187 1 4 3 2 System diagram: Daikin Altherma 3 R ECH2O with solar thermal 1 Use of solar energy for domestic hot water and central heating 2 External heat pump unit 3 Solar thermal collectors 4 Solar pump station Stainless steel heat exchanger for hot water production Controller display Polypropylene casing with polyurethane insulation Pump Plate heat exchanger Utilisation of solar energy for domestic hot water and central heating Heat pump (environmental heat) Auxiliary energy (electricity) 2,500 2,000 1,500 1,000 500 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec kWh Monthly energy consumption of an average detached house Pressureless (drain‑back) solar system (EHSH-E, EHSX-E) J The solar collectors are only filled with water when sufficient heating is provided by the sun J The pumps in the control and pump unit switch on briefly and fill the collectors with storage tank water J After filling, water circulation is maintained by the remaining pump 1,891 mm = 300 L 1,895 mm = 500 L 625 mm = 300 L 790 mm = 500 L 595 mm = 300 L 790 mm = 500 L Floor standing unit with integrated ECH2O tank Floor standing air-to-water heat pump for heating and hot water with thermal solar suport: EHSH units Floor standing air-to-water heat pump for bivalent heating and hot water with thermal solar suport: EHSHB units Floor standing air-to-water heat pump for heating, cooling and hot water with thermal solar suport: EHSX units Floor standing air-to-water heat pump for bivalent heating, cooling and hot water with thermal solar suport: EHSXB units Pressurised solar system (EHSHB-E, EHSXB-E) J System is filled with heat transfer fluid with the correct amount of antifreeze to avoid freezing in winter J System is pressurised and sealed
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