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 FuelMizer™ SR501-OR-4 Switching Relay with Outdoor Reset

Product > Electronic Controls > Zone Controls >Enhanced Zone Controls > FuelMizer (SR501-OR) Boiler Reset Control


The FuelMizer™ (SR501-OR) is a microprocessor-based control designed to regulate the supply water temperature of a single boiler, based on the outdoor temperature. The FuelMizer is a boiler reset control and switching relay in one unit; it is ideal for retrofit application, but may also be used in new installations as well.

Features include:
  • Full outdoor boiler reset control
  • Can control system or zone valve circulator
  • Over-ride of outdoor reset when DHW tank is calling
  • Easy to install and set; will not affect boiler's warranty
  • Front mounted LED lights for full diagnostic information
  • Ideal for retrofit applications of just about any hot water boiler
  • Typical energy savings is about 14% with some customers experiencing up to 30%

Click here to download the FuelMizer SlimJim.

Fuel Mizer video
Learn about the Fuel Mizer in this short video.