The DrainBloC® is a compact and completely premounted group of fittings for automatic draining of the solar circuit. As soon as the pump of the DrainBloC® is switched off, the collector field runs empty and the solar fluid is collected in the integrated container.
When the pump starts running, the solar fluid is transported from the container to the collector field and the heat is transferred to the storage tank.
An overheating of the solar fluid is reliably impeded and stagnation simply can not form. There is no problem with frost as the pump is switched off and the collector field runs empty.
The DrainBloC® can be filled and operated with pure water. Water has sevaral advantages
compared to conventional solar fluids:
- better heat transfer
- higher heat capacity
- lower and more constant viscosity
- lowest pressure loss in the pipes
- water is an environmentally benign fluid
As the DrainBloC® is a closed system, corrosion will not occur.
An expansion tank is superfluous in the DrainBloC®. It is premounted for a simple installation and compact design at best operation performance.
Equipment:
- Solar controller SC2.8-DBC, already installed, preset and prewired
- Collector and storage tank temperature sensors
- PAW DrainBloC®-PWM pump, already installed and prewired
- Container made of stainless steel with visual level indication
- Flowmeter with inspection window
- Pressure gauge
- Design insulation with optimised function made of durable elastic EPP; 100 % insulation
of fittings, ventilation opening to cool the pumps
The intelligent system
As in conventional installations the control is based on temperature sensors at the collector and the storage tank. But the flow rate is additionally measured to allow heat quantity measurement. The measured flow rate also
serves to reliably check the fill level and the delivery rate.
The controller offers an automatic reduction of pump performance after start-up phase. During operation the PWM pump is speed-controlled and thus optimally adapted to the operating conditions of the installation. |
