 2010 06|A320|Fill|L2/B1/B2 Page 14

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WATER/WASTE A320
POTABLE
38−10

INDICATION ON
M COMPRESSOR STOP
FROM/TO FWD
TANK FULL SIGNAL
ATTENDANT PANEL
PRESELECTOR
QTY CONTROL
TO LAVATORIES XMTR UNIT
AND GALLEY

VALVE OPEN FILL LIMIT

SWITCH
5MP

M FWD TANK M M M CLOSE

DRAIN DRAIN OVERFLOW FILL/DRAIN
VALVE VALVE VALVE VALVE

MANUAL MANUAL
CTL CTL
HANDLE HANDLES
FWD DRAIN PANEL DRAIN/OVER
FLOW PANEL
FOR TRAINING PURPOSES ONLY!

Figure 9 Water Fill Schematic (A320)

FRA US/T-5 RrU Mar 9, 2010 06|A320|Fill|L2/B1/B2 Page 15
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WATER/WASTE A318/319/321
POTABLE
38−10

POT. WATER SYST. FILL PRESENTATION (A318/319/321)

Filling
When the fill/drain control handle is turned from ”NORMAL” to ”FILL” position
and pulled out to its stop, it mechanically opens the fill / drain and overflow
valve.
The quantity transmitter sends the quantity signal to the preselector control
unit.
The preselector control unit provides a tank full signal when the preselected
quantity is reached.
This signal causes the fill/overflow and drain valve to close electrically.
The control handle is automatically pulled in and returns to the ”NORMAL”
position. The tank full control light (green) comes on.
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 07|All|Fill|L2/B1/B2 Page 16

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WATER/WASTE A318/319/321
POTABLE
38−10

M COMPRESSOR STOP
FROM/TO FWD TO LAVATORIES TANK FULL SIGNAL
ATTENDANT PANEL AND GALLEY
QTY PRESELECTOR
XMTR CONTROL
UNIT
(OPTIONAL)

M M CLOSE
FWD DRAIN VALVE FILL/DRAIN & OVERFLOW
VALVE

MANUAL
CTL
HANDLE
FWD DRAIN
PANEL

FWD DRAIN
VALVE LT
FOR TRAINING PURPOSES ONLY!

(OPTIONAL)

FILL DRAIN

TANK
FULL LT

Figure 10 Schematic Water Fill (A318/319/321)

FRA US/T-5 RrU Mar 9, 2010 07|All|Fill|L2/B1/B2 Page 17
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WATER/WASTE A320
POTABLE
38−10

POTABLE WATER SYSTEM DRAIN PRESENTATION (A320)

Draining NORMAL
FILL
When the fill/drain control handle is turned to ”DRAIN” and pulled out, it
mechanically opens the fill / drain valve. The drain limit switch sends open DRAIN
signals to the overflow valve and the drain valves.
The control lights (green) on the service panel come on when the associated
valves are opened (fwd drain valve, tank drain valve and overflow valve).
When the system has been drained, the fill / drain control handle must be
manually set back to ” NORMAL” this closes the fill / drain valve.
The fill/drain control handle ”NORMAL” position causes the electrical closure of
the overflow, tank and forward drain valve.
If electrical power is not available, you can open the valves manually with
handles installed on the potable water service and the drain panels. The
handles are marked ”SHUT / OPEN”.
Figure 11 Drain Position

1. Handle from in flight pos (see 1) turned 45 to the right and pulled out.
In this position the cable assy switches on the motorized drain valves in
zones 133 and 138 and the overflow valve in zone 138
2. Fill/drain
Valve open
3. Motorized drain valves open (zone 133 and 138)
4. Motorized overflow valve open (zone 138)
5. After draining the handle returns to normal position when pushed in
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 08|A320|Drain|L2/B1/B2 Page 18

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WATER/WASTE A320
POTABLE
38−10

INDICATION ON
M COMPRESSOR STOP
FROM/TO FWD
ATTENDANT TANK FULL SIGNAL
PANEL PRESELECTOR
QTY CONTROL
TO LAVATORIES UNIT
XMTR
AND GALLEY
DRAIN LIMIT SWITCH 3MP
FROM FWD LAVATORY
AND GALLEY

VALVES OPEN
FWD
M DRAIN TANK M M
M
VALVE DRAIN OVERFLOW FILL/DRAIN
VALVE VALVE VALVE

MANUAL CTL MANUAL CTL

HANDLE HANDLES

FWD DRAIN DRAIN/OVER

PANEL FLOW PANEL

FWD DRAIN
VALVE LT
TANK
FOR TRAINING PURPOSES ONLY!

FULL LT
FILL DRAIN

TANK DRAIN
VALVE LT

OVERFLOW
VALVE LT

POTABLE WATER SERVICE PANEL

Figure 12 Water Drain Schematic (A320)
FRA US/T-5 RrU Mar 9, 2010 08|A320|Drain|L2/B1/B2 Page 19
Lufthansa Technical Training
WATER/WASTE A318/319/321
POTABLE
38−10

POT. WATER SYST. DRAIN PRESENTATION (A319/A321)

Draining When the system has been drained, the fill / drain control handle must be
When the fill/drain control handle is turned and pulled to ”DRAIN”, it manually set back to ”NORMAL” position.
mechanically opens the fill/drain and overflow valve. The drain limit switch The fill/drain control handle ”NORMAL” position causes the electrical closure of
sends an open signal to the forward drain valve. the forward drain valve.
The control light (green) on the service panel comes on when the forward drain If electrical power is not available, you can open the forward drain valve
valves is in open position. manually with a handle installed on the forward drain panel. The handle is
marked ”SHUT/OPEN”.

CONFIGURATION
EXPOSURE WATERTANK PURGE OF
HEATING OUTSIDE DEPRESSURIZATION
AIR CABIN TIME IN DRAIN SYSTEM
WATER/ AIR REQUIRED
CONDITIONING TEMPERATURE (HOURS:MIN REQUIRED REQUIRED
WASTE SYS TEMPERATURE
BETWEEN
ABOVE 10° C
ON/OFF 0 AND -15° C ANY NO
(50°C)
ON (32 AND 5° F)
ABOVE 10° C
ON BELOW -15°C (5°F) 1:15
(50°C)
BETWEEN
NO NO
0 AND -7° C 1:30
(32 AND 19.4° F)
OFF ON BETWEEN
-7 AND -15° C 0:30
(19.4 AND 5° F)
BELOW -15°C (5°F) ANY YES
FOR TRAINING PURPOSES ONLY!

BETWEEN
0 AND -7° C 1:30
(32 AND 19.4° F)
OFF OFF BETWEEN YES YES
-7 AND -15° C 0:30
(19.4 AND 5° F)
BELOW -15°C (5°F) ANY

FRA US/T-5 RrU Mar 9, 2010 09|All|Drain|L2/B1/B2 Page 20

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WATER/WASTE A318/319/321
POTABLE
38−10

M COMPRESSOR STOP
TO LAVATORIES
FROM/TO FWD AND GALLEY
ATTENDANT PANEL TANK FULL SIGNAL

FROM FWD LAVATORY QTY PRESELECTOR CONTROL

AND GALLEY XMTR UNIT (OPTIONAL)

DRAIN LIMIT SWITCH 3MP

M M

FWD DRAIN VALVE FILL/DRAIN & OVERFLOW

VALVE

MANUAL CTL
HANDLE
FWD DRAIN PANEL

50%

FWD DRAIN 25% 75%

(OPTIONAL)
FOR TRAINING PURPOSES ONLY!

VALVE LT 0% 100%
QTY

FILL DRAIN

TANK
FULL LT

POTABLE WATER SERVICE PANEL

Figure 13 Water Drain Schematic (A318/319/321)
FRA US/T-5 RrU Mar 9, 2010 09|All|Drain|L2/B1/B2 Page 21
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WATER/WASTE A320
WATER DRAINING (DUMP)
38−14

38−14 WATER DRAINING SYSTEM

POTABLE WATER DRAIN SYSTEM DESCRIPTION (A320)
General
The drain system gives the possibility to drain the water from the potable water
system.

Operation
Turn the control handle to DRAIN and pull it out to the stop. This opens the
fill/drain valve 16MA and closes the limit switch 3MP.
The motorized overflow valve 8MP and the motorized drain valves 4MP and
14MP are energized and move to the open position.
On the potable water service panel 2023VU, the drain valve control lights 2MP
and 12MP and the overflow valve control light 6MP come on.
When the system has drained, you push and turn the control handle to the
NORMAL position.
The limit switch 3MP opens, the three valves close and the control lights go off.
If electric power is not available, you can open the valves manually with the
handles installed on the potable water service and the drain panels.
The handles are marked SHUT/OPEN.
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 10|−14|A320|Drain|L2/B1/B2 Page 22

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WATER/WASTE A320
WATER DRAINING (DUMP)
38−14
−
FROM AFT
FR65
FR66

POTABLE WATER TANK

Z170 3000MM

LIMIT
SWITCH LAVATORY
3MP TO GALLEY
TANK SYSTEM
MOTORIZED DRAIN FR34
VALVE 4MP

OVERFLOW VALVE
8MP DRAIN VALVE
14MP
FILL/DRAIN
VALVE

BELLY FAIRING
2023VU
TANK
OVERFLOW DRAIN VALVE
FOR TRAINING PURPOSES ONLY!

POTABLE
(PORT) (CONTROL LIGHT) 2MP WATER
FILL/DRAIN
TANK TANK (CONTROL
DRAIN DRAIN TANK DRAIN HANDLE)
(PORTS) (CONTROL LIGHT) 12MP
FWD DRAIN PANEL
OVERFLOW VALVE FILL/DRAIN
133AL (CONTROL LIGHT) 6MP (PORT)
192NB
FR28
DRAIN/OVERFLOW PANEL POTABLE WATER SERVICE PANEL

Figure 14 Water Draining Component Location (A320)

FRA US/T-5 RrU Mar 9, 2010 10|−14|A320|Drain|L2/B1/B2 Page 23
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WATER/WASTE A320
WATER DRAINING (DUMP)
38−14

WATER DRAINING −ELECTRICAL OPERATION (A320)

Description
Three drain valves and drain ports are installed in the potable water system.
The drain valve 14MP drains the potable water tank and the center section of
the potable−water distribution system.
The motorized drain valve 4MP drains the system’s front section.
The motorized fill/drain valve 16MA drains the system’s rear section.
The fill/drain control handle 3254MM which is located on the potable water
service panel 2023VU opens the fill/drain valve 16MA. The limit switch 3MP is
energized to operate the related overflow and drain valves.
The overflow valve 8MP opens to let air into the potable water tank.
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 11|A320|Drain|L3/B1 Page 24

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WATER/WASTE A320
WATER DRAINING (DUMP)
38−14

4MP DRAIN VALVE 14MP DRAIN VALVE 8MP DRAIN VALVE

CLOSED POSITION CLOSED POSITION CLOSED POSITION

M M M

CLOSE

CLOSE

CLOSE
OPEN
OPEN

OPEN
Î Î Î
Î Î Î
7118VT
2001VU

5MP FILL
STA3366/FR70
4MP 8MP 2023VU POSITION
14MP 2021VU SW
G G G

1MP 6MP 2021VU

2MP DRAIN DRAIN OVERFLOW SERVICE
VALVE VALVE VALVE PANEL
2023VU
SERVICE
PANEL
FOR TRAINING PURPOSES ONLY!

7MP
DRAIN
LIMIT
RELAY
1MP
602PP
3MP
28VDC
DRAIN
GND/FLT 5A LIMIT
2001VU SWITCH

7510VT

Figure 15 Water Draining−Electrical Schematic (A320)

FRA US/T-5 RrU Mar 9, 2010 11|A320|Drain|L3/B1 Page 25
Lufthansa Technical Training
WATER/WASTE A318/319/321
WATER DRAINING (DUMP)
38−14

POT. WATER DRAIN SYST. DESCRIPTION (A318/319/321)

General
The drain system gives the possibility to drain the water from the potable water
system.

Operation
When you set the control handle to ’DRAIN’ and pull it out to its stop, the
fill/overflow drain valve opens. This procedure also closes the limit switch 3MP
which energizes and moves the motorized drain valve 4MP to the open
position.
The drain valve control−light 2MP, which is located on the potable water
service panel 2023VU, comes on when the motorized drain valve 4MP opens.
The two valves close when the system has drained and the control handle is
pushed in and set to ’NORMAL’. The drain valve control−light will also go off.
You can open the motorized drain valve manually, if electrical supply is not
available.
A handle, which is located on the drain panel, opens the valve when you move
it from SHUT to DRAIN.
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 12|All|Drain|L2/B1/B2 Page 26

Lufthansa Technical Training
WATER/WASTE A318/319/321
WATER DRAINING (DUMP)
38−14

POTABLE WATER TANK

Z170
2023VU SERVICE PANEL

(2MP) DRAIN VALVE

Z130 CONTROL LIGHT
FILL/DRAIN CONTROL
QUANTITY HANDLE
INDICATOR OVERFLOW/DRAIN PORT
AND DOOR
MICROSWITCH FILL/DRAIN PORT

FILL/OVERFLOW
DRAIN VALVE
8MA LIMIT
FR29 SWITCH
MOTORIZED (3MP)
DRAIN VALVE 4MP

DRAIN PORT
FOR TRAINING PURPOSES ONLY!

DRAIN CONTROL
HANDLE

FR28

FROM FWD GALLEY DRAIN PORT

FR29
AND LAVATORY SYSTEM

133AL
Figure 16 Water Draining Component Location (A318/319/321)
FRA US/T-5 RrU Mar 9, 2010 12|All|Drain|L2/B1/B2 Page 27
Lufthansa Technical Training
WATER/WASTE A318/319/321
WATER DRAINING (DUMP)
38−14

WATER DRAIN−ELECTRICAL OPERATION (A318/319/321)

Description
Two drain valves and two drain ports are installed in the potable water system.
The fill/overflow drain valve 8MA drains the rear section of the potable−water
distribution system.
The motorized drain valve 4MP drains the system’s front section.
The fill/drain control handle which is located on the potable water service panel
2023VU opens the two drain valves at the same time.
You can drain the potable water system fully through the two drain ports.
FOR TRAINING PURPOSES ONLY!

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WATER/WASTE A318/319/321
WATER DRAINING (DUMP)
38−14

CLOSED
M

OPEN

4MP MOTORIZED DRAIN

VALVE SELECTED TO CLOSE

1MP

5A

602PP
DC GROUND/
FLIGHT
2001VU
FOR TRAINING PURPOSES ONLY!

M
2001VU
2MP
DRAIN VALVE 3MP
CONTROL LIGHT LIMIT SWITCH
MANUALLY
CONTROLLED
2023VU FR70
4MP 2021VU 2023VU SERVICE PANEL

Figure 17 Water Draining−Electrical Schematic (A318/319/321)

FRA US/T-5 RrU Mar 9, 2010 13|All|Drain|L3/B1 Page 29
Lufthansa Technical Training
WATER/WASTE A320
POTABLE
38−10

38−10 POTABLE
POTABLE WATER SYSTEM OPERATION (A320)
Storage Filling
The potable water is stored in one tank installed in the pressurized underfloor Filling is achieved through a fill / drain valve operated by the fill/drain control
area of the right hand fuselage, aft of the forward cargo compartment. handle on the potable water service panel.
Potable water tank capacity: 200 liters (53 US gal). The fill / drain control handle simultaneously opens the electrically motorized
overflow valve for venting.
Pressurization
The quantity transmitter sends a tank full-signal, via preselector control unit, to
Pressurization of the system enables water supply from the tank to the close the fill/drain valve automatically (the tank full signal will be provided when
necessary service location. the preselected quantity is reached).
Compressed air is trapped from the cross feed line of the engine bleed air. Manual operation is possible via control handles dedicated to each valve.
When the aircraft is on ground, a compressor or ground air cart can pressurize Maximum permissible pressure to fill the potable water tank is 50 psi (3.4 c
the potable water distribution system. bars).
Distribution Draining
Potable water from the water tank is supplied through a system of distribution The draining operation is achieved through the fill/drain valve and two
lines. The lavatory and galley distribution lines run below the passenger motorized drain valves using the same control handle as the filling operation. In
compartment floor. They are shrouded and insulated, and some of them are this case, the overflow valve is also controlled to open.
heated.
Manual operation is possible via control handles dedicated to each valve.
User Supply
Each lavatory can be isolated from the potable water distribution system
through a manual shut-off valve.

Heating
A water heater is installed under the wash basin inside the sanitary unit
FOR TRAINING PURPOSES ONLY!

cabinet. A thermostat allows the water temperature to be maintained between

45C (113F) and 48C (118F).
An overtemperature safety device protects the heating element.

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Lufthansa Technical Training
WATER/WASTE A320
POTABLE
38−10

FWD ATTENDANT PANEL

TO AFT
LAVATORIES
FROM 2000 VU
AND GALLEY
CABIN FLOOR
TO FWD LAVATORY PRESSURE
AND GALLEY TO FULL INDICATOR ON FROM BLEED
AIR SYST. REGULATOR
7 MA WATER SERVICE PANEL
AND TO FILL/DRAIN VALVE M

COMPRESSOR

TO FWD ATT.
LEGEND: PANEL

ELECTRIC WIRING PORTABLE WATER TANK

POTABLE
PORTABLE WATER LINE 3000 MM

AIR LINE
INSULATED AND HEATED
FROM
INSULATED 7 MA
SHROUDED WATER LINE

OVER-
FOR TRAINING PURPOSES ONLY!

M M M
FLOW DRAIN VALVE FILL/DRAIN
DRAIN VALVE 4 MP
M VALVE 14 MP VALVE 16 MA
8 MP

DRAIN / OVERFLOW
FWD DRAIN PANEL PANEL 192 NB W.S.P. 171 AL

GRD AIR PRESS.

DRAIN OVERFLOW DRAIN FILL/DRAIN
DRAIN POS SW 3 MP VALVE POS.
CABLE CABLE CONTROL FULL INDICATOR
CONTROL FILL POS SW 5 MP VALVE POS.

Figure 18 Potable Water System Basic Schematic (A320)

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WATER/WASTE A318/319/321
POTABLE
38−10

POTABLE WATER SYSTEM OPERATION (A318/319/321)

Storage Filling
The potable water is stored in one tank installed in the pressurized underfloor Filling is achieved through a fill/overflow and drain valve operated by the
area of the right hand fuselage, aft of the rear cargo compartment. fill/drain control handle on the potable water service panel.
Potable water tank capacity: 200 liters (53 US gal). The quantity transmitter sends a tank full-signal, via preselector control unit, to
close the fill/overflow and drain valve automatically (the tank full signal will be
Pressurization provided when the preselected quantity is reached). A manual operation is also
Pressurization of the system enables water supply from the tank to the several possible.
service location. Maximum permissible pressure to fill the potable water tank is 50 psi (3.4 bars).
The air is supplied from the engine bleed air or the Auxiliary Power Unit.
Draining
A compressor or ground air cart can also pressurize the potable water
distribution system. The draining operation is achieved through the fill / overflow and drain valve
and a motorized drain valve, using the same control handle as the filling
Distribution operation.
Potable water from the water tank is supplied through a system of distribution Manual operation is possible via control handle dedicated to each valve.
lines. The lavatory and galley distribution lines run below the passenger
compartment floor. They are shrouded and insulated, and some of them are
heated.
User Supply
Each lavatory can be isolated from the potable water distribution system
through a manual shut-off valve.
Heating
A water heater is installed under the wash basin inside the sanitary unit
cabinet. A thermostat allows the water temperature to be maintained between
45C (113F) and 48C (118F).
FOR TRAINING PURPOSES ONLY!

An overtemperature safety device protects the heating element.

FRA US/T-5 RrU Mar 9, 2010 15|All|L3/B1 Page 32

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WATER/WASTE A318/319/321
POTABLE
38−10

FWD ATTENDANT PANEL

FROM 2000 VU

CABIN FLOOR
TO FWD LAVATORY PRESSURE FROM
AND GALLEY TO FULL INDICATOR ON BLEED AIR SYST. TO AFT
WATER SERVICE PANEL LAVATORIES
7 MA AND TO FILL/DRAIN VALVE REGULATOR COMPRESSOR AND GALLEY
(A321 ONLY)
M

TO FWD ATT.
POTABLE WATER PANEL
LEGEND: TANK 3000 MM
ELECTRIC WIRING
PORTABLE WATER LINE
AIR LINE FROM
INSULATED AND HEATED 7 MA
FROM QTY
INSULATED XMTR
SHROUDED WATER LINE

FILL/OVERFLOW M
FOR TRAINING PURPOSES ONLY!

DRAIN VALVE 16 MA INDICATOR

DRAIN VALVE 4 MP
M (A319 ONLY)

FWD DRAIN PANEL WATER SERVICE PANEL 2023 VU

GRD AIR PRESS.

DRAIN OVERFLOW FULL
INDICATOR
CABLE FILL / DRAIN VALVE POS.
CONTROL CABLE CONTROL DRAIN POS. SWITCH 3MP

Figure 19 Potable Water System Basic Schematic (A318/319/321)

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WATER/WASTE A320
WATER STORAGE
38−11

38-11 WATER STORAGE

WATER STORAGE FUNCTIONAL OPERATION (A320)
Water Tank 3000MM
The potable water tank is installed in the pressurized underfloor area RH
behind the forward cargo compartment. It is made of GFRP (Glassfiber
Reinforced Plastic). It is strengthened to accept the rated pressure for the
potable water system of between 22 and 25 psi (1.5 and 1.72 bar). The tank
has a capacity of 200l (53 USgal).
The tank is assembled with:
 an overflow port,
 an installation port for the water−contents quantity transmitter 3MA,
 a connection for fill/drain/distribution plumbing,
 a connection for air pressurization plumbing.
FOR TRAINING PURPOSES ONLY!

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Lufthansa Technical Training
WATER/WASTE A320
WATER STORAGE
38−11

WATER CONTENTS
QUANTITY TRANSMITTER 3MA

Z138

AIR PRESSURE LINE

POTABLE WATER
TANK 3000MM

STA1590/FR36
FILL/DISTRIBUTION
LINE
OVERFLOW
VENTILATION
FOR TRAINING PURPOSES ONLY!

VALVE 8MP

DRAIN LINE
DRAIN VALVE
14MP

STA1483/FR34

Figure 20 Potable Water Tank (A320)

FRA US/T-5 RrU Mar 9, 2010 16|−11|A320|Comp|L3/B1 Page 35
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WATER/WASTE A318/319/321
COMPONENTS
38−11

WATER STORAGE FUNCTIONAL OPERATION (A318/319/321)

Water Tank 3000MM
The potable water tank is made of CFRP (Carbonfiber Reinforced Plastic).
It is strengthened to accept the rated pressure for the potable water system.
The capacity of the tank is 200l (53 USgal). The tank is attached to the aircraft
structure with clamps.
The tank has:
 an overflow port,
 an installation port for the fill/overflow drain valve and for draining,
 an installation port for the water−contents quantity transmitter 3MH,
 a connection for air pressurization system with an air−no−water valve.

Fill/Overflow Drain Valve 8MA

The fill/overflow drain valve is installed between the water service panel and
the potable water tank. Tube assemblies connect the valve to the tank and to
the ports on the potable water service panel. The “fill“ function of the valve also
operates as a system “drain“ facility. You can manually select the fill and drain
facilities on the service panel.
The overflow function operates as an overflow outlet and a vent for the tank.
The operation of the fill/overflow drain handle opens the overflow port when it
is selected to the “FILL“ or “DRAIN“ position and the handle pulled out.
FOR TRAINING PURPOSES ONLY!

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WATER/WASTE A318/319/321
COMPONENTS
38−11

WATER CONTENT
QANTITY TRANSMITTER 3MH

WATER TANK 3000MM

Z171

FR68
OVERFLOW
OVERFLOW
FILL/OVERFlOW
FILL/DRAIN DRAIN VALVE 8HA

PORTABLE WATER FR65

SERVICE PANEL
FOR TRAINING PURPOSES ONLY!

OVERFLOW

FILL/DRAIN

CONTROL CABLE

Figure 21 Potable Water Tank A318/319/321

FRA US/T-5 RrU Mar 9, 2010 17|All|Comp|L3/B1 Page 37
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WATER/WASTE A318/319/320/321
AIR SUPPLY SYSTEM
38−41

38−41 AIR SUPPLY SYSTEM

WATER TANK PRESSURIZATION INTRODUCTION (ALL)
General
Air pressure is used to pressurize the potable water system.
The air is supplied from:
 the engine bleed air or
 the APU (Auxiliary Power Unit) or
 the ground pressure connection.
An additional air supply source to pressurize the potable water system is the air
supply boost−system (Ref. AMM 38−42−00).
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 01|−41|All|Air Sply|L1/B1/B2 Page 38

Lufthansa Technical Training
WATER/WASTE A318/319/320/321
AIR SUPPLY SYSTEM
38−41

FROM GROUND
AIR SUPPLY

POTABLE WATER TANK

3000MM
FOR TRAINING PURPOSES ONLY!

AIR FROM
CROSSFEED DUCT

Figure 22 Air Supply System (All)

FRA US/T-5 RrU Mar 9, 2010 01|−41|All|Air Sply|L1/B1/B2 Page 39
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WATER/WASTE A320
AIR SUPPLY SYSTEM
38−41

COMPRESSED AIR LINE DESCRIPTION (A320)

General
The compressed air line is composed of:
 A shuttle valve that directs the pressurized air. The system is supplied from
the bleed air crossfeed−line or from the ground pressure connection.
 A check valve that lets compressed air flow only in the direction of the water
tank (If a decrease in pressure of the supply source occurs).
 A pressure reducing and relief valve that reduces the compressed air
pressure to the system working pressure (If the pressure is too high, the
valve releases it).
 A ground pressure connection to pressurize the water system when the
engines or the APU do not operate.

Operation and Description

The compressed air (Irrespective of the source which supplies it) flows from the
shuttle valve to the potable water tank. It flows through the air filter, the check
valve and the pressure reducing/relief valve to the potable water tank.
The air filter removes all unwanted materials from the compressed air.
The check valve is installed between the pressure reducing/relief valve and the
air filter. It lets the compressed air flow in the direction of the water tank only.
The pressure reducing/relief valve reduces the air pressure from between
2.83bar (41.0456psi) and 3.24bar (46.9922psi) to the system working pressure
1.52bar (22.0457psi) to 1.73bar (25.0915psi).
The pressure relief section of the valve will operate and release the air out of
the system if the pressure increases to a pressure of 2.21bar (32.0533psi) to
2.48bar (35.9693psi).
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 02|A320|Air Sply|L2/B1/B2 Page 40

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WATER/WASTE A320
AIR SUPPLY SYSTEM
38−41

Z130
FROM GROUND
AIR SUPPLY

FR36

FR35
POTABLE WATER TANK
3000MM

AIR FROM
CROSSFEED DUCT

PRESSURE REDUCING
AND RELIEF VALVE
FOR TRAINING PURPOSES ONLY!

4200MM

CHECK VALVE
4205MM

AIR FILTER
4210MM

SHUTTLE VALVE
4215MM
Figure 23 Air Supply System (A320)
FRA US/T-5 RrU Mar 9, 2010 02|A320|Air Sply|L2/B1/B2 Page 41
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WATER/WASTE A318/319/321
AIR SUPPLY SYSTEM
38−41

COMPRESSED AIR LINE DESCRIPTION (A318/319A321)

POTABLE WATER TANK
General
In the compressed air line there is:
 A shuttle valve that directs the pressurized air. The system is supplied from
the bleed air crossfeed−line or from the ground pressure connection.
 A check valve that lets compressed air flow only in the direction of the water
tank (If a decrease in pressure of the supply source occurs).
 A pressure reducing and relief valve that reduces the compressed air
pressure to the system working pressure (If the pressure is too high, the
valve releases it).
On the potable water−service panel there is:
 A ground pressure connection to pressurize the water system when the
engines or the APU do not operate. FR66
Operation and Description
The compressed air (irrespective of the source which supplies it) flows from the Z170
shuttle valve to the potable water tank. It flows through the air filter, the check
valve and the pressure reducing/relief valve to the potable water tank. The air FR65
filter removes all unwanted materials which are in the compressed air.
The check valve is installed between the pressure reducing/relief valve and the
air filter. It lets the compressed air flow in the direction of the water tank only.
An air no water valve is install in the potable water tank. it is located at the end
of the compressed air line to garantee that no water comes in the compressed
air system.
The pressure reducing/relief valve reduces the air pressure from between
2.83bar (41.0456psi) and 3.24bar (46.9922psi) to the system working pressure
FOR TRAINING PURPOSES ONLY!

1.52bar (22.0457psi) to 1.73bar (25.0915psi).

The pressure relief section of the valve will operate and release the air out of
the system if the pressure increases to a pressure of 2.21bar (32.0533psi) to
2.48bar (35.9693psi).

Figure 24 Potable Water Tank Location (A318/319/321)

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WATER/WASTE A318/319/321
AIR SUPPLY SYSTEM
38−41

POTABLE WATER
TANK 3000MM

SHUTTLE
VALVE
4215MM

AIR
FILTER
4210 MM

CHECK
VALVE
4205MM
GROUND AIR
PRESSURE

GROUND SERVICE
PANEL 2023VU
FOR TRAINING PURPOSES ONLY!

PRESSURE
REDUCING AND
RELIEF VALVE
4200MM

BLEED AIR PRESSURE

Figure 25 Air Supply System (A318/319/321)

FRA US/T-5 RrU Mar 9, 2010 03|Air Sply|All|L2/B1/B2 Page 43
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WATER/WASTE A318/319/A320/321
AIR SUPPLY BOOST SYSTEM
38−42

38−42 AIR SUPPLY BOOST SYSTEM

INTRODUCTION (ALL)
General
The air supply boost−system gives pressure to the potable water system if no
bleed air pressure is available. It makes sure that the potable water system
works at the correct pressure.
The compressor of this system is installed near the water tank. The system
operates independently from the bleed air system of the aircraft and the
ground−air pressure supply.
FOR TRAINING PURPOSES ONLY!

FRA US/T-5 RrU Mar 9, 2010 04|−42|All|Air Boost|L1/B1/B2 Page 44

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WATER/WASTE A318/319/A320/321
AIR SUPPLY BOOST SYSTEM
38−42

FROM BLEED
AIR SYSTEM

ÇÇÇ
ÇÇÇÇ ÇÇ ÇÇÇÇ PRESSURE REDUCING
AND RELIEF VALVE

ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ ÈÈ
COMPRESSOR
AIR INTAKE

ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ ÈÈ M

ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
GROUND AIR SUPPLY
FROM WATER SERVICE PANEL
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ AIR COMPRESSOR
FOR TRAINING PURPOSES ONLY!

POTABLE WATERTANK

Figure 26 Air Supply Boost System (All)

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WATER/WASTE A320
AIR SUPPLY BOOST SYSTEM
38−42

AIR SUPPLY BOOST SYSTEM DESCRIPTION (A320)

GENERAL
Check Valve 4206MM
The air supply boost−system gives pressure to the potable water system if no
bleed air pressure is available. It makes sure that the potable water system The check valve makes sure that the compressed air flows only in the direction
works at the correct pressure. The compressor of this system is installed of the potable water tank.
between FR35 and FR36, aft of the FWD cargo compartment.
The air supply boost−system supplies compressed air to the potable water tank Limit switch 5MA
3000MM. This system has a compressor 8MD, a pressure switch 10MD, a The limit switch 5MA at the service panel 171AL is connected between the
check valve 4206MM and two air filters. One air filter 4211MM is directly 28V DC GND/FLIGHT BUS and the pressure switch 10MD. When the service
connected to the inlet of the compressor and the other 4212MM on the outlet. panel 171AL is open, the relay 9MD is de−energized and stops the electric
The check valve 4206MM is installed downstream of the air filter 4212MM. This motor of the compressor 8MD.
makes sure that the pressure flows only in the direction of the potable water
tank. The pressure switch 10MD, installed between the check valve and the
potable water tank, switches the compressor on and off.

Compressor 8MD
The air compressor 8MD is a double−bellows reciprocating pump that is
electrically driven.

Pressure Switch 10MD

The pressure switch 10MD senses the pressure in the potable water tank and
switches the electric motor (of the compressor) on and off.

Relay 9MD
The relay 9MD is installed below the aircraft floor at FR 65. It is a 28 V DC
FOR TRAINING PURPOSES ONLY!

operated switch that connects and disconnects the 115 V AC BUS 2 to the
electric motor. The 28 V DC electrical power that operates the relay is supplied
from the GND/FLIGHT BUS. This is supplied through the limit switch 5MA of
the maintenance door and the pressure switch 10MD.

Air Filters 4211MM/4212MM

The air filters stop the ingress of impurities into the system from the air around
the compressor.

FRA US/T-5 RrU Mar 9, 2010 05|A320|Air Boost|L2/B1/B2 Page 46

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WATER/WASTE A320
AIR SUPPLY BOOST SYSTEM
38−42

TO C/B PANEL
2000 VU
PASSENGER FLOOR
COMPARTMENT
FROM BLEED

ÉÉÄÄ
4206 MM CHECK VALVE TO AFT LAVATORY (IES)
AIR SYSTEM
AND GALLEY

7 MA
ÄÄ AIR FILTER

ÄÄ ÄÄ
4212 MM
PRESSURE

ÄÄ ÄÄ
REDUCING & 4211 MM
TO FWD LAVATORY

ÄÄ
AND GALLEY RELIEF
VALVE M
COMPRESSOR
8MD

10 MD
PRESSURE
SWITCH
POTABLE WATER
TANK 3000 MD
FOR TRAINING PURPOSES ONLY!

RELAY 9MD

M M M
DRAIN/
OVERFLOW LIMIT SWITCH
PANEL 192 NB
SERVICE PANEL 171 AL

Figure 27 Air Supply Boost System (A320)

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WATER/WASTE A320
AIR SUPPLY BOOST SYSTEM
38−42

COMPONENT PRESENTATION (A320)

Air Compressor 8MD Air Filters 4211MM/4212MM
The air compressor 8MD is a double−bellows reciprocating pump that is The air filters stop the ingress of impurities into the system from the air around
electrically driven. the compressor.
It has:
The Check Valve 4206MM.
 an electric motor,
The check valve makes sure that the compressed air flows only in the direction
 a housing, of the potable water tank.
 a crankshaft,
 bearings,
 inlet and outlet valves,
 two drive rods,
 two bellows (which function as a double−piston air compressor unit).
The electric motor is fan cooled and has its own housing. This is bolted to, and
hermetically sealed from, the housing of the compressor. The motor operates
at 3600 rpm when it is supplied with 115V AC 400Hz from the 3−phases of the
AC BUS 2. A thermal−overload protection circuit stops the motor if it overheats.
This same protection circuit starts the motor again when it has cooled down.
The bellows are made of stainless steel. They are contoured diaphragms,
welded on alternate inside and outside diameters, in a series of convolutions.
This design gives maximum stroke with minimum stress. At maximum stroke
the bellows fully−nest (In the compressed position) to give high compression
ratios. The bellows are hermetically sealed to isolate the air−stream from the
drive section of the motor and all outside contaminants. The drive rods connect
the bellows to the crankshaft.
Pressure Switch 10MD
FOR TRAINING PURPOSES ONLY!

The pressure switch 10MD senses the pressure in the potable water tank and
switches the electric motor (Of the compressor) on and off.
At 25psi (1.7236 bar) the pressure switch disconnects the 28V DC line from the
relay. This stops the electric motor. When the pressure in the potable water
tank is 22psi (1.5168 bar) the pressure switch connects the 28V DC line.
This causes the relay to start the electric motor of the compressor to pressurize
the system.

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Lufthansa Technical Training
WATER/WASTE A320
AIR SUPPLY BOOST SYSTEM
38−42

Z137
Z138
FR36
FR35

10MD
PRESSURE
SWITCH
FOR TRAINING PURPOSES ONLY!

COMPRESSOR
CHECK VALVE
4206M 8MD
AIR FILTER
4211MM

AIR FILTER
4212MM

Figure 28 Air Supply Boost System Components (A320)

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WATER/WASTE A318/319/321
AIR SUPPLY BOOST SYSTEM
38−42

38−42 AIR SUPPLY BOOST SYSTEM

AIR SUPPLY BOOST SYSTEM DESCRIPTION (A318/319/321)
GENERAL
Check Valve 4206MM
The air supply boost−system gives pressure to the potable water system if no
bleed air pressure is available. It makes sure that the potable water system The check valve makes sure that the compressed air flows only in the direction
works at the correct pressure. The compressor of this system is installed of the potable water tank.
between FR65 and FR66 in the rear of the AFT cargo compartment.
The air supply boost−system supplies compressed air to the potable water tank Limit switch 5MA
3000MM. This system has a compressor 8MD, a pressure switch 10MD, a The limit switch 5MA at the service panel 171AL is connected between the
check valve 4206MM and two air filters. One air filter 4211MM is directly 28V DC GND/FLIGHT BUS and the pressure switch 10MD. When the service
connected to the inlet of the compressor and the other 4212MM on the outlet. panel 171AL is open, the relay 9MD is de−energized and stops the electric
The check valve 4206MM is installed downstream of the air filter 4212MM. motor of the compressor 8MD.
This makes sure that the pressure flows only in the direction of the potable
water tank. The pressure switch 10MD, installed between the check valve and
the potable water tank, switches the compressor on and off.

Compressor 8MD
The compressor is a reciprocating piston type which is electrically driven.

Pressure Switch 10MD

The pressure switch 10MD senses the pressure in the potable water tank and
switches the electric motor (Of the compressor) on and off.

Relay 9MD
FOR TRAINING PURPOSES ONLY!

The relay 9MD is installed below the aircraft floor at FR 65. It is a 28V DC
operated switch that connects and disconnects the 115V AC BUS 2 to the
electric motor. The 28V DC electrical power that operates the relay is supplied
from the GND/FLIGHT BUS. This is supplied through the limit switch 5MA of
the maintenance door and the pressure switch 10MD.

Air Filters 4211MM/4212MM

The air filters stop the ingress of impurities into the system from the air around
the compressor.

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WATER/WASTE A318/319/321
AIR SUPPLY BOOST SYSTEM
38−42

TO FWD ATT
PANEL PASSENGER FLOOR
COMPARTMENT
FROM BLEED

ÏÏÕÕ
4206 MM CHECK VALVE TO AFT LAVATORY (IES)
AIR SYSTEM
AND GALLEY

ÕÕ AIR FILTER

ÕÕ
4212 MM
PRESSURE
TO FWD LAVATORY REDUCING &
ÕÕ AIR INLET

ÕÕ
AND GALLEY RELIEF
VALVE M
COMPRESSOR
8MD

10 MD
PRESSURE
AIR NO SWITCH
WATER VALVE

POTABLE WATER
TANK 3000 MD
FOR TRAINING PURPOSES ONLY!

TO AFT C/B PANEL

AND RELAY 9MD
M

LIMIT SWITCH

SERVICE
PANEL 171 AL

Figure 29 Air Supply Boost System (A318/319/321)

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WATER/WASTE A318/319/321
AIR SUPPLY BOOST SYSTEM
38−42

SYSTEM COMPONENTS PRESENTATION (A318/319/321)

The Air Compressor 8MD. The Check Valve 4206MM.
The compressor is a reciprocating piston type which is electrically driven. The The check valve makes sure that the compressed air flows only in the direction
compressor supplies 3801.6 in.3 (62297.19cm3 per minute of clean of the potable water tank.
compressed air at 30psi (2.0684bar) to the water tank. The compressor can
work continuously to give this pressure and volume of air.
The compressor has:
 an electric motor,
 a housing,
 a crankshaft,
 bearings,
 inlet and outlet valves,
 an inlet filter,
 a piston rod,
 a piston cup,
 a relief valve.
The electric motor is fan cooled and has its own housing. The motor operates
at 12000 rpm. A thermal−overload protection circuit stops the motor if it
becomes too hot. The thermal−overload protection circuit starts the motor
again when the temperature of the motor decreases to the normal temperature.
A driven pulley is connected to a crank shaft which connects to and moves a
piston and piston cup in the cylinder. The piston cup is filled with teflon material
and is self−lubricating. This is necessary to keep the compressed air output
clean.

The Pressure Switch 10MD.

FOR TRAINING PURPOSES ONLY!

The pressure switch 10MD senses the pressure in the potable water tank and
switches the electric motor (of the compressor) on and off. At 28psi
(1.9305bar) the pressure switch disconnects the 28V DC line from the relay.
This stops the electric motor. When the pressure in the potable water tank is
25psi (1.7236bar) the pressure switch connects the 28V DC line. This causes
the relay to start the electric motor of the compressor to pressurize the system.

The Air Filters 4211MM/4212MM.

The air filters stop the ingress of impurities into the system from the air around
the compressor.

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WATER/WASTE A318/319/321
AIR SUPPLY BOOST SYSTEM
38−42

Z170

FR66

Z170
FR65

COMPRESSOR
8MD
FOR TRAINING PURPOSES ONLY!

CHECK VALVE
4206M
PRESSURE
SWITCH
AIR FILTER
4212MM 10MD

Figure 30 Air Supply Boost System Components (A318/319/321)

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WATER/WASTE A318/319/320/321
AIR SUPPLY BOOST SYSTEM
38−42

POWER SUPPLY OPERATION (ALL)

The electric motor that drives the compressor is supplied with 115V AC at
400 HZ from the 3−phase AC BUS 2. This is switched to the motor through the
relay 9MD that is powered from the 28V DC GND/FLIGHT BUS.
Operation
A normal cycle of the compressor increases the pressure in the water tank to
28psi (1.9305 bar). At this pressure the pressure micro switch 10MD stops the
power supply to the relay 9MD.
If the air pressure in the potable water system decreases to below 25psi
(1.7236 bar):
 the pressure micro switch 10MD energizes the relay 9MD,
 the compressor starts and the pressure in the potable water system
increases for another cycle.
If the air pressure in the system increases to above 28 psi (1.9305 bar):
 the pressure micro switch 10MD de−energizes the relay 9MD,
 the compressor stops.
FOR TRAINING PURPOSES ONLY!

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WATER/WASTE A318/319/320/321
AIR SUPPLY BOOST SYSTEM
38−42

7.5 A

19 MD
8MD
212 XP
AIR COMPRESSOR
BUS 2
115V AC

9MD
RELAY

5A

1 MA
5MA
FOR TRAINING PURPOSES ONLY!

602 PP
GRD/FLT BUS LIMIT SWITCH
28V DC (POTABLE WATER
SERVICE PANEL
171AL OPEN) 10 MD
PRESSURE SWITCH
2001 VU ON PRESSURE < 22 PSI
C/B PANEL AFT OFF PRESSURE > 25 PSI

Figure 31 Air Compressor Power Supply (All)

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WATER/WASTE A318/319/320/321
QUANTITY INDICATION
38−13

38−13 QUANTITY INDICATION

SYSTEM DESCRIPTION (ALL)
The quantity indicating system gives a visual indication of how much water is LED (Light Emitting Diode)
available in the potable water tank. The indicating system is installed to assist The LED (Light Emitting Diode) indicator on the forward attendant panel shows
the ground and cabin service personnel. A preselection system is installed on the water tank contents in percentage of volume.
the FAP (Forward Attendant Panel).
Indicator Light 10MA
Water Quantity Transmitter 3MA
The indicator light 10MA on the potable water service panel will come on when
The water quantity transmitter 3MA is installed in the water tank and monitors the selected water quantity is reached and the fill/drain valve is closed.
the volume of water remaining in the tank
The quantity transmitter 3MA, operates as a variable capacitor and uses the Preselection Membrane Switches
water in the tank as the variable component. Any increase of water in the tank The preselection membrane switches are installed on the FAP. There are four
increases the output signal, any decrease in water decreases the output signal. switches for the preselection system, one for each percentage selection. The
The quantity indicator on the FAP (Forward Attendant Panel) gets its switches are used to let the potable water tank fill only to that quantity which is
information from the transmitter. The signal to the FAP LED indicator shows selected.
the percentage of volume if the panel Pushbutton is pressed. The FULL When you push one of the preselection membrane switches, the preselection
indication light on the service panel comes on when the tank is full or when the system is energized.
pre−selected value is reach. When the water quantity reaches the preselected value, the quantity
The transmitter also has a low−level switch which opens when the water tank transmitter 3MA sends a signal to the preselection control unit 7MA.
contents drop to a set level. When the low−level switch opens it disconnects The preselection control unit then sends a signal to close the fill/drain valve
the electrical supply to the water heaters in the lavatories. 16MA.
The transmitter also has a high−level switch, which controls the operation of a
relay to close the fill/drain valve 16MA. The high level switch will de−energize
the relay to stop the filling procedure when the tank is full.

Service Door 171AL

FOR TRAINING PURPOSES ONLY!

The service door 171AL operates the microswitch 5MA. The microswitch
controls the power supply to the quantity indicating system.
The microswitch 5MA closes to energize the indicating system when the
service door 171AL is opened for ground servicing. The microswitch 5MA
isolates the indicating system when the service door 171AL is closed again. A
membrane switch, identified by ’IND ON’, is installed on the forward attendant
panel. The membrane switch overrides the microswitch 5MA, if you push it in.

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WATER/WASTE A318/319/320/321
QUANTITY INDICATION
38−13

DOOR MICRO SWITCH 5MA

TANK FULL
CONTROL LIGHT 10MA

Z220
Z170

Z138

2023VU SERVICE PANEL

WATER CONTENT
QUANTITY TRANSMITTER 3MA
MEMBRANE
SWITCHES
(OPTIONAL)

WATER AND WASTE

WATER QTY IND SEL SEL SEL SEL

ON 25% 50% 75% 100%
FOR TRAINING PURPOSES ONLY!

X 0 25 50 75 100
POTABLE
WASTE QTY WATER TANK
3000MM
LIGHT

FWD ATTND PANEL 124RH

Figure 32 Quantity Indication Components (All)
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WATER/WASTE A318/320/321
QUANTITY INDICATION
38−13

PRESELECTION CNTRL. UNIT PRESENTATION (OPTIONAL) FR64

FR63
Preselection Control Unit 7MA
When the water quantity reaches the preselected value, the quantity
transmitter 3MA sends a signal to the preselection control unit 7MA.
The preselection control unit then sends a signal to close the fill/drain
valve16MA on the A320, or the fill/overflow and drain valve 8MA on the A321.

Z160

PRESELECTION
CONTROL UNIT 7MA
FOR TRAINING PURPOSES ONLY!

Figure 33 Preselection Control Unit (A320/A321)

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WATER/WASTE A318/320/321
QUANTITY INDICATION
38−13

ÎÎ
ÎÎ C F U
Î
Î
F U T DC A U
DC D I
100% TANK 12V Ua
FULL 28V Ue
CODE CONV. CODE CONV.
10% BCD 25% BCD

3MA QUANTITY TRANSMITTER 7MA PRE-SELECTION

CONTROL UNIT
38−12(9)200

38−12(9)200
4MA

15MA
2000VU

PUSH FOR IND

CTL LOGIC

9MA
WATER QTY

PRE-SELECT SW.
124RH WATER PANEL
120RH FWD ATTND PANEL
FOR TRAINING PURPOSES ONLY!

3MP LIMIT
SWITCH
38−42(9)600 5A 38−12(9)202
5MA DOOR M
LIMIT SW 1MA OPEN

Î
(DOOR OPEN) 602PP

Î
DC (SHUT IN
GND/FLT OPEN CLOSE
2MA 10MA FULL
38−12(9)202 INDICATOR POSITION)
2001VU 2023VU 8MA FILL SHUT VALVE
Figure 34 Quantity Indication Electrical Schematic (A318/320/321)
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WATER/WASTE A318/319/320/321
DISTRIBUTION
38−12

38−12 DISTRIBUTION WATER FAUCET

PRESENTATION (ALL)
Potable water from the water tank is supplied through a system of distribution
lines. Routing for the distribution lines to the front and rear galleys and
lavatories is below the passenger compartment floor. A part of the forward GALLEY
distribution line to the front services passes through a hose, for added FWD
WATER HEATER
protection.
The potable water−distribution lines are insulated and electrically heated in
RINSE WATER VALVE
section 13 to prevent ice formation in and around the lines.
Mechanically or electrically operated valves control the supply of the potable TOILET
water system. Compressed air is used to pressurize the system to supply ASSY
water from the tank to the necessary service locations. Compressed air is
tapped from the cross feed line of the engine bleed air and is connected to the
water tank air−inlet.
TWO DIFFERENT WATER FAUCETS MANUAL
Config: 1 SHUT−OFF
VALVE
The water faucets have a self−venting valve, push knob and spout. Water is
available when light pressure is applied to the push knob. Water flow will stop
automatically after release of the push knob and completion of the valve
time−delay sequence. Each water faucet is connected to a mixing unit.
The mixing unit is installed under the wash basin and connected to the hot
(red) and the cold (blue) potable water supply lines. A thermostat is installed on
the mixer unit. You can set the thermostat to that water temperature you want
on the water outlet.
FOR TRAINING PURPOSES ONLY!

Config: 2
The water faucets have a self−venting mixing valve, push−lever and spout.
The mixing valve includes a time delay device and is connected to the hot
(water heater) and the cold−water supply lines. The push−lever is installed on
the mixing valve and includes hot (red) and cold (blue) water identification and
selection arrows. Hot water, mixed flow, or cold water is available when light
pressure is applied to the push−lever. Water flow will stop automatically after
release of the push−lever and completion of the mixing−valve time−delay WATER SUPPLY AND
sequence. DRAIN LINE
Figure 35 FWD Lavatory and Galley System (A319−21)

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WATER/WASTE A318/319/320/321
DISTRIBUTION
38−12

LAVATORY
EXAMPLE

TIMER

WATER
OUTLET

PRESS ON
FOR TRAINING PURPOSES ONLY!

THERMOSTAT

WATER FAUCET CONFIG 1 WATER FAUCET CONFIG 2

Figure 36 Water Faucets (All)

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WATER/WASTE A318/319/320/321
DISTRIBUTION
38−12

WATER HEATER DESCRIPTION (ALL)

MANUAL WATER SHUT − OFF VALVE Config 2
The manual shut−off valve isolates the water faucet and the toilet from the This heater regulates the water temperature between 45 C and 51 C.
potable−water distribution system when closed. It is usual for the valve to An Overtemperature protection will be done by an internal overtemperature
remain in the ’OPEN’ position. The shut−off valve is installed under the toilet switch, this opens the heating circuit above 72 C. A reset can be done through
shroud. You gain access to the valve through the access panel at the front of the ON/OFF switch when the temperature is below 35 C and after a time
the shroud. delay of 9 minutes.
RINSE WATER VALVE An internal pressure sensor cuts off the power to the heating element when the
pressure is below 7,25 psi. The pressure sensor is reset automatically when
The toilet rinse valve is solenoid controlled and is electrically operated.
the pressure increases above 11 psi.
TWO DIFFERENT HEATERS A pressure relief valve reduces the pressure when it is above 55 psi.
An internal low level switch cuts off the electrical power to the heating element
Config 1
when the water level in the heater is below one liter. The resets automatically
The water heater is installed under the washbasin inside the sanitary unit above this level.
cabinet. The potable−water supply line is connected to the heater inlet and the
outlet is connected to the water faucet. The water heater has a capacity of 1.5 l
(0.4 US gal), the maximum quantity of water that can be heated at one time.
The water heater ON/OFF switch is found on the top part of the unit.
When you set the ON/OFF switch to ON the water heating element energizes
(control light is on). When the water heats to a set temperature, a thermostat
opens to remove the electrical power from the heating element. When the
water temperature drops (usual heat decrease or as cold water replaces used
hot water) the thermostat closes to energize the heating element again.
This sequence continues for as long as the water temperature changes and the
ON/OFF switch is set to ON. The thermostat is set to open (GO OFF) when
the water temperature increases to 48 DEG. C (118.40 DEG. F). It is set to
close (COME ON) when the water temperature decreases to 45 DEG. C
FOR TRAINING PURPOSES ONLY!

(113.00 DEG. F). An over−temperature safety device which has a temperature

range of 55 DEG. C (131.00 DEG. F) to 65 DEG. C (149.00 DEG. F) protects
the heating element.
You can reset the safety device with the pushbutton which is on the top part of
the water heater (under a cover).

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WATER/WASTE A318/319/320/321
DISTRIBUTION
38−12

LAVATORY
EXAMPLE

ON-OFF
SWITCH
COVER

CONTROL- RESET
LIGHT TO BUTTON
MIXING
VALVE

WASH BASIN
ACCESS PANEL TO
WATER SHUTOFF
ACCESS PANEL TO VALVE (OPTIONAL)
WATER SHUTOFF
VALVE (OPTIONAL)
WATER SHUTOFF VALVE
OVERPRESSURE
FOR TRAINING PURPOSES ONLY!

RELIEF VALVE

WATER HEATER CONFIG 1 WATER HEATER CONFIG 2

Figure 37 Water Shutoff Valve and Water Heater (All)

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WATER/WASTE A318/319/320/321
DISTRIBUTION
38−12

ELECTRICAL OPERATION (ALL) 212XP

BUS 2
115VAC
9MB
214XP
LAVATORY E
BUS 2 HOT WATER
115VAC 2MB
1MB
LAVATORY D
HOT WATER
HOT 8MB
WATER
HOT WATER

4MA
2MA

2000VU 2000VU
CIRCUIT QUANTITY CIRCUIT QUANTITY
BREAKER TRANSMITTER BREAKER TRANSMITTER
1MA (2001VU) LOW LEVEL SWITCH 1MA (2001VU) LOW LEVEL SWITCH

OVER ON/ OVER ON/

TEMP OFF TEMP OFF
SWITCH SWITCH SWITCH SWITCH
ELECTRICAL ELECTRICAL
FOR TRAINING PURPOSES ONLY!

REGULATOR REGULATOR

É ÉÉ
EMIT SHIELDING É ÉÉ
EMIT SHIELDING

É
É É
É
LAVATORY A LAVATORY H
Figure 38 Water Heater (CONFIG 1) Elec. Schematic (All)
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WATER/WASTE A318/319/320/321
DISTRIBUTION
38−12

2MB
LAVATORY E
HOT WATER
9MB
LAVATORY D
HOT WATER
212XP
QUANTITY
BUS 2
TRANSMITTER
CIRCUIT 115VAC
LOW LEVEL SWITCH
BREAKER
1MA (2001VU) 2MA
2001VU

1MB 9MB
HOT WATER
214XP
BUS 2 QUANTITY
CIRCUIT 115VAC TRANSMITTER
BREAKER LOW LEVEL SWITCH
1MA (2001VU) 4MA
2000VU

51.7− 77 C AC
#2,2 C
DC
FOR TRAINING PURPOSES ONLY!

LOW WATER HEATER

RFI
SUPPRESS
DETECTION ELEMENT

WATER HEATER
ÉÉ
115V
LAVATORY A
Figure 39 Water Heater (CONFIG 2) Elec. Schematic (All)
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WATER/WASTE A318/319/320/321
WASTE WATER DRAIN
38−32

38-32 WASTE WATER DRAIN LAVATORY

GENERAL (ALL) GALLEY

The waste−water drain system disposes the waste water from the lavatory WASTE
washbasins and the galley sinks. WATER
DRAIN
The system has:
DRAIN ASSEMBLY
 washbasin drain assemblies in the lavatories and galleys,
 drain valves in the sanitary unit cabinets,
 drain lines and the heated drainmasts.
OVERFLOW
Drain Assembly DRAIN VALVE
The lavatory washbasins have a drain valve assembly. This drain valve
assembly has a valve body with drain and overflow connections. Optional is a
control cable and control knob. The control cable connects the valve to the
control knob.
Drain Valve FLOOR
The drain valves, which are installed in the drain lines, have a valve body with
inlet/outlet connections, and a diaphragm. The valves prevent leakage of cabin
air through the drain lines. The valves also have a backflow prevention device.
The backflow prevention device which is integrated in the drain valves prevents
backflow of water through the outlet side of the valves.

Drainmast
Waste water is discarded to the outside through two drainmasts, which are
installed on the lower fuselage shell. The pressure difference between the
FOR TRAINING PURPOSES ONLY!

cabin and the drainmasts outlet discards the waste water through the
drainmasts in flight.
Gravity discards the waste water through the drainmasts on the ground.
The two masts have integrated electrical heating−elements to prevent the FUSELAGE SKIN
water from freezing during high−altitude flights or during cold weather.
The heating elements are connected to the aircraft electrical network (Ref:
30−71−00).

DRAINMAST
Figure 40 Lav. Washbasin Waste-Water Drain (All)

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WATER/WASTE A318/319/320/321
WASTE WATER DRAIN
38−32

GALLEY

LAVATORY

OVERFLOW

DRAIN VALVE
(AIR STOP
DRAIN VALVE VALVE)
(AIR STOP
FOR TRAINING PURPOSES ONLY!

VALVE)

DRAIN MAST
Figure 41 Water/Waste System Overview (All)
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ICE AND RAIN PROTECTION A318/319/320/321
DRAIN MAST ICE PROTECTION
30-71

ATA 30 ICE AND RAIN PROTECTION

30-71 DRAIN MAST ICE PROTECTION
SYSTEM DESCRIPTION (ALL)
The waste water ice protection is installed to prevent ice formation in the drain Control Unit 5DU and 15DU
lines and fwd and aft drain masts. The waste water which comes from the All control units of the waste water ice protection system are provided with
galley and lavatory washbasins is discarded through the drain lines and drain internal BITE test.
masts to atmosphere. Waste water lines installed in areas of possible icing
The BITE function monitors the correct function of:
conditions, are heated by electrical tape heating elements and insulated.
 the control and monitor circuits,
Heaters are installed in the fwd and aft drain masts to prevent ice formation.
 the connected heater elements (tapes),
Ice−Protection control units installed in the fwd and aft cargo compartments
regulate through the sensors the heating elements of the drain lines and drain  the connected temperature sensor,
masts.  the internal solid states relays,
 the power supply of the system,
Drain Mast
 the interface connector.
Each drain mast assembly has:
A test button located on top of the control unit, when pressed will start an
 an aluminum alloy housing (aerodynamic shape),
internal BITE test to check the system. Two LEDs (Light Emitting Diodes) in
 a drain tube with integrated electrical heating − elements, the control unit show the correct status of the system ”Heater OK” and ”Unit
 an PTC temperature sensor (measures the ambient temperature), OK”.
 an over temperature switch (prevents damage to heating element), You start the BITE when you push the TEST pushbutton, located on the top of
 A flange for installation of the drain mast is part of the top of the fairing. the control unit.
Two ice protection control units 5DU and 15DU control the 115V AC 400Hz Two LEDs (Light Emitting Diodes) show the correct status of the system.
single phase to the related heater of the drain masts. Additional the control units of the drainmast heating system are connected with
The drain mast heating element operates from −55 C (−65 F) to +75 C three discrete lines to the CIDS (Cabin Intercommunication Data System), via a
FOR TRAINING PURPOSES ONLY!

(+160 F). DEU−B. A test menu displayed on the CIDS PTP (Programming and Test
Panel) gives you the facility to start a BITE test of the drainmast heating
The overtemperature switch installed in the drain mast will stop the power
system without the need to remove the sidewall panels installed in the FWD
supply if the temperature increases above +120 C (+250 F).
and AFT cargo compartments.
Waste water lines. When you initiate the test via the PTP, a 28VDC signal starts the internal BITE
The waste water ice protection system cannot be controlled manually. function of the related control units. Two LED GND signals, ’HEATER OK’ and
’UNIT OK’, shows the correct status of the drainmast heating system.
The waste water ice protection system operates automatically when the related
circuit breakers are closed. NOTE: For deactivation of the Waste Water Drain Mast Heating System
The system is available with the aircraft electrical−circuits energized with 115 V refer to MEL Task 30-71-01
AC and through closed circuit breakers 1DU and 11DU.

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ICE AND RAIN PROTECTION A318/319/320/321
DRAIN MAST ICE PROTECTION
30-71

STA3310/FR69
Z170
Z160 STA3257/FR68

Z130
1
DRAIN MAST
4DU/14DU

14DU

WASTE WATER
OUTLET

STA2990/FR63
CONTROL UNIT
5DU/15DU
STA3043/FR64
FOR TRAINING PURPOSES ONLY!

5DU
FWD DRAIN MAST
ICE PROTECTION
CONTROL UNIT 4DU 1

Figure 42 Drain Mast Heating (All)

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Lufthansa Technical Training
ICE AND RAIN PROTECTION A318/319/320/321
POTABLE WATER ICE PROTECTION
30-73

30−73 POTABLE WATER ICE PROTECTION

PRESENTATION (ALL)
A FORWARD CARGO COMPARTMENT
Potable Water Service Panel
The potable water service panel heating is installed to prevent ice formation in
the potable water servicing panel in icing conditions.
The fill/drain nipple and overflow nipple are electrically heated to prevent ice
formation of the remaining water in the fill/drain nipple and overflow nipple
POTABLE/WASTE
which could cause a blockage or damage to the nipples.
WATER ANTI-ICE
A control unit through a thermostat controls the potable water service panel CONTROL UNIT
heating.
Waste Service Panel
The waste service panel heating is installed to prevent ice formation in the
waste servicing panel in icing conditions.
The flush nipples are electrically heated to prevent ice formation of the
remaining water in the flush nipples which could cause a blockage or damage
to the nipples.
A control unit through a thermostat controls the waste water service panel
heating.
B
(TYPICAL)
HEATER ELEMENT

A
FOR TRAINING PURPOSES ONLY!

ADHESIVE
FWD CARGO TAPE

POTABLE
WATER
WASTE
GLASS WATER
WOOL MAT
B
Figure 43 Potable Water Heating, Ice Protection (All)

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Lufthansa Technical Training
ICE AND RAIN PROTECTION A318/319/320/321
POTABLE WATER ICE PROTECTION
30-73

É THERMOSTAT
12VD

15VD
É
HEAT
DRAIN PANEL
115VAC 12VD THERMOSTAT
FILL AND DRAIN
210XP−C
BUS2 THERMOSTAT
14VD FILL / DRAIN
NIPPLE 11VD
2001VU
11VD NIPPLE−HEATED
FILL AND DRAIN

É
É FILL AND DRAIN

É
É OVERFLOW
OVERFLOW
NIPPLE 13VD

14VD THERMOSTAT
OVERFLOW
FOR TRAINING PURPOSES ONLY!

13VD NIPPLE−HEATED

É
OVERFLOW

É
POTABLE WATER
FILL / DRAIN
CONTROL
HANDLE
SERVICE PANEL
POTABLE WATER SERVICE PANEL
Figure 44 Potable Water Ice Protection (All)
FRA US/T-5 RrU Mar 9, 2010 14|30−73|All|WIP|L2/B1/B2 Page 71
Lufthansa Technical Training
ICE AND RAIN PROTECTION A321
DRAIN MAST ICE PROTECTION
30-71

30−71 DRAIN MAST ICE PROTECTION

WASTE WATER LINE HEATERS INTRODUCTION (A321)
The rear galley and rear lavatory waste water drain lines have heater
assemblies which are installed on the drain lines with bonding tape.
115V AC is supplied to the control unit 140DU which controls the related
sensor and heaters installed on the rear lavatory waste line.
115V AC is supplied from the GND/FLT busbar to the control unit 180DU
which controls the related sensor and heaters installed on the rear galley waste
line.
The sensor measures the waste water drain lines permanently, the control unit
compares the measured values with the stored reference values. When icing
conditions occured the control unit will turn on the power supply to the related
tape heating circuits.
A test button located on top of the control unit, when pressed will start an
internal BITE test to check the system.
Two LEDs (Light Emitting Diodes) in the control unit show the correct status of
the system ” Heater OK ” and ” Unit OK ”.
FOR TRAINING PURPOSES ONLY!

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Lufthansa Technical Training
ICE AND RAIN PROTECTION A321
DRAIN MAST ICE PROTECTION
30-71

180DU
Z120 197DU 140DU
FR24
193DU
196DU

147DU
FR35.5
146DU
186DU

WATER/WASTE LINE
192DU FR31
FR1
HTR180
CNTRL
182DU HTR 140
UNIT
142DU CNTRL
181DU HTR180 UNIT
SENSOR FR30 FR24
CNTRL
141DU
UNIT
SENSOR
191DU
SENSOR 16
CONTROL UNIT 140DU
16
CONTROL UNIT 180DU
+ TEST +
TEST
+ + +
“OK“ “OK“
“OK“ + “OK“
+ +
PAL PAL
GND/FLT 102DU GND/FLT 102DU
BUS BUS
14 14
FOR TRAINING PURPOSES ONLY!

212XP-A 7.5A 212XP-A + +

115VAC 7.5A =
+5V 115VAC
+ + +5V
GND/FLT 9DU =
BUS GND/FLT 9DU
602PP 2.5A 2.5A 2.5A 2.5A BUS
2A 602PP 2.5A 2.5A 2.5A 2.5A
28VDC 2A
28VDC
2000VU 2 8 DC DC 20 25
FWD C/B PANEL 2000VU 2 8 DC DC
FWD C/B PANEL

142DU 147DU
146DU
HTR 140/I
182DU 186DU 192DU 193DU 196DU 197DU HTR 140/II
HTR 180/I HTR 180/II HTR 180/III HTR 180/IV

Figure 45 Water Drain Line Heating (A321)

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Lufthansa Technical Training
COMMUNICATIONS 319/320/321
CABIN INTERCOMMUNICATION DATA
SYSTEM (CIDS) 23-73

ATA 23 COMMUNICATIONS SLIDES ARMED

The SIDES ARMED indication light is off when all slides are disarmed. When at
23-73 CABIN INTERCOMMUNICATION least one slide is armed the indication light flashes (green). When all slides are
armed the indication light (green) is steady on.
DATA SYSTEM (CIDS)
DOORS CLOSED
The CIDS (Cabin Intercommunications Data System) is used to operate,
control, monitor and test various cabin functions. The DOORS CLOSED indication light comes on, when all doors are closed.
When at least one door is opened, the indication light goes off.
MISCELLANEOUS MODULE INTRODUCTION (NON
ENHANCED) CABIN READY
When you push the CABIN READY membrane switch, the CABIN READY
CIDS Caution Light indication on the ECAM panel in the flight compartment comes on. This
function indicates that the cabin is ready for take−off. You can do a manual
This light is resettable in flight, but comes on again on the ground (Landing
reset when you push the CABIN READY membrane switch again. The CABIN
gear down and locked). The light cannot be reset on the ground. When a CIDS
READY function is automatically reset after take−off.
CAUTION occurs, the respective failure message is displayed on the
programming and test panel.
CIDS PNL LIGHT TEST
SMOKE LAV Light The CIDS PNL LIGHT TEST membrane switch switches on all the lights in the
panel and the membrane switch integral light as long as the membrane switch
This light comes on when a signal from the smoke detector is received.
is pressed.

WASTE QTY LED

RESET
The WASTE QTY LED display shows the actual contents in the waste tank
The RESET membrane switch switches off the warning horn, if the evacuation
graduated in 20 steps, each step is equal to 5%.
system is activated (if installed) . It also switches off the lavatory smoke
warning if the warning is activated. The membrane switch switches a discrete
FOR TRAINING PURPOSES ONLY!

IND ON Switch input to ground.

It is to switch on the water and waste indicating system.
LIGHT EMER
SEL 25%, SEL 50%, SEL 75% and SEL 100% The LIGHT EMER pushbutton switch switches on the emergency lighting
Pushing one switch, stores the related value to the preselection control unit. system. The integral light in the pushbutton switch comes on. Pushing the
Pushing a second switch stores the new value and erases the previous value. pushbutton switch a second time switches off the emergency lighting system
and the integral light. The function of the pushbutton switch is independent
from the CIDS power supply.
SYSTEM INOP, LAV INOP
The SYSTEM INOP indicator light comes on, if the vacuum waste system fails.

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Lufthansa Technical Training
COMMUNICATIONS 319/320/321
CABIN INTERCOMMUNICATION DATA
SYSTEM (CIDS) 23-73

FAP A319/A320/A321 (NON ENHANCED TECHNOLOGY)

(OPTIONAL)

WATER AND WASTE

IND SEL SEL SEL SEL

WATER QTY
ON 25% 50% 75% 100%

% 0 25 50 75 100

WASTE QTY SYSTEM LAV. B LAV. D LAV. E LAV. H

INOP INOP INOP INOP INOP
FOR TRAINING PURPOSES ONLY!

SMOKE CIDS

PNL
SLIDES DOORS LAV RESET CABIN LIGHT CAUT
ARMED CLOSED READY TEST

Figure 46 Miscellaneous Module

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Lufthansa Technical Training
COMMUNICATIONS 319/320/321
CABIN COMMUNICATION DATA SYSTEM
(CIDS) 23−73

PROGRAMMING & TEST PANEL PRESENTATION (NON CIDS SYSTEM STATUS FUNCTION (NON ENHANCED)
ENHANCED) The SYSTEM STATUS mode monitors the current status of the CIDS.
The PTP (Programming and Test Panel) 110RH is installed in the wall opposite This includes the directors, the DEUs, the data buses, the CAM, the FWD
of the FWD lavatory. It is located at the FWD attendant station, behind a ATTND PANEL, the PTP and the interfaces to other systems.
hinged access door next to the FWD attendant panel. The PTP enables The DOOR STS menu is selected to display the status of the A/C doors (close
personnel to extensively test and re−program the CIDS. or open).
To activate CIDS component tests and the readout of the results the PTP has The SLIDES STS menu is to display the status of the A/C slides (armed or
an alphanumeric display with four rows of twenty characters. The display is disarmed).
used to present messages, test results and selection menus. A conventional
For use by the maintenance/cabin crew, the status of the following systems is
keypad is provided for entry of numerical data.
also monitored:
ATTENTION: Pressing One membrane switch activates the display in on.  Lavatory Smoke Detection
 Slides Bottle Pressure
 Doors Bottle Pressure
 Drainmasts (According the WATER/WASTE SYSTEM)
After selection of SYSTEM STATUS mode, when there are no failures, the
following messages are displayed on the PTP:
 CIDS OK
 LAV SMOKE DATA OK
 SLIDES PRESS OK
 DOORS PRESS OK
 DRAINMASTS OK (According the WATER/WASTE SYSTEM)
FOR TRAINING PURPOSES ONLY!

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Lufthansa Technical Training
COMMUNICATIONS 319/320/321
CABIN COMMUNICATION DATA SYSTEM
(CIDS) 23−73

START HERE

DSPL
ON

STEP 1 STEP 2

CIDS SYSTEM STATUS

SYSTEM STATUS CIDS OK

SYSTEM TEST LAV SMOKE DATA OK

PROGRAMMING RET CONT

PROGRAMMING AND TEST PANEL

STEP 3

ATTENTION: System Status is automatically

shown in case of a failure SLIDES PRESS OK
FOR TRAINING PURPOSES ONLY!

DOOR PRESS OK

DRAIN MASTS OK
RET CONT

Figure 47 CIDS Programming and Test Panel

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Lufthansa Technical Training
COMMUNICATIONS 319/320/321
CABIN COMMUNICATION DATA SYSTEM
(CIDS) 23−73
System Status Readout (Drain Mast Fail)
Messages in case of:
<DRAINMASTS FAIL>:
CHECK WASTE WATER OVERFLOW FWD (example, the respective location
is shown)

System Status Readout (Others)

ATTENTION: The System Status Readout according SLIDES (ATA 25),
DOORS (ATA 52) and LAVATORY SMOKE SYSTEM (ATA 26)
is described in the associated ATA Chapters.
FOR TRAINING PURPOSES ONLY!

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Lufthansa Technical Training
COMMUNICATIONS 319/320/321
CABIN COMMUNICATION DATA SYSTEM
(CIDS) 23−73

STEP 1 STEP 2

SYSTEM STATUS
CHECK WASTE WATER

DRAIN MAST FAIL OVERFLOW FWD, AFT

CIDS OK

RET CONT RET

FOR TRAINING PURPOSES ONLY!

Figure 48 System Status

FRA US/T-5 RrU Mar 9, 2010 02|All|CIDS|L2/B1/B2 Page 79
Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

38-31 TOILET SYSTEM The differential pressure now moves the waste from the toilet bowl to the waste
holding tank. Above 4877 +0 −0 m (16000.94 +0.00 −0.00 ft.) altitude, the flush
cycle will stay the same. But the vacuum system controller will remove the
GENERAL DESCRIPTION
electrical power from the vacuum generator and stop the generator operation.
The toilet system removes waste from the toilet bowl through a vacuum drain
to an underfloor waste holding tank. The potable water system is used to flush
the toilet bowl.
At high altitude, the differential pressure between the cabin and the ON
atmosphere moves waste from the toilet bowl into the waste holding tank. FLUSH SWITCH OFF
At low level altitude, a vacuum generator is used to obtain the necessary
differential pressure.
ON
During ground service, the waste holding tank is emptied, cleaned and filled VACUUM GENERATOR OFF
with a prescribed quantity of sanitary fluid.
Flush Rinse Control ON
WATER VALVE OFF
A Flush Control Unit per toilet controls the flush and rinse cycle as soon as the
flush switch is pressed in.
ON
FLUSH VALVE OFF
Vacuum Control
Depending on the differential pressure, a VSC (Vacuum System Controller)
INHIBIT
automatically operates a vacuum generator. NEXT CYCLE INHIBIT OPERATIVE
The vacuum system controller monitors the operation of the flush control (ON ENHANCED A/C THE
system and the waste holding tank level. FLUSH CYCLE IS REDUCED)
012 4 6 8 10 12 14 16 SEC.
Flush Cycle Sequence
Figure 49 FCU Flush Cycle (All A/C))
The time and sequence of the different components is controlled through the
FCU (Flush Control Unit), which controls the toilet flush cycle. The FCU BITE The following parts are monitored by CFDS:
monitors the water valve, flush valve and internal control circuitry. If a fault is  Liquid Level Sensor and Liquid Level Transmitter
detected, it is transmitted to the VSC (Vacuum System Controller).
 Vacuum Generator
FOR TRAINING PURPOSES ONLY!

The flush cycle starts when you push the flush switch and the FCU starts the
flush sequence as follows:  Vacuum System Controller
 the inhibit mode checks the system and inhibits the next flush cycle of the  Altitude Pressure Switch
other toilets for approximate 15 seconds,  Flush Switch
 the vacuum generator starts to operate after the operation of the flush  FCU (Flush Control Unit)
switch, and stays on for approximate 15 seconds, ATTENTION: On the A/C with enhanced Technology, the VSC function is
 the water valve opens 1 second after operation of the flush switch and stays integrated into the CIDS (Cabin Intercommunication Data
open for one second. In this time the toilet bowl is rinsed. System) director, the altitude data come from CPC (Cabin
 the flush valve opens 2 seconds after operation of the flush switch and it Pressure Controller) via the SDAC (System Data Acquisition
stays open for 4 seconds. Concentrator).

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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

ENABLE FLUSH ATTENTION: On the A/C with enhanced

Technology, the VSC
function is integrated into
the CIDS director, the
FLUSH altitude data come from
SWITCH CPC via the SDAC.
FLUSH
CONTROL FORWARD
FROM POTABLE UNIT FWD
WATER SYSTEM ATTENDANT
LAVATORY PANEL
UNITS (FAP)

FLUSH VALVE CABIN

FLOOR
WATER VALVE
AFT LAVATORY UNITS

LGCIU

WATER
SEPARATOR
VSC CFDS
WASTE
HOLDING LIQUID
VACUUM RS-232−C
TANK LEVEL
GENERATOR INTERFACE
SENSOR
FOR TRAINING PURPOSES ONLY!

LIQUID LEVEL
RINSE WASTE TRANSMITTER
CONNECTION DRAIN
VALVE ALTITUDE
PRESSURE
SWITCH
TOILET SERVICE PANEL LIMIT SWITCH P
CONTROL DRAIN WASTE QUANTITY AIRCRAFT SKIN
OPTIONAL
HANDLE CONNECTION INDICATOR
Figure 50 Toilet System Schematic (All A/C)
FRA US/T-5 RrU Mar 9, 2010 03|38−31|All|Gen|L1/B1/B2 Page 81
Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

TOILET ASSY COMPONENT DESCRIPTION (ALL)

EACH TOILET ASSEMBLY HAS: Manual Waste Shutoff Valve
 a bowl and spray ring, The MWV (Manual Waste shutoff Valve) is installed on the downstream side of
 a water (rinse) valve the flush valve. It is a back−up system to shutoff the flush line in case of a flush
valve failure in the open position.
 an anti−syphon valve,
A handle accessible from the front of the toilet assembly activates the sliding
 a flush valve,
mechanism inside the shutoff valve.
 a manual waste shutoff valve,
 a flush control unit, Flush Control Unit
 a supporting frame. The flush control unit is an electronic assembly installed on the supporting
frame of the toilet assembly.
Bowl and Spray Ring It is connected electrically to the:
The bowl is made of stainless−steel and has a nonstick coating applied to its  flush switch,
inside surface. The spray ring is attached to the top of the bowl and connected
 water (rinse) valve,
to the anti−syphon valve.
 flush valve,
Water (Rinse) Valve  vacuum system controller.
The water (rinse) valve is solenoid controlled and is connected electrically to The unit controls the time and sequence of the toilet operation during the flush
the flush control unit. It has a fitting for the aircraft system interface and a cycle. BITE (Built In Test Equipment), monitors the operation of the water
strainer. The outlet of the valve is connected to the anti−syphon valve. valve, flush valve and its internal control board circuitry. Faults are transmitted
to the vacuum system controller.
Anti−Syphon Valve
The anti−syphon valve is installed above the toilet bowl and is connected to the
water valve and the spray ring. It permits water to flow only in the direction of
the spray ring and returns any back−water to the bowl.
Flush Valve
FOR TRAINING PURPOSES ONLY!

The flush valve is a motor−actuated self−contained unit. A duct connects the

flush valve to the toilet bowl. The flush valve housing is a stainless−steel
investment casting. Waste flows through a 2.0 in. (50.7999 mm) dia. moulded
and reinforced elastomer tube. The tube is fully open during the flush cycle.
A motor−actuated pinch−knife closes and seals the tube between the flush
cycles. The flush control unit controls the flush valve operation.
A manual waste shutoff valve is installed on the downstream side of the flush
valve.

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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

BLOCKAGE
REMOVAL

CONFIG 1

SPRAY RING

ANTI−SYPHON CONFIG 2
TOILET BOWL VALVE

WATER RINSE VALVE

AND STRAINER
FOR TRAINING PURPOSES ONLY!

FLUSH VALVE FLUSH CONTROL

UNIT
MANUAL WASTE
SHUT−OFF VALVE

PULL HANDLE

Figure 51 Toilet Assy (All)

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Lufthansa Technical Training
WATER AND WASTE A319/320/321
TOILET SYSTEM
38−31

WASTE LEVEL INDICATION (NON ENHANCED)

Liquid Level Transmitter 40MG
The LLT (Liquid Level Transmitter) gives the waste content level of the waste
holding tank from empty to full. It measures the hydrostatic pressure of the tank
contents.
The LLT is connected electrically to the VSC. It gives the VSC an analog signal
for the waste content of the tank. The VSC calculates and transmits the signal
to the FAP (Forward Attendants Panel) for waste quantity indication.
Liquid Level Sensor 41MG
The LLS (Liquid Level Sensor) is an ultrasonic type sensor it is connected
electrically to the VSC. When the waste holding tank content level is at full, the
LLS sends a signal to the VSC.
When the VSC receives a tank full signal, (from the LLS) it shuts down the
toilet systems and the SYS INOP legend on FAP comes on. Under normal
operation the LLS has the priority to transmit tank full to the VSC.
NOTE: The liquid level sensor operates independently of the liquid level
transmitter.
FOR TRAINING PURPOSES ONLY!

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Lufthansa Technical Training
WATER AND WASTE A319/320/321
TOILET SYSTEM
38−31

INDICATOR
120RH

WATER QTY IND SEL SEL SEL SEL

ON 25% 50% 75% 100%
% 0 25 50 75 100

SYSTEM LAV . H LAV . D LAV . E

WASTE QTY INOP INOP INOP INOP

NON-ENHANCED CONTROL
AND INDICATION

VACUUM SYSTEM
CONTROLLER
LIQUID LEVEL 31MG
SENSOR
41MG
FOR TRAINING PURPOSES ONLY!

WASTE HOLDING
TANK
3300MM

LIQUID LEVEL
TRANSMITTER
40MG
Figure 52 Waste Level Indication
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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

VSC CFDS SYSTEM REPORT/TEST (ALL)

Monitoring Menu Mode:
The VSC has a BITE (Built−In Test Equipment) which operates in two modes: When requested (during line maintenance) the VSC will first transmit the menu
 the power−up test, as follows:
 the continuous monitoring test  TOILET SYS
It monitors if the following external system circuits function correctly:  < LAST LEG REPORT >
 the flush control units,  < PREVIOUS LEGS REPORT >
 the liquid level transmitter 40MG,  < LRU IDENTIFICATION >
 the altitude pressure switch 43MG,  < RETURN PRINT >
 the differential pressure transducer 42MG, If the operator selects an item of the menu, the VSC will transmit the data to
the CFDS.
 the vacuum generator 37MG,
 Last Leg Report
 the liquid level sensor 41MG,
− the DATE and GMT (Greenwich Mean Time) at which each fault
 the aircraft power supply 115 V AC (400 Hz).
occured,
− the identity of each faulty LRU, their related SRU, and the ATA chapter
reference.
 Previous Legs Report
The PREVIOUS LEGS REPORT contains:
− the aircraft identification,
− the DATE, GMT and flight leg count at which each fault occured,
− the identity of each faulty LRU, their related SRU and the ATA chapter
reference.
LRU Identification
FOR TRAINING PURPOSES ONLY!

The LRU identification contains the part number of the VSC.

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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

STEP 2 B


   →
A     

    


     
      
STEP 1
B  
  
    
   

 
 
NEXT

 PAGE
 
A
  
         
     
  
FOR TRAINING PURPOSES ONLY!

     

SEE NEXT FIGURE

Figure 53 CFDS System Report/Test VSC (1) (All)

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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

THIS PAGE INTENTIONALLY LEFT BLANK

FOR TRAINING PURPOSES ONLY!

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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

FROM PREVIOUS FIGURE

  
A   
B    
C   
 
    
  
 
A  C

     
   MENU MODE   
 
 
     
    "
 !""

   B   

  
LAST LEG REPORT     LRU IDENTIFICATION
FOR TRAINING PURPOSES ONLY!

#$$$$
   
   %
$$ &  !""&

  

PREVIOUS LEG REPORT

Figure 54 CFDS System Report/Test VSC (2) (All)
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Lufthansa Technical Training
WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

Vacuum System Controller Functional Operation

The VSC (Vacuum System Controller) is installed on the right of the lower When the limit switch on the waste service panel indicates OPEN panel and
section of the fuselage between FR62 and FR63. The VSC is connected LG (Landing Gear) signal indicates GROUND position (LG strut compressed):
electrically to the aircraft power circuit and electrical interfaces of the:  the VSC stops all toilet operations and the flush signals are ignored,
 flush control unit(s),  the SYS INOP light on the FAP is switched on.
 liquid level transmitter, If the LG signal indicates Flight and the waste service panel is open the system
 liquid level sensor, will not be disable and it will be able to flush the toilets while the servicing is
 altitude pressure switch, done.
 differential pressure transducer, The VSC will not react on a single LG fault, because the VSC BITE does not
control the LG signal.
 CFDS (Centralized Fault Display System) via ARINC 429 data bus.
The VSC functions are: Failure Mode
 system control and monitoring, The VSC transmits the system defects to the ARINC 429 data bus. The VSC
 fault reporting. memorizes the following defect signals for ground maintenance and inspection.
The VSC calculates and transmits signals to the FAP to indicate the waste tank  Flush control unit defect:
levels and reports system defects. The VSC memorizes and also signals the − all corresponding toilet operations are stopped and the defective LAV
system defects to the ARINC 429 data bus which is connected to the CFDS. INOP legend on the FAP comes on.
Defect signals are also sent to a RS 232−C interface for ground maintenance  115 V AC power supply shutdown (no signal input for at least one second):
and inspection.
− the toilet which is in the flush cycle will stop and the VSC will indicate
Normal Operation system INOP on the FAP,
When the VSC receives a signal from a FCU: − the VSC will start normal operation again when the power supply has
returned for at least 1 second.
 it stops the operation of all other FCUs,
The VSC will transmit and keep the defect data but the system will operate
 it makes an analysis of the altitude pressure switch indication,
normally if the LLS indicates a full tank and the LLT does not (current signal
 it starts the vacuum generator if the altitude pressure switch gives a signal 17.6 mA)
low (below 4877 m (16000.94 ft.)),
FOR TRAINING PURPOSES ONLY!

The VSC will stop the system operation and the SYS INOP legend on the FAP
 it cuts the power to the vacuum generator if the altitude pressure switch comes on if the LLT indicates a full tank and the LLS does not.
gives a signal high (above 4877 m (16000 ft.)),
The VSC will stop the system operation and the SYS INOP legend on the FAP
 it examines for defects in the aircraft power supply 115 V/400 Hz, comes on if:
 it examines continuously the vacuum generator for overheat signals during  the LG falsely indicate GROUND (LG down and strut compressed),
the flush cycle if there is no 115 V/400 Hz defect.
 the service panel door falsely indicates door OPEN when the aircraft is in
The VSC calculates and transmits the signal to the FAP to show the level of flight.
the waste in the waste holding tank.

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WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

FORWARD ATTENDANT PANEL (FAP)

INDICATION ON
FAP EXCEPT A318
(NON ENHANCED
TECHNOLOGY)

VSC MOTOR
WASTE
SERVICE WASTE STARTING
PANEL LEVEL FAN RELAY
QUANTITY INDICATION FAULT 115V AC
INDICATOR CONTROL

CIDS NO WATER FLUSH CONTROL

FAULT WATER VALVE FAULT
DIRECTOR TOILET A FLUSH VALVE FAULT
UNIT
CONTROL UNIT FAULT TOILET A

NO WATER
FAULT
WATER VALVE FAULT
FLUSH CONTROL
CFDS ARINC 429 OTHER FLUSH VALVE FAULT UNITS
TOILETS CONTROL UNIT FAULT OTHER TOILETS
FOR TRAINING PURPOSES ONLY!

QUANTITY LEVEL TRANSMITTER

QUANTITY LEVEL SENSOR SERVICE

WASTE SERVICE
DOOR OPEN PANEL DOOR
RS-232−C INTERFACE TOILET SWITCH
SYSTEM
SERVICING
ALTITUDE
PRESSURE L/G DOWN
SWITCH
LGCIU
P OPTIONAL

Figure 55 Vacuum System Controller (All)

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WATER AND WASTE A318/319/A320/A321
TOILET SYSTEM
38−31

WASTE HOLDING TANK SYSTEM DESCRIPTION (ALL)

The waste holding tank is installed on the right of the aircraft under the floor
Waste Drain Valve 3340MM
between FR65 and FR68.
The tank has: The waste drain valve is installed in the waste holding tank drain line. It is a ball
type manually operated shutoff valve.
 a water separator,
 a liquid level transmitter,
Check Valve 3320MM (Vacuum pressure)
 a liquid level sensor,
The check valve is installed in the waste holding tank air outlet−line and parallel
 the waste inlets,
to the vacuum generator line. It lets air flow from the tank to the overboard vent
 a waste outlet, line and stops opposite airflow.
 two rinse connections.
The tank is a filament wound cylindrical vessel with a toilet waste capacity of Differential Pressure Transducer 42MG
170 l (45.0 USgal).
The differential pressure transducer is installed in the waste line downstream of
the flush valves, between the toilet and waste tank. The transducer is
Water Separator 3302MM connected electrically to the vacuum system controller. It measures the
differential pressure between the waste line and the cabin.
Liquid Level Transmitter 40MG
Altitude Pressure Switch 43MG
The LLT (Liquid Level Transmitter) is installed in the bottom of the waste
holding tank. It monitors the contents level in the waste holding tank and sends The altitude pressure switch is installed between FR71 and FR72. The switch
a analogous signal to the VSC (Vacuum System Controller). is connected electrically to the VSC (Vacuum System Controller).
It gives an electrical signal to the VSC which starts or stops the operation of
Liquid Level Sensor 41MG the vacuum generator.
The LLS (Liquid Level Sensor) is installed in the upper section of the waste
holding tank. It sends a signal to the VSC (Vacuum System Controller) when Check Valve 3322MM (tank rinse line)
the tank is full. The VSC prevents further toilet flush operation. The check valve is installed in the rinse line of the waste holding tank. It lets
FOR TRAINING PURPOSES ONLY!

water flow in one direction only.

Vacuum Generator 37MG
The vacuum generator is installed on the right of the aircraft under the floor
between FR68 and FR69. It is a self−contained centrifugal unit with thermal
overload protection. The generator air inlet is connected to the water−separator
air−outlet. The generator air outlet is connected to the aircraft overboard
ventilation. The generator gives the necessary differential pressure in the waste
tank to move the waste from the bowl to the tank. The vacuum generator is
electrically connected to the aircraft power−circuit.

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WATER AND WASTE A318/319/A320/A321
TOILET SYSTEM
38−31

(NON ENHANCED)

ALTITUDE
PRESSURE CHECK VALVE
Z170 SWITCH 3320MM
43MG

VACUUM GENERATOR
CHECK VALVE A 37MG
3322MM
WASTE HOLDING TANK
3300MM

WASTE
INLET

FR68

TANK DIFFERENTIAL
WATER SEPARATOR
DRAIN PRESSURE
3302MM
LINE
FOR TRAINING PURPOSES ONLY!

TRANSDUCER
42MG

FR65

LIQUID LEVEL
TRANSMITTER
40MG
LIQUID LEVEL
WASTE DRAIN SENSOR
VALVE 3340MM 41MG
Figure 56 Waste Holding Tank and Components (All)
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WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

TOILET SYSTEM SERVICING (ALL)

ATTENTION: The following example is for information only and without
obligation!

DRAIN, FLUSH AND FILLING PROCEDURE

System Drain
 Open the service panel access door.
− The service panel micro switch stops all toilet operations and the flush
signals are ignored. All toilets are disabled and the SYSTEM INOP light
on the forward attendant panel is switched on.
 Open the caps of the toilet drain connection and the fill and rinse
connection.
 Connect the drain hose to the toilet drain connector.
 Turn the lever (1) of the TACO valve flap to the OPEN position. TOILET
SERVICEPANEL
 Pull the drain valve control handle from the NORMAL to the DRAIN position.
LOCATION
 Connect the fill and rinse hose to the fill and rinse connection.

System Flush
 Flush the toilet system until it is clean.
− Water pressure 35 psi
− Water flow rate 38 I/min.
 Push the drain valve control handle to the NORMAL position.
 Turn the lever (2) to the closed position.
 To latch the TACO valve flap, hold the lever (2) in the CLOSED position and
momentarily push the lever (1) in the OPEN direction and then to the
FOR TRAINING PURPOSES ONLY!

direction opposite the OPEN arrow.

 Disconnect the drain hose.
System Fill
 Fill the waste holding tank with 13.5 l. of disinfectant fluid.
 Disconnect the fill and rinse hose.
 Close the caps of the drain and the fill and rinse connections and close the
access door.

Figure 57 Toilet Service Panel Location (All)

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WATER AND WASTE A318/319/320/321
TOILET SYSTEM
38−31

DRAIN VALVE
CONTROL HANDLE

3341MM

DRAIN
3338MM
CONNECTION

3345MM

FILL AND RINSE

FOR TRAINING PURPOSES ONLY!

CONNECTION
DOOR LIMIT
SWITCH

Figure 58 Toilet Service Panel (All)

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WATER AND WASTE A318/319/320/321
POTABLE enhanced
38−10

38−10 POTABLE
WATER SYSTEM PRESENTATION (ENHANCED)
Differences to Non-enhanced
The main difference is in the quantity indication.
On the enhanced A/C, the water quantity transmitter sends the information to a
DEU (Decoder/Encoder Unit) B which in turn interfaces with the active CIDS
(Cabin Intercommunication Data System) director. Potable water quantity is
displayed on the new FAP (Flight Attendant Panel).
The service door OPEN information is still sent to the FAP, but through a DEU
B and the active CIDS director.
ATTENTION: The A320 Water Tank is still located behind the FWD Cargo
Compartment.
The Tank Drain and Overflow valve is a separate panel on the
A320.
FOR TRAINING PURPOSES ONLY!

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WATER AND WASTE A318/319/320/321
POTABLE enhanced
38−10

FWD
LAVATORY
CIDS MIDDLE LINE
ETHERNET DIRECTOR 1 DEU B

HEATER FLIGHT ATTENDANT 2

PANEL (FAP)
TO AFT LAVATORIES
AND GALLEYS
TO FWD GALLEY CABIN
FLOOR
FROM BLEED
AIR SYSTEM RELIEF
(OR OPTIONAL FILTER VALVE
COMPRESSOR)
SHUTTLE WATER QTY
VALVE TRANSMITTER

TANK FULL SIGNAL

POTABLE
WATER
TANK

FILL/OVERFLOW
FOR TRAINING PURPOSES ONLY!

DRAIN VALVE
FWD
DRAIN DOOR LIMIT
VALVE GROUND SWITCH
AIR PRESS LIMIT
SWs
FWD WATER FWD DRAIN VALVE POTABLE WATER
DRAIN PANEL AIRCRAFT OPEN LIGHT SERVICE PANEL
SKIN FILL/DRAIN OVERFLOW TANK QUANTITY
CONTROL
CONTROL HANDLE FILL/DRAIN FULL INDICATOR
HANDLE
LIGHT
Figure 59 Potable Water System Basic Schematic (enhanced)
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WATER AND WASTE A318/319/320/321
TOILET SYSTEM enhanced
38−31

38−31 TOILET SYSTEM

PRESENTATION (ENHANCED)
TOILET SYSTEM DIFFERENCES TO NON-ENHANCED
Vacuum System Controller
On the A320, the VSC (Vacuum System Controller) controls and monitors the
vacuum system and sends information directly to the Forward Attendant Panel.
The VSC interfaces with other aircraft systems.

Cabin Intercommunication Data System

On the A318 or A/C with enhanced Technology, the VSC function is integrated
into the CIDS (Cabin Intercommunication Data System) director, the altitude
data come from CPC (Cabin Pressure Controller) via the SDAC (System Data
Acquisition Concentrator).
Door switch information is send to the CIDS director via DEU
(Decoder/Encoder Unit) B.
A new FAP (Flight Attendant Panel) displays information.

SYSTEM DESCRIPTION AND OPERATION

Waste system data is received by DEU−Bs and sent to the CIDS directors.
This system is controlled by the VSCF (Vacuum System Controller Function)
which is integrated inside the CIDS director.
The user interface and system display is on the FAP.
FOR TRAINING PURPOSES ONLY!

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WATER AND WASTE A318/319/320/321
TOILET SYSTEM enhanced
38−31

DEU B
CONNECTED MIDDLE LINE RS-232−C INTERFACE
DEU B DEU B
TO FWD LAV AFT LAVATORY UNITS
FLUSH
SWITCH FLUSH
CONTROL
UNIT
FLIGHT
ATTENDANT FROM POTABLE
PANEL (FAP) WATER SYSTEM
WATER FLUSH
ETHERNET VALVE VALVE
CABIN
FLOOR

CIDS
DIRECTOR 1
VSC FROM FWD
FUNCTION
LAVATORY
2 UNITS

WATER
CFDIU SEPARATOR

WASTE
LGCIU HOLDING LIQUID
LEVEL
TANK SENSOR
FOR TRAINING PURPOSES ONLY!

VACUUM
GENERATOR
CPC SDAC
ALTITUDE WASTE
RINSE
DATA DRAIN LIQUID LEVEL TRANSMITTER
CONNECTION
VALVE

AIRCRAFT TOILET SERVICE PANEL LIMIT SWITCH

SKIN CONTROL DRAIN WASTE QUANTITY OPTIONAL
HANDLE CONNECTION INDICATOR
Figure 60 Toilet System Schematic (enhanced)
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Lufthansa Technical Training
COMMUNICATIONS A318/319/320/321
CABIN INTERCOMMUNICATION DATA enhanced
SYSTEM (CIDS) 23−73

ATA 23 COMMUNICATIONS
23-73 CABIN INTERCOMMUNICATION
DATA SYSTEM (CIDS)
FAP INTRODUCTION (ENHANCED TECHNOLOGY)
FAP Water/Waste Page
The FAP WATER/WASTE page appears by selecting the dedicated key on the
tool bar.
It can also appear automatically when the water service door is open or when
there is a fault in the system. This page gives information about the water and
waste system.
The WATER/WASTE page has:
 On the aircraft symbol, the location of the lavatory is shown either activated
with a gray square or de−activated with an amber square and its associated
name. A lavatory is de−activated when the Flush Control Unit is inoperative.
An amber cross is displayed on the square in case of no communication
with the Flush Control Unit.
 A messages list box will be shown, if there are any messages for the
water/waste system.
 A potable water tank and a waste water tank symbol, which also display
liquid level as a percentage.
 A RESET WARN pushbutton to be used in the case of a rinse valve failure.
All visual warnings are reset by this button (ACP, AIP, and LAV CALL
FOR TRAINING PURPOSES ONLY!

LIGHT).

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COMMUNICATIONS A318/319/320/321
CABIN INTERCOMMUNICATION DATA enhanced
SYSTEM (CIDS) 23−73

SELECTED
QUANTITY
LAV A

MESSAGE
WASTE TANK NOT EMPTY: GROUND SERVICE REQUIRED

CHECK LAVATORY:
LAV A
FOR TRAINING PURPOSES ONLY!

SHUT OFF WATER SUPPLY:

LAV E LAV E

Figure 61 Water/Waste Page (All)

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WATER AND WASTE A318/319/320/321
TOILET SYSTEM enhanced
38−31

38−31 TOILET SYSTEM

TOILET SYSTEM BITE/TEST (ENHANCED TECHNOLOGY)
MCDU Toilet Pages
Selecting the TOILET line key on the SYSTEM REPORT/TEST page does not
give access to the TOILET SYSTEM page anymore.
This gives access to the CIDS 1 (or 2) TOILET SYStem page.
Available information is almost the same.
The LRU IDENTIFICATION page shows the CIDS director identification.
The new STATUS page displays the status of the toilet system.
FOR TRAINING PURPOSES ONLY!

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WATER AND WASTE A318/319/320/321
TOILET SYSTEM enhanced
38−31

NEXT
PAGE
STEP 1 STEP 2

   #     #   

    
      
    
 
   
   
   2A   
 ' 
      
 #    
      2B

2A 2B

 #    #  

  
    
%   (  
)  $ ( *
FOR TRAINING PURPOSES ONLY!

)    (

  
( $$$$$$$    (   
   ( 
 ( $$$$$$$    ( 


 ( $$$$$  %   ( 
 %   ( 
  (   ( $$$
 (     ( $$$
     

Figure 62 MCDU TOILET Page (Enhanced Technology)

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A318−21 38 B12

TABLE OF CONTENTS
ATA 38 WATER AND WASTE . . . . . . . . . . . . . . . 3 38−41 AIR SUPPLY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
WATER TANK PRESSURIZATION
38-00 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INTRODUCTION (ALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 COMPRESSED AIR LINE DESCRIPTION (A320) . . . . . 42
PANEL INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 6 COMPRESSED AIR LINE DESCRIPTION
(A318/319A321) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
WATER/WASTE GENERAL LAYOUT . . . . . . . . . . . . . . . . 10
38−42 AIR SUPPLY BOOST SYSTEM . . . . . . . . . . . . . . . . . . . . 46
38-10 POTABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INTRODUCTION (ALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
WATER SYSTEM GENERAL DESCRIPTION (A320) . . 12
AIR SUPPLY BOOST SYSTEM DESCRIPTION (A320) 48
WATER SYSTEM GENERAL (A318/319/321) . . . . . . . . . 14
COMPONENT PRESENTATION (A320) . . . . . . . . . . . . . 50
POTABLE WATER SYSTEM FILLING
PRESENTATION (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 38−42 AIR SUPPLY BOOST SYSTEM . . . . . . . . . . . . . . . . . . . . 52
POT. WATER SYST. FILL AIR SUPPLY BOOST SYSTEM
PRESENTATION (A318/319/321) . . . . . . . . . . . . . . . . . . . 18 DESCRIPTION (A318/319/321) . . . . . . . . . . . . . . . . . . . . . 52
POTABLE WATER SYSTEM DRAIN SYSTEM COMPONENTS
PRESENTATION (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 PRESENTATION (A318/319/321) . . . . . . . . . . . . . . . . . . . 54
POT. WATER SYST. DRAIN POWER SUPPLY OPERATION (ALL) . . . . . . . . . . . . . . . 56
PRESENTATION (A319/A321) . . . . . . . . . . . . . . . . . . . . . . 22
38−13 QUANTITY INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . 58
38−14 WATER DRAINING SYSTEM . . . . . . . . . . . . . . . . . . . . . . 24 SYSTEM DESCRIPTION (ALL) . . . . . . . . . . . . . . . . . . . . . 58
POTABLE WATER DRAIN SYSTEM PRESELECTION CNTRL. UNIT
DESCRIPTION (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 PRESENTATION (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . 60
WATER DRAINING −ELECTRICAL OPERATION (A320) 26
38−12 DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
POT. WATER DRAIN SYST.
DESCRIPTION (A318/319/321) . . . . . . . . . . . . . . . . . . . . . 28 PRESENTATION (ALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
WATER DRAIN−ELECTRICAL WATER HEATER DESCRIPTION (ALL) . . . . . . . . . . . . . . 64
OPERATION (A318/319/321) . . . . . . . . . . . . . . . . . . . . . . . 30 ELECTRICAL OPERATION (ALL) . . . . . . . . . . . . . . . . . . . 66
38−10 POTABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 38-32 WASTE WATER DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
POTABLE WATER SYSTEM OPERATION (A320) . . . . . 32 GENERAL (ALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
POTABLE WATER SYSTEM OPERATION
(A318/319/321) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
38-11 WATER STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ATA 30 ICE AND RAIN PROTECTION . . . . . . . . 70
WATER STORAGE FUNCTIONAL OPERATION (A320) 36
30-71 DRAIN MAST ICE PROTECTION . . . . . . . . . . . . . . . . . . . 70
WATER STORAGE FUNCTIONAL
OPERATION (A318/319/321) . . . . . . . . . . . . . . . . . . . . . . . 38 SYSTEM DESCRIPTION (ALL) . . . . . . . . . . . . . . . . . . . . . 70
30−73 POTABLE WATER ICE PROTECTION . . . . . . . . . . . . . . 72
PRESENTATION (ALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Page i
A318−21 38 B12

TABLE OF CONTENTS
30−71 DRAIN MAST ICE PROTECTION . . . . . . . . . . . . . . . . . . . 74 38−31 TOILET SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
WASTE WATER LINE HEATERS TOILET SYSTEM BITE/TEST
INTRODUCTION (A321) . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 (ENHANCED TECHNOLOGY) . . . . . . . . . . . . . . . . . . . . . . 104

ATA 23 COMMUNICATIONS . . . . . . . . . . . . . . . . 76
23-73 CABIN INTERCOMMUNICATION DATA
SYSTEM (CIDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
MISCELLANEOUS MODULE
INTRODUCTION (NON ENHANCED) . . . . . . . . . . . . . . . 76
PROGRAMMING & TEST PANEL
PRESENTATION (NON ENHANCED) . . . . . . . . . . . . . . . 78
CIDS SYSTEM STATUS FUNCTION (NON
ENHANCED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
38-31 TOILET SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 82
TOILET ASSY COMPONENT DESCRIPTION (ALL) . . . 84
WASTE LEVEL INDICATION (NON ENHANCED) . . . . . 86
VSC CFDS SYSTEM REPORT/TEST (ALL) . . . . . . . . . . 88
VACUUM SYSTEM CONTROLLER
FUNCTIONAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . 92
WASTE HOLDING TANK SYSTEM
DESCRIPTION (ALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
TOILET SYSTEM SERVICING (ALL) . . . . . . . . . . . . . . . . 96
38−10 POTABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
WATER SYSTEM PRESENTATION (ENHANCED) . . . . 98
38−31 TOILET SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
PRESENTATION (ENHANCED) . . . . . . . . . . . . . . . . . . . . 100

ATA 23 COMMUNICATIONS . . . . . . . . . . . . . . . . 102

23-73 CABIN INTERCOMMUNICATION DATA
SYSTEM (CIDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
FAP INTRODUCTION (ENHANCED TECHNOLOGY) . 102

Page ii
A318−21 38 B12

TABLE OF FIGURES
Figure 1 System Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 36 Water Faucets (All) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 2 Fwd Attendant Panel (A318−21) . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 37 Water Shutoff Valve and Water Heater (All) . . . . . . . . . . . . . . 65
Figure 3 Service Drain Panels Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 38 Water Heater (CONFIG 1) Elec. Schematic (All) . . . . . . . . . . 66
Figure 4 Service/Drain Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 39 Water Heater (CONFIG 2) Elec. Schematic (All) . . . . . . . . . . 67
Figure 5 Water & Waste Basic Schematic (A320) . . . . . . . . . . . . . . . . . . 11 Figure 40 Lav. Washbasin Waste-Water Drain (All) . . . . . . . . . . . . . . . . . 68
Figure 6 Water System Basic Schematic (A320) . . . . . . . . . . . . . . . . . . . 13 Figure 41 Water/Waste System Overview (All) . . . . . . . . . . . . . . . . . . . . . 69
Figure 7 A319/321 Water System Basic Schematic (A318/319/321) . . 15 Figure 42 Drain Mast Heating (All) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 8 Fill Position (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 43 Potable Water Heating, Ice Protection (All) . . . . . . . . . . . . . . . 72
Figure 9 Water Fill Schematic (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 44 Potable Water Ice Protection (All) . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 10 Schematic Water Fill (A318/319/321) . . . . . . . . . . . . . . . . . . . . 19 Figure 45 Water Drain Line Heating (A321) . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 11 Drain Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 46 Miscellaneous Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Figure 12 Water Drain Schematic (A320) . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 47 CIDS Programming and Test Panel . . . . . . . . . . . . . . . . . . . . . 79
Figure 13 Water Drain Schematic (A318/319/321) . . . . . . . . . . . . . . . . . . 23 Figure 48 System Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure 14 Water Draining Component Location (A320) . . . . . . . . . . . . . . 25 Figure 49 FCU Flush Cycle (All A/C)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure 15 Water Draining−Electrical Schematic (A320) . . . . . . . . . . . . . . 27 Figure 50 Toilet System Schematic (All A/C) . . . . . . . . . . . . . . . . . . . . . . 83
Figure 16 Water Draining Component Location (A318/319/321) . . . . . . 29 Figure 51 Toilet Assy (All) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Figure 17 Water Draining−Electrical Schematic (A318/319/321) . . . . . . 31 Figure 52 Waste Level Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 18 Potable Water System Basic Schematic (A320) . . . . . . . . . . . 33 Figure 53 CFDS System Report/Test VSC (1) (All) . . . . . . . . . . . . . . . . . 89
Figure 19 Potable Water System Basic Schematic (A318/319/321) . . . 35 Figure 54 CFDS System Report/Test VSC (2) (All) . . . . . . . . . . . . . . . . . 91
Figure 20 Potable Water Tank (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Figure 55 Vacuum System Controller (All) . . . . . . . . . . . . . . . . . . . . . . . . . 93
Figure 21 Potable Water Tank A318/319/321 . . . . . . . . . . . . . . . . . . . . . . 39 Figure 56 Waste Holding Tank and Components (All) . . . . . . . . . . . . . . . 95
Figure 22 Air Supply System (All) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Figure 57 Toilet Service Panel Location (All) . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 23 Air Supply System (A320) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Figure 58 Toilet Service Panel (All) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Figure 24 Potable Water Tank Location (A318/319/321) . . . . . . . . . . . . . 44 Figure 59 Potable Water System Basic Schematic (enhanced) . . . . . . . 99
Figure 25 Air Supply System (A318/319/321) . . . . . . . . . . . . . . . . . . . . . . 45 Figure 60 Toilet System Schematic (enhanced) . . . . . . . . . . . . . . . . . . . . 101
Figure 26 Air Supply Boost System (All) . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Figure 61 Water/Waste Page (All) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Figure 27 Air Supply Boost System (A320) . . . . . . . . . . . . . . . . . . . . . . . . 49 Figure 62 MCDU TOILET Page (Enhanced Technology) . . . . . . . . . . . . 105
Figure 28 Air Supply Boost System Components (A320) . . . . . . . . . . . . 51
Figure 29 Air Supply Boost System (A318/319/321) . . . . . . . . . . . . . . . . 53
Figure 30 Air Supply Boost System Components (A318/319/321) . . . . 55
Figure 31 Air Compressor Power Supply (All) . . . . . . . . . . . . . . . . . . . . . 57
Figure 32 Quantity Indication Components (All) . . . . . . . . . . . . . . . . . . . . 59
Figure 33 Preselection Control Unit (A320/A321) . . . . . . . . . . . . . . . . . . . 60
Figure 34 Quantity Indication Electrical Schematic (A318/320/321) . . . 61
Figure 35 FWD Lavatory and Galley System (A319−21) . . . . . . . . . . . . 62

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