Maryland Solar Water Heating Package

All-inclusive solar system for use in all climates






NOTE: The information presented in this page is for guidance only - no part of this may be used for any agreement, whether expressed or implied, or to form any contract. THERMO TECHNOLOGIES reserves the right to change specifications and prices without prior notice.

Solar Pump Control Unit

30 Tube VM VM Collector

1. Collector 7. Check Valve 13. Pressure Gauge
2. Collector Sensor 8. Hose Bibs for Filling and Flushing 14. Collector Supply
3. Manual Air Valve 9. Expansion Tank 15. Heat Exchange Coil
4. Hot Water to Taps 10. Air Scoop &  Air Vent 16. Solar Hot Water Tank
5 .Tempering Valve 11. Circulating Pump with flanges or couplings 17. Immersion Heater
6. Collector Return 12. Pressure Relief Valve 18. Controller


  • The Controller (18) will switch on the pump when the temperature at the collector sensor TC is higher than the return temperature TR by at least the pre selected amount.

  • The pump circulates a heat transfer fluid around the loop.

  • Heat from the collector is transferred to the storage tank through the heat exchange coil.

  • With the pump running, if delta T is less than preset value, the pump will switch off.

  • When a preset tank temperature is reached at TMAX, the controller can switch off the pump.

  • The check valve (non-return valve) prevents heat from the tank rising towards the collector should the tank be warmer (e.g. at night).

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