TACO Zone Valves For Beginners (wiring, operation, diagnostics)

All of the basics on Taco zone valves (3-wire), from how they work, how they are wired and how to run a few diagnostic tests. 00:00 Introduction 00:24 Terminals #1 & 2 01:02 Internal circuit (terminals 1 & 2) 01:28 Power Circuit (purpose) 01:45 End Switch 01:58 Thermostat's role 02:27 Wiring power to zone valve 03:28 Wiring Common to XFMR 03:39 Testing for power (multimeter) 04:08 Continuity Check on Internal Power Circuit 04:47 End switch / T & T internal wiring (terminals #2 & 3) 05:24 T & T wiring connections terminals 2 & 3 05:45 Operational Timing (Diagnostic Patience) 06:45 Continuity on End Switch terminals 06:55 Multiple Zone Valve Wiring 07:11 Wiring 24V Power to Multiple T-Stats 07:33 Wiring 24V Power From T-Stat to Zone Valves 07:53 Wiring Multiple Commons to XFMR / T Circuit 08:10 Wiring terminals #3 to other T circuit connection 08:30 Different Wiring Configurations Caveat 08:45 Suggested Material / Conclusion