The Varisol-S32 differential thermostat (SP-DT) complements any medium-sized solar heating system.
It drives conventional and PWM circulators at fixed speeds and has an output for activating the auxiliary source (burner, electrical resistance).
If your solar installation consists of a collector field, a double or triple energy boiler with two or more sensor positions, and an external energy source such as a boiler this is the controller you should choose.
It incorporates useful features such as:
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