DOC AIRBUS | AMM A320FDRAIN MAST ICE PROTECTION - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The waste-water ice protection is installed to prevent ice formation in the drain lines and the forward and aft drain masts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drain masts to atmosphere. The waste water lines, installed in the areas of possible icing conditions, are heated by the electrical tape heating-elements and insulated. The heaters are installed in the forward and aft drain masts to prevent ice formation.
Ice protection control-units, installed in the forward and aft cargo compartments, control the heating elements of the drain lines and the drain masts through the sensors.
The waste-water ice protection is installed to prevent ice formation in the forward and aft drain masts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drain masts to atmosphere.
Waste water lines installed in areas of possible icing conditions, are heated by electrical tape heating-elements and insulated. Heaters are installed in the forward and aft drain masts to prevent ice formation.
A heated and insulated drainage system is installed in the forward and aft cargo compartments to drain condensation which can cause corrosion and formation of ice.
Ice Protection control-units are installed in the forward and aft cargo compartments of the aircraft to regulate through the sensors the heating elements of the drain mast, waste water lines and the forward and aft-cargo compartment drainage-system.
The waste water ice-protection is installed to prevent ice formation in the drain lines, the forward and the aft drainmasts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drainmasts to the atmosphere.
The waste water lines installed in areas of possible icing conditions are heated by electrical tape heating-elements and are insulated. The heaters are installed in the forward and aft drainmasts to prevent ice formation.
A heated and insulated drainage system is installed in the forward and aft cargo compartments to drain condensation which can cause corrosion and the formation of ice.
The ice protection control-units are installed in the forward and aft cargo compartments of the aircraft. The ice protection control-units control the heating elements of the items that follow, through the sensors:
** ON A/C NOT FOR ALL The waste-water ice protection is installed to prevent ice formation in the drain lines and the forward and aft drain masts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drain masts to atmosphere. The waste water lines, installed in the areas of possible icing conditions, are heated by the electrical tape heating-elements and insulated. The heaters are installed in the forward and aft drain masts to prevent ice formation.
Ice protection control-units, installed in the forward and aft cargo compartments, control the heating elements of the drain lines and the drain masts through the sensors.
The waste-water ice protection is installed to prevent ice formation in the forward and aft drain masts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drain masts to atmosphere.
Waste water lines installed in areas of possible icing conditions, are heated by electrical tape heating-elements and insulated. Heaters are installed in the forward and aft drain masts to prevent ice formation.
A heated and insulated drainage system is installed in the forward and aft cargo compartments to drain condensation which can cause corrosion and formation of ice.
Ice Protection control-units are installed in the forward and aft cargo compartments of the aircraft to regulate through the sensors the heating elements of the drain mast, waste water lines and the forward and aft-cargo compartment drainage-system.
The waste water ice-protection is installed to prevent ice formation in the drain lines, the forward and the aft drainmasts. The waste water which comes from the galley and lavatory washbasins is discarded through the drain lines and the drainmasts to the atmosphere.
The waste water lines installed in areas of possible icing conditions are heated by electrical tape heating-elements and are insulated. The heaters are installed in the forward and aft drainmasts to prevent ice formation.
A heated and insulated drainage system is installed in the forward and aft cargo compartments to drain condensation which can cause corrosion and the formation of ice.
The ice protection control-units are installed in the forward and aft cargo compartments of the aircraft. The ice protection control-units control the heating elements of the items that follow, through the sensors:
- The drainmasts
- The waste water lines
- The forward and aft cargo-compartment drainage-systems.
2. Component Location
Waste-Water Ice-Protection - Component Location ** ON A/C NOT FOR ALL
Waste Water Ice Protection - Component Location ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Waste-Water Ice-Protection - Component Location ** ON A/C NOT FOR ALL Waste Water Ice Protection - Component Location ** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C ALL | |||||
| 4DU | DRAINMAST "F" | 133 | 30-71-51 | ||
| 5DU | CONTROL UNIT, WASTE WATER ICE PROTECTION- | 131 | 30-71-34 | ||
| 14DU | DRAINMAST "F" | 172 | 30-71-51 | ||
| 15DU | CONTROL UNIT, WASTE WATER ICE PROTECTION- | 162 | 30-71-34 | ||
| ** ON A/C NOT FOR ALL | |||||
| 24DU | DRAINMAST "F" | 153 | 30-71-51 | ||
| 25DU | CONTROL UNIT, WASTE WATER ICE PROTECTION- | 152 | 30-71-00 | ||
| ** ON A/C NOT FOR ALL | |||||
| 35DU | CONTROL UNIT, WASTE WATER ICE PROTECTION- | 162CW | 162 | 30-71-00 | |
| ** ON A/C NOT FOR ALL | |||||
| 33DW | CONTROL UNIT, POTABLE WATERICE PROTECTION- | 152FW | 152 | 30-73-35 | |
| ** ON A/C NOT FOR ALL | |||||
| 33DW | CONTROL UNIT, POTABLE WATERICE PROTECTION- | 152 | 30-73-35 | ||
| 40DU | SENSOR,TEMPERATURE- | 131 | 30-71-17 | ||
| 41DU | HEATER-TAPE, | 131 | 30-71-53 | ||
| 42DU | HEATER-TAPE, | 131 | 30-71-53 | ||
| ** ON A/C NOT FOR ALL | |||||
| 48DU | HEATER | 131 | 30-71-53 | ||
| 49DU | HEATER | 131 | 30-71-53 | ||
| ** ON A/C NOT FOR ALL | |||||
| 60DU | SENSOR-TEMP, WASTE WTR | 172 | 30-71-19 | ||
| ** ON A/C NOT FOR ALL | |||||
| 61DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-57 | ||
| ** ON A/C NOT FOR ALL | |||||
| 62DU | HEATER ELEMENT-AFT DRAINMAST PIPE HEATING | 172 | 30-71-57 | ||
| ** ON A/C NOT FOR ALL | |||||
| 63DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-00 | ||
| 64DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-00 | ||
| 65DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-00 | ||
| ** ON A/C NOT FOR ALL | |||||
| 70DU | SENSOR-TEMP, WASTE WTR | 172 | 30-71-18 | ||
| 71DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-58 | ||
| 72DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-58 | ||
| 73DU | HEATER-TAPE, WASTE WTR | 172 | 30-71-58 | ||
| ** ON A/C NOT FOR ALL | |||||
| 80DU | CONTROL UNIT, WASTE WATER ICE PROTECTION- | 152 | 30-71-00 | ||
| 85DU | SENSOR,TEMPERATURE- | 152 | 30-71-17 | ||
| 87DU | HEATER-TAPE, WASTE WTR | 152 | 30-71-53 | ||
| 88DU | HEATER-TAPE, WASTE WTR | 152 | 30-71-53 | ||
| 89DU | HEATER-TAPE, WASTE WTR | 152 | 30-71-53 | ||
| 90DU | HEATER-TAPE, WASTE WTR | 152 | 30-71-53 | ||
| ** ON A/C NOT FOR ALL | |||||
| 141DU | SENSOR,TEMPERATURE- | 131 | 30-71-17 | ||
| 142DU | HEATER-TAPE, WASTE WTR | 127 | 30-71-53 | ||
| ** ON A/C NOT FOR ALL | |||||
| 140DU | CONTROL UNIT, WASTE WATER ICE PROTECTION- | 132 | 30-71-00 | ||
| 146DU | HEATER-TAPE, | 127 | 30-71-53 | ||
| 147DU | HEATER-TAPE, | 127 | 30-71-53 | ||
3. System Description
A. Waste-Water Ice Protection
The waste water is discarded through the drain lines to heated forward drainmast 4DU and heated aft drainmast 14DU and then to the atmosphere. The two drainmasts are installed on the lower fuselage shell.
The waste water moves to the drainmasts because of gravity and the differential pressure during flight.
Each drainmast assembly has:
The drainmast heating element operates from -55 deg.C (-67 deg.F) to +75 deg.C (167 deg.F).
The overtemperature switch installed in the drainmast stops the power supply if the temperature is more than 90 DEG.C (194 DEG.F).
The waste-water drain lines of the drainmasts have heater assemblies which are installed on the drain lines with bonding tape.
The drain lines are installed on the supports and are tightened with the clamps and have an insulation as a cover.
Ice-protection control unit 140DU controls two heater circuits of the forward drainmast:
Each heater has:
The rear galley and the rear lavatory waste-water drain lines do not have heater assemblies installed.
The waste water is discarded through the drain lines to the forward heated drain mast 4DU and the rear heated drain mast 14DU to atmosphere, which are installed on the lower fuselage shell.
The waste water is moved to the drain masts through gravity on the ground and differential pressure in flight.
Each drain mast assembly has:
The waste water is moved to the drain masts through gravity on the ground and differential pressure in flight.
Each drain mast assembly has:
The waste-water is moved to the drain masts through gravity on the ground and differential pressure in the flight.
Each drain mast assembly has:
The drain-mast heating-element operates from -55 DEG.C (-67 DEG.F) to 75 DEG.C (167 DEG.F).
The overtemperature switch installed in the drain mast stops the power supply if the temperature is more than 90 DEG.C (194 DEG.F).
The waste-water drain lines in the drain masts have heater assemblies which are installed on the drain lines with the bonding tape.
The drain lines are installed on the supports and tightened with clamps and have an insulation.
The ice-protection control-unit 140DU controls two heater circuits of the forward drain mast.
Each heater has:
The waste water is discarded through the drain lines to forward heated drain-mast 4DU and aft heated drain-mast 14DU to atmosphere, which are installed on the lower fuselage shell.
The waste water is moved to the drain masts through gravity on the ground and differential pressure in flight.
Each drain mast assembly has:
The drain mast heating-element operates from -55 deg C (-67 deg F) to +75 deg C (+167 deg F).
The overtemperature switch installed in the drain mast will stop the power supply if the temperature increases above +120 deg C (+248 deg F).
The waste water drain-lines to the drain masts have heater assemblies which are installed on the drain lines with bonding tape.
The drain lines are installed on supports and tightened with clamps and covered with insulation.
Ice-protection control-unit 140DU controls two heater circuit to the forward drain mast.
Heater I/II circuit and related sensor 141DU controls the drain line heaters 142DU, 146DU and 147DU.
Ice-protection control-unit 35DU controls two heater circuit to the aft drain mast:
Each heater has:
The waste water is discarded through the drain lines to heated forward drainmast 4DU and heated aft drainmast 14DU and then to the atmosphere. The two drainmasts are installed on the lower fuselage shell.
The waste water moves to the drainmasts because of gravity and the differential pressure during flight.
Each drainmast assembly has:
- An aluminum alloy housing (aerodynamic shape)
- A drain tube with integrated electrical heating-elements
- A Positive Temperature Coefficient (PTC) temperature sensor (that measures the ambient temperature)
- An overtemperature switch (that prevents damage to the heating element)
- A flange for the installation of the drainmast (that is part of the top of the fairing).
The drainmast heating element operates from -55 deg.C (-67 deg.F) to +75 deg.C (167 deg.F).
The overtemperature switch installed in the drainmast stops the power supply if the temperature is more than 90 DEG.C (194 DEG.F).
The waste-water drain lines of the drainmasts have heater assemblies which are installed on the drain lines with bonding tape.
The drain lines are installed on the supports and are tightened with the clamps and have an insulation as a cover.
Ice-protection control unit 140DU controls two heater circuits of the forward drainmast:
- Heater circuits I and II and related sensor 141DU control drain line heaters 142DU, 146DU and 147DU.
Each heater has:
- A self-limiting element
- Two power supply connections
- An inner insulation
- A copper shield (ground bonding connection)
- An outer protection sheath.
- A ceramic and epoxy housing
- A sensing chip (that contains a thermistor)
- Two connection pins.
The rear galley and the rear lavatory waste-water drain lines do not have heater assemblies installed.
The waste water is discarded through the drain lines to the forward heated drain mast 4DU and the rear heated drain mast 14DU to atmosphere, which are installed on the lower fuselage shell.
The waste water is moved to the drain masts through gravity on the ground and differential pressure in flight.
Each drain mast assembly has:
- An aluminum alloy housing (aerodynamic shape)
- A drain tube with integrated electrical heating-elements
- A PTC temperature sensor (measures the ambient temperature)
- An over temperature switch (prevents damage to heating element)
- A flange for installation of the drain mast is part of the top of the fairing.
Two ice protection control units 5DU and 15DU control the 115 V AC 400Hz single Phase to the related heater of the drain masts.
The drain mast heating element operates from -55 deg C (-65 deg F) to +75 deg C (+160 deg F).
The overtemperature switch installed in the drain mast will stop the power supply if the temperature increases above +120 deg C (+250 deg F).
The waste water drain lines to the drain masts have heater assemblies which are installed on the drain lines with bonding tape.
The drain lines are installed on supports and tightened with clamps and covered with insulation.
Ice protection control unit 3DW and related sensor control the drain line heaters to the drain mast, keeping the temperature of the drain tube between +6 deg C (+43 deg F) to +10 deg C (+50 deg F).
The rear vacuum tank flush line have electrical tape heating elements installed on to the flush line with bonding tape and covered with insulation.
A control unit 35DU and related sensor are used to regulate the heating of the heaters installed on the rear vacuum tank flush lines to keep the temperature of the flush tube between +10 deg C (+50 deg F) to +15 deg C (+60 deg F).
Each heater has: - A self limiting element
- Two power supply conections
- An inner insulation
- A copper shield (ground bonding connection)
- An outer protection sheath.
Each sensor has: - A ceramic and epoxit housing
- A sensing chip (contains a thermistor)
- Two connection pins.
The value of the thermister depends on the set temperature of the waste water lines.
The waste water is moved to the drain masts through gravity on the ground and differential pressure in flight.
Each drain mast assembly has:
- An aluminum alloy housing (aerodynamic shape)
- A drain tube with integrated electrical heating-elements
- A PTC temperature sensor (measures the ambient temperature)
- An overtemperature switch (prevents damage to heating element).
A flange for installation of the drain mast is part of the top of the fairing.
Two ice protection control-units, 5DU and 15DU, control 115 V AC 400Hz single phase to the related heater of the drain masts.
Drain mast heating-element operates from -55 deg C (-65 deg F) to +75 deg C (+160 deg F).
The overtemperature switch installed in the drain mast will stop the power supply if the temperature increases above +120 deg C (+250 deg F).
The waste water drain-lines to the drain masts have heater assemblies which are installed on the drain lines with bonding tape.
The drain lines are installed on supports and tightened with clamps and have an insulation.
Ice protection control-unit 3DW and related sensor 141DU control drain line heaters 142DU, 48DU and 49DU to the forward drain mast. These components keep the temperature of the drain line between +6 deg C (+43 deg F) to +10 deg C (+50 deg F).
Ice protection control-unit 35DU controls the two heater circuits to the aft drain mast:
Heater I circuit and related sensor 60DU control drain line heaters 61DU and 62DU.
Heater III circuit and related sensor 70DU control drain line heaters 71DU, 72DU and 73DU.
The heaters keep the temperature of the drain line between +6 deg C (+43 deg F) to +10 deg C (+50 deg F).
Each heater has: - A self-limiting element
- Two power supply conections
- An inner insulation
- A copper shield (ground bonding connection)
- An outer protection sheath.
Each sensor has: - A ceramic and epoxy housing
- A sensing chip (contains a thermistor)
- Two connection pins.
The value of the thermistor is related to the set temperature of the waste-water lines.
The waste-water is moved to the drain masts through gravity on the ground and differential pressure in the flight.
Each drain mast assembly has:
- An aluminum alloy housing (aerodynamic shape)
- A drain tube with an integrated electrical heating-elements
- A PTC temperature sensor (measures the ambient temperature)
- An overtemperature switch (prevents damage to the heating element)
- A flange for the installation of the drain mast (is a part of the top of the fairing).
The drain-mast heating-element operates from -55 DEG.C (-67 DEG.F) to 75 DEG.C (167 DEG.F).
The overtemperature switch installed in the drain mast stops the power supply if the temperature is more than 90 DEG.C (194 DEG.F).
The waste-water drain lines in the drain masts have heater assemblies which are installed on the drain lines with the bonding tape.
The drain lines are installed on the supports and tightened with clamps and have an insulation.
The ice-protection control-unit 140DU controls two heater circuits of the forward drain mast.
- Heaters I and II circuit and the related sensor 141DU control the drain line heaters 142DU, 146DU and 147DU.
- Heater I circuit and the related sensor 60DU control the drain line heaters 61DU and 62DU.
- Heater III circuit and the related sensor 70DU control the drain line heaters 71DU, 72DU and 73DU.
Each heater has:
- A self-limiting element
- Two power supply connections
- An inner insulation
- A copper shield (bonding connection)
- An outer protection sheath.
- A ceramic and epoxy housing
- A sensing chip (contains a thermistor)
- Two connection pins.
The waste water is discarded through the drain lines to forward heated drain-mast 4DU and aft heated drain-mast 14DU to atmosphere, which are installed on the lower fuselage shell.
The waste water is moved to the drain masts through gravity on the ground and differential pressure in flight.
Each drain mast assembly has:
- An aluminum alloy housing (aerodynamic shape)
- A drain tube with integrated electrical heating-elements
- An PTC temperature sensor (measures the ambient temperature)
- An overtemperature switch (prevents damage to heating element)
- A flange for installation of the drain mast is part of the top of the fairing.
The drain mast heating-element operates from -55 deg C (-67 deg F) to +75 deg C (+167 deg F).
The overtemperature switch installed in the drain mast will stop the power supply if the temperature increases above +120 deg C (+248 deg F).
The waste water drain-lines to the drain masts have heater assemblies which are installed on the drain lines with bonding tape.
The drain lines are installed on supports and tightened with clamps and covered with insulation.
Ice-protection control-unit 140DU controls two heater circuit to the forward drain mast.
Heater I/II circuit and related sensor 141DU controls the drain line heaters 142DU, 146DU and 147DU.
Ice-protection control-unit 35DU controls two heater circuit to the aft drain mast:
- Heater I circuit and related sensor 60DU control the drain line heaters 61DU, 63DU, 64DU and 65DU.
- Heater III circuit and related sensor 70DU control the drain line heaters 71DU, 72DU and 73DU.
Each heater has:
- A self limiting element
- Two power supply conections
- An inner insulation
- A copper shield (ground bonding connection)
- An outer protection sheath.
- A ceramic and epoxit housing
- A sensing chip (contains a thermistor)
- Two connection pins.
4. Operation/Control and Indicating
The waste water ice protection system cannot be controlled manually.
The waste water ice protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 11DU and 31DU.
115 V AC is supplied from the normal busbar 110XP-B to the control unit 5DU which controls the heater of drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control unit 15DU which controls the heater of drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-C through the closed circuit breaker 1DW to the control unit 3DW.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 2DW to the control unit 3DW.
Control unit 3DW controls the related sensor and heaters installed on the drain lines to the drain masts.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to the control unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 10DU to the control unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the flush line of the rear vacuum tank.
The sensor measures the temperature of the waste water drain lines permamently, the control unit compares the measured values with the stored reference values. When icing conditions occure the control unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
The waste-water ice-protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 8DU, 9DU, 11DU, 31DU, 32DW.
115 V AC is supplied from the normal busbar 110XP-B to the control-unit 5DU which controls the heater of the forward drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control-unit 15DU which controls the heater of the aft drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to the control-unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 32DW to the control-unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the drain line of the aft drain mast.
115 V AC is supplied from the GND/FLT busbar 212XP-c through the closed circuit breaker 8DU to the control-unit 140DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 9DU to the control-unit 140DU.
Control unit 140DU controls the related sensor and heaters installed on the drain line of the fwd drain mast.
The sensor measures the temperature of the waste water drain lines permamently, the control-unit compares the measured values with the stored reference values. When icing conditions occure the control-unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
It operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through closed circuit breakers 1DU, 8DU, 9DU, 10DU, 11DU, 21DU, 22DU, 31DU and 32DW.
115 V AC is supplied from normal busbar 1 110XP-B through closed circuit breaker 1DU to control unit 5DU which controls the heater of forward drain mast 4DU.
115 V AC is supplied from normal busbar 2 210XP-C through closed circuit breaker 11DU to control unit 15DU which controls the heater of aft drain mast 14DU.
115 V AC is supplied from GND/FLT busbar 212XP-B through closed circuit breaker 21DU to control unit 25DU which controls the heater of mid drain mast 24DU.
115 V AC is supplied from GND/FLT busbar 212XP-B through closed circuit breaker 22DU to control unit 80DU.
28 V DC is supplied from GND/FLT busbar 602PP through closed circuit breaker 10DU to control unit 80DU.
115 V AC is supplied from GND/FLT busbar 212XP-C through closed circuit breaker 8DU to control unit 140DU.
28 V DC is supplied from GND/FLT busbar 602PP through closed circuit breaker 9DU to control unit 140DU.
115 V AC is supplied from GND/FLT busbar 212XP-A through closed circuit breaker 31DU to control unit 35DU.
28 V DC is supplied from GND/FLT busbar 602PP through closed circuit breaker 32DW to control unit 35DU.
Control units 140DU, 80DU and 35DU control the related sensors and heaters installed on the drain line of the drain masts. The sensor measures permanently the temperature of the waste-water drain lines, the control unit compares the measured values with the stored reference values. When icing conditions occur, the control unit will start the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
It operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical circuits and through the closed circuit breakers 1DU, 8DU, 9DU and 11DU.
115 V AC is supplied from the normal busbar 110XP-B to the control unit 5DU which controls the heater of the forward drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control unit 15DU which controls the heater of the aft drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-C through the closed circuit breaker 8DU to the control unit 140DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 9DU to the control unit 140DU.
The control unit 140DU controls the related sensor and heaters installed on the drain line of the forward drain mast.
The sensor continuously measures the temperature of the waste-water drain lines and the control unit compares the measured values with the stored reference values. When icing conditions occur, the control unit starts the power supply to the tape heating circuits.
A test button installed on top of the control unit, when pushed, will start an internal BITE test to do a check of the system.
Two light-emitting diodes (LED) in the control units 5DU and 15DU show the correct status of the systems as "Heater OK" and "Unit OK".
Two light-emitting diodes (LED) in the control unit 140DU show the correct status of the system as "Heater OK".
Drainmast Ice Protection - Electrical Schematic ** ON A/C NOT FOR ALL
Drain Mast Ice-Protection - Electrical Schematic ** ON A/C NOT FOR ALL
The waste water ice protection system cannot be controlled manually.
The waste water ice protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 11DU and 31DU.
115 V AC is supplied from the normal busbar 110XP-B to the control unit 5DU which controls the heater of drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control unit 15DU which controls the heater of drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-C through the closed circuit breaker 1DW to the control unit 3DW.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 2DW to the control unit 3DW.
Control unit 3DW controls the related sensor and heaters installed on the drain lines to the drain masts.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to the control unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 32DW to the control unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the flush line of the rear vacuum tank.
The sensor measures the temperature of the waste water drain lines permamently, the control unit compares the measured values with the stored reference values. When icing conditions occure the control unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
The waste-water ice-protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through closed circuit breakers 1DU, 11DU and 31DU.
115 V AC is supplied from the normal busbar 110XP-B to control unit 5DU which controls the heater of drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to control unit 15DU which controls the heater of drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to control unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 32DW to the control unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the flush line of the rear vacuum tank.
The sensor measures the temperature of the waste-water drain lines permanently, the control unit compares the measured values with the reference values. When icing conditions occur, the control unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
It operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 8DU, 9DU, 11DU, 31DU and 32DW.
115VAC is supplied from normal busbar I 110XP-B through the closed circuit breaker 1DU to control unit 5DU which controls the heater of forward drain mast 4DU.
115VAC is supplied from normal busbar II 210XP-C through the closed circuit breaker 11DU to control unit 15DU which controls the heater of aft drain mast 14DU.
115VAC is supplied from GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to control unit 35DU.
28VDC is supplied from GND/FLT busbar 602PP through the closed circuit breaker 32DW to control unit 35DU.
Control unit 35DU controls the related sensors and the heaters installed on the drain line of the aft drain mast.
115VAC is supplied from GND/FLT busbar 212XP-C through the closed circuit breaker 8DU to control unit 140DU.
28VDC is supplied from GND/FLT busbar 602PP through the closed circuit breaker 9DU to control unit 140DU.
Control unit 140DU controls the related sensor and the heaters installed on the drain line of the forward drain mast.
The sensor continuously measures the temperature of the waste-water drain lines and the control unit compares the measured values with the stored reference values. When icing conditions occur, the control unit will start the power supply to the tape heating circuits.
A test button is installed on the top of the control unit. When it is pushed, it will start an internal BITE test to do a check of the system.
Two Light-Emitting Diodes (LEDs) in control units 5DU and 15DU show the correct status of the systems as "Heater OK" and "Unit OK".
Two Light-Emitting Diodes (LEDs) in control units 140DU and 35DU show the correct status of the system as "Heater OK".
** ON A/C NOT FOR ALL The waste water ice protection system cannot be controlled manually.
The waste water ice protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 11DU and 31DU.
115 V AC is supplied from the normal busbar 110XP-B to the control unit 5DU which controls the heater of drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control unit 15DU which controls the heater of drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-C through the closed circuit breaker 1DW to the control unit 3DW.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 2DW to the control unit 3DW.
Control unit 3DW controls the related sensor and heaters installed on the drain lines to the drain masts.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to the control unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 10DU to the control unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the flush line of the rear vacuum tank.
The sensor measures the temperature of the waste water drain lines permamently, the control unit compares the measured values with the stored reference values. When icing conditions occure the control unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
The waste-water ice-protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 8DU, 9DU, 11DU, 31DU, 32DW.
115 V AC is supplied from the normal busbar 110XP-B to the control-unit 5DU which controls the heater of the forward drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control-unit 15DU which controls the heater of the aft drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to the control-unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 32DW to the control-unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the drain line of the aft drain mast.
115 V AC is supplied from the GND/FLT busbar 212XP-c through the closed circuit breaker 8DU to the control-unit 140DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 9DU to the control-unit 140DU.
Control unit 140DU controls the related sensor and heaters installed on the drain line of the fwd drain mast.
The sensor measures the temperature of the waste water drain lines permamently, the control-unit compares the measured values with the stored reference values. When icing conditions occure the control-unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
It operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through closed circuit breakers 1DU, 8DU, 9DU, 10DU, 11DU, 21DU, 22DU, 31DU and 32DW.
115 V AC is supplied from normal busbar 1 110XP-B through closed circuit breaker 1DU to control unit 5DU which controls the heater of forward drain mast 4DU.
115 V AC is supplied from normal busbar 2 210XP-C through closed circuit breaker 11DU to control unit 15DU which controls the heater of aft drain mast 14DU.
115 V AC is supplied from GND/FLT busbar 212XP-B through closed circuit breaker 21DU to control unit 25DU which controls the heater of mid drain mast 24DU.
115 V AC is supplied from GND/FLT busbar 212XP-B through closed circuit breaker 22DU to control unit 80DU.
28 V DC is supplied from GND/FLT busbar 602PP through closed circuit breaker 10DU to control unit 80DU.
115 V AC is supplied from GND/FLT busbar 212XP-C through closed circuit breaker 8DU to control unit 140DU.
28 V DC is supplied from GND/FLT busbar 602PP through closed circuit breaker 9DU to control unit 140DU.
115 V AC is supplied from GND/FLT busbar 212XP-A through closed circuit breaker 31DU to control unit 35DU.
28 V DC is supplied from GND/FLT busbar 602PP through closed circuit breaker 32DW to control unit 35DU.
Control units 140DU, 80DU and 35DU control the related sensors and heaters installed on the drain line of the drain masts. The sensor measures permanently the temperature of the waste-water drain lines, the control unit compares the measured values with the stored reference values. When icing conditions occur, the control unit will start the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
It operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical circuits and through the closed circuit breakers 1DU, 8DU, 9DU and 11DU.
115 V AC is supplied from the normal busbar 110XP-B to the control unit 5DU which controls the heater of the forward drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control unit 15DU which controls the heater of the aft drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-C through the closed circuit breaker 8DU to the control unit 140DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 9DU to the control unit 140DU.
The control unit 140DU controls the related sensor and heaters installed on the drain line of the forward drain mast.
The sensor continuously measures the temperature of the waste-water drain lines and the control unit compares the measured values with the stored reference values. When icing conditions occur, the control unit starts the power supply to the tape heating circuits.
A test button installed on top of the control unit, when pushed, will start an internal BITE test to do a check of the system.
Two light-emitting diodes (LED) in the control units 5DU and 15DU show the correct status of the systems as "Heater OK" and "Unit OK".
Two light-emitting diodes (LED) in the control unit 140DU show the correct status of the system as "Heater OK".
Drainmast Ice Protection - Electrical Schematic ** ON A/C NOT FOR ALL Drain Mast Ice-Protection - Electrical Schematic ** ON A/C NOT FOR ALL The waste water ice protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 11DU and 31DU.
115 V AC is supplied from the normal busbar 110XP-B to the control unit 5DU which controls the heater of drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to the control unit 15DU which controls the heater of drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-C through the closed circuit breaker 1DW to the control unit 3DW.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 2DW to the control unit 3DW.
Control unit 3DW controls the related sensor and heaters installed on the drain lines to the drain masts.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to the control unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 32DW to the control unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the flush line of the rear vacuum tank.
The sensor measures the temperature of the waste water drain lines permamently, the control unit compares the measured values with the stored reference values. When icing conditions occure the control unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
The waste-water ice-protection system operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through closed circuit breakers 1DU, 11DU and 31DU.
115 V AC is supplied from the normal busbar 110XP-B to control unit 5DU which controls the heater of drain mast 4DU.
115 V AC is supplied from the GND/FLT busbar 210XP-C to control unit 15DU which controls the heater of drain mast 14DU.
115 V AC is supplied from the GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to control unit 35DU.
28 V DC is supplied from the GND/FLT busbar 602PP through the closed circuit breaker 32DW to the control unit 35DU.
Control unit 35DU controls the related sensor and heaters installed on the flush line of the rear vacuum tank.
The sensor measures the temperature of the waste-water drain lines permanently, the control unit compares the measured values with the reference values. When icing conditions occur, the control unit will turn on the power supply to the tape heating circuits.
The waste-water ice-protection system cannot be controlled manually.
It operates automatically when the related circuit breakers are closed. The system is available with the energized aircraft electrical-circuits and through the closed circuit breakers 1DU, 8DU, 9DU, 11DU, 31DU and 32DW.
115VAC is supplied from normal busbar I 110XP-B through the closed circuit breaker 1DU to control unit 5DU which controls the heater of forward drain mast 4DU.
115VAC is supplied from normal busbar II 210XP-C through the closed circuit breaker 11DU to control unit 15DU which controls the heater of aft drain mast 14DU.
115VAC is supplied from GND/FLT busbar 212XP-A through the closed circuit breaker 31DU to control unit 35DU.
28VDC is supplied from GND/FLT busbar 602PP through the closed circuit breaker 32DW to control unit 35DU.
Control unit 35DU controls the related sensors and the heaters installed on the drain line of the aft drain mast.
115VAC is supplied from GND/FLT busbar 212XP-C through the closed circuit breaker 8DU to control unit 140DU.
28VDC is supplied from GND/FLT busbar 602PP through the closed circuit breaker 9DU to control unit 140DU.
Control unit 140DU controls the related sensor and the heaters installed on the drain line of the forward drain mast.
The sensor continuously measures the temperature of the waste-water drain lines and the control unit compares the measured values with the stored reference values. When icing conditions occur, the control unit will start the power supply to the tape heating circuits.
A test button is installed on the top of the control unit. When it is pushed, it will start an internal BITE test to do a check of the system.
Two Light-Emitting Diodes (LEDs) in control units 5DU and 15DU show the correct status of the systems as "Heater OK" and "Unit OK".
Two Light-Emitting Diodes (LEDs) in control units 140DU and 35DU show the correct status of the system as "Heater OK".
5. Test
A. BITE Test
All control units of the waste-water ice-protection system are given with an internal BITE test.
The BITE test function monitors the correct functions of:
Two Light Emitting Diodes (LEDs) show the correct status of the system.
The control units of the drain mast heating system are connected with three discrete lines to the Cabin Intercommunication Data System (CIDS), through a DEU-B.
There is a test menu shown on the CIDS Programming and Test Panel (PTP). This lets you start the BITE test of the drain mast heating system. As a result, you must not remove the sidewall panels installed in the forward and aft cargo compartments.
When you start the test through the PTP, a 28VDC signal starts the internal BITE test function of the related control units.
Two LED GND signals, 'HEATER OK' and 'UNIT OK', show the correct status of the drain mast heating system.
All control units of the waste-water ice-protection system have an internal BITE test.
The BITE test function monitors the correct function of:
Two LEDs show the correct status of the system.
The control units of the drainmast heating system are connected with three discrete lines to the Cabin Intercommunication Data System (CIDS) through a DEU-B.
A test menu, shown on the Multipurpose Control & Display Unit (MCDU), lets you start a test of the drainmast heating system with no removal of the sidewall panels from the forward and aft cargo compartments.
When you start the test through the MCDU, a 28VDC signal starts the internal BITE-test function of the related control units. After approximately 120 seconds, the message 'NO FAULT DETECTED' comes into view and shows the correct status of the drainmast heating system.
All control units of the waste-water ice-protection system are given with an internal BITE test.
The BITE test function monitors the correct functions of:
- The control and monitor circuits
- The connected heater elements (tapes)
- The connected temperature sensor
- The internal solid states relays
- The power supply of the system
- The interface connector.
Two Light Emitting Diodes (LEDs) show the correct status of the system.
The control units of the drain mast heating system are connected with three discrete lines to the Cabin Intercommunication Data System (CIDS), through a DEU-B.
There is a test menu shown on the CIDS Programming and Test Panel (PTP). This lets you start the BITE test of the drain mast heating system. As a result, you must not remove the sidewall panels installed in the forward and aft cargo compartments.
When you start the test through the PTP, a 28VDC signal starts the internal BITE test function of the related control units.
Two LED GND signals, 'HEATER OK' and 'UNIT OK', show the correct status of the drain mast heating system.
All control units of the waste-water ice-protection system have an internal BITE test.
The BITE test function monitors the correct function of:
- The control and monitor circuits
- The connected heater elements (tapes)
- The connected temperature sensors
- The internal solid-state relays
- The power supply of the system
- The interface connector.
Two LEDs show the correct status of the system.
The control units of the drainmast heating system are connected with three discrete lines to the Cabin Intercommunication Data System (CIDS) through a DEU-B.
A test menu, shown on the Multipurpose Control & Display Unit (MCDU), lets you start a test of the drainmast heating system with no removal of the sidewall panels from the forward and aft cargo compartments.
When you start the test through the MCDU, a 28VDC signal starts the internal BITE-test function of the related control units. After approximately 120 seconds, the message 'NO FAULT DETECTED' comes into view and shows the correct status of the drainmast heating system.
B. Power-up Tests Initialization and Cockpit Repercussions
(1) Conditions for power-up test initialization:
- De-energization time of computer: 1 s.
- A/C configuration:
-The A/C configuration is on ground.
(2) Process of power-up tests:
- Duration: 10 s.
- Cockpit repercussions directly linked to the power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be disregarded):
-None.
(3) Results of power-up tests
(cockpit repercussions, if any, in case of tests passed / tests failed):
(cockpit repercussions, if any, in case of tests passed / tests failed):
(a) Tests passed:
-None.
-None.
(b) Tests failed:
-None.
-None.
NOTE: The results of the tests are shown on the CIDS Programming and Test Panel:
-"DRAIN MAST TEST OK" if tests passed
-"DRAIN MAST UNIT FWD (AFT) FAIL" if tests failed
-"DRAIN MAST HEATER FWD (AFT) FAIL" if tests failed.
-"DRAIN MAST TEST OK" if tests passed
-"DRAIN MAST UNIT FWD (AFT) FAIL" if tests failed
-"DRAIN MAST HEATER FWD (AFT) FAIL" if tests failed.
(4) (1) The conditions of power-up test initialization are:
(a) De-energization time of computer: 1 second.
(b) Aircraft configuration:
• All aircraft configuration is on ground.
(a) De-energization time of computer: 1 second.
(b) Aircraft configuration:
• All aircraft configuration is on ground.
(5) The procedure of the power-up tests:
(a) Duration: 10 seconds.
(b) Cockpit repercussions directly connected to the power-up test accomplishment (some other repercussions can occur in relation to the aircraft configuration, but you can ignore those).
None.
(a) Duration: 10 seconds.
(b) Cockpit repercussions directly connected to the power-up test accomplishment (some other repercussions can occur in relation to the aircraft configuration, but you can ignore those).
None.
(6) Results of power-up tests
(cockpit repercussions, if occurred, in case of tests passed / tests failed):
(cockpit repercussions, if occurred, in case of tests passed / tests failed):
(a) Tests passed:
None.
None.
(b) Tests failed:
None.
None.
NOTE: The results of the tests are shown in the cockpit, on the MCDU, on the SYSTEM TEST menu page:
- "NO FAULT DETECTED" if tests passed
- "DRAINMAST UNIT x (x=FWD or AFT)" if tests failed
- "DRAINMAST HEATER x (x=FWD or AFT)" if tests failed.
(7) Conditions of power-up test initialization
- De-energization time of computer: 1 s.
- A/C configaration:
-whatever the A/C configuration is on ground
(8) Prozess of power-up tests
- Duration: 10 s
- Cockpit repercussions directly linked to power-up test accomplishment(some other repercussions may occur depending on the A/C configuration but these can be disregarded):
-none.
(9) Results of power-up tests
(cockpit repercussions, if any, in case of tests passed / tests failed).
(cockpit repercussions, if any, in case of tests passed / tests failed).
(a) Tests passed:
-none.
-none.
(b) Tests failed:
-none
-none
NOTE: The results of the tests are displayed on the PTP located on the CIDS panel.
-"DRAIN MAST TEST OK" if tests passed
-"DRAIN MAST UNIT FWD (MID, AFT) FAIL" if tests failed
-"DRAIN MAST HEATER FWD (MID, AFT) FAIL" if tests failed
-"DRAIN MAST TEST OK" if tests passed
-"DRAIN MAST UNIT FWD (MID, AFT) FAIL" if tests failed
-"DRAIN MAST HEATER FWD (MID, AFT) FAIL" if tests failed
(10) The conditions of the power-up test initialization are as follows:
- De-energization time of the computer: 1 s
- Aircraft configuration:
All aircraft configurations on ground.
(11) Procedure of the power-up tests:
- Duration: 10 s
- Cockpit repercussions directly related to the completed power-up test (some other repercussions can occur in relation to the aircraft configuration but you can ignore them):
None.
(12) Results of the power-up tests
(if cockpit repercussions occur for satisfactory results of the tests / unsatisfactory results of the tests):
(if cockpit repercussions occur for satisfactory results of the tests / unsatisfactory results of the tests):
(a) Satisfactory results of the tests:
None
None
(b) Unsatisfactory results of the tests:
None.
None.
NOTE: The results of the tests are shown in the cockpit, on the MCDU, on the SYSTEM TEST menu page:
-"DRAIN MAST TEST OK" if the results of the tests are satisfactory
-"DRAIN MAST UNIT FWD (MID, AFT) FAIL" if the results of the tests are unsatisfactory
-"DRAIN MAST HEATER FWD (MID, AFT) FAIL" if the results of the tests are unsatisfactory.
-"DRAIN MAST TEST OK" if the results of the tests are satisfactory
-"DRAIN MAST UNIT FWD (MID, AFT) FAIL" if the results of the tests are unsatisfactory
-"DRAIN MAST HEATER FWD (MID, AFT) FAIL" if the results of the tests are unsatisfactory.