Mitsubishi Electric MXZ-8B48NA Technical & Service Manual page 54

<HIGH PRESSURE SENSOR>
Vout (V)
4.5
2.5
0.5
<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <2-phase pipe> (TH6)
• Thermistor <Outdoor> (TH7)
• Thermistor <Gas pipe> (TH-A~TH-E)·····Branch box
Thermistor R0 = 15k' ± 3%
B constant = 3480 ± 2%
1 1
R =15exp{3480(
–
t
273+t 273
0:[32°F] 15k'
10:[50°F] 9.6k'
20:[68°F] 6.3k'
25:[77°F] 5.2k'
30:[86°F] 4.3k'
40:[104°F] 3.0k'
High temperature thermistor
• Thermistor <Discharge/Compressor> (TH4)
Thermistor R120 = 7.465k' ± 2%
B constant = 4057 ± 2%
1
R =7.465exp{4057(
–
t
273+t
20:[68°F] 250k' 70:[158°F]
30:[86°F] 160k' 80:[176°F]
40:[104°F] 104k' 90:[194°F] 17.5k'
50:[122°F] 70k' 100:[212°F] 13.0k'
60:[140°F] 48k' 110:[230°F] 9.8k'
2.5 5 MPa
363 725 PSIG
PRESSURE
)}
t : :=(°F-32)/1.8
1
)}
t : :=(°F-32)/1.8
393
34k'
24k'
OUTDOOR
CONTROLLER BOARD
5V DC
3
WHT
2
BLU
Vout MICRO
PROCESSOR
1
BLK
GND
63HS
- : 5V (DC)
- : Output Vout (DC)
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
-4 -14 32 50 68 86 104122 °F
Temperature
500
400
300
200
100
0
25 50
122
77
Temperature
54
75 100 120
167 212 248 °F