-
the ECAM upper display unit,
The CIDS gives indications on:
-
the FWD attendant panel,
-
the area call panel.
R **ON A/C 106-149, 301-399, 401-499,
1. General
_______ (Ref. Fig. 001A) A smoke detection system is installed to detect smoke and/or fire in the lavatories. The lavatory smoke detectors are connected to the related DEU B via a CAN bus. The DEU B transmits the information to both CIDS channels. If smoke is detected, the system gives a visual and aural warning to the flight crew. This system is made-up of: - one smoke detector for each lavatory,
-a DEU B
-
the CIDS director (Cabin Intercommunication Data System), containing also
the CIDS-SDF (CIDS Smoke Detection Function) Smoke or fire in one of the lavatories causes a detector to signal this alarm condition to the CIDS director. This alarm condition is then forwarded to the CIDS-SDF which provides the information to the Flight Warning computer (FWC) The FWC gives indications on:
-
the ECAM upper display unit
The CIDS gives indications on:
-
the flight attendant panel
-
the area call panel
-
the attendant indication panel
Lavatory Smoke Detection
Figure 001
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1 1
26-17-00Page 3
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Lavatory Smoke Detection
Figure 001A
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2. Component Location
__________________
R **ON A/C 106-149, 301-399, 401-499,
2. Component Location
__________________
**ON A/C 151-199, 201-299,
2. Component Location
__________________
R **ON A/C 001-049, 051-099, 101-105,
R -------------------------------------------------------------------------------R FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA R | | | | DOOR | REF. R -------------------------------------------------------------------------------R 1WQ DET-SMOKE, LAVATORY A 221 831 26-17-00 R 4WQ DET-SMOKE, LAVATORY D 261 831 26-17-00 R 5WQ DET-SMOKE, LAVATORY E 262 831 26-17-00 R 10WQ SDCU 122 811 26-17-34
R **ON A/C 106-149,
R -------------------------------------------------------------------------------R FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA R | | | | DOOR | REF. R -------------------------------------------------------------------------------R 1WQ DET-SMOKE, LAVATORY A 221 26-17-15 R 4WQ DET-SMOKE, LAVATORY D 261 26-17-15 R 5WQ DET-SMOKE, LAVATORY E 262 26-17-15 R 8WQ SMOKE DET. DUCT LAV."H" FWD 230 26-17-15 R 10WQ SDCU 122 811 26-17-34R **ON A/C 151-199, 201-299,
R -------------------------------------------------------------------------------R FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA R | | | | DOOR | REF. R -------------------------------------------------------------------------------R 1WQ DET-SMOKE LAVATORY A 221 831 26-17-00 R 4WQ DET-SMOKE LAVATORY D 261 841 26-17-00 R 5WQ DET-SMOKE LAVATORY E 262 842 26-17-00 R 10WQ SDCU 122 811 26-17-34
R **ON A/C 301-399,
R -------------------------------------------------------------------------------R FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA R | | | | DOOR | REF. R -------------------------------------------------------------------------------R 1WQ DET-SMOKE, LAVATORY A 221 26-17-15 R 4WQ DET-SMOKE, LAVATORY D 261 26-17-15 R 5WQ DET-SMOKE, LAVATORY E 262 26-17-15 R 14WQ SMOKE DET. DUCT LAV."L" 251 26-17-15
R **ON A/C 401-499,
R -------------------------------------------------------------------------------R FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA R | | | | DOOR | REF. R -------------------------------------------------------------------------------R 1WQ DET-SMOKE, LAVATORY A 221 26-17-00 R 4WQ DET-SMOKE, LAVATORY D 261 26-17-00 R 5WQ DET-SMOKE, LAVATORY E 262 26-17-00
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3. Description
___________
A. Smoke Detectors (Ref. Fig. 002) The smoke detectors ionize the air particles that pass between their electrodes. As smoke has a higher specific gravity than air, it causes the electrical resistance of the circuit to increase. The current decreases and the voltage in the measurement chamber increases to a higher level than the reference chamber. At a set difference level the detector sends a signal. The reference chamber makes allowances for differential pressure. It makes sure that the detector operates on the ground and in flight within the same level of sensitivity.
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