Taco VR3452 ECM High-Efficiency Circulators

Taco VR3452 ECM High-Efficiency Circulators for Hot Water, Chilled Water, and Commercial Hydronic Systems

Taco VR3452 ECM High-Efficiency Circulators are self-adjusting wet rotor circulators designed for efficient operation in hot water and chilled water hydronic applications. Built with an ECM permanent magnet motor, the VR3452 can reduce electrical energy use by up to 85% compared to conventional circulators while providing reliable flow control for modern heating and cooling systems.

The VR3452 includes integrated electronic regulation and a user-friendly interface that allows settings to be adjusted directly at the circulator. Operating modes include proportional pressure, constant pressure, fixed speed, and night setback turndown, giving contractors and facility teams flexibility to match pump operation to system demand.

In proportional pressure mode, the circulator operates on an inclining performance curve where differential pressure increases with flow. In constant pressure mode, it maintains a selected differential pressure from zero flow to maximum speed. Fixed speed mode allows operation between 1100 and 4400 RPM, while night setback turndown reduces operation when system temperature conditions indicate lower demand.

Designed for hot and chilled water applications, Taco VR3452 circulators provide a practical high-efficiency solution for commercial hydronic systems, variable flow heating and cooling loops, and applications where energy savings, control flexibility, and simplified setup are important.

Features

• ECM high-efficiency wet rotor circulator design
• Self-adjusting operation for hot water and chilled water applications
• Integrated electronic regulation
• ECM permanent magnet motor
• Saves up to 85% electrical energy compared to conventional circulators
• User-friendly interface for direct pump setup and adjustment
• Proportional pressure control mode
• Constant pressure control mode
• Fixed speed control mode
• Night setback turndown mode
• Proportional and constant pressure Hset range from 4.5 to 35 feet
• Hset adjustable in 0.5-foot increments
• Factory default Hset: 17.5 feet
  
• Factory default fixed speed: 4400 RPM
• Night mode automatically switches between selected operating curve and night curve based on media temperature changes
• Designed to support energy savings in variable demand systems

Applications

• Hot water hydronic systems
• Chilled water systems
• Commercial HVAC systems
• Hydronic heating systems
• Hydronic cooling systems
• Variable flow pumping applications
• Mechanical room circulation systems
• Energy-efficient pump replacement
• Commercial and institutional building systems
• Systems requiring proportional pressure or constant pressure control