Preferred Instruments

FlexFit Retrofit – More savings, More efficiency

Made in the U.S.A., Preferred retrofits provide sustainable solutions for reducing energy costs with upgraded efficiencies. At this site in Queens, NY, one of our skilled field service engineers replaced an obsolete Honeywell RM7800 L flame safeguard/ ControLinks fuel-air combination with our FlexFit Linkageless Controller. The FlexFit controller brings linkageless control to your burner with an integrated flame safeguard […]

Modbus RTU verses Modbus TCP/IP: What’s the Difference?

-Robert Frohock, Danbury, CT See also: “I know what Modbus is, but what is BACnet?” Modbus Protocol is a messaging structure developed by Modicon. It is used to establish master-slave/client-server communication between devices. Modbus has a lot of protocol options. But the two used most are Modbus RTU (Remote Terminal Unit), serial (RS-232 or RS-485) protocol or Modbus […]

Boiler System 101: The Advantages of Full System Integration

Danbury, CT – A boiler system functions as a critical component to the continuous operation of a facility.  It is important to maintain safe, reliable, and efficient operation while minimizing any downtime of the boiler system to prevent disruption of operation and significant loss. A boiler system consists of many sub-systems working in harmony – the boiler, the burner and its controls, boiler […]

How NYC’s Department of Education Gained Control of Its Faulty Boiler Fans

Could an innovative control make outdated equipment work like its modern counterparts? Read the article in Today’s Boiler here. New York City regulates the size and efficiency of draft fans in most large physical plants and municipal properties, but the NYC Department of Education was struggling to meet those guidelines. The department utilized old, outdated boilers that were […]

Emissions Reduction Strategy at Leading University

Made in the U.S.A. to meet aggressive emissions reduction and sustainability goals with ENSYN Renewable Fuel Oil (RFO, made from sustainably sourced wood waste), this prominent New England university chose Preferred’s burner, and combustion controls design solution for this one of three (two in the future) boiler upgrades. Pictured below is a fuel skid for RFO. The Preferred Ranger API-RF burner, mounted […]