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 eld 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
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