Learn how to properly wire a 3 wire zone valve with a wiring diagram. Understand the connections and controls needed for efficient heating systems.. Learn how to wire a Taco 3 wire zone valve with a wiring diagram. Get step-by-step instructions and troubleshooting tips.
All wiring must comply with local codes and ordinances. Connections to the individual valves are shown in Fig. 6 and 7. See Fig. 8 through 14 for typical hookups. If replacing a Taco, Dole, Flair or White Rodgers 3-wire valve with a 2-wire V8043E or F, see Fig. 15 through 27. Check that the pressure rating of the new valve is appropriate for the application.. Note: When using Alternative Wiring diagram, the boiler oper-ating control's ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat.