DOC AIRBUS | AMM A320FWASTE WATER DRAIN - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The waste-water drain system discards the waste water from the lavatory washbasins and the galley sinks.
The system has:
** ON A/C NOT FOR ALL The waste-water drain system discards the waste water from the lavatory washbasins and the galley sinks.
The system has:
- Washbasin drain assemblies in the lavatories and galleys
- Drain valves in the sanitary unit cabinets
- Drain lines and the heated drain masts.
2. Component Location
Waste-Water Drain System - Component Location ** ON A/C NOT FOR ALL
Waste-Water Drain System - Component Location ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Waste-Water Drain System - Component Location ** ON A/C NOT FOR ALL Waste-Water Drain System - Component Location ** ON A/C NOT FOR ALL 3. Description
A. Drain Assembly
The lavatory washbasins have a drain valve assembly permanently open. This drain valve assembly has a valve body with drain connection. A hose connects the overflow at the top of the washbasin to the drain hose downstream of the drain valve assembly.
The lavatory washbasins have a drain valve assembly which is a selectable type. This drain valve assembly has a valve body with drain connection. A hose connects the overflow at the top of the washbasin to the drain hose downstream of the drain valve assembly. A control knob installed on the top of the washbasin table actuates the drain valve through a control rod system.
The lavatory washbasins have a drain valve assembly permanently open. This drain valve assembly has a valve body with drain connection. A hose connects the overflow at the top of the washbasin to the drain hose downstream of the drain valve assembly.
The lavatory washbasins have a drain valve assembly which is a selectable type. This drain valve assembly has a valve body with drain connection. A hose connects the overflow at the top of the washbasin to the drain hose downstream of the drain valve assembly. A control knob installed on the top of the washbasin table actuates the drain valve through a control rod system.
B. Drain Valve
The drain valves, 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 drain valves, 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.
C. Drainmast
The waste water is discarded to the atmosphere through the drain masts that are installed on the lower fuselage shell (Ref. AMM D/O 30-71-00-00). A mixture of cabin differential pressure and gravity moves the waste water to the drain masts. Each drain mast has a drain tube, integrated electrical heating-elements, and a flange for the installation of the drain mast.
The waste water is discarded to the atmosphere through the drain masts that are installed on the lower fuselage shell (Ref. AMM D/O 30-71-00-00). A mixture of cabin differential pressure and gravity moves the waste water to the drain masts. Each drain mast has a drain tube, integrated electrical heating-elements, and a flange for the installation of the drain mast.
4. Operation
A. Drain Assembly
The lavatory washbasins have a drain valve assembly (installed on the bottom of the bowl) for the drainage of the waste water. The drain valve has a valve body with the connection for the drain line. The sink overflow is connected to the drain line downstream of the drain valve assembly. The drain valve is permanently open, a plug (which is installed in the drain valve assembly) allows the waste water to drain when you pull it out.
The lavatory washbasins have a drain valve assembly (which is installed on the bottom of the bowl) for the drainage of the waste water. The drain valve has a valve body with the connection for the drain line. The sink overflow is connected to the drain line downstream of the drain valve assembly.
A control rod system connects a poppet to a control knob on the top of the washbasin table. You pull the knob out to close the valve and push it in to open the valve.
The lavatory washbasins have a drain valve assembly (installed on the bottom of the bowl) for the drainage of the waste water. The drain valve has a valve body with the connection for the drain line. The sink overflow is connected to the drain line downstream of the drain valve assembly. The drain valve is permanently open, a plug (which is installed in the drain valve assembly) allows the waste water to drain when you pull it out.
The lavatory washbasins have a drain valve assembly (which is installed on the bottom of the bowl) for the drainage of the waste water. The drain valve has a valve body with the connection for the drain line. The sink overflow is connected to the drain line downstream of the drain valve assembly.
A control rod system connects a poppet to a control knob on the top of the washbasin table. You pull the knob out to close the valve and push it in to open the valve.
B. Drain Valve
The drain valves, which are installed in the drain lines, open only when a certain amount of water is collected. This prevents a continuous leakage of cabin air.
The backflow prevention device which is integrated in the drain valves prevents backflow of water through the outlet side of the valves.
The drain valves, which are installed in the drain lines, open only when a certain amount of water is collected. This prevents a continuous leakage of cabin air.
The backflow prevention device which is integrated in the drain valves prevents backflow of water through the outlet side of the valves.
C. Drainmast (Heated) (Ref: 30-71-00)
During flight, the waste water is discarded through the drain masts because of the pressure difference between the cabin and the drain mast outlets. When the aircraft is on the ground, the waste water is discarded through the drain masts because of gravity. The drain masts have integrated electrical heating-elements that do not let the water freeze during high-altitude flights or cold weather. The heating elements are connected to the aircraft electrical network.
During flight, the waste water is discarded through the drain masts because of the pressure difference between the cabin and the drain mast outlets. When the aircraft is on the ground, the waste water is discarded through the drain masts because of gravity. The drain masts have integrated electrical heating-elements that do not let the water freeze during high-altitude flights or cold weather. The heating elements are connected to the aircraft electrical network.