88
<Thermistor feature chart>
Low temperature thermistors
Saturation temperature of suction pressure thermistor (TH2)
Pipe temperature thermistor (TH5)
Outdoor temperature thermistor (TH6)
Thermistor R0 = 15k
'
± 3%
B constant = 3480K ± 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 = 4170K ± 3%
R
t
=17exp{4170( 273+t
–
323)}
1
1
Medium temperature thermistor
Radiator panel temperature thermistor (THHS)
0
10
20
30
40
50
<Low temperature thermistor>
-20 -10 0
10 20 30 40 50
Temperature (
:
)
Resistance (K
"
)
200
<Medium temperature thermistor>
150
100
50
0
25
50
75
100
125
Temperature (
:
)
Resistance (K
"
)
200
<Medium temperature thermistor>
150
100
50
0
25
50
75
100
125
Temperature (
:
)
Resistance (K
"
)
0
:
180k
'
25
:
50k
'
50
:
17k
'
70
:
8k
'
90
:
4k
'
Thermistor R50 = 17k
'
± 2%
B constant = 4150K ± 3%
R
t
=17exp{4150( 273+t
–
323)}
1
1
Medium temperature thermistor
Radiator panel temperature thermistor (THHS A/B)
PUMY-125VMA PUMY-125MVA
1
PUMY-71VM PUMY-125VM PUMY-125YM
PUMY-71VM
1
PUMY-125VM
1
PUMY-125YM
1
PUMY-71VM
2
PUMY-125VM
2
PUMY-125YMA
OC183E--3.qxp 10.5.6 3:05 PM Page 88
