Isolation Valve Figure 005
1EFF : 1 1R 1CES ALL 1 11 1 21-28-00 Page 15 Aug 01/05
Extraction Fan
Figure 006
1EFF : ALL 1 21-28-00 Page 16
1 1 Aug 01/05
1 1
1CES 1
**ON A/C 151-199,
(Ref. Fig. 003A)
R **ON A/C 401-499,
R (Ref. Fig. 003B)
**ON A/C ALL
A. Operation The extraction fan of the ventilation system for the AFT cargo compartment operates when the aircraft is on ground and in flight. The cargo ventilation controller 10HN opens the isolation valves 33HN and 34HN. After the ventilation controller receives fully open signals from both valves, it starts the extraction fan 35HN. The controller will close the isolation valves, and stop the extraction fan when:
-
the isolation valve switch 36HN is selected OFF,
-
the smoke detection control unit 10WQ detects smoke in the AFT cargo compartment (Ref. 26-16-00).
NOTE : In this case the isolation valves are closed/latched. Reopening is
____ only possible in the absence of a smoke signal by power interrupt.
-the cargo SMOKE TEST switch 13WH located in the overhead panel (22VU) is pressed.
NOTE : If the smoke test switch is pressed, the controller will receive
____ the test signal and the simulated smoke signal, the latter a few seconds later. In this case the isolation valves are closed but not latched. Reopening happens, if the SMOKE-signal is removed a few seconds earlier than the Test-signal, which is controlled by the smoke detection and control unit automatically.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
B. Control and Indication
(Ref. Fig. 001)
The AFT ISOL VALVE switch 36HN is installed on panel 22VU in the cockpit
overhead panel. It controls the isolation valves 33HN, 34HN and the
extraction fan 35HN. The cargo ventilation controller 10HN will only
start the fan if a fully open signal is received from both isolation
valves. With the isolation valve switch 36HN pressed-in, the isolation
valves 33HN and 34HN open fully and the extraction fan 35HN starts. With
the isolation valve switch pressed-out, OFF light comes on white, the
isolation valves close and the extraction fan stops. The FAULT light
comes on amber if either isolation valve is not fully open or fully
closed.
If there is an isolation valve disagree (not fully open or not fully
closed) the ventilation controller will also send a signal to the Flight
Warning Computer (FWC).
If there is an extraction fan fault, the ventilation controller gives a
signal to the FWC via the zone controller 8HK which generates the
appropriate failure message for the Centralized Fault-Display System
(CFDS) (Ref. 21-63-00 or 31-32-00).
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 AIR CONDITIONING 空调 2(103)