Thermal Solutions APEX APX425C User Manual

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APEX Installation, Operating, & Service Instructions
Table 12-11: Outdoor Sensor
Temperature vs. Resistance,
10kOhm NTC, Beta = 3435K
Table 12-12: Header Sensor
Temperature vs. Resistance,
10kOhm NTC, Beta = 3950K
Outdoor Temperature
Ohms of
Resistance
°F °C
-20 -28.9 106926
-10 -23.3 80485
0 -17.8 61246
10 -12.2 47092
20 -6.7 36519
30 -1.1 28558
40 4.4 22537
50 10.0 17926
60 15.6 14356
70 21.1 11578
76 24.4 10210
78 25.6 9795
80 26.7 9398
90 32.2 7672
100 37.8 6301
110 43.3 5203
120 48.9 4317
Temperature
Ohms of
Resistance
°F °C
32 0 32648
50 10 19898
68 20 12492
77 25 10000
86 30 8057
104 40 5327
122 50 3602
140 60 2488
158 70 1752
176 80 1256
194 90 916
212 100 697
248 120 386
12 Troubleshooting (continued)

Thermal Solutions APEX APX425C Specifications

General

Brand	Thermal Solutions
Model	APEX APX425C
Category	Boiler
Language	English