Temp. °F/°C
Resist.
Ω – Ohm
Temp. °F/°C
Resist.
Ω – Ohm
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 / 35 7,334 190 / 88 983
95 / 35 6,532 195 / 91 903
Table 12 Temperature sensor resistance values - 10K ohms
8.1.2 Fan
The fan is controlled via the SIM+ control. The SIM+ provides electronic commutating power to the
fan motor coilers determining the fan speed and power usage.
8.1.3 Water pressure sensor
The water pressure sensor ensures that there is adequate pressure in the heating system for safe
operation. The pressure is displayed in PSI as the default. If the system pressure should drop
below 8PSI the firing rate of the boiler is reduced. If the pressure drops to 4PSI or lower, the boiler
will not fire.
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