Instructions

General Guidelines & Advice for Solar Water Heaters

The solar water heater reaches its peak performance approximately two days after installation. During these first two days, it is recommended to avoid using hot water, even if there is sunlight.

Check the level of the thermal fluid in the closed circuit annually.
(Caution: Do not top it up with any commercial thermal fluid. Contact us for instructions.)

In dusty areas, we recommend cleaning the collector glass every two months with water (in the evening) to remove the dust buildup.

If the collector glass breaks, it must be replaced immediately to prevent further damage.

For all solar water heaters, regulations require that valve operation is checked once a year.
We also recommend checking screws, nuts, wall plugs, bolts, and support brackets annually, especially if the system is installed near the sea.

During extended absences (e.g., summer vacations), it is advised to cover the collectors with an opaque cover.

Once the tank is filled with water, it should not be emptied for long periods, except when changing the magnesium anode or electric heating element, which require minimal time. Extended emptying can lead to cracks or detachment of the tank's internal protective lining.

In areas with hard water, installing a water filter is recommended.

If the water supply pressure exceeds 6 bar, a pressure reducer must be installed.

A. If the Solar Water Heater Does Not Provide Hot Water via the Sun

1. Carefully check all connections for leaks.

2. Check the fluid level in the closed circuit.

3. Ensure the connection pipes are not twisted or bent.

4. Make sure no air is trapped inside the collectors or tank.

5. Confirm that the solar water heater is installed horizontally.

6. Ensure that hot water supply is not mixed with cold water.

7. Check for slow leaks in household plumbing or faucets.

8. Confirm that the connections between the tank and collector are correct and leak-free.

9. Make sure no object (tree, building, etc.) is shading the collector or part of it.

Also check:

10. Is your hot water consumption greater than the system’s capacity?

11. Is high hot water consumption occurring at night?

12. Are weather conditions unsuitable for solar heating?

B. If the Solar Water Heater Does Not Provide Hot Water via the Electric Element

1. Turn off the power and remove the cover of the heating element.

2. Check the thermal safety switch on the thermostat — it should be pressed inward.

3. Inspect the wiring between the thermostat and heating element.

4. Ensure the thermostat is set to a sufficiently high temperature.

5. Check the heating element itself.

6. Check the main power supply.

7. Turn the power back on and ensure that voltage is present at the heating element terminals.

⚠️ Electrical checks and connections should only be carried out by a licensed electrician.

Notes

• The magnesium anode rod should only be replaced by an authorized technician.
  Replacement intervals depend on water quality:

  • For TDS up to 600 ppm → replace every 24 months

  • For TDS above 600 ppm → replace every 18 months

  • For TDS above 1000 ppm → replace every 12 months

• In areas with TDS above 600 ppm, a water filter is essential.

• The specifications of products and their components (e.g., heating elements, thermostats, valves, etc.) conform to Greek standards.
  It is your responsibility to ensure these specifications comply with local plumbing, electrical, hygiene, building, and other regulations in your country.

• HELIOFAN is not liable for any third-party damages, whether due to incorrect installation of products and/or components or failure to comply with applicable regulations.
  In the case of defective products, the terms of the warranty apply.

Thank you for choosing our products. We assure you that you have made the right decision.
If you need any clarifications or further information, please contact us.