Our NEMA 4X weatherproof line voltage thermostats are commonly found in many outdoor settings such as de-icers! The thermostat controller measures air temperature to turn on a de-icer when the temperature falls below a set point (0°F-80°F), which keeps the water moving to prevent it from becoming a thick, solid piece of ice. Some people even use them as a dock de-icer thermostat!
All you need to do is simply plug the power cord from the controller to a grounded 120V outlet, set the temperature you wish the de-icer to come on using the dial, and plug the de-icer into the controllers piggyback plug. When the ambient air temperature falls to the desired set point the thermostat turns the de-icer on. When temperature rises +3° above the set point, the thermostat will automatically turn the de-icer off. De-icer manufacturers recommend setting the dial at 30°F to kick on the equipment when air temperature is below freezing.
De-icers move warm water from the bottom of a pond, lake, etc. creating an ice-free space around boats, docks or other water. In addition to protecting personal property, the thermostat helps protect fish and other aquatic animals. For more information about de-icers, check out a video here!