Thermostat Bands; Night Setback Of Thermostat Value; Temperature Sensor Types - Danfoss AK-CC55 Multi Coil User Manual

AK-CC55 Multi Coil

Thermostat bands

Thermostat bands can be used beneficially for appliances where different product types are stored, which requires
different temperature conditions. It is possible to change between the two different thermostat bands via a contact
signal on a digital input. Separate thermostat and alarm limits can be set for each thermostat band.
For the defrost control, separate defrost stop temperature and max. defrost time can be set for each thermostat
band.
Figure 9: Thermostat band function with two different band settings

Night setback of thermostat value

In refrigeration appliances there may be big load differences between the shop's opening and closing hours,
especially if night lids/blinds are used. The thermostat reference may be raised here without it having any effect on
the product temperature.
Change-over between day and night operation can take place as follows:
• via an external switch connected to a digital input
• via a signal from the data communication system
Figure 10: Thermostat band function with Night setback

Temperature sensor types

The S2 sensors always have to be Pt1000 sensors due to the high measuring accuracy.
For the S4 and S5 sensors, the user can select between the following sensor types:
0=Pt1000 (Danfoss AKS 11)
1=PTC1000 (Danfoss EKS 111)
2=NTC 5k (Danfoss EKS 211)
3=NTC 10k (Danfoss EKS 221)
4 = User-defined
If "User-defined" 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 defined 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.
© Danfoss | Climate Solutions | 2022.08 BC365022028193en-000201 | 11