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110332-02 - 6/22
PHTM II
Installation, Operating & Service Instructions
18
Troubleshooting
(continued)
Table 18-7: Supply, Return, Header and Flue
Temperature Sensor Temperature versus
Resistance (10 kOhm)
Temperature
Ohms of
Resistance
°F
°C
32
0
32624
50
10
19897
68
20
12493
77
25
10000
86
30
8056
104
40
5324
122
50
3599
140
60
2483
158
70
1748
176
80
1252
194
90
912
212
100
674
230
110
506
248
120
384
Table 18-8: Outdoor Air Temperature Sensor
Temperature versus Resistance (10 kOhm)
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