DeltaSol BX – BX Plus

Controller DeltaSol BX

The DeltaSol BX is equipped with 26 pre-programmed basic systems for a broad range of 1- and 2-store systems. Pre-defined functions facilitate system parameterisation. The DeltaSol BX L has been especially developed as an economical solution for multi-store solar thermal systems. It features pre-programmed system layouts for a range of 2- and 3-store systems and special functions such as an extended priority and loading logic. With the integrated SD card slot, system data can easily be logged and transferred to a computer.
Solar thermall systems for DHW heating, building heating, pool heating, etc.

Controller DeltaSol BX Plus

The DeltaSol BX Plus is a system controller for multi-store solar and heating systems. The intuitive commissioning menu leads you through the system configuration by requiring the most important adjustments directly after connecting the controller. For an optimum overview, all sensor and relay allocations are listed in the service menu.


DeltaSol BX
• 4 relay outputs and 5 Pt1000 temperature sensor inputs
• 2 inputs for analogue Grundfos Direct SensorsTM (DeltaSol® BX)
• 2 PWM outputs for the speed control of high-efficiency pumps
• 26 basic systems to choose from (DeltaSol® BX), 9 basic systems (DeltaSol® BX L)
• For 2- and 3-store systems (DeltaSol® BX L)
• Drainback option (DeltaSol® BX)
• Thermal disinfection function, heat dump function
• Unit °C and °F

DeltaSol BX Plus

• 8 sensor inputs and 5 relay outputs
• Data logging, storing, easy transfer of controller adjustments prepared and firmware updates via SD card
• Pre-programmed optional functions such as drainback option, time-controlled thermostat function, thermal disinfection
• Up to 2 extension modules via RESOL VBus® connectable (21 sensors and 15 relays in total)
• 2 PWM outputs for speed control of high-efficiency pumps
• Automatic function control according to VDI 2169: Flow rate and pressure monitoring, warnings for too high ΔT values, interchanged flow and return pipes and night circulation
• Modulating heating control with 0-10 V boiler control (with EM Extension Module)

Max. number of collector fields: 2
Max. number of stores: 2 (BX), 4 (BX Plus)
DeltaSol BX:
Inputs: 5 Pt1000 temperature sensors, 1 V40 impulse input, 2 Grundfos Direct Sensors™ (analogue; DeltaSol® BX only)
Outputs: 3 semiconductor relays, 1 electromechanical relay and 2 PWM outputs
DeltaSol BX Plus:
Inputs: 8 (9) inputs for Pt1000, Pt500 or KTY temperature sensors, 1 V40 impulse input, inputs for 2 digital Grundfos Direct Sensors™, 1 input for a CS10 irradiation sensor
Outputs: 4 semiconductor relays, 1 potential-free relay, 2 PWM outputs
Dimensions: 198 x 170 x 43 mm

Solar thermall systems for DHW heating, building heating, pool heating, etc.

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