Nobel 1000lt, Installation, Maintenance & Use Instructions

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GENERAL INFORMATION
In the present manual you will find all necessary instructions with regard to the installation, operation and
maintenance of the product.
The company is active in the Solar Energy Field with high-tech equipment, ultra-modern facilities and certified
products of high quality. Our experience and know-how support our cooperations, before and after sales, both in
Europe and internationally.
Nowadays, the necessity for production and saving of energy without at the same time polluting the environment has
become common knowledge. The planetʼs conventional energy resources are diminishing to a threatening level as
our societyʼs energy requirements are increasing, generating pollutants that affect the climateʼs balance. Renewable
energy sources promise a solution to the energy problem as well as to pollution. Gradually, the international legislation
is changing and encouraging - or even imposing - the use of alternative energy products, with the aim to satisfy
energy requirements without endangering the environment.
DOMESTIC HOT WATER CONSUMPTION
Statistically, it is estimated that the mean family consumption is 35 to 50 liters daily per person. If we add the
consumption of a washing machine and a dishwasher, when these are connected to the solar water storage tank, then
each requires 20 liters per day (per wash). Thus, a family of four, for example, with a mean hot water consumption
of 40 liters per person, needs an 160 liters solar water heater. If household appliances connected to the solar water
heater are added, then the demand increases by at least 40 liters daily. In order to take full advantage of the solar
water heater, maximum use of hot water should be made during daytime, so that the system can continuously
produce hot water during the daylight hours, maintaining thus its maximum efficiency.
SOLAR WATER HEATING
The collecting surface absorbs solar energy and heats the liquid (water or antifreeze mixture) that circulates in the
water element. This liquid is directed to the water storage tank where it heats the water. The factors that affect the
temperature of the water supplied by a solar system are many and their values vary according to the season, the time
of day and the location. Keeping in mind that the solar system is a system that is exposed to the weather conditions,
basic parameters affecting its performance are the mains water temperature, the available solar energy and the
ambient temperature. The mains water does not have a constant temperature throughout the year, being much colder
in winter compared to summer. Considering 45°C as a satisfactory temperature for the domestic hot water (in order
to fulfill the needs of a home) and based on statistic values, in winter the temperature of the mains water has to be
increased by approximately 35°C, whereas during the summer the increase is 20°C.
Similarly, the available solar energy does not remain the same throughout the year, being much less in the winter
months than in the summer months. During periods of reduced sunlight and low ambient temperatures, the solar
water storage tank assures the preheating of the water and is assisted by an electrical heating element or the
central heating water storage tank (triple action solar water storage tanks). As far as night-time temperature losses
are concerned, these are limited as much as possible by the solar system’s powerful thermal insulation. They are
nevertheless affected by ambient temperatures, which vary depending on the location and the weather.