Bosch GWI-N Series Training And Service Information page 32

Operating
Temperature (ºC)
Table 17 – NTC resistance values for immerged water temperature NTC's (Optiflow)
Component
ID
Description
Ionization
1 Electrode
2 Combustion fan
Mechanically
7 modulated valve
(MV1)
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R min
(KΩ)
0 22.69
5 18.29
10
14.84
15
12.11
20
9.94
25
8.20
30
6.81
35
5.68
40
4.76
45
4.01
50
3.39
55
2.87
60
2.45
65
2.09
70
1.79
75
1.54
80
1.33
85
1.16
90
1.01
95
0.88
100
0.77
105
0.67
110
0.59
Measuring Wire
Colours
White wire to ionization
electrode
Brown-Blue GND
Orange-Blue GND
Yellow-Blue GND
Red-Red
6 720 814 719 SM FP_Australia 2017/04 EN
R nominal
R max (KΩ)
(KΩ)
23.73
19.09
15.45
12.58
10.31
8.49
7.03
5.86
4.90
4.12
3.48
2.95
2.52
2.15
1.85
1.59
1.38
1.20
1.04
0.91
0.80
0.70
0.62
Value
Multimeter in position for
current measurement, with
scale for µA range of values
Ionization current > 0.8 µA
~ 0 – 45 V
DC
~ 10.8 – 13.2 V
DC
DC~V
(pulse frequency ~ Hz)
~ 0 – 12 V
DC
Current = 0 – 220 mA
Resistance ~ 80 Ω
24.80
19.90
16.08
13.07
10.68
8.78
7.26
6.03
5.04
4.23
3.57
3.03
2.59
2.22
1.91
1.65
1.43
1.24
1.08
0.95
0.83
0.73
0.65
Remarks
Note: Cables
connected in serial
between ionization
cable from control
unit and electrode.
Supply power
Controlling power
Feedback from hall
sensor
Modulation Valve