Mitsubishi Electric Mr.SERVICE PUHZ-HRP71VHA Service Manual page 57

Split-type, heat pump air conditioners
Hide thumbs Also See for Mr.SERVICE PUHZ-HRP71VHA:
Table of Contents

Advertisement

<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Outdoor 2-phase pipe> (TH6)
• Thermistor <Outdoor> (TH7)
• Thermistor <Outdoor pipe> (TH32)
• Thermistor <Outdoor pipe> (TH33)
Thermistor R0 = 15k' ± 3%
B constant = 3480 ± 2%
1
=15exp{3480( 273+t – 273 )}
R
t
0:
15k'
30:
10:
9.6k'
40:
20:
6.3k'
25:
5.2k'
Medium temperature thermistor
• Thermistor <Heatsink> (TH8)
W
HRP71, 100VHA only
Thermistor R50 = 17k' ± 2%
B constant = 4150 ± 3%
1
=17exp{4150( 273+t – 323 )}
R
t
0:
180k'
25:
50k'
50:
17k'
70:
8k'
90:
4k'
High temperature thermistor
• Thermistor <Discharge> (TH4)
Thermistor R120 = 7.465k' ± 2%
B constant = 4057 ± 2%
1
=7.465exp{4057( 273+t – 393 )}
R
t
20: 250k'
70:
30: 160k'
80:
40: 104k'
90: 17.5k'
50:
70k'
100: 13.0k'
60:
48k'
110:
1
4.3k'
3.0k'
1
1
34k'
24k'
9.8k'
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
200
150
100
50
0
500
400
300
200
100
0
57
Temperature ( )
25
50
75
100
Temperature ( )
50
75
100
25
Temperature ( )
125
120

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents