Temperature Monitoring; Thermostat Bands; Night Setback Of Thermostat Value; Temperature Sensor Types - Danfoss AK-CC55 Water Loop User Manual

AK-CC55 Water Loop

Temperature monitoring

Just as is possible for the thermostat, the alarm monitoring can be set with a weighting between S3 and S4 so that
you can decide how much the two sensor values should influence the alarm monitoring. Minimum and maximum
limits can be set for alarm temperature and time delays. A longer time delay can be set for high temperature alarm.
This time delay is active for pull-down, after defrosting, appliance cleaning and start-up.

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. For the compressor control it is possible to disable the second compressor in thermostat band 2 if required.
Figure 11: 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 12: Thermostat band function with Night setback

Temperature sensor types

For the S3, S4, S5, S7 and S8 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
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