RESOL has released the The DeltaSol DB differential temperature controller for drainback systems, available in four different versions suited to any drainback system.
The DeltaSol DB/3, for instance, has two standard relays and a booster function for switching on a second pump during the filling of the drainback system. This version is also equipped with an operating-hours counter and a heat-quantity measurement function.
As with all other RESOL solar thermal controllers, the new product features a shapely design and user-friendly operation, with a display that allows easy and intuitive menu navigation.
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