Strebel S-CB+400, Руководство по установке, эксплуатации и техническому обслуживанию

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9.7 Sensors
The following temperature sensors have been fitted in the boiler (S1 and S2 on the rear / right-side of the heat-
exchanger and one for each burner):
S1 = Flow temperature sensor (orange wire)
S2 = Return temperature sensor (green wire)
S3 = External flow temperature sensor
S4 = Calorifier/tank temperature sensor (if connected)
S5 = Outside temperature sensor (if connected)
S6 = Flue sensor (white wire)
(S3¹) = if terminals S3 are not connected, the average value of S1 top and S1 bottom is
taken and this value will be displayed.
The sensors used in the boilers are of the NTC (negative temperature coefficient) type and have the following
properties:
SENSOR SENSOR TYPE SENSOR VALUE
S1 Internal flow sensor NTC-10K-B3977
S2 Internal return sensor NTC-10K-B3977
S3 External flow sensor NTC-10K-B3977
S4 Calorifier/tank sensor NTC-10K-B3977
S5 Outdoor sensor NTC-12K-B3740
S6 Flue gas sensor NTC-10K-B3975
Conversion table temperature vs. resistance except outside sensor. NTC-10k B3977 (B3975)
Temperature
(°C)
Resistance
(Ω)
Temperature
(°C)
Resistance
(
Ω)
Temperature
(°C)
Resistance
(
Ω)
Temperature
(°C)
Resistance
(
Ω)
-30 175203 20 12488 70 1753 120 387
-25 129289 25 10000 75 1481 125 339
-20 96360 30 8059 80 1256 130 298
-15 72502 35 6535 85 1070 135 262
-10 55047 40 5330 90 915 140 232
-5 42158 45 4372 95 786 145 206
0 32555 50 3605 100 677 150 183
5 25339 55 2989 105 586 155 163
10 19873 60 2490 110 508 160 145
15 15699 65 2084 115 443 165 130
Conversion table temperature vs. resistance outside sensor. NTC-12k B3740
Temperature
(°C)
Resistance
(Ω)
Temperature
(°C)
Resistance
(
Ω)
-50 0 36130
-45 5 28600
-40 10 22800
-35 15 18300
-30 171800 20 14770
-25 129800 25 12000
-20 98930 30 9804
-15 76020 35 8054
-10 58880 40 6652
-5 45950 45 5522