CTC Union EcoZenith i555 Pro 1x230V, Installation And Maintenance Manual

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18 CTC EcoZenith i555 Pro
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2.6 Solar Energy
The EcoZenith contains a 10 m long 18 mm fi nned and internally grooved
solar coil which manages approx. 10 m² of solar panel. On larger solar panel
installations, the solar energy is connected via an external heat exchanger
(see fi gure 2). The heat exchanger is connected to the upper and lower
connections on the lower part of CTC EcoZenith (either side is possible). If
a greater number of panels is connected, one or more buffer tanks can also
be installed in the system. More information on function and control of buffer
tanks can be found in the "Extra Buffer Tank" section.
If the solar panels produce a temperature which is more than 7 degrees
(factory-set) higher that the sensor (B33), the charge pump starts and
transfers the solar energy to the lower tank. The speed-controlled PWM
pump controls the fl ow so that it always delivers a temperature which is
7°C higher. This means that if solar panel output rises, the charge pump will
increase the fl ow, and if solar panel output decreases, the charge pump will
reduce the fl ow. When the temperature in the lower tank increases or the
solar panel loses temperature, and the difference between the temperature in
the solar panel and the lower tank is below 3 degrees (adjustable), charging
stops. Charging will not restart until the solar panel is again 7 degrees
warmer than the lower tank.
When the temperature in the lower tank rises and becomes warmer than
the upper tank, by the laws of physics, heat will rise into the heat distribution
pipe and layer itself into the right temperature level in the upper tank
through perforated holes in the distribution pipes. The colder temperature
in the upper tank will, in the same way, sink down and distribute itself in
its temperature zone in the lower tank through the distribution pipe which
descends into the lower tank. Based on the factory setting, the sun will heat
the lower tank in the EcoZenith to 85 °C before the charging is stopped.
Also refer to the "Solar panels" section in the "Detailed Menu
Descriptions" chapter (Installer/Settings/Solar Panels).
Schematic diagram only the installer adds expansion vessels, safety valves, etc., and sizes the system.