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Functional principle
Several IR sensors are located behind the actuator plate of the WC flush control. These sensors scan
different detection ranges.
The user detection range (1) detects whether a user is sitting or standing in front of the WC flush control. No
objects (wall, curtain, etc.) should be permanently located in this area. If a seated user is detected, manual
flush actuation is deactivated. This prevents a flush from being inadvertently released if the user leans back
during use.
If the user's hand crosses the boundary of the detection range for manual flush detection (2), the WC flush
control releases a partial or full flush. Manual flush actuation is only possible when a person is in the
proximity detection range (3).
The proximity detection range (3) detects the area in front of the WC. As soon as a person enters this
detection range, the actuator buttons start to light up, thereby signalling that the WC flush control is ready for
operation.
Figure 1: Detection ranges
1
User detection range
2
Manual flush detection range
3
Proximity detection range
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