Therma-Coil Therma-coil User Manual - page 6
of
7
Pumped (active) Method
When the water heater isn’t located close to and higher than the stove, a small circulator pump
and controller is used. The differential controller compares a probe sensor inside the bottom
of the water heater / storage tank, and a probe sensor inside the therma-coil exit line. When-
ever the stove water is hotter than the storage tank, the controller turns on the circulating
pump. The pump circulates the cooler water from the bottom of the water heater, through the
Therma-coil where it is heated, and back to the top of the water heater (costing only pennies
a day in electricity.)
Plumbing