Solar DHW tank SKL /

Inside enamelled solar domestic hot water tank for central hot water supply, two heat exchangers with big surface, prepared for auxiliary heating by an electrical element. Available standard sizes 200, 300, 400, 500, 750 und 1000 litres.

Perfectly aligned for solar systems

Hygiene in the high performance DHW tank SKL is guaranteed by heating up the special heat exchangers during solar operation. The high power solar exchanger is decisive for the performance of the solar system. The temperature in the solar return line of the SKL is up to 15°C lower than with regular DHW tanks and with their regular heat exchangers due to its arrangement far down of the tank. Thus, the efficiency factor of the solar system and the performance of the collectors is increased up to 15%.

Due to the supplementary heat exchanger, which is located in the upper part of the tank, the heating value is guaranteed even when heating up with a condensing boiler. Therefore, the DHW output capacity of our tanks is a lot higher than the output capacity of regular solar tanks. An interconnection of both heat exchangers is possible to get an high performance anti-legionella tank, p. ex. for the application with heat pumps or in the hotel industry.

Take advantage of these benefits

perfectly aligned for all solar systems
also suitable for condensing technology
twin coil tank, two plain tube heat exchangers (solar and heating)
high quality steel S235JR
internal corrosion protection with double enameling (Made in Germany)
magnesia anode installed
insulation for SKL 200 to SKL 500: PU rigid foam (non-removable), insulation thickness approx. 50 mm
insulation for SKL 750 and SKL 1000: removable flexible foam insulation WLG 0,039, insulation thickness approx. 75 mm
silver PVC jacket, fire protection classification: B2
installation of an electric heating element possible

Successful detail solutions

Technical specifications

Solar DHW tank SKL		200	300	400	500	750	1000
nominal capacity	L	209	305	411	454	740	926
height with insulation [A]	mm	1265	1515	1630	1805	1870	2120
height without insulation [B]	mm	-	-	-	-	1805	2055
tilted height	mm	1450	1650	1780	1960	1900	2150
diameter with insulation [C]	mm	610	650	700	750	950	950
diameter without insulation [D]	mm	-	-	-	-	790	790
insulation thickness non-removable solid foam	mm	50	50	50	50	-	-
insulation thickness removable solid foam	mm	-	-	-	-	80	80
jacket		PVC, silver
max. operating pressure tank	bar	10	10	10	10	10	10
max. operating temperature tank	°C	95	95	95	95	95	95
weight	kg	92	114	149	173	238	250
max. size of electric heating element (optional)	kW	4,5	4,5	4,5	6	9	9

standby heat loss according to EN 12897:2006		200	300	400	500	750	1000
standby heat loss	kWh/24h	1,42	1,68	1,97	2,18	3,17	3,48
energy efficiency class		B	B	C	C	--	--
heating label						--	--

specification heat exchanger top		200	300	400	500	750	1000
heating surface	m²	0,9	1,4	1,4	1,4	2,5	2,5
capacity	L	5,5	6,5	6,5	6,5	15	15
pressure drop (2 m³/h)	mbar	42	83	83	83	123	123
max. operating pressure	bar	10	10	10	10	10	10
max. operating temperature	°C	95	95	95	95	95	95

tap power output heat exchanger top		200	300	400	500	750	1000
continuous tap output at 17 kW (T_flow 70°C), CW 10°C/HW 45°C	L/h	351	617	662	702	813	869
Zapfleistung bei 27 kW (T_flow 70°C), CW 10°C/HW 45°C	L/h	490	890	935	975	1090	1145
Zapfleistung bei 50 kW (T_flow 70°C), CW 10°C/HW 45°C	L/h	788	1495	1535	1580	1690	1745
performance indicator N_L at 70/50 heat exchanger top	N_L	2,4	3,1	3,6	4,8	11,6	16,8
performance indicator N_L at 70/50 both heat exchangers	N_L	5,6	7,2	11,4	13,7	26,5	34,2

specification solar heat exchanger bottom		200	300	400	500	750	1000
heating surface	m²	0,9	1,8	2,2	2,4	2,5	2,5
capacity	L	5,5	8,3	10,5	13,5	15	15
pressure drop (2 m³/h)	mbar	43	98	109	135	136	136
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	4	6	8	10	14	17

connections with dimensioning		200	300	400	500	750	1000
[1] anode (from SKL 400 on an additional anode in the flange)		oben (1¼“)	oben (1¼“)	oben (1¼“)	oben (1¼“)	oben (1¼“)	oben (1¼“)
[2] hot water	mm	1165 (1“IG)	1345 (¾“IG)	1505 (¾“IG)	1640 (¾“IG)	1590 (1¼“IG)	1840 (1¼“IG)
[3] heating flow (inlet)	mm	995 (1¼“IG)	1245 (1“IG)	1355 (1“IG)	1510 (1“IG)	1440 (1¼“IG)	1440 (1¼“IG)
[4] thermometer	mm	930 (½“IG)	1200 (½“IG)	1300 (18x2)	1450 (18x2)	1460 (½“IG)	1680 (½“IG)
[5] tap water sensor	mm	915 (½“IG)	1080 (½“IG)	1125 (½“IG)	1285 (½“IG)	1340 (½“IG)	1340 (½“IG)
[6] circulation	mm	885 (¾“IG)	985 (¾“IG)	1030 (¾“IG)	1185 (¾“IG)	1235 (1“IG)	1235 (1“IG)
[7] heating return (outlet)	mm	680 (1¼“IG)	885 (1“IG)	935 (1“IG)	1060 (1“IG)	990 (1¼“IG)	990 (1¼“IG)
[8] electric heating element	mm	630 (1½“IG)	830 (1½“IG)	880 (1½“IG)	1010 (1½“IG)	890 (1½“IG)	890 (1½“IG)
[9] solar flow (inlet)	mm	580 (1¼“IG)	770 (¾“IG)	805 (¾“IG)	885 (¾“IG)	835 (1¼“IG)	835 (1¼“IG)
[10] solar sensor	mm	475 (½“IG)	400 (½“IG)	420 (½“IG)	370 (½“IG)	685 (½“IG)	685 (½“IG)
[11] flange Ø 114 mm (from SKL 400 on with addidional anode)	mm	260 -	400 -	420 (M8x30)	390 (M8x30)	400 (M8x30)	400 (M8x30)
[12] solar return (outlet)	mm	265 (1¼“IG)	245 (1“IG)	265 (1“IG)	285 (1“IG)	385 (1¼“IG)	385 (1¼“IG)
[13] cold water	mm	70 (1“IG)	145 (¾“IG)	110 (¾“IG)	165 (¾“IG)	220 (1¼“IG)	220 (1¼“IG)

SKL Typ 300, 400 und 500

SKL Typ 200, 750 und 1000

Manufacturing tolerance according to DIN ISO 13920 C
Please take the instructions for installation/start up/maintenance from the relevant operation manuals

Further product informations

Brochure
storage systems

PDF-file, 1.2 MB

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Manual
solar dhw tank SKL

PDF-file, 0.38 MB

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