Danfoss AK-CC55 Water Loop - Compressor and Pump Control

1.
2.
3.
y
x
A
350
300
250
200
150
100
50
0
-40 -20 0 20 40 60 80
Danfoss 80G8338
x
y
A
Temp [°C]
R [kohm]
Sensor point (-30 °C, 180 kΩ)
1
B
A
[°C]
t
t
Danfoss 84B8300
A
B
Dierence
Cut-out
If “User-dened” is selected, three sensor measuring points must be provided and based on these three sensor
points, a sensor characteristic is generated.
A sensor point is dened by setting a temperature value and the corresponding resistance value at this temperature.
The resistance value is set via two values for kohm and ohm respectively. These values can be found in the data
sheet for the sensor.
The three sensor points must be:
Lowest temperature in wanted measuring range
Highest temperature value in wanted temperature range
Temp. value in the middle where a high measuring accuracy is required
A sensor error is detected at temperature values below/above the min./max. temperature values typed in for the
sensor points.
Figure 13: Example of sensor points from a NTC sensor
Limitations:
A user dened temperature sensor can only be be dened within the temperature range from -40 – +60 °C and
within the resistance range from 400 – 179.999 ohm.
When applying a new user dened sensor type, please contact Danfoss for validation of compliance and measuring
accuracy.
Compressor and Pump control
Single compressor (Application 1 and 2)
The single compressor is on/o controlled, based on the thermostat temperature and the dened cut-out and cut-in
limits.
At the cut-in limit the compressor is started and at the cut-out limit the compressor is stopped.
Figure 14: Control of single compressor
© Danfoss | Climate Solutions | 2022.04 BC378540472015en-000101 | 11
AK-CC55 Water Loop