Immersion Heaters - Heavy-duty medium watt density elements have incoloy sheathing and prewired leads;Voltage Options - Supports 208, 240, and 480V single-phase and three-phase configurations, with field conversion capabilities;Economy Mode - Automatically lowers the operating set point during off-peak or unoccupied periods, reducing energy costs;Linear Sequencing - Sequential activation of heating elements minimizes current surges and ensures accurate temperature control;Power Circuit Fusing protects elements and contactors from shortcircuits, overloading or line surges;Meets National Electric Code requirements (fusing required when current draw exceeds 48 amps);Magnetic Contactors - Heavy-duty UL-rated contactors ensure reliable operation;Glass-lined tank for durability - Available in 50, 80, and 119-gallon capacities;Advanced Controls - Adjustable immersion temperature control ranges from 90°F to 190°F for precise heating;3-year limited tank and 1-year limited parts warranty