Product specifications

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latter case, a collector at a high temperature loses energy towards the surrounding
environment from all sides, especially through the transparent front cover (glass).
Therefore, the main principle for efficient operation of a domestic hot water system
is for the water in the storage tank to be at a low temperature in the morning, when
solar radiation begins to increase.
Thus, if there is a need to use the auxiliary electric heater during the night, in
households with a nightly (off-peak) electricity rate, it is recommended to use the
hot water by the morning of the next day. This way the solar collector will be able
to start operating at a low temperature and therefore efficiently.
Another piece of advice is to use hot water during the day and not collectively at
night or the following morning. In this case, increased efficiency rates have been
measured in the order of 20%-25%.
1.9 Use of the back-up heating system (electric heater)
The SUN&HEAT solar water heater is equipped with an electric heater as a
supplementary source of energy for the winter when the available solar radiation
is rather low, or in case of insufficient or no sunlight or very high demand for hot
water.
CAUTION
Repair work on the electrical parts of the solar water heater should only be
done by a licensed electrician.
CAUTION
Do not use the electrical heater of your solar system to heat water in the case
that there is an interruption of the water supply from the city network.
CAUTION
Do not use the electrical heater of your solar system to heat water in the
case of freezing weather conditions or very low temperatures. Under these
conditions, the water in the hot and cold water pipes (between the solar water
heater and the house) may have frozen, interrupting the flow of hot water
from the solar system to hot water taps in the house.
With frozen cold and hot water pipes, there is danger of destroying your storage
tank, because of the expansion of the water in the tank, due to the heating and