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Lavatory Lighted Signs - Schematic
Figure 002A (SHEET 2)
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R Lavatory Lighted Signs - Schematic
R Figure 002B (SHEET 1)
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R Lavatory Lighted Signs - Schematic
R Figure 002B (SHEET 2)
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1 1 Aug 01/05 1 1 1CES 1R Lavatory Lighted Signs - Schematic R Figure 002C
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A. Forward Lavatory Occupied-Sign The forward lavatory occupied-sign 3WJ shows the position of the forward lavatory and if it is occupied or not. The sign is installed in a position where it can be easily seen.
(1)
The 28VDC normal busbar 208PP energizes the sign through the circuit breaker 1WJ and the microswitch of the related lavatory. The microswitch is installed in the lavatory door frame.
(2)
With the lavatory door unlocked, the electrical supply flows through the related microswitch to the FREE terminal of the sign. The sign pictogram/legend comes on with a green color to show that the lavatory is not occupied.
(3)
When the door is closed and locked, the contacts of the related microswitch change over. This removes the supply from the FREE terminal of the sign and supplies it to the ENGAGED terminal. The sign pictogram/legend comes on with a red color to show that the lavatory is occupied. At the same time the relay 18LP energizes. The annunciator 6WJ in the cockpit comes on to show the flight crew that the forward lavatory is occupied.
**ON A/C 001-049, 051-099, 101-105,
B. Rear Lavatory Occupied-Signs (Ref. Fig. 002) The rear lavatory occupied-signs 13WJ and 14WJ show the positions of the two rear lavatories. They also show if the lavatories are occupied or not occupied. The signs are installed in a position where they can be easily seen.
(1)
The 28VDC busbar 208PP energizes the signs through the circuit breaker 11WJ and the related microswitches of the lavatories. One microswitch is installed in the door frame of each rear lavatory.
(2)
With the lavatory doors unlocked, the electrical supply flows through the lavatory microswitches to the FREE terminal of each sign. The sign pictogram/legends come on green to show that the lavatories are not occupied.
(3)
When the lavatory doors are closed and locked, the contacts of the microswitches change over and remove the electrical supply from the FREE terminal to the ENGAGED terminal of the related sign. The sign pictogram/legends change to red to show that the related lavatory is occupied.
**ON A/C 106-149, 151-199, 211-299,
B. Rear Lavatory Occupied-Signs (Ref. Fig. 002A) The rear lavatory occupied-signs 13WJ and 14WJ show the positions of the two rear lavatories. They also show if the lavatories are occupied or not occupied. The signs are installed in a position where they can be easily seen.
(1)
The 28VDC busbar 208PP energizes the signs through the circuit breaker 11WJ and the related microswitches of the lavatories D and E. The microswitch 2WJ4 is installed in the door frame of the lavatory D and the microswitch 2WJ5 is installed in the door frame of the lavatory E.
(2)
With the lavatory doors unlocked, the electrical supply flows through the lavatory microswitches to the FREE terminal of each sign. The sign pictogram/legends come on green to show that the lavatories are not occupied.
(3)
When the lavatory doors are closed and locked, the contacts of the microswitches change over and remove the electrical supply from the FREE terminal to the ENGAGED terminal of the related sign. The sign pictogram/legends change to red to show that the related lavatory is occupied.
**ON A/C 201-210,
B. Rear Lavatory Occupied-Signs (Ref. Fig. 002) The rear lavatory occupied-signs 13WJ and 14WJ show the positions of the two rear lavatories. They also show if the lavatories are occupied or not occupied. The signs are installed in a position where they can be easily seen.
(1)
The 28VDC busbar 208PP energizes the signs through the circuit breaker 11WJ and the related microswitches of the lavatories. One microswitch is installed in the door frame of each rear lavatory.
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