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Solar Water Heaters

Thermosiphon system Simple and efficient hot water heating.

A solar hot water system that attracts attention thanks to its fast installation, minimal maintenance requirement and high efficiency.

Thermosiphon system Simple and efficient hot water heating A solar hot water system that attracts attention thanks to its fast installation, minimal maintenance requirement and high efficiency. The system operates on the thermosiphon principle, meaning that heat transfer occurs entirely by means of natural convection, without pumps and control units. The solar fluid heated in the collector rises and transfers heat through a highly efficient jacketed shell and tube system, with riser to ensure optimum stratification, to the drinking water in the enamelled tank. High-selectivity harp absorbers are used to guarantee the highest possible solar yield in this system.

Product Description

Collector

Modular flat collector with aluminium frame and laser-welded full-area absorber with high-selectivity coating and meandering flow guarantees the best solar yield


Tank

Enamelled hot water tank with heat exchanger with jacketed shell, unique with two risers for optimal solar charging and hot water output. Two integrated sacrificial magnesium anodes. Electrical secondary heating can be retrofitted.


Frame

The galvanised steel profiles allow upright or parallel roof installation. Thanks to the special design the frame can be quickly and easily erected and has a high load bearing capacity


Piping and accessories

The thermosiphon system comprises all pre-insulated pipes and fittings required for installation. All necessary pressure relief valves and frost protection are included with delivery.


Covers

The piping is additionally protected and the system's appearance optimised by two lateral piping ducts and a front cover.

Product overview

Thermosiphon system:
Thermosiphon systems are systems for producing heat from solar energy operating on the thermosiphon principle. The thermosiphon is a passive design, which allows heat transfer using natural convection ideally in a vertical, closed fluid loop. The advantage is that it avoids using a conventional pump, which keeps the complexity and costs of a thermosiphon system low. The thermosiphon system is available in three designs. They are characterised by high-selectivity coated harp absorbers and tank sizes perfectly coordinated with the system, together with unique charging properties. All necessary pipes, fittings and frost protection are included with delivery.

Areas of Use
  • Parallel roof and free-standing installation

Product Benefits
  • Solar-Keymark system test EN 12976
  • High efficiency thanks to high-selectivity coated absorber
  • Laser-welded, harp system
  • Long service life, robust, temperature- and weather-resistant design
  • Low heat loss thanks to excellent tank insulation
  • Quick and simple installation
  • No additional costs for pumps, solar station, etc.
  • No solar control unit required
  • Compact and space-saving design
  • All necessary pipes, fittings, pressure relief valves and frost protection are included with delivery
Thermosiphon connection diagram

Specifications

DesignationLightsTHSY160 1HTHSY200 1H THSY300 2H
Corrugated stainless-steel pipe Nominal size DN 20 DN 20 DN 20
Flow length 320 mm 320 mm 320 mm
Return length 210 mm 210 mm 210 mm
Connections 3/4“ union nut 3/4“ union nut 3/4“ union nut
Flat seal 4 x AFM 34 4 x AFM 34 4 x AFM 34
Insulation Rubber with protective film Rubber with protective film Rubber with protective film
Insulation thickness 20 mm 20 mm 20 mm
Solar pressure relief valve Installation location Central sleeve on top of tank
Connection ½“
Max. press. 3 bar
Pressure relief valve domestic hot water side Installation location Cold water connection
Connection ½“
Max. press. 6 bar
Characteristics Integrated check valve
T-p pressure relief valve Installation location Cold water connection
Connection ½“
Max. temp. 6 bar
Max. press. Integrated check valve
Characteristics Temperature control to 94 °C to DIN 4708 (95 °C)
Glycol Min. level 20% 20% 20%
Constituent Propylene glycol + inhibitors Propylene glycol + inhibitors Propylene glycol + inhibitors
Appearance Colourless liq Colourless liq Colourless liq
Delivered quantity 3 l in 1 l packages 4 l in 1 l packages 5 l in 1 l packages
Solar collector Quantity 1 2
Dimensions 1,030 x 2,030 mm 1,030 x 2,030 mm
Gross area 2.09 m² 2 x 2.09 m²
Aperture area 1.92 m² 2 x 1.92 m²
Coating High-selectivity High-selectivity
Absorber type Harp Harp
Header Cu 22 mm Cu 22 mm
Rear wall insulation 40 mm mineral wool with fleece cover layer 40 mm mineral wool with fleece
Side insulation 20 mm mineral wool with fleece cover layer 20 mm mineral wool with fleece
Tank Contents 145 l 192 l 282 l
Diameter 500 mm 580 mm 580 mm
Length 1,250 mm 1,250 mm 1,750 mm
Max. operating pressure 10 bar 10 bar 10 bar
Recommended operating pressure 6 bar 6 bar 6 bar
Max. press. solar 3 bar 3 bar 3 bar
Max. temp. 94 °C 94 °C 94 °C
Insulating material Rigid polyurethane foam Rigid polyurethane foam Rigid polyurethane foam
Insulation thickness 40 mm 40 mm 40 mm
Connections ½“ ½“ ½“
Inner coating Enamelled Enamelled Enamelled
Corrosion protection 2 x magnesium anode 2 x magnesium anode 2 x magnesium anode
Heat exchanger Jacketed shell Jacketed shell Jacketed shell
Heat exchanger area 0.975 m2 1.161 m2 1.57 m2
Empty weight 67 kg 85 kg 107 kg
Full weight 212 kg 277 kg 367 kg
Frame Material Steel
Thickness 3 mm
Manufactured Lasered
Corrosion protection Galvanised
Use Elevated and parallel roof installation
Connections Collector Compression fitting dia. 22 mm
Tank ½“, with double nipple and elbow to ¾“ for solar connection
Copper pipe Length 2,000 mm
Diameter Dia. 22 mm
Insulating material Elastomer rubber with protective PE film
Insulation thickness 20 mm