The “DB” System Provides a reliable method for ensuring that the collectors and their pipelines never freeze. This is done by removing all the water from the collector(s) and piping when the system is not producing heat. Freeze protection is provided when the system is in the drain mode. Each time the pump shuts off the water in the collector(s) and piping drains into the insulated reservoir tank. To allow for complete drainage the collector(s) and piping are mounted at a slight angle. A sight glass attached to the reservoir tank shows when the reservoir tank is full, indicating that the collector(s) has been completely drained.

The differential control of the “DB” System activates the pump using the same strategy as the “D” System. The solution, distilled water or antifreeze, circulates in a closed loop never coming in direct contact with the potable water in the storage tank. The closed loop includes the collector, connecting piping, pump, reservoir tank and heat exchanger. The heat exchanger wraps around the perimeter of the storage tank heating the potable water in the tank.

The "DX" drainback system works on the same principle as the "DB" drainback. The major difference being, the heat exchanger is integrated into the drainback tank. This type of drainback tank can be retrofitted to existing water heaters.

Eagle Sun Collectors

AE Collector Sizing Specs

Drainback DB System

Solaraide HE

The “IPV” System is similar to the “I” System except that the energy needed to power the pump is provided by a photovoltaic (PV) panel. The PV panel converts sunlight into electricity, which powers a DC pump. The transfer fluid circulates through the system only when the sun is shining.

The DC pump and PV are suitably matched to ensure optimum performance. The pump starts when there is sufficient solar radiation available to heat the thermal collector. The pumping speed increases with the increase in the amount of sunlight. This produces a flow rate matched to the level of heat transfer required. The system then shuts off when the available solar energy diminishes.

IPV-80-40 - Indirect "IPV" System Photovoltaic Controlled - Closed Loop

IPV-80-52 - Indirect "IPV" System Photovoltaic Controlled - Closed Loop

IPV-80-64 - Indirect "IPV" System Photovoltaic Controlled - Closed Loop

IPV-120-64 - Indirect "IPV" System Photovoltaic Controlled - Closed Loop

IPV-120-80 - Indirect "IPV" System Photovoltaic Controlled - Closed Loop

IPV-120-96 - Indirect "IPV" System Photovoltaic Controlled - Closed Loop