RESOL is a German brand and a global leader in innovative control technology for solar thermal and heating systems. With over 40 years of experience, we specialize in designing and manufacturing advanced controllers, data loggers, and accessories to maximize energy efficiency and system performance. Renowned for our precision engineering and sustainable approach, RESOL empowers homes and businesses with intelligent solutions for renewable energy management. Trust RESOL for cutting-edge technology that drives the transition to a greener future.
Direct connection of an electric immersion heater up to 3 kW (230 V~)
DHW heating with rapid heat-up and thermal disinfection
Time and temperature control of the electric backup heating
Solar backup heating suppression
Heat quantity measurement via VFD Grundfos Direct Sensor™
PWM output for the speed control of a high-efficiency pump
Quick access to the holiday and the manual modes
Status display for a bidirectional HE pump
4 pre-configured basic systems12 pre-programmed schemes for the temperature controls classes II, III, V, VI, VII and VIII
4 relay outputs (incl. 1 potentil-free extra-low voltage relay)
5 inputs for Pt1000 temperature sensors
5 operating modes, boiler protection, room thermostat and night correction
Holiday mode, chimney sweeper function and screed drying function via microbuttons
Data logging, storing, easy transfer of controller adjustments prepared and firmware updates via SD card
Modulating heating control with 0-10 V boiler control
For the speed control of high-efficiency pumps
1 input for a VFD Grundfos Direct Sensor™
Heat quantity measurement
Commissioning menu
3 basic system layouts to choose from (DeltaSol® CS/4 only)
Function control
Tube collector function, thermal disinfection (DeltaSol® CS/4 only)
Drainback option
4 relay outputs (incl. 1 potential-free extra-low voltage relay)
4 inputs for Pt1000, Pt500 or KTY temperature sensors
Input for 1 analogue Grundfos Direct Sensor™
1 V40 impulse input (also usable as a Pt1000, Pt500 or KTY temperature sensor input)
2 PWM outputs for the speed control of high-efficiency pumps
27 basic system layouts with up to 3 hydraulic variants each to choose from
Automatic function control according to VDI 2169
For the speed control of high-efficiency pumps
1 input for a VFD Grundfos Direct Sensor™
Heat quantity measurement
Commissioning menu
10 basic system layouts to choose from
Function control
Optional thermal disinfection function
2 relay outputs, 4 temperature sensor inputs
2 PWM outputs for the speed control of high-efficiency pumps
Control of an electronic mixer for the return mixing function
Heating backup
Heat exchange function
Thermostatic backup heating
Heat pump demand (optional)
5 relay outputs and 8 inputs for Pt1000, Pt500 or KTY temperature sensors
Up to 2 extension modules via RESOL VBus® (21 sensors and 15 relays in total)
Inputs for digital Grundfos Direct SensorsTM as well as for FRHd humidity sensors
Integrated control of up to 2 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
Dew point calculation by means of the FRHd humidity sensor to avoid condensation
