Energy collected from the sun is the cleanest and most sustainable source of energy we know. Its use relieves us from the consumption of exhaustible fossil fuels and does not pollute while reducing considerably the emission of carbon dioxide.
The solar collector consists of open vacuum tubes which absorb the solar energy from the sun rays, converting it into heat energy. When in contact with the cold water the energy produced heats up the water inside the vacuum tubes.
As the water inside the tubes heats up, its density decreases and the hot water rises into the hot water storage tank. Due to its greater density, the cold water in the tank will flow down into the tube.
The whole process is repeated and the hot water will circulate continuously until its temperature inside the hot water tank reaches that of the water inside the vacuum tube.
This natural phenomenon is known as thermosiphon process
Copper coil is installed inside the tank as the heat exchanger. When cold water flows into the heat exchanger, it absorbs heat from the hot water in the tank via the copper coil. Cold water under pressure enters the heat exchanger through the cold-water inlet and hot water comes out through the hot-water outlet (diagram 2).
The unit is filled with cold water through an assistant tank to top up water loss through evaporation.
Thermostatic Valve –Giacomini – Model R156-1
The thermostatic mixing valve is installed in order to achieve energy saving, greater comfort of use of hot water and elimination of the risk of burns caused by excessive operating temperatures.
It is very important to install the mixing valve on the outlet of the solar water heater, where the temperature of the storage tanks, especially in summer, could reach well above the temperatures to ordinary use.
Water Pump for Pressure Type Solar Water Heater
Pedrollo water pumps offer the most convenient and reliable method of delivering water from your Solar Water Heater. Contact us for a proposal.
Duraco Solar Water Heater
The warranty is applicable to your DURACO solar hot water system (hereafter called the solar
system) and is as follows:
• Tubes and Heat Pipes: 180 months from the date of installation – Free replacement of failed tubes and heat pipes (Transport and Labour will be charged to owner)
• Manifold and frame: 180 months from date of installation – Free replacement of defective manifold and frame (Transport and Labour will be charged to owner)
• Solar Water Tank: 96 months from date of installation – (Transport and Labour will be charged to owner)
• Electric booster: 36 months from date of installation – (Transport and Labour will be charged to owner)
• Assistant tank & Float Valve: 12 months from date of installation (Transport & Labour will be charged to owner)
The company’s obligation under this warranty is limited to repair or replacement of any part, or parts, of the solar system, at the option of the company
This warranty does not cover misuse, accident or failure from faulty installation, harsh or adverse water conditions or from attempts to repair the system by other than DURACO
accredited technician or service agent.
The warranty only applies to the solar system and does not cover any plumbing or electrical parts such as pressure and temperature relief valves, air valve, float valve, stop cocks, non return valve, electrical switches, pumps, fuses and others.
Where the non-pressure solar system has been connected directly to a pressure supply (such as the water authority main pressure line, pressure pump etc..) and not to an open circuit header tank as is the correct installation procedure.
Accidental damage, acts of God (cyclonic weather), failure due to misuse incorrect installation, attempts to repair the system by other than DURACO accredited technician or service agent
Where it is found that the system does not suffer any defect, where there is no flow of hot water due to a faulty plumbing installation and not of the system or components, where there is a failure of water supplies
Subject to any statutory provisions to contrary claims for damage to furniture, carpets, walls, foundation, or any other consequential loss either directly or indirectly due to leakage from the system
Where the solar system has been installed and / or operated without the solar system being filled with water
Where the damage has been caused by an inflow of cold water into the system through the hot water pipe
Where the unit has been moved without the company’s prior approval
No warranty on the vacuum tubes (except manufacturing defect)
VERY IMPORTANT – When using electric booster
For safety precaution, make sure that electric booster is switched off before using hot water
All water connections from main supply to the cold-water inlet and from the hot water outlet
to the hot water distribution lines MUST BE MADE WITHIN ONE WEEK OF INSTALLATION
Book an appointment
Please note that once we receive your request, someone of our team will revert to confirm it for you. If you have any urgent request, please call us on +230 249 3300.