Immersion Heaters are primarily used to help maintain oil temperature to avoid cold startups in cold operating conditions. They may also be utilized in water and other solutions. Standard Features: Keeps oil at approximately 80°F Automatic built-in fixed setting thermostat normally closes at 70°F and opens at 100°F Will not burn oil UL recognized and CSA certified Weatherproof wiring enclosure (NEMA 4) For tanks larger than 500 gallon use multiple heaters Heaters over 10 amps, 480 volt, or three phase must be used with a contactor Amps = Watts ÷ Volts for single phase Amps = Watts ÷ (Volts x 1.73) for three phase Wiring diagram included with heater