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The main risk with a drainable solar water heater is the freezing of the collector(s). To limit this risk, several rules must be followed:
If these rules are difficult to follow, it is better to opt for a self-draining glycol-based solar system or a pressurized solar system.
The Heliofrance self-draining solar kit consists of:
Start saving energy now with your individual solar water heater (CESI), by taking advantage of a renewable heat source.
The water stored in the tank remains constant. It is used for heat storage and is referred to as "dead water." Annual (or even biannual) top-ups of water constitute the bulk of the system's maintenance.
When hot water is drawn, the cold water entering the tank passes through an exchanger immersed in the hot storage water, it is heated and sent to the point of draw-off.
The volume of domestic hot water stored (only that present in the exchanger) is therefore very small and its quality is not degraded as it could be after too long a storage period.
The tank starts charging with solar calories when the temperature probe located on the sensors indicates a sufficient temperature that is higher than the temperature of the storage water at the bottom of the tank.
The circulator starts up and sends the water from the storage tank into the sensors and the water heats up.
When the tank temperature reaches its maximum value or when it becomes higher than the temperature of the sensors, the pump stops and the stored water flows back down into the tank by gravity.
Thus, when the tank is sufficiently hot, or when the sensors are colder than the tank, or when there is frost or a power outage, the circulator does not operate, the sensors are empty of water, and the system is secure.
The 300L tank volume, which includes a reserve of approximately 200L of water heated by the hydraulic or electric backup when necessary, is well suited to a family of 4 to 5 people.
The collector surface area of 2.7 m² to 5.2 m² allows for covering 40 to 60% of the household's domestic hot water needs, depending on:
Choosing the right solar water heater
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H 232 | |
| Overall dimensions (mm) | 1870 x 1241 x 90 |
| Gross area | 2.32 m² |
| Optical/absorber surfaces | 2.20 m² |
| Empty weight | 41 kg |
| Fluid content | 1.8 liters |
| Absorber performance ** | 0.848; 3.298; 0.037 |
V 232 | |
| Overall dimensions (mm) | 1241 x 1870 x 90 |
| Gross area | 2.32 m² |
| Optical/absorber surfaces | 2.20 m² |
| Empty weight | 40 kg |
| Fluid content | 1.4 liters |
| Absorber performance ** | 0.817; 4.989; 0.0048 |
H 272 | |
| Overall dimensions (mm) | 2192 x 1241 x 90 |
| Gross area | 2.72 m² |
| Optical/absorber surfaces | 2.60 m² |
| Empty weight | 47 kg |
| Fluid content | 2.10 liters |
| Absorber performance ** | 0.848; 3.298; 0.037 |
| Overall dimensions (mm) | 1241 x 2192 x 90 |
| Gross area | 2.72 m² |
| Optical/absorber surfaces | 2.60 m² |
| Empty weight | 46 kg |
| Fluid content | 1.6 liters |
| Absorber performance ** | 0.817; 4.989; 0.0048 |
** η0 ; a1 (Wm‾ ² K‾ ¹); a2 (Wm‾ ² K‾ ²)
Common characteristics | |
| Minimum - maximum tilt | From 20° to 90° in gravity drainage, from 0° to 90° under pressure |
| Maximum operating pressure. | 4 bar |
| Test pressure | 300 bar |
| Stagnation temperature | 189 °C |
| Glazing | Tempered - 4mm thick, anti-reflective, 96% transparency |
| Absorption coefficient | 95% |
| IR emissivity coefficient | 5% |
| Hydraulic fittings | Reversible side fittings with brass double-cone connection, 12 mm outer diameter, reinforced |
| Sensor housing | Aluminum profile welded at the corners |
| Guarantee | 10 years |
The ball:
The tank is compact (67cm wide x 55cm deep x 180cm high). Connections are made on the top of the tank, which is the most practical installation format. This requires planning ahead for the tank's location to allow for top-mounted hydraulic connections, while ensuring that the solar connection linking the collectors to the tank maintains a minimum 4% slope without creating a back slope.
The tank is delivered pre-equipped and ready to connect.
The sensors:
They are specific to self-draining systems because they allow all the water to drain by gravity. They are supplied with mounting accessories for roof mounting or for use with a 45° frame. They are also referred to as panels.
The solar connection:
The solar connection is supplied as an option with the kit. Indeed, site coordination often requires that the solar connection be installed before the tank and collector(s) are fitted. This solar connection must consist of two insulated copper or stainless steel pipes with a diameter of 12 mm, installed with a minimum slope of 4%. Avoid any negative slope to ensure that the water drains from the collectors by gravity.
The maximum recommended cable length is 15 m to match the circulator's power (for any other configuration, please contact us). It is advisable to run the probe's electrical cable and the ground wire with the solar connection. Similarly, it is preferable to use copper busbar or, failing that, a straight support if using copper.annealed or corrugated stainless steel.
Heliofrance is located in Berat near Toulouse. It is a French SME that has specialized in the production of solar thermal solutions since 2008.
It's a human-sized company, close to its clients and users. This provides them with fast, high-quality solutions for their utmost satisfaction.
Heliofrance designs and manufactures its range of solar thermal collectors, synthetic accumulators, and regulators. The company owns its production equipment (cutting, assembly, bending, welding, bonding, foaming) and guarantees maximum performance and warranties for all its products.
Think about it, lacentrale-eco is a permanent stock of Heliofrance solar water heaters in Lyon .
More information
Electric heater for heating domestic hot water in the absence of sun and hydraulic backup.
Pre-insulated copper bitube solar connection. The tubes can be separated.
15mm thick insulation with thermal conductivity equal to 0.036 W/mK
The solar connection must be installed on a linear fixing support (wooden cleat or metal rail type)
Pre-insulated copper bitube solar connection. The tubes can be separated.
15mm thick insulation with thermal conductivity equal to 0.036 W/mK
The solar connection must be installed on a linear fixing support (wooden cleat or metal rail type)
Pre-insulated copper bitube solar connection. The tubes can be separated.
15mm thick insulation with thermal conductivity equal to 0.036 W/mK
The solar connection must be installed on a linear fixing support (wooden cleat or metal rail type)
Pre-insulated copper bitube solar connection. The tubes can be separated.
15mm thick insulation with thermal conductivity equal to 0.036 W/mK
The solar connection must be installed on a linear fixing support (wooden cleat or metal rail type)
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Chauffe eau solaire HELIOFRANCE - Ballon autovidangeable
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