FUNCTION DESCRIPTION
smart Econ - emz-HCW - 180116
101
Function description
Solar operation
The solar pump is switched on when the collector temperature is higher than the storage tank tem-
perature by the adjustable switch-on temperature difference and when the collector temperature has
reached the minimum temperature.
The solar pump is switched off when the maximum temperature or minimum temperature of the col-
lector is reached or when the collector temperature plus half the switch-on temperature difference is
lower than the storage tank temperature, or when the maximum temperature of the storage tank is
reached.
During solar storage tank charging, the speed of the pump is controlled via the PWM signal in order
to achieve the maximum possible solar yield.In differential value control, a specified temperature dif-
ference between the collector sensor and the storage tank sensor must be maintained.
In order to guarantee a minimum flow rate in the solar system, a minimum speed is specified for the
solar pump.
Collector cooling
As a rule, the solar system switches off when the set maximum storage tank temperature is
reached.However, if the collector temperature rises to the set maximum collector temperature, the
solar pump runs at its start speed until the temperature falls below this limit again.The storage tank
temperature can increase further up to the storage tank safety temperature (90°C).
Storage recooling
If the storage tank temperature is above the maximum storage tank temperature and the current col-
lector temperature is at least 5 K below the storage tank temperature due to the collector cooling,
the solar pump runs at its start speed until the storage tank has cooled down to the set maximum
storage tank temperature via the collector and the pipes.
Limit temperature
If the collector temperature exceeds the maximum collector temperature, the solar system is deacti-
vated until the maximum collector temperature is again below by 5K.
Solar pump anti-lock circuit (ABS)
During the low yield season, usually September to May, the anti-lock circuit for the solar pump is
released.This happens once a week within a short time window of 1 minute (factory setting).This
time can be changed by the installer or the ABS function can be completely deactivated.
Buffer management function
In systems with a central buffer system, individual heat generators are released/locked via a special
buffer management system, which gives preference to heat generators that use renewable ener-
gies.The intelligent buffer management monitors the temperature development in the buffer system
and the stand-by state of the heat generators.Only if the heat generator(s) using regenerative ener-
NOTE
The functions listed below are not implemented in all systems.
