3 Wire Zone Valve Wiring Diagram. For some unknown reason he had all 4 zone valves. A wiring diagram is a sort of schematic which uses abstract pictorial signs to show all the affiliations of elements in a system.
Wiring diagrams help technicians to find out how a controls are wired to the system. White rodgers 3 wire zone valve wiring question diy home improvement forum / a zone valve is used to control the flow of water or steam in a hydronic heating system. These zone valve diagrams represent old thermostats.
