Hygienic buffer tank HSK-OEKO
Heat buffer tank with integrated stainless steel corrugated tube for legionella safe preparation of DHW, with well dimensioned heat exchangers out of circular tube, improved layering of the heating return line in the stratification pipe. Perfectly suitable for single and two family houses. Available standard sizes 700 und 1000 litres, each type with one stainless steel heat exchanger and two solar heat exchangers.
The cost efficient „HSK OEKO“ with integrated stainless steel corrugated hose for the
preparation of DHW, is perfectly suitable for the economical application in single and two family
houses. It convinces with its versatility just as much as the exclusive version „HSK-SLS“. Almost all
heat generators, e.g. solar panels, oil/gas boilers, wood log boilers, electric heating elements, pellet
boiler, etc. as well as the energy consumers (hot water and heating) can be operated by one single
tank. Even though the buffer system is that multifunctional the effort of controlling the tank is kept
very simple because all connections are constructed in such a way that each heat generator and
consumer connected to the tank can operate absolutely independent, according to requirement
and availability.
The DHW is freshly heated up by the corrugated stainless steel hose coiled in the tank. The
advantages of a boiler and a continuous flow heater are cleverly combined in this system. An
extremely fast heat transmittance from solar energy to hot water is achieved by an additional plain
tube heat exchanger in the upper part of the tank.
The corrugated design precludes the calcification of the DHW. The heat exchanger insignificantly
expands itself during heating up and cooling and thus limescale deposits are avoided as far as
possible. During the removal the corrugated design causes velocity. These turbulences enable the
washing out of the limescale particles together with the hot water. When necessary the stainless
steel DHW heat exchanger could be rinsed with a suitable descaler. As you can see the cost efficient
version „HSK-ÖKO“ with its outstanding quality sticks out of the wide range of conventional HSK
tanks.
- connections arranged in 90° angle, possible installation in the corner
- various connection possibilities
- perfect heat stratification due to the stratification pipe
- insulation thickness 100 mm, available either as fleece ISO-B1 or flexible foam insulation
- high quality steel S235JR
- large solar heat exchangers
- legionella-safe DHW preparation
- stainless steel corrugated hose 1.4404 with DVGW authorization
- high hot water output
- installation of an electric heating element possible
| Hygienic buffer tank HSK-OEKO | 700 | 1000 | |
| nominal capacity | L | 674 | 913 |
| height with insulation [A] | mm | 1690 | 2090 |
| height without insulation [B] | mm | 1610 | 2010 |
| tilted height | mm | 1795 | 2040 |
| diameter with insulation [C] | mm | 990 | 990 |
| diameter without insulation [D] | mm | 790 | 790 |
| insulation thickness | mm | 100 | 100 |
| weight | kg | 185 | 240 |
| max. operating temperature heating water | bar | 6 | 6 |
| max. operating pressure heating water | °C | 95 | 95 |
| max. size of electric heating element (optional) | kW | 6 | 6 |
| standby heat loss according to EN 12897:2006, with fleece insulation ISO-B1 |
700 | 1000 | |
| standby heat loss | W | 115 | 128 |
| energy efficiency class | W | -- | -- |
| standby heat loss according to EN 12897:2006, with flexible foam insulation |
700 | 1000 | |
| standby heat loss | W | 139 | 147 |
| energy efficiency class | W | -- | -- |
| specifications stainless steel DHW heat exchanger | 700 | 1000 | |
| capacity | L | 39 | 39 |
| heating surface | m² | 5,64 | 5,64 |
| continuous tap output at 17 kW, TSP 65°C | CW 10°C/HW 45°C | L/h | 426 | 426 |
| continuous tap output at 27 kW, TSP 65°C | CW 10°C/HW 45°C | L/h | 670 | 670 |
| continuous tap output at 50 kW, TSP 65°C | CW 10°C/HW 45°C | L/h | 1200 | 1200 |
| Ø stainless steel DHW heat exchanger | mm | 32 | 32 |
| max. operating pressure DHW heat exchanger | bar | 6 | 6 |
| max. operating temperature DHW heat exchanger | °C | 95 | 95 |
| pressure drop (2 m³/h) | °C | 130 | 130 |
| specification solar heat exchangers | 700 | 1000 | |
| heating surface top | m² | 1,6 | 2,0 |
| capacity top | L | 6,8 | 8,0 |
| pressure drop top (2 m³/h) | mbar | 97 | 117 |
| heating surface bottom | m² | 2,5 | 2,8 |
| capacity solar bottom | L | 14,1 | 15,1 |
| pressure drop bottom (2 m³/h) | mbar | 143 | 163 |
| max. operating pressure | bar | 10 | 10 |
| max. operating temperature | °C | 110 | 110 |
| recommended min. collector surface | m² | 14 | 17 |
| connections with dimensioning | 700 | 1000 | |
| [1] de-airing (Rp 1″) | top | top | |
| [2] hot water (Rp 1″) | mm | 1370 | 1760 |
| [3] solar flow inlet, top (Rp 1″) | mm | 1270 | 1610 |
| [4] sensor/thermometer (Rp ½″) | mm | 1220 | 1550 |
| [5] sensor solar, top (Rp ½″) | mm | 1150 | 1400 |
| [6] sensor/thermometer (Rp ½″) | mm | 1060 | 1300 |
| [7] solar return, top (Rp 1″) | mm | 970 | 1230 |
| [8] electric heating element (Rp 1 ½″) | mm | 900 | 1100 |
| [9] sensor/thermometer (Rp ½″) | mm | 730 | 1040 |
| [10] solar flow inlet, bottom (Rp 1″) | mm | 830 | 940 |
| [11] sensor/thermometer (Rp ½″) | mm | 550 | 640 |
| [12] sensor solar, bottom (Rp ½″) | mm | 480 | 480 |
| [13] solar return, bottom (Rp 1″) | mm | 370 | 380 |
| [14] cold water (Rp 1″) | mm | 270 | 280 |
| [15] heating return (Rp 1″) | mm | 170 | 170 |
| [16] wood log boiler return (Rp 1″) | mm | 360 | 360 |
| [17] not occupied (Rp 1″) | mm | 560 | 560 |
| [18] oil/gas boiler return (Rp 1″) | mm | 810 | 870 |
| [19] heating flow (Rp 1″) | mm | 980 | 1190 |
| [20] boiler flow (Rp 1″) | mm | 1120 | 1410 |
| [21] boiler flow (Rp 1″) | mm | 1290 | 1650 |
Manufacturing tolerance according to DIN ISO 13920 C
Please take the instructions for installation/start up/maintenance from the relevant operation manuals
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