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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) measures whether a user is sitting or standing in front of the WC flush control.
If the user's hand crosses the boundary of the manual flush detection range (2), the WC flush control
releases a partial or full flush. If the user's hand is held briefly in the detection range, the WC flush control
releases a full flush. If the user's hand is held for an extended time in the detection range, the WC flush
control releases a partial flush.
The proximity detection range (3) is active only in battery operation and is used for the purpose of energy
saving. The user detection range is activated as soon as there is a change in this area.
Figure 1: Detection ranges
1
User detection range
2
Manual flush actuation detection range
3
Proximity detection range
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