21
<Thermistor characteristic graph>
• Room temperature thermistor (TH1)
• Pipe temperature thermistor/liquid (TH2)
• Condenser/evaporator
temperature thermistor (TH5)
Thermistor R
0
=15k
'
± 3%
Fixed number of B=3480
± 2%
Rt=15exp { 3480( ) }
30
_
F 15.8k
'
50
_
F 9.6k
'
70
_
F 6.0k
'
80
_
F 4.8k
'
90
_
F 3.9k
'
100
_
F 3.2k
'
Thermistor R
0
=6.0k
'
±5%
Fixed number of B=3390
± 2%
Rt=6exp { 3390( ) }
30
_
F 6.3k
'
50
_
F 3.9k
'
70
_
F 2.5k
'
80
_
F 2.0k
'
90
_
F 1.6k
'
100
_
F 1.3k
'
Thermistor for
lower temperature
1
273+(t-32)/1.8
1
273
1
273+(t-32)/1.8
1
273
Thermistor for
drain sensor
0
10
20
30
40
50
0
-20
20
40
60
80
100
120
< Thermistor for lower temperature >
Temperature (°F)
Resistance (k
)
20
40
60
80
100
120
140 170
< Thermistor for drain sensor >
Temperature (°F)
0
1
2
3
4
5
6
7
8
9
10
Resistance (k
)
