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an installation port for the water-contents quantity transmitter 3MA,
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a connection for fill/drain/distribution plumbing,
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a connection for air pressurization plumbing.
B. Fill/Drain Valve 16MA The fill/drain valve is installed below the cabin floor in Zone 171. The valve is attached to the outer left support strut at STA3158/FR66. Tube assemblies connect the valve to the potable water tank and to the potable water service-panel.The fill function of the valve also operates as a system drain facility. You can manually select the fill and drain facilities on the service panel.
R **ON A/C 151-199, 301-399, 401-499,
A. Water Tank 3000MM The potable water tank is made of Carbonfiber Reinforced Plastic (CFRP). It is strengthened to accept the rated pressure for the potable water system (Ref. AMM 38-41-00). The capacity of the tank is 200 l (53 USgal). The tank is attached to the aircraft structure with clamps. The tank has:
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an overflow port,
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an installation port for the fill/overflow drain valve and for draining,
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an installation port for the water-contents quantity transmitter 3MA,
-a connection for air pressurization system with an air-no-water valve.
B. Fill/Overflow Drain Valve 8MA The fill/overflow drain valve is installed between the water service panel and the potable water tank. Tube assemblies connect the valve to the tank and to the ports on the potable water service panel. The 'fill' function of the valve also operates as a system 'drain' facility. You can manually select the fill and drain facilities on the service panel. The overflow function operates as an overflow outlet and a vent for the tank. The operation of the fill/overflow drain handle opens the overflow port when it is selected to the 'FILL' or 'DRAIN' position.
R **ON A/C 001-049, 051-099, 101-149, 201-299,
C. Overflow Valve 8MP The overflow valve is installed below the cabin floor in the area of the potable water tank at STA1536/FR35. The fill and drain limit switches 3MP and 5MP which are installed on the potable water service-panel operate the valve.
**ON A/C ALL
5. Operation
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R **ON A/C 001-049, 051-099, 101-149, 201-299,
(Ref. Fig. 003)
A. Fill System (with Electrical Power) You fill the water tank when the fill/drain valve 16MA is open. The valve opens when you turn the control handle on the potable water service panel from 'NORMAL' to 'FILL' and pull the control handle out. With the control handle pulled out to its stop, the fill/drain valve 16MA opens. The limit switch 5MP is energized and opens the overflow/ventilation valve 8MP and the contol light 6MP comes on. The maximum pressure required to fill the tank is 50 psi (3.4 bar). When the tank is full, the quantity transmitter closes the fill/drain valve. The control handle is automatically pulled in and returns to the normal position. In this position the limit switch 5MP is de-energized and closes the motorized overflow/ventilation valve 8MP.
Potable Water System - Fill/Drain Procedures
Figure 003
R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 38-11-00Page 10 1 1 May 01/05 1 1 1CES 1R **ON A/C 151-199, 301-399, 401-499,
(Ref. Fig. 003A)
A. Fill System (with Electrical Power) You can only fill the water tank when the fill/overflow drain valve 8MA is open. The valve opens when you turn the control handle on the service panel from 'NORMAL' to 'FILL' and pull the control handle out. With the control handle pulled out to its stop, the 'fill-drain' and 'overflow' ducts open. The maximum pressure required to fill the tank is 50 psi (3.4 bar). When the tank is full, the quantity transmitter closes the fill/overflow drain valve. The control handle is automatically pulled in and returns to the 'NORMAL' position and the tank full control light comes on.
When you fill the system without electrical power, then there is no indication when the tank is full. The control handel will stay in the PULL TO FILL position. You must manually return the control handel to the NORMAL position to close the fill/overflow drain valve 8MA.
**ON A/C 001-049, 051-099, 101-149, 201-299,
6. Operation
_________
(Ref. Fig. 003)
A. Fill System (without Electrical Power) You can also fill the water tank when there is no electrical power.To do so you must open the fill/drain valve 16MA and the overflow valve 8MP manually. To open the fill/drain valve 16MA you turn the control handle on the potable water service panel from 'NORMAL' to 'FILL'.Then pull the control handle out to its stop. To open the overflow/ventilation valve 8MP you turn the control handle at the overflow and drain panel 192NB from 'SHUT' to 'OPEN'. There are no indications that the valves are open. The maximum pressure required to fill the tank is 50 psi (3.4 bar). When the tank is full, you must close the valves manually again. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM WATER/WASTE 1(29)
