Freezer Schematic - ACME HOW TO Freezer Schematic. What is a Schematic? T he electrical wiring, the motors, heaters, switches, controls and anything else in the electrical or electronic operation of an appliance are included in the schematic diagram. This diagram indicates information about the path of wires and what they connect to. Walk In Freezer Wiring Schematic | Free Wiring Diagram Variety of walk in freezer wiring schematic. A wiring diagram is a streamlined conventional photographic depiction of an electric circuit. It reveals the components of the circuit as streamlined shapes, and the power and also signal links between the tools.