5-5
TROUBLESHOOTING
HC SERIES BOILERS
HC 13-50, HC 23-84, HC 29-106, HC 20-125, HC 33-160
5.2.9 DHW Tank Sensor
The DC and HC Series boilers allow the use of a tank sensor for controlling the
domestic hot water tank temperature. IBC Indirect water tanks come with a 10KΩ
sensor. An Aquastat may also be used.
If a field supplied domestic hot water sensor is used, it must be a 10KΩ sensor
matching the following table.
TEMPERATURE
RESISTANCE
TEMPERATURE
RESISTANCE
°F
°C
Ω
°F
°C
Ω
0
-18
85,362
100
38
5,828
5
-15
72,918
105
41
5,210
10
-12
62,465
110
43
4,665
15
-9
53,658
115
46
4,184
20
-7
42,218
120
49
3,760
25
-4
39,913
125
52
3,383
30
-1
34,558
130
54
3,050
35
2
29,996
135
57
2,754
40
4
26,099
140
60
2,490
45
7
22,763
145
63
2,255
50
10
19,900
150
66
2,045
55
13
17,436
155
68
1,857
60
16
15,311
160
71
1,689
65
18
13,474
165
74
1,538
70
21
11,883
170
77
1,403
75
24
10,501
175
79
1,281
80
27
9,299
180
82
1,172
85
29
8,250
185
85
1,073
90
32
7,334
190
88
983
95
35
6,532
195
91
903
Temperature Sensor resistance values – 10KΩ sensor
