For the property owner
24
CTC EcoZenith
I
550
Solar Operation Control
When solar energy is activated, the transfer to the buffer tank(s) is done in two ways:
no heating needed and heating needed on the system.
When there is no heating need on the heating system, the sun charges the CTC
EcoZenith
I
550 in order to get a high temperature and a maximum of hot water.
The CTC EcoZenith
I
550 will then have to charge until the sensor of the lower tank
reaches the factory-set 80°C before the circulating pump starts and transfers hot water
from the CTC EcoZenith
I
550’s upper connection in the lower tank into the top of the
first buffer tank. Heat is then transferred until the sensor in the lower tank has fallen
3 degrees (transfer starts at 80 degrees and stops at 77 degrees). The lower tank must
be at least 7 degrees warmer than the buffer tank for the charging to be allowed to start.
This applies independently of heating need or not.
When there is a heating need in the system, the transfer will be controlled by the reference
value in the lower tank, which in turn is controlled by the selected curve inclination
for the heating system. When the sun has heated the lower tank to 7 degrees above the
reference value, the transfer starts, provided that the lower tank is also 7 degrees warmer
than the buffer tank. The lower the temperature the sun works towards, the smaller the
losses in the solar panels; the efficiency thereby increases. When a heating need is present,
a maximum high temperature is thus not needed; instead the system strives for a maximum
energy draw from the solar panels. The above-mentioned temperature levels can
be adjusted.
