DOC AIRBUS | AMM A320FDISTRIBUTION - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The distribution system delivers conditioned air to the pressurized fuselage.
** ON A/C NOT FOR ALL The distribution system delivers conditioned air to the pressurized fuselage.
2. System Description
The air distribution system has the subsequent subsystems:
The air distribution system has the subsequent subsystems:
- cabin air distribution and recirculation (Ref. AMM D/O 21-21-00-00),
- cockpit air ventilation (Ref. AMM D/O 21-21-00-00),
- lavatory/galley ventilation (Ref. AMM D/O 21-23-00-00),
- individual air distribution (Ref. AMM D/O 21-24-00-00),
- avionics equipment ventilation (Ref. AMM D/O 21-26-00-00),
- cabin air distribution and recirculation (Ref. AMM D/O 21-21-00-00),
- cockpit air ventilation (Ref. AMM D/O 21-21-00-00),
- lavatory/galley ventilation (Ref. AMM D/O 21-23-00-00),
- individual air distribution (Ref. AMM D/O 21-24-00-00),
- avionics equipment ventilation (Ref. AMM D/O 21-26-00-00),
- cargo compartment ventilation (Ref. AMM D/O 21-28-00-00).
A. Cabin Air Distribution and Recirculation
The cabin air distribution system supplies conditioned air to the cabin and to the cockpit. Cockpit and cabin main supply ducts come from the mixer unit, which is central element of the distribution system.
In the mixer unit the fresh air from the air conditioning packs is mixed with a part of the exhaust air of the cabin and the underfloor area. This recirculated air is drawn by recirculation fans through recirculation filters to the mixer unit.
The cabin air distribution system supplies conditioned air to the cabin and to the cockpit. Cockpit and cabin main supply ducts come from the mixer unit, which is central element of the distribution system.
In the mixer unit the fresh air from the air conditioning packs is mixed with a part of the exhaust air of the cabin and the underfloor area. This recirculated air is drawn by recirculation fans through recirculation filters to the mixer unit.
B. Cockpit Air Ventilation
The cockpit-air ventilation system supplies temperature controlled and conditioned air to the cockpit. The airflow comes from the cabin air distribution system from the mixer unit in a separate duct. The air flows from air outlets and individual air outlets into the cockpit.
The cockpit-air ventilation system supplies temperature controlled and conditioned air to the cockpit. The airflow comes from the cabin air distribution system from the mixer unit in a separate duct. The air flows from air outlets and individual air outlets into the cockpit.
C. Lavatory/Galley Ventilation
The lavatory/galley ventilation system supplies the lavatories and galleys with sufficient 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 supplies the lavatories and galleys with sufficient 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.
D. Individual Air Distribution
The individual air distribution system supplies temperature controlled and conditioned air from the cabin distribution and recirculation system to each passenger through individual air outlets.
The individual air distribution system supplies temperature controlled and conditioned air from the cabin distribution and recirculation system to each passenger through individual air outlets.
E. Avionics-Equipment Ventilation System
The avionics equipment ventilation system makes sure that the avionics racks have a good flow of air for cooling. It operates in different configurations. These configurations are dependent on the ambient temperature, whether the aircraft is on ground, in flight or a system failure exists.
The avionics equipment ventilation system makes sure that the avionics racks have a good flow of air for cooling. It operates in different configurations. These configurations are dependent on the ambient temperature, whether the aircraft is on ground, in flight or a system failure exists.
F. Cargo Compartment Ventilation
Cabin air is drawn into the cargo compartment through ducts which are installed in the lower fuselage. Outlets along the compartment left-hand sidewall direct the air towards the cargo floor area. The air is extracted from the compartment through outlets which are located near the compartment ceiling. An extraction fan gives the necessary air flow.
Cabin air is drawn into the cargo compartment through ducts which are installed in the lower fuselage. Outlets along the compartment left-hand sidewall direct the air towards the cargo floor area. The air is extracted from the compartment through outlets which are located near the compartment ceiling. An extraction fan gives the necessary air flow.