Solar Control Systems

The RESOL DeltaSol® BS Plus system controller is for standard solar thermal systems with 2 standard-relays allowing control of two zones such as water and AUX heating zone such as a solar pool heater or a dissipation loop. It has an additional aqua stat function preprogrammed for different hydraulic layouts and is equipped with energy metering.

1. Illuminated system-monitoring-display
2. Up to 4 temperature sensors Pt1000
3. 2 standard-relay outputs and two tanks and two collector fields
4. 9 basic layouts are selectable
5. Heat balancing, tube collector function
6. Energy metering
7. Function control
8. Programming and remote control of the system via RESOL Service Center Software possible
9. RESOL VBus®
10. Real Time Clock (timer function)
11. Aqua stat function
12. Emergency shut down and cooling function
13. System Cooling & Collector Cooling
14. Freeze protection
15. Vacuum tube collector function

The RESOL MX Controller is the most advanced hydronic controller in the industry. It is designed from complex heating system that have multiple zones and can manage 14 relay outputs and 15 sensor inputs and an additional 5 expansion modules can extend its capacity. Remote management is possible through the Vbus.net platform. New V2.0 includes hydronic radiant floor cooling. Easy combination and parameterisation of pre-programmed functions for several millions of hydraulic variants.

1. 14 relay outputs and 12 inputs for Pt1000, Pt500 or KTY temperature sensors
2. Up to 5 extension modules via RESOL VBus® (45 sensors and 39 relays in total)
3. Inputs for analogue and digital Grundfos Direct Sensors™
4. Integrated control of up to 4 high-efficiency pumps via PWM outputs
5. Data logging, storing, easy transfer of controller adjustments prepared and firmware updates via SD card
6. Cooling over the heating circuit with condensation detection by means of a dew point switch
7. Simplified timer, 0-10 V boiler control and DHW preheating
8. Remote access to the heating circuits with room control unit(s) or the VBus®Touch HC App
9. Extended optional functions, e.g. solid fuel boiler function with mixer and target temperature control

1. All medium-bearing parts are made of brass
2. Integrated BS Plus Controller
3. All connections 3/4“ female
4. With Pre-assembled steel wall bracket
5. Full port ball valve in return pipe is noise-free, low pressure drop, manual opener for faster line drain service, spring-actuated - special design for solar thermal applications
6. Large ball valve handles for easy grip, and visible closing position
7. Air-Scoop in the supply line for a permanent degassing of the heat transfer medium
8. Function-optimized design insulation made of durable elastic EPP; 100% insulation of the fittings - excellent pump ventilation and cooling
9. Solar safety assembly Pressure relief valve 86 PSI high-temperature manometer 0 - 90 PSI with Drain valve for flushing and filling, flat sealing connection for expansion tank
10. Full metal solar thermometer, 32-320°F (0 - 160°C) can be pulled-off, with immersion sleeve being integrated in the ball valve
11. Fully assembled with flat sealing union connections at most joints
12. Pump can be isolated for servicing
13. Flow meter Flow quantity measuring device with balancing valve, 1-13 l/m
14. Flushing and draining unit integrated Two drain valves (at the Flow meter and at the safety group) enable the filling and flushing of the system
15. Wilo Star 3 speed pump S21

1. All medium-bearing parts are made of brass
2. All connections 1/2“ female
3. With Pre-assembled steel wall bracket,
4. Full port ball valve in return pipe is noise-free, low pressure drop, manual opener for faster line drain service, spring-actuated - special design for solar thermal applications
5. Large ball valve handles for easy grip, and visible closing position
6. Air-Scoop in the supply line for a permanent degassing of the heat transfer medium
7. Function-optimized design insulation made of durable elastic EPP; 100% insulation of the fittings - excellent pump ventilation and cooling
8. Solar safety assembly Pressure relief valve 86 PSI high-temperature manometer 0 - 90 PSI with Drain valve for flushing and filling, flat sealing connection for expansion tank
9. Integrated solar thermometer and Pressure guage, 32-320°F (0 - 160°C) can be pulled-off, with immersion sleeve being integrated in the ball valve
10. Pump can be isolated for servicing
11. Flow meter Flow quantity measuring device with balancing valve, 1-13 l/m
12. Flushing and draining unit integrated Two drain valves (at the Flow meter and at the safety group) enable the filling and flushing of the system
13. Wilo Star 3 speed pump S16