Specifications

44
HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Outdoor pipe> (TH3, TH32)
• Thermistor <Outdoor 2-phase pipe> (TH6)
• Thermistor <Outdoor> (TH7)
Thermistor R0 = 15k' ±3%
B constant = 3480 ± 2%
R
t =15exp{3480(
273+t
–
273
)}
0: 15k'
10: 9.6k'
20: 6.3k'
25: 5.2k'
0: 180k'
25: 50k'
50: 17k'
70: 8k'
90: 4k'
30: 4.3k'
40: 3.0k'
1
1
Thermistor R50 = 17k' ±2%
B constant = 4150 ± 3%
R
t =17exp{4150(
273+t
–
323
)}
1
1
Thermistor R120 = 7.465k' ±2%
B constant = 4057 ± 2%
R
t =7.465exp{4057(
273+t
–
393
)}
1
1
Medium temperature thermistor
• Thermistor <Heat sink> (TH8)
20: 250k'
30: 160k'
40: 104k'
50: 70k'
60: 48k'
70: 34k'
80: 24k'
90: 17.5k'
100: 13.0k'
110: 9.8k'
High temperature thermistor
• Thermistor <Discharge> (TH4)
0
10
20
30
40
50
-20-100 1020304050
Temperature (:)
Resistance (k")
200
150
100
50
0
25 50 75 100 125
Temperature (:)
Resistance (k")
500
400
300
200
100
0
25
50 75 100 120
Temperature (:)
Resistance (k")
OCT04B-2.qxp 05.11.29 11:28 AM Page 44