Simple solar controller with graphical display

The ESR31-R or ESR31-D unit is a multi-purpose differential controller. A graphical display simpli es program selection and shows the position of the sensors in the hydraulic diagram. Additional information can be read in via the data link. Thus, in parallel to the controller operation (solar system) it is also possible to calculate the yield (heat quantity). The range of use extends from the single circuit solar system through to sanitary water treatment by way of pump speed control.

Simple solar controller with relay or triac output

The ESR21-R or ESR21-D unit is a single circuit di erential controller. Due to the wide control range, a large number of applications are possible: service water and swimming bath solar systems, boiler charging, fan control, burner requirement via holding circuit, air damper control of ground collectors using a temperature window, etc.

Fresh water controller

The unit is a controller for fresh water stations with very simple operation. The settings are limited to the entry of the speed control variant (sliding switch) and the required hot water nominal temperature. If necessary, the user can also switch the pump output from automatic to manual mode. Sensors matched to each other provide e cient pump speed control for the various variants.

Single circuit solar controller, Charging pump controller, Single circuit solar controller as PV version

The ANS21 or ANS21-L unit is a solar controller which has, been kept deliberately simple when it comes to installation and operation. Both the collector and the tank temperature are indicated using light bars. The smooth changeover between the signal bulbs ensures precise reading of the temperature. The ANS21-PV is suitable for use in 12V or 24V direct current networks. Moreover, changeover to a charging pump scheme is possible.

Schuko differential controller

The SDR21 unit is a single circuit di erential controller. Thanks to the installation in the Schuko intermediate plug housing, no wiring work to connect to the mains supply is necessary. Due to the wide adjustment range, use in a large number of application areas is possible, such as service water and swimming bath solar systems, charging pumps or fan controllers.