Johnson Controls YVAHP0721CW Series, Service Manual

Page: 348 / 416

(Main Parts)
MAINTENANCE
4-64
SM-16007
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0
10
20
30
40
50
60
70
80
5
(-15)
14
(-10)
23
(-5)
0
(0)
41
(5)
50
(10)
59
(15)
68
(20)
77
(25)
86
(30)
95
(35)
104
(40)
113
(45)
122
(50)
131
(55)
140
(60)
82
61
46
35
27
20.5
16
12.5
10
8
5.3
3.6
2.5
90
Ambient Temperature
o
F (
o
C)
Thermistor
Resistance
(kΩ)
Thermistor Characteristics
116.5k
Ω
41.4k
Ω
17.2k
Ω
8.1k
Ω
0
50
100
150
200
0
(-18)
50
(10)
100
(38)
150
(66)
200
(93)
250
(121)
Thermistor
Resistance
R
T
[k
Ω
]
Temperature T [
o
F (
o
C)]
Thermistor Characteristics
R
25
=200k
Ω
(When T=77 o F (25 o C), R
T
=200k
Ω
)
B=3920k
R
T
=R
25
.
exp B (1/T [K] - 1/298)