TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
4
1 Connections
1.1
Temperature probes
The connected temperature probes are 3, or 4 in the case of water-water heat pumps with reversing cycle on the water side.
TERMINALS
MEANING
1, 2
Inlet water temperature
3, 4
1
st
evaporator outlet water temperature
5, 6
2
nd
evaporator outlet water temperature (only with plate
heat exchangers)
7, 8 (only for water-water heat pumps
with reversing cycle on the water side)
Condenser inlet water temperature
Temperature [°C]
-55
-50
-40
-30
-20
Resistance [
Ω
]
485
510
562
617
677
Temperature [°C]
-10
0
10
20
25
Resistance [
Ω
]
740
807
877
951
990
Temperature [°C]
30
40
50
60
70
Resistance [
Ω
]
1029
1111
1196
1286
1378
Temperature [°C]
80
90
100
110
120
Resistance [
Ω
]
1475
1575
1679
1796
1896
Temperature probes verification procedure:
•
disconnect the power supply to the unit;
•
disconnect the probe from microprocessor’s terminals;
•
use a digital Ohmmeter to measure the resistance value of the probe;
•
measure the temperature near the probe cap;
•
compare the resistance value measured with the one shown in the table: the corresponding temperature must be
approximately the same as the measured one.