Taco SR504-EXP

Taco SR504-EXP is a 4 Zone Switching Relay for circulators with priority and 3 powerports, designed for precise zone control in hydronic heating systems. Engineered for reliability and easy integration, this controller ensures efficient energy use while maintaining comfort across multiple zones.

Designed for compatibility with common boiler and hydronic configurations, it supports standard voltages and provides smooth priority switching to manage critical circuits. This makes it suitable for radiant floor systems, baseboard layouts, and zone-based comfort strategies.

• 4 independently controlled zones for flexible heating scheduling and zoning across living spaces, bathrooms, and basements
• Priority switching to guarantee essential circulators stay active when needed, ensuring rapid heat in priority zones
• 3 powerports for versatile wiring of pumps, circulators, and sensors, with safe, organized connections
• Robust protection and compatibility with typical boiler controls and radiant heating layouts, reducing setup time
• Easy installation with clear terminal labeling and straightforward wiring diagrams, suitable for both DIYs and professionals

Ideal for retrofit projects or new installations, the Taco SR504-EXP delivers dependable multi-zone control, helping maximize comfort and energy efficiency across your home heating system.