Bosch WTD 15-4 AME 23 - Water Flow Sensor

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4.10 Water Flow Sensor
Water flow is measured by a turbine flow sensor that is fed by a DC signal of 5 V, and
gives a proportional feedback to the measured water flow.
- Flow rate to operate the appliance: 2.8 l/min
- Flow rate to shut off the appliance: 2.4 l/min
Water flow characteristic curve formula： f = 6.9 x Q
Note:
f is output frequency (Hz)
Q is water flow rate (L/min)
Flow (L/min)
Frequency (Hz）
15
103.5
14
96.6
13
89.7
12
82.8
11
75.9
10
69
9
62.1
8
55.2
7
48.3
6
41.4
5
34.5
4
27.6
3
20.7
2
13.8
Table 8 – Water flow sensor values
Pict.27 –Water Flow Sensor
In case Q > 2.8l/min following P
out
verification occurs:
- If P
out
> Minimum Power, the appliance will run with the calculated minimum water
flow, in order to reach the set point with a temperature stability of + / - 1ºC;