Aquastop - Bosch WAT28400 Repair Instructions

Design and function
3.16

Aquastop

3.16.1 Structure
Fig. 22: Components of the Aquastop
1 Coarse filter
2 Fine filter
3 Screw connection
4 Flow limiter
5 Coil (valve)
In the screw connection (3), the coarse filter (1) and the fine filter (2) are arranged
consecutively. The flow limiter (4) is situated under the filters. The electromagnetic
valve, consisting of the coil (5) and the seal (7), is located behind. After the seal,
the water duct of the Aquastop leads out into the inlet hose (10). The Aquastop is
enclosed within a housing (6).
2017-05-22 / DIS 113_58300000186503_ara_en_c
6 Housing
7 Seal (valve)
8 Control lead
9 Leakage water hose
10 Inlet hose
Copyright by BSH Hausgeräte GmbH
The screw connection connects the Aquastop to the tap. The leakage water
hose (9) contains the control lead (8) and the inlet hose (10). The control lead (8)
connects the valve to the electronics.
3.16.2 Function
The Aquastop combines several functions:
The coarse filter and the fine filter filter particles out of the inflowing water and
prevent them from getting into the water circuit of the appliance.
The flow limiter reduces the flow cross-section of the water inlet depending on the
water pressure of the water connection.
The valve is an electromechanical safety valve. The valve coil is actuated by the
electronics. When voltage is applied to the coil, the water inlet seal is opened.
When the electronics switch off the voltage on the coil, the seal closes the water
inlet.
The leakage water hose feeds water into the base support which escapes in the
event of a malfunction in the area of the Aquastop or the inlet hose.
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