The differential thermostat manages the operation of a circulation pump and/or the electric heating element of a domestic solar hot water heater by measuring the difference between the temperature of the water heater and the solar collector (or other heating source, such as a wood burning boiler, pellet boiler, etc.)
- Equipped with two LM335 thermal sensors, one for the water heater and one for the solar collector;
- No cable length limit for the temperature sensors;
- Measures the temperature of the water inside the water heater, as well as the temperature of the liquid in the solar collectors, and if the temperature of the is 2-20°С higher (manually adjusted), it turns the circulation pump on until the temperatures are equalized;
- When the solar collector temperature is 40°С or lower, the thermostat doesn't turn on the circulation pump; instead it turns on the electric heating element of the water heater.