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Operation: When the thermostat calls for heat, the appropriate circu-lator is energized and the isolated end switch (X and X) will start the boiler. Priority Operation: When zone 3 is switched to the priority setting ...
Taco Switching Relays combine clearly labeled PC board layouts with advanced features that allow for total system customization. Whether using basic functionality, DIP switch features or the advanced features of the T...
Taco Switching Relays combine clearly-labeled PC board layouts with advanced features that allow you to completely customize your system. And whether you're using basic priority switching, Taco Plug-In PowerPort Cards...
Manuals and User Guides for Taco SR503. We have 1 Taco SR503 manual available for free PDF download: Wiring Manual Taco SR503 Wiring Manual (105 pages)
Taco Switching Relays combine clearly-labeled PC board layouts with advanced features that allow you to completely customize your system. Whether youre using basic priority switching, Taco Plug-In PowerPort Cards or a...
The Taco SR503 is a 3-zone switching relay designed to manage up to three separate circulator pumps in hydronic heating systems. Engineered for use with 24V thermostats, this control panel simplifies zone-based instal...
Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration.
Mar 10, 2026 · The Taco SR503-4 Switching Relay is the best choice for all your zoning needs, with advanced PowerPort Cards, external diagnostic lights, switchable priority and contractor friendly PC board layouts.
Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration.
Operation: When any thermostat calls for heat, the appropriate circulating pump is energized and the isolated end switch (X and X) will start the boiler.
