DOC AIRBUS | AMM A320FWATER DRAINING (DUMP) - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The drain system gives the possibility to drain the water from the potable water system.
** ON A/C NOT FOR ALL The drain system gives the possibility to drain the water from the potable water system.
2. Component Location
** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C ALL | |||||
| 3MP | LIM SW-DRAIN HANDLE | 171 | 38-14-17 | ||
| 4MP | VALVE,DRAINAGE | 131HW | 133 | 38-14-41 | |
| ** ON A/C NOT FOR ALL | |||||
| 8MA | FILL/DRAIN VALVE | 161DW | 171 | 38-14-43 | |
| ** ON A/C NOT FOR ALL | |||||
| 8MP | VALVE-OVERFLOW | 132PW | 138 | 38-14-44 | |
| 14MP | VALVE-DRAIN | 132PW | 138 | 38-14-45 | |
| 16MA | FILL/DRAIN VALVE | 161DW | 171 | 38-14-46 | |
| ** ON A/C NOT FOR ALL | |||||
| 2023VU | CTL PNL-WATER QTY IND | 171 | 93-00-00 | ||
3. 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. Motorized drain valve 4MP drains the system's front section. Motorized fill/drain valve 16MA drains the system's rear section. Fill/drain control handle 3254MM which is located on potable-water service panel 2023VU opens fill/drain valve 16MA. Limit switch 3MP is energized to operate the related overflow and drain valves. Overflow valve 8MP opens to let air into the potable water tank.
Water Draining - Electrical Schematic ** ON A/C NOT FOR ALL
Water Draining - Electrical Schematic ** ON A/C NOT FOR ALL
Two drain valves and two drain ports are installed in the potable water system.
Fill/Overflow drain valve 8MA drains the rear section of the potable-water distribution system. Motorized drain valve 4MP drains the system's front section. The fill/drain control handle which is located on 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.
** ON A/C NOT FOR ALL 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. Motorized drain valve 4MP drains the system's front section. Motorized fill/drain valve 16MA drains the system's rear section. Fill/drain control handle 3254MM which is located on potable-water service panel 2023VU opens fill/drain valve 16MA. Limit switch 3MP is energized to operate the related overflow and drain valves. Overflow valve 8MP opens to let air into the potable water tank.
Water Draining - Electrical Schematic ** ON A/C NOT FOR ALL Water Draining - Electrical Schematic ** ON A/C NOT FOR ALL Fill/Overflow drain valve 8MA drains the rear section of the potable-water distribution system. Motorized drain valve 4MP drains the system's front section. The fill/drain control handle which is located on 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.
4. 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 limit switch 3MP. This limit switch energizes and moves motorized drain valve 4MP to the open position. Drain valve control-light 2MP, located on potable-water service panel 2023VU comes on, when motorized drain valve 4MP opens. The two valves close when the system is 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 located on the drain panel, opens the valve when you move it from SHUT to DRAIN.
You turn the control handle to DRAIN and pull it out to the stop. This opens fill/drain valve 16MA and closes limit switch 3MP. Motorized overflow valve 8MP and motorized drain valves 4MP and 14MP are energized and move to the open position. On potable-water service panel 2023VU, drain-valve control lights 2MP and 12MP and overflow-valve control light 6MP come on. When the system has drained, you push and turn the control handle to the NORMAL position. 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.
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 limit switch 3MP. This limit switch energizes and moves motorized drain valve 4MP to the open position. Drain valve control-light 2MP, located on potable-water service panel 2023VU comes on, when motorized drain valve 4MP opens. The two valves close when the system is 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 located on the drain panel, opens the valve when you move it from SHUT to DRAIN.
You turn the control handle to DRAIN and pull it out to the stop. This opens fill/drain valve 16MA and closes limit switch 3MP. Motorized overflow valve 8MP and motorized drain valves 4MP and 14MP are energized and move to the open position. On potable-water service panel 2023VU, drain-valve control lights 2MP and 12MP and overflow-valve control light 6MP come on. When the system has drained, you push and turn the control handle to the NORMAL position. 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.