Sonnenkraft SKSC2HE Manual Del Usuario página 55

4.1.22. Recooling function
OREC:
Option recooling
Adjustment range:
OFF ... ON
Factory setting: OFF
4.1.23. Tube collector special function
O TC:
Tube collector special
function
Adjustment range:
OFF ... ON
Factory setting: OFF
4.1.24. Afterheating (Arr = 3)
AH O:
Thermostat-switch-on
tem perature
Adjustment range:
0.0 ... 95.0 °C
Factory setting: 40.0 °C
AH F:
Thermostat-switch-off
tem pe rature
Adjustment range:
0.0 ... 95.0 °C
Factory setting: 45.0 °C
If, as a result of of the system cooling OCX, the
store temperature is higher than the store max-
imum temperature (S MX / S1MX) and the col-
lector temperature is at least lower than 5 K, the
solar system continues running until the store
is cooled down to the adjusted store maximum
temperature (S MX / S1MX) via collector and
pipes. In multi storage systems the recooling is
generally effected at store 1.
If the controller measures an increase of 2 K com-
pared to the collector temperature stored at last,
the solar pump is switched-on to 100 % for about
30 seconds to detect the present temperature
of the medium. After the expiration of the solar
pump runtime the current collector temperature
is stored as a new reference value. If the meas-
ured temperature (new reference value) is again
exceeded by 2 K, the solar pump switches-on for
30 seconds.
Should the switch-on difference between collec-
tor and store be exceeded during the runtime of
the solar pump or the standstill of the system,
the controller automatically switches over to so-
lar charging.
If the collector temperature falls by 2 K during
the standstill, the switch-on value for the special
tube collector function will be recalculated and
the solar pump won't be switched-on.
Application area: Vacuum tube collectors (pos-
sibly flat plate collectors as well) in order to avoid
switch-on delays during a store load, as well as
to avoid a run of the solar pump during the night
(the temperatures measured during the day can
be „stored" until night by the vacuum in the col-
lector tubes).
The modulating afterheating can be effected ei-
ther modulating or through a thermostat function.
Modulating afterheating (MOD = On):
Afterheating consists of a boiler demand and a
loading pump.
Modulating boiler demand takes place via a
0-10 V signal, provided that the external heat
generator is equipped with a modulation input.
If this is not the case, the boiler has to be con-
trolled by an external control. The parameters
TMIN and TMAX define the curve used for de-
termining the 0-10 V signal depending on the
boiler set value.
GB
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