Buderus 600 - 11S Installation And Maintenance Instructions Manual page 52

5 Servicing
5.3.17 Checking the hot water / boiler sensor
Disconnect the plug-and-socket connection on the hot
water sensor cable (fig. 73, item 1) and/or the boilersensor
(fig. 73, item 2).
Measure resistance, take a temperature reading at the
thermal pressure gauge (tolerance ± 5 K) and compare
with the values listed in table 8. If there is any marked
mismatch, the hot-water sensor is defective.
If the hot water / boiler 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 8 Resistance values for hot water / boiler sensor
(approximate values)
Outside temperature sensor
(°C)
25
20
15
10
5
0
-5
-10
-15
-20
10,000 20,000
Fig. 75 Outside temperature sensor diagram
Buderus • http://www.buderus-domestic.co.uk
52 Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Resistance [Ω]
29,490.0
23,462.0
18,787.0
15,136.0
12,268.0
10,000.0
8,197.0
6,754.0
5,594.0
4,656.0
3,893.0
3,271.0
2,760.0
2,339.0
1,990.0
1,700.0
1,458.0
1,255.0
1,084.0
1,939.6
1,817.2
30,000 40,000 50,000
Fig. 73 Checking the hot water / boiler sensor
Fig. 74 Boiler temperature sensor diagram
60,000 70,000 80,000
Subject to modifications resulting from technical improvements!
1
R (Ω)
2