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Taco Inc.: Delta T Circulators

January 18, 2010
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The 00 Delta T (00-VDT) circulators combine a microprocessor-based variable-speed differential controller with the reliability and convenience of the manufacturer’s 00® cartridge circulators. To use, dial in the design delta-T of the system or zone (from 5 to 50°F). The circulator automatically adjusts its performance to match the system’s ideal Btuh output, while reducing fuel consumption 4-5 percent and eliminating velocity noise. The circulator includes a snap-in PC board, LED status panel, plug-in low-voltage wiring terminal for the two strap-on temperature sensors, and an optional integral flow check. By maintaining a constant delta T, the circulator automatically varies the flow as needed to ensure optimal performance and heat transfer. The 00-VDT is wired-in just like any other pump. According to the manufacturer, unlike a differential pressure pump that’s always on, always drawing power 24/7/365, the circulator shuts off when there is no call for heat. The circulator is fuse-protected and UL-approved. It comes standard in 008, 0012, and 0013 cast iron and stainless steel versions.

Taco Inc., 1160 Cranston, RI 02920; 401-942-8000; 401-942-2360 (fax); www.taco-hvac.com

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