(2)
The repellent fluid is stored in the pressurized rain repellent container which is replaced when empty. The container is connected through a shutoff valve to a fluid reservoir, mounted below the container. The reservoir contains a float lever indicator for checking the repellent fluid in the container.
(3)
The rain repellent is propelled on the windows by the pressure of the fluid container. This pressure is checked by a pressure gage below the reservoir.
(4)
Aluminum tubing feeds rain repellent from the pressure gage, along the flight compartment sidewall, to a T-connection behind the pilot's instrument panel. The T-connection distributes repellent to each windshields rain repellent valve. A tube leads from each valve to the spray nozzle. The spray nozzles are below the No. 1 windows, inboard of the windshield wipers.
(5)
Pushing a window's RAIN REPELLENT button allows 28-volts dc to activate its rain repellent valve. This causes repellent to flow to the spray nozzles, and onto the windows. A time delay circuit in the valve controls the amount of repellent by closing the valve after 0.4 second.
(6)
Each tube to the spray nozzles is joined by an air hose. Engine bleed air prevents clogging of the tubes and spray nozzles by repellent.
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(7) Check valves are used to prevent presurized rain repellent fluid from entering the air tubes.
B. Control
(1)
To operate the system, supply electrical power to main ac buses (AMM 24-22-00/201).
(2)
Check that the RAIN REPEL R and RAIN REPEL L circuit breakers on overhead circuit breaker panel P11 are closed.
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757 FAULT ISOLATION/MAINT MANUAL
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本文链接地址：757 AMM 飞机维护手册 防冰和排雨 CHAPTER 30 - ICE AND RAIN PROTECTION(153)
