Checking The Domestic Hot Water; Mains Water Supply - Buderus 24C Servicing Manual

Troubleshooting
3.1.22 Checking the domestic hot water / mains water
supply
Disconnect the plug-and-socket connection on the hot-
water sensor cable (fig. 70, item 1) and/or the mains-water
sensor (fig. 70, item 2).
Measure resistance, take a temperature reading at the
thermal pressure gauge (tolerance ± 5 K) and compare
with the values listed in table 3. If there is any marked
mismatch, the hot-water sensor is defective.
If the hot-water/mains-water sensor is in order, plug it back
in.
Temperature [°C]
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Table 3 Resistance values for hot-water/mains-water sensor
(approximate values)
Subject to modifications resulting from technical improvements!
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
Resistance [Ω]
29490
23462
18787
15136
12268
10000
8197
6754
5594
4656
3893
3271
2760
2339
1990
1700
1458
1255
1084
939,6
817,2
Fig. 70 Checking the domestic hot water / mains water
supply
Buderus Ltd. • http://www.buderus-domestic.co.uk
3
2
1
57