- The programming of the PLC – defrosting tunnel sol! the full regulation of the thawing tunnels.
- Each tunnel has 2 sections, these sections should be able to function separately from each other, so that it is possible to defrost a section with 12 racks.
- The PLC defrosting tunnel controls the following components:
o WFS ® systems
o Damping and compressed air valves for defrosting by steam
- The PLC refrigeration system controls the heating fans and the glycol valves for the delivery of cold and heat. The PLC refrigeration system receives the following information from the PLC defrost tunnel:
o Cold question per section
o Heat question per section
o Switch on fans (left-right-off) per fan)
capacity 15 ton per tunnel , total 30 ton
