520 Indoor / 520 Outdoor Service Manual
Ver. 1.00
14
CONFIDENTIAL
8. (A) Resistance values of the temperature thermistors
The 520 Indoor and 520 Outdoor use the same thermistors.
Resistance values at different temperatures
ºF
32
41
50
59
68
77
86
95
104
113
ºC
0
5
10
15
20
25
30
35
40
45
Resistance
k
Ω
23.76
19.08
15.43
12.56
10.28
8.47
7.02
5.85
4.90
4.12
Temperature
ºF
122
131
140
149
158
167
176
185
194
203
212
ºC
50
55
60
65
70
75
80
85
90
95
100
Resistance
k
Ω
3.49
2.96
2.53
2.16
1.86
1.60
1.39
1.21
1.05
0.92
0.81
Temperature / ºF vs Resistance / k
Ω
Temperature /
℃
vs Resistance / k
Ω
Temperature
0.00
5.00
10.00
15.00
20.00
25.00
20
40
60
80
100
120
140
160
180
200
220
Temperature / ºF
R
e
s
is
it
a
n
c
e
/
k
Ω
0.00
5.00
10.00
15.00
20.00
25.00
0
10
20
30
40
50
60
70
80
90
100
Temperature / ºC
R
e
s
is
it
a
n
c
e
/
k
Ω
