System code number 4.2
Weather-compensated flow temperature control with variable limitation of the return flow tem-
perature and drinking water heating from the primary circuit with differential temperature con-
trol for solar-powered heating of the drinking water tank.
The difference to the system code number 4.1 is that the additional heating remains active even
during the operation of the solar circuit pumps, provided their time schedule allows it.
Solar collector
Fig. 19
⋅
Anl 4.2
(system code number 4.2)
28
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