Ferroli ECOTRONIC Plus Manual page 75

ECOTRONIC Plus
Cooling function (1-store systems)
Solar/Options/cool func.
selection: "Yes", "No"
factory setting: "No"
Function (switching conditions):
Collector cooling function:
Solar/Options/col. cooling
selection: "Yes", "No"
factory setting: "No"
if you select "Yes":
Solar/adj. values/Tcolmax
adjustment range: 80 ... 160 °C
factory setting: 110 °C
hysteresis 5 K
2 separated collector circuits (2 pumps):
shared collector circuit (1 pump):
:
The cooling function can be used in 1-store systems (basic
systems 1 and 2). If the store temperature exceeds its maxi-
mum limitation (Tstmax), the surplus energy in the collector
can be diverted. The minimum pump speed is set to 100%.
If Tstmax is exceeded, and the switch-on temperature dif-
ference DTon between collector and store are reached, the
solar circuit (primary) and the cooling relay are operated. If
the store temperature falls to less than Tstmax, the cooling
relay switches off.
If the switch-off temperature difference DToff is underrun
during this period, the solar circuit and the cooling relay
are switched-off.
2-collector system: In this system, only the collector circuit which fulfills the
switch-on conditions described above, is operated.
(basic system 2)
The collector cooling function starts, when the adjusted ma-
ximum collector temperature is reached. If this temperature
is underrun by 5 K, this function is switched off.
The collector is cooled via heat transfer to the next free
store (a store which is not blocked). The numerically last
store is not used (swimming pool protection or in the case
of multi-store systems). Note this may overide Tstmax so
additional scald protection may be needed.
The pump output (provided that it is activated) is controlled
with maximum relative pump speed.
Note:
It is not possible to adjust a temperture value for the ma-
ximum collector temperature (Tcolmax) which is higher
than the collector safetey shutdown temperature. There
must be a difference between these two temperatures of
at least 10 K.
2-collector systems:
The collector circuit which needs to be cooled is operated.
If one store is being loaded by another collector, this loading
is continued.
"Pump speed" depends on collector coolingwhich takes
priority.
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