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Connecting Taco Controls and Nest Thermostats
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HeatingHelp.com
Member, Moderator, Administrator Posts: 7
Here are instruction sheets for Nest to Taco ZVC with 3-wire application, Nest to Taco ZVC with 2-wire application, Nest to Taco SR with 3-wire application, and Nest to Taco SR with 2-wire application.
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Also make sure to pre-charge the Nest so that the battery is at 100% before wiring to the ZVC or SR controls.0
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Do the Taco ZVCs apply power to close the valves, or are they assumed to be self-closing? Said differently, does the Nest connect power from Rh to W1and C respectively when calling and not calling for heat?0
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