Description
The Taco Comfort Solutions SR501-OR-4 is a professional-grade switching relay designed for hydronic heating systems requiring intelligent outdoor reset control. By continuously monitoring outdoor air temperature and automatically adjusting the boiler supply water temperature, the SR501-OR-4 maximizes system efficiency, extends equipment life, and delivers consistent comfort throughout the heating season.
Outdoor reset control is one of the most effective strategies for reducing fuel consumption in hydronic systems — the SR501-OR-4 puts that capability directly into the hands of the installer in a compact, easy-to-wire package. Whether you’re commissioning a new radiant floor system, a baseboard hot water system, or a multi-zone fan coil installation, this relay simplifies the control architecture while delivering premium performance.
Key Features
- Integrated outdoor reset control for automatic supply water temperature adjustment based on outdoor conditions
- 4-zone switching relay capability for multi-zone hydronic heating applications
- Optimizes boiler efficiency by modulating supply water temperature to match heating demand
- Reduces short-cycling and extends boiler and circulator pump service life
- Compact, panel-ready enclosure for clean, professional installations
- Compatible with standard zone valves and circulator pumps
- Simplifies wiring with clearly labeled terminals for fast, accurate field connections
- Designed and engineered by Taco Comfort Solutions — a trusted leader in hydronic heating
Application
The SR501-OR-4 is ideal for residential and light commercial hydronic heating systems including radiant floor heating, baseboard convectors, and fan coil units. The outdoor reset function ensures the boiler only produces the water temperature the system actually needs — reducing energy waste and improving occupant comfort.
Why Choose Taco Comfort Solutions
Taco Comfort Solutions has been a cornerstone of the hydronic heating industry for decades, delivering reliable, innovative products trusted by professional contractors and engineers across North America. The SR501-OR-4 reflects Taco’s commitment to energy efficiency, ease of installation, and long-term system reliability.
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