Hygienic stratification buffer tank HSK-SLS
Heating buffer tank with integrated big stainless steel corrugated tube for legionella safe preparation of DHW, with large dimensioned oval tube heat exchangers. The area of application ranges from single-family houses to hotels and industrial buildings. Available standard sizes 500, 800, 1000, 1250, 1500 und 2200 litres, each type with one stainless steel heat exchanger and two solar heat exchangers. The HSK exclusive version - highest efficiency of solar input and tap water output. With patented thermo-hydraulic stratification system SLS® - unique in its category!
The hygienic stratification buffer tank HSK-SLS, with integrated Spiro-HT-stainless steel DHW heat exchanger,
is perfectly suitable for the preparation of hygienic tap hot water. You will achieve excellent performance
values due to the Spiro-HT-technology, which qualifies the tank for either high performance or heat
pump installations.
It also qualifies for the integration of versatile heat sources with its patented thermo-hydraulic
stratification system SLS®. The heat management can be realized with very low control effort due
to its exact stratification characteristics. The integration of thermal solar energy via the two very
large dimensioned oval solar heat exchanger provides for a heat transmission that optimizes the
efficiency factor of the solar panels.
Established systems are combined in a smart way. The hygienic stratification buffer tank HSK-SLS is
therefore the perfect heat center for new buildings, as well as for renovations of old buildings. The
high DHW output qualifies the tank for the application in single family as well as in multifamily
houses. An intelligent hydraulic connection of several hygienic stratification buffer tanks HSK-SLS
even enable the application in large scale plants as well as housing blocks, hotels and diverse
industrial objects.
In the hygienic stratification buffer tank HSK-SLS our established Solarbayer‐specific HSK system is
combined with the patented stratification system SLS®.
- versatile connection possibilities
- perfect heat stratification due to the patented stratification system SLS®
- insulation thickness 100 mm, available either as fleece ISO-B1 or flexible foam insulation
- high quality steel S235JR
- large dimensioned solar oval tube exchanger, top and bottom
- legionella-safe hygienic DHW preparation
- stainless steel corrugated hose 1.4404 with DVGW authorization
- high tap hot water output
- installation of an electric heating element possible
| Hygienic straticification buffer tank HSK-SLS | 500 | 800 | 1000 | 1250 | 1500 | 2200 | |
| nominal capacity | L | 492 | 788 | 926 | 1123 | 1422 | 2204 |
| height with insulation [A] | mm | 1720 | 1910 | 2090 | 2080 | 2220 | 2170 |
| height without insulation [B] | mm | 1645 | 1835 | 2015 | 2005 | 2145 | 2095 |
| tilted height | mm | 1700 | 1950 | 2100 | 2130 | 2250 | 2300 |
| diameter with insulation [C] | mm | 850 | 990 | 990 | 1100 | 1200 | 1450 |
| diameter without insulation [D] | mm | 650 | 790 | 790 | 900 | 1000 | 1250 |
| insulation thickness | mm | 100 | 100 | 100 | 100 | 100 | 100 |
| weight approx. | kg | 158 | 214 | 240 | 290 | 302 | 413 |
| max. operating temperature buffer tank | °C | 95 | 95 | 95 | 95 | 95 | 95 |
| max. operating pressure buffer tank | bar | 6 | 6 | 6 | 6 | 6 | 6 |
| max. size of electric heating element (optional) | kW | 4,5 | 6 | 6 | 6 | 9 | 9 |
| stand-by heat loss according to EN 12897:2006, with fleece insulation ISO-B1 |
500 | 800 | 1000 | 1250 | 1500 | 2200 | |
| standby heat loss | W | 103 | 123 | 132 | 149 | 166 | 205 |
| energy efficiency class | C | -- | -- | -- | -- | -- | |
| efficiency label |  |
-- | -- | -- | -- | -- |
| stand-by heat loss according to EN 12897:2006, with flexible foam insulation |
500 | 800 | 1000 | 1250 | 1500 | 2200 | |
| standby heat loss | W | 118 | 141 | 152 | 172 | 201 | 243 |
| energy efficiency class | D | -- | -- | -- | -- | -- | |
| efficiency label | |
-- | -- | -- | -- | -- |
| specifications stainless steel DHW heat exchanger | 500 | 800 | 1000 | 1250 | 1500 | 2200 | |
| capacity DHW | L | 75 | 96 | 96 | 111 | 111 | 126 |
| heating surface | m² | 7,2 | 9,0 | 9,0 | 10,5 | 10,5 | 12 |
| continuous tap output at 17 kW, TSP 65°C | CW 10°C/HW 45°C | L/h | 480 | 510 | 510 | 522 | 522 | 540 |
| continuous tap output at 27 kW, TSP 65°C | CW 10°C/HW 45°C | L/h | 685 | 735 | 735 | 750 | 750 | 790 |
| continuous tap output at 50 kW, TSP 65°C | CW 10°C/HW 45°C | L/h | 1090 | 1345 | 1345 | 1380 | 1380 | 1465 |
| Ø stainless steel DHW heat exchanger | mm | 48 | 48 | 48 | 48 | 48 | 48 |
| max. operating pressure DHW heat exchanger | bar | 8 | 8 | 8 | 8 | 8 | 8 |
| max. operating temperature DHW heat exchanger | °C | 95 | 95 | 95 | 95 | 95 | 95 |
| pressure drop (2 m³/h) | mbar | 67 | 104 | 104 | 128 | 128 | 158 |
| specifications solar heat exchanger top | 500 | 800 | 1000 | 1250 | 1500 | 2200 | |
| heating surface solar heat exchanger top | m² | 1,3 | 2 | 3 | 3 | 3,5 | 4,2 |
| capacity solar heat exchanger top | L | 6,2 | 8 | 12 | 12 | 14 | 16,8 |
| pressure drop heat exchanger top (2 m³/h) | mbar | 69 | 88 | 111 | 111 | 156 | 179 |
| heating surface solar heat exchanger bottom | m² | 2,3 | 3 | 3 | 3 | 3 | 5,5 |
| capacity solar heat exchanger bottom | L | 10,4 | 12 | 12 | 12 | 12 | 22 |
| pressure drop heat exchanger bottom (2 m³/h) | mbar | 70 | 112 | 112 | 112 | 112 | 214 |
| max. operating pressure | bar | 10 | 10 | 10 | 10 | 10 | 10 |
| max. operating temperature | °C | 110 | 110 | 110 | 110 | 110 | 110 |
| recommended min. collector surface | m² | 10 | 14 | 17 | 20 | 23 | 31 |
| connections with dimensioning | 500 | 800 | 1000 | 1250 | 1500 | 2200 | |
| [1] de-airing (Rp 1 ½″) | top | top | top | top | top | top | |
| [2] sensor (Rp ½″) | oben | oben | oben | oben | oben | oben | |
| [3] flow line boiler/heating (Rp 1 ½″, Rp 2″ *) | mm | 1510 | 1690 | 1870 | 1835 | 1935 | 1850 |
| [4] flow line boiler/heating (Rp 1 ½″, Rp 2″ *) | mm | 1510 | 1690 | 1870 | 1835 | 1935 | 1850 |
| [5] sensor/thermometer (Rp ½″) | mm | 1420 | 1590 | 1770 | 1735 | 1835 | 1845 |
| [6] hot water outlet (Rp 1 ¼″) | mm | 1410 | 1580 | 1760 | 1725 | 1825 | 1835 |
| [7] flow solar top (Rp 1″) | mm | 1320 | 1440 | 1650 | 1585 | 1735 | 1735 |
| [8] sensor solar top (Rp ½″) | mm | 1220 | 1290 | 1370 | 1405 | 1435 | 1445 |
| [9] return solar top (Rp 1″) | mm | 1120 | 1160 | 1270 | 1165 | 1235 | 1295 |
| [10] electric heating element (Rp 1 ½″) | mm | 1000 | 1060 | 1140 | 1045 | 1125 | 1175 |
| [11] flow boiler/heating (Rp 1 ½″) | mm | 900 | 930 | 1100 | 885 | 1075 | 1130 |
| [12] flow boiler/heating (Rp 1 ½″) | mm | 900 | 930 | 1100 | 885 | 1075 | 1130 |
| [13] flow solar bottom (Rp 1″) | mm | 800 | 830 | 990 | 765 | 935 | 1045 |
| [14] return boiler/heating (Rp 1 ½″) | mm | 670 | 730 | 890 | 665 | 835 | 925 |
| [15] return boiler/heating (Rp 1 ½″) | mm | 670 | 730 | 890 | 665 | 835 | 925 |
| [16] sensor/thermometer (Rp ½″) | mm | 670 | 730 | 770 | 665 | 835 | 845 |
| [17] solar sensor bottom (Rp ½″) | mm | 440 | 470 | 470 | 495 | 535 | 545 |
| [18] return solar bottom (Rp 1″) | mm | 340 | 370 | 370 | 395 | 435 | 445 |
| [19] cold water inlet (Rp 1 ¼″) | mm | 240 | 270 | 270 | 295 | 335 | 335 |
| [20] return boiler/heating (Rp 1 ½″, Rp 2″ *) | mm | 150 | 170 | 170 | 195 | 235 | 320 |
| [21] return boiler/heating (Rp 1 ½″, Rp 2″ *) | mm | 150 | 170 | 170 | 195 | 235 | 320 |
* from HSK-SLS 2200 on the connections are Rp 2″
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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