DeltaSol MX

Controller DeltaSol MX

The DeltaSol MX is the most versatile system controller for complex solar and heating systems in our product range. It is ideal to control a combination of solar and non-solar parts of the system. Easy combination and parameterisation of pre-programmed functions for several millions of hydraulic variants.


• 14 relay outputs and 12 inputs for Pt1000, Pt500 or KTY temperature sensors
• Up to 5 extension modules via RESOL VBus® (45 sensors and 39 relays in total)
• Inputs for analog and digital Grundfos Direct Sensors™
• Integrated control of up to 4 high-efficiency pumps via PWM outputs
• Data logging, storing, easy transfer of controller adjustments prepared and firmware updates via SD card
• Cooling over the heating circuit with condensation detection by means of a dew point switch
• Simplified timer, 0-10 V boiler control, and DHW preheating
• Remote access to the heating circuits with a room control unit(s) or the VBus®Touch HC App
• Extended optional functions, e.g. solid fuel boiler function with mixer and target temperature control

Inputs: 12 Pt1000, Pt500 or KTY temperature sensor inputs (can optionally be used for remote controls, operating mode switches or potential-free switches), 3 impulse inputs for V40 flowmeters, 1 input for a FlowRotor, 1 CS10 solar cell, 4 Grundfos Direct Sensors™ (2 x analogue, 2 x digital)
Outputs: 14 relays, 13 of them semiconductor relays for pump speed control, 1 potential-free relay and 4 PWM outputs (convertible to 0-10 V signal outputs)
PWM frequency: 512 Hz
PWM voltage: 10.5 V
Switching capacity:
1 (1) A 240 V~ (semiconductor relay)
4 (1) A 24 V DC/ 240 V~ (potential-free relay)
Total switching capacity: 6.3 A 240 V~
Power supply: 100 – 240 V~ (50 – 60 Hz)
Supply connection: type Y attachment
Standby: 0,84 W
Temperature controls class: IV
Energy efficiency contribution: 5 %
Mode of operation: type 1.B.C.Y. action
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
VBus® current supply: 35 mA
Functions: solar system controller for use in solar and heating systems. 7 integrated calorimeters and control of weather-compensated heating circuits. Adjustable system parameters and add-on options (menu-driven), balance and diagnostics functions, function control according to VDI 2169
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication/Display: full graphic display
Operation: 7 push buttons at the front
Ingress protection: IP 20 / IEC 60529
Protection class: I
Ambient temperature: 0 … 40 °C
Pollution degree: 2
Dimensions: 253 × 200 × 47 mm

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

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