DOC AIRBUS | AMM A320FLAVATORY/GALLEY VENTILATION - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
A. Lavatory/Galley Ventilation
The lavatory/galley ventilation system makes sure that the lavatories and galleys have a flow of temperature controlled and conditioned air. Air flows from the cabin into the lavatories and galleys. Air also flows into the lavatories from the cabin air distribution and recirculation system through individual air outlets. The air flows from the lavatories and galleys into an extraction duct in the area of the outflow valve and then out of the aircraft. An extraction fan gives the necessary airflow.
The lavatory/galley ventilation system makes sure that the lavatories and galleys have a flow of temperature controlled and conditioned air. Air flows from the cabin into the lavatories and galleys. Air also flows into the lavatories from the cabin air distribution and recirculation system through individual air outlets. The air flows from the lavatories and galleys into an extraction duct in the area of the outflow valve and then out of the aircraft. An extraction fan gives the necessary airflow.
2. Component Location
Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL
Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C ALL | |||||
| 1HU | GALLEY & TOILET FAN | 162DW | 172 | 21-23-51 | |
3. System Description
Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL
Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL
Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL Lavatory and Galley Ventilation System ** ON A/C NOT FOR ALL A. Lavatory and Galley Air Supply
(1) Compartment Ventilation
The largest quantity of air for ventilation of the lavatories and galleys comes from the cabin. Extraction causes the air to flow from the cabin into the lavatories and galleys. The air flows into the lavatories through grilles in the door and into the galleys through grilles and filters which are installed in the galley walls and the ceiling.
The largest quantity of air for ventilation of the lavatories and galleys comes from the cabin. Extraction causes the air to flow from the cabin into the lavatories and galleys. The air flows into the lavatories through grilles in the door and into the galleys through grilles and filters which are installed in the galley walls and the ceiling.
(2) Individual Ventilation
A small quantity of air for ventilation of the lavatories flows from individual air outlets. Conditioned air from the cabin air distribution and recirculation system (Ref. AMM D/O 21-21-00-00) flows into the supply ducts of the lavatory/galley ventilation system. The supply ducts are installed in the ceiling area of the cabin. The air flows from the supply ducts into each lavatory through an individual air outlet. There are also supply ducts to the galleys. They are only connected where it is necessary for customer requirements.
A small quantity of air for ventilation of the lavatories flows from individual air outlets. Conditioned air from the cabin air distribution and recirculation system (Ref. AMM D/O 21-21-00-00) flows into the supply ducts of the lavatory/galley ventilation system. The supply ducts are installed in the ceiling area of the cabin. The air flows from the supply ducts into each lavatory through an individual air outlet. There are also supply ducts to the galleys. They are only connected where it is necessary for customer requirements.
B. Lavatory and Galley Extraction System
(1) Extraction Fan 1HU
The extraction fan 1HU removes air from the lavatories and the galleys through a duct which is installed above the cabin ceiling. The air flows through filters into the duct. This duct extends the length of the cabin from the FWD utility area to the left-hand AFT lavatory. The duct divides into two dropper ducts and follows the fuselage contour downwards (on each side of a window) to the fan. The air is then removed overboard through the outflow valve 10HL. The extraction fan operates continuously during flight and also on the ground when electrical power is available to the aircraft.
The extraction fan 1HU removes air from the lavatories and the galleys through a duct which is installed above the cabin ceiling. The air flows through filters into the duct. This duct extends the length of the cabin from the FWD utility area to the left-hand AFT lavatory. The duct divides into two dropper ducts and follows the fuselage contour downwards (on each side of a window) to the fan. The air is then removed overboard through the outflow valve 10HL. The extraction fan operates continuously during flight and also on the ground when electrical power is available to the aircraft.
(2) Extraction Ducts
The extraction ducts are made from resin and glassfiber laminate with metal sleeves bonded to each end for duct interconnection. All ducts are connected to each other by flexible bellows made of silicone laminate and glassfiber secured by clamps. Capped branches along the duct allow the installation of lavatories and galleys at different locations in the cabin. Flexible hoses from the extraction duct are connected to cabin temperature sensor-housings (Ref. 21-63-00).
The extraction ducts are made from resin and glassfiber laminate with metal sleeves bonded to each end for duct interconnection. All ducts are connected to each other by flexible bellows made of silicone laminate and glassfiber secured by clamps. Capped branches along the duct allow the installation of lavatories and galleys at different locations in the cabin. Flexible hoses from the extraction duct are connected to cabin temperature sensor-housings (Ref. 21-63-00).
C. System Performance (Flow Rates)
(1) Lavatory
The total flow rate for each lavatory is 12 l/s.
The total flow rate for each lavatory is 12 l/s.
(2) Cabin Temperature Sensor-Housing
The flow rate through each of the two cabin temperature sensor-housings is 3.5 l/s.
The flow rate through each of the two cabin temperature sensor-housings is 3.5 l/s.
(3) Galley
Galley sizes are determined by the electrical power (Kw) installed:
Galley sizes are determined by the electrical power (Kw) installed:
- small galley 0-7.0 Kw flow rate 25 l/s,
- normal galley 7 to 17.0 Kw flow rate 40 l/s,
- large galley > 17,0 Kw flow rate 50 l/s.
** ON A/C NOT FOR ALL
5. Interface
The lavatory and galley ventilation system has interfaces with the zone controller 8HK of the cockpit and the cabin temperature control-system (Ref. 21-63-00),
The lavatory and galley ventilation system has an interface with the air conditioning system controllers (ACSC) (Ref. AMM D/O 21-61-00-00).
** ON A/C NOT FOR ALL The lavatory and galley ventilation system has interfaces with the zone controller 8HK of the cockpit and the cabin temperature control-system (Ref. 21-63-00),
The lavatory and galley ventilation system has an interface with the air conditioning system controllers (ACSC) (Ref. AMM D/O 21-61-00-00).
A. Extraction Fan FIN: 1-HU
The lavatory and galley extraction fan 1HU is installed in line with the extraction duct. It is powered by a three-phase induction motor that drives a fan wheel which has high-efficiency blades. The fan operates continuously at about 11700 rpm. Thermo switches are installed inside the stators of the extraction fan. If the temperature of the stator increases to between 134 DEG.C (273.20 DEG.F) and 146 DEG.C (294.80 DEG.F), the thermo switches isolate the electrical supply to the fan.
The lavatory and galley extraction fan is secured by clamps to brackets on the aircraft structure in the rear underfloor area. Arrows on the fan casing show the direction of airflow through the fan and the direction that the impellor rotates.
The lavatory and galley extraction fan 1HU is installed in line with the extraction duct. It is powered by a three-phase induction motor that drives a fan wheel which has high-efficiency blades. The fan operates continuously at about 11700 rpm. Thermo switches are installed inside the stators of the extraction fan. If the temperature of the stator increases to between 134 DEG.C (273.20 DEG.F) and 146 DEG.C (294.80 DEG.F), the thermo switches isolate the electrical supply to the fan.
The lavatory and galley extraction fan is secured by clamps to brackets on the aircraft structure in the rear underfloor area. Arrows on the fan casing show the direction of airflow through the fan and the direction that the impellor rotates.
7. Operation/Control and Indicating
A. Operation of the Lavatory and Galley Extraction Fan
The lavatory and galley extraction fan 1HU operates continuously. 28 V DC from normal busbar 101PP through circuit breaker 5HU energizes the power relay 2HU. The power relay energizes the extraction fan with 115 V AC from normal busbar 101XP through circuit breaker 6HU. Thermo switches protect the fan from overheating. If the temperature of the stators increases to between 134 DEG.C (273.20 DEG.F) and 146 DEG.C (294.80 DEG.F), the ground is removed from the power relay.
The lavatory and galley extraction fan 1HU operates continuously. 28 V DC from normal busbar 101PP through circuit breaker 5HU energizes the power relay 2HU. The power relay energizes the extraction fan with 115 V AC from normal busbar 101XP through circuit breaker 6HU. Thermo switches protect the fan from overheating. If the temperature of the stators increases to between 134 DEG.C (273.20 DEG.F) and 146 DEG.C (294.80 DEG.F), the ground is removed from the power relay.
The lavatory and galley extraction fan 1HU operates continuously. 28 V DC from normal busbar 101PP through circuit breaker 5HU energizes the power relay 2HU. The power relay energizes the extraction fan with 115 V AC from normal busbar 101XP through circuit breaker 6HU. Thermo switches protect the fan from overheating. If the temperature of the stators increases to between 134 DEG.C (273.20 DEG.F) and 146 DEG.C (294.80 DEG.F), the ground is removed from the power relay.
The lavatory and galley extraction fan 1HU operates continuously. 28 V DC from normal busbar 101PP through circuit breaker 5HU energizes the power relay 2HU. The power relay energizes the extraction fan with 115 V AC from normal busbar 101XP through circuit breaker 6HU. Thermo switches protect the fan from overheating. If the temperature of the stators increases to between 134 DEG.C (273.20 DEG.F) and 146 DEG.C (294.80 DEG.F), the ground is removed from the power relay.
B. Control and Indication
The lavatory and galley extraction fan 1HU is continuously monitored by the zone controller 8HK of the cabin temperature control-system (Ref. AMM D/O 21-63-00-00).
If an overheat of the lavatory and galley extraction fan 1HU occurs, the thermo switches of the fan stop the electrical power supply through the power relay 2HU. The fan stops and the indicating relay 4HU opens. The indicating relay 4HU gives a signal to the zone controller 8HK (Ref. AMM D/O 21-63-00-00). The zone controller gives a signal to the Electronic Instrument System (EIS) (Ref. AMM D/O 31-60-00-00) and to the Centralized Fault-Display System (CFDS) (Ref. AMM D/O 31-30-00-00).
The lavatory and galley extraction fan 1HU is continuously monitored by the air conditioning system controllers (ACSC) 47HH (57HH) (Ref. AMM D/O 21-61-00-00).
If an overheat of the lavatory and galley extraction fan 1HU occurs, the thermo switches of the fan stop the electrical power supply through the power relay 2HU. The fan stops and the indicating relay 4HU opens. The indicating relay 4HU gives a signal to the ACSC 47HH (57HH) (Ref. AMM D/O 21-63-00-00). The ACSC gives a signal to the Electronic Instrument System (EIS) (Ref. AMM D/O 31-60-00-00) and to the Centralized Fault-Display System (CFDS) (Ref. AMM D/O 31-30-00-00).
The lavatory and galley extraction fan 1HU is continuously monitored by the zone controller 8HK of the cabin temperature control-system (Ref. AMM D/O 21-63-00-00).
If an overheat of the lavatory and galley extraction fan 1HU occurs, the thermo switches of the fan stop the electrical power supply through the power relay 2HU. The fan stops and the indicating relay 4HU opens. The indicating relay 4HU gives a signal to the zone controller 8HK (Ref. AMM D/O 21-63-00-00). The zone controller gives a signal to the Electronic Instrument System (EIS) (Ref. AMM D/O 31-60-00-00) and to the Centralized Fault-Display System (CFDS) (Ref. AMM D/O 31-30-00-00).
The lavatory and galley extraction fan 1HU is continuously monitored by the air conditioning system controllers (ACSC) 47HH (57HH) (Ref. AMM D/O 21-61-00-00).
If an overheat of the lavatory and galley extraction fan 1HU occurs, the thermo switches of the fan stop the electrical power supply through the power relay 2HU. The fan stops and the indicating relay 4HU opens. The indicating relay 4HU gives a signal to the ACSC 47HH (57HH) (Ref. AMM D/O 21-63-00-00). The ACSC gives a signal to the Electronic Instrument System (EIS) (Ref. AMM D/O 31-60-00-00) and to the Centralized Fault-Display System (CFDS) (Ref. AMM D/O 31-30-00-00).