42 RS8GM222 © Danfoss 10-2014 AK-CC 750 - 080Z0130 & 080Z0139
Refrigerating plant example
We have decided to describe the setup by means of an example
comprising a freezing appliance with 3 evaporators.
The example is the same as the one given in the "Design" section,
i.e. the controller is an AK-CC 750 + extension modules.
Freezing appliance
• Refrigerant R134a
• 3 evaporators
• Electric defrost on each section
• Fans
• Rail heat
• 3 displays for monitoring of temperature in the sections
Refrigeration:
• 3 AKV valves
• Superheat measured with P0 and 3 S2-sensors
• S3 is alarm sensor
• S4 is thermostat sensor
• Night setback on 5°F
Defrost:
• The defrost is stopped individually based on temperature (S5)
• Refrigeration starts when both defrosts have been accomplished
Fans:
• Operates during defrost
Cleaning:
• Pulse pressure for start and later stop of cleaning
Other:
• External start/stop used (Main switch)
For the example shown we use the following modules:
• AK-CC 750 controller
• AK-XM 101A analog output module
There is also an internal main switch as a setting. Both must be “ON”
before any adjustment is made.
The modules used are selected in the design phase.
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