I have a cold room.4 separate freezer. Using common refrigerant circuit with 3 compressors. Controller is tuscan universal from Honeywell. This controller total damaged. Clients want to replace the controller and rewiring. I want to design new control with using dixell board. My idea is, can control individual freezer by shut off the liquid line solenoid valve on each evaporator. My doubt is...
1. How do I control the compressor stage and compressor cutoff?
2. As defrosting one evaporator, it will affect other evaporators?
I want typical wiring diagrams of these type units.
Can anybody help me?