Sonnenkraft SKSC2 Manual Del Usuario página 50

Oscillating break time / oscillating charge
time / collector rising temperature:
4.1.19 Recooling function
OREC:
Option recooling
Adjustment range:
OFF ... ON
Factory setting: OFF
4.1.20 Tube collector special function
O TC:
Tube collector special
function
Adjustment range:
OFF ... ON
Factory setting: OFF
22
Adjustment channels
The controller checks the stores regarding
loading facilities (switch-on difference). If the
priority store cannot be loaded, the lower-
ranking store is checked. If the lower-ranking
store can be charged, this is effected by the so-
called „oscillating charge time" (tRUN). After the
expiration of the oscillating charge time, loading
is stopped. The controller controls the increase
of the collector temperature. If this temperature
increases by the rise temperature of the collector
(∆T-Col 2 K, fi xed software value), the expired
break time is again reset to zero and the
oscillating break time (tSP) starts over again. If
thereafter the switch-on conditions of the priority
store are not reached, the loading of the lower-
ranking store will be continued. If the priority
switch has reached its maximum temperature,
the oscillating charge is not carried out.
If, as a result of of the system cooling OCX,
the store temperature is higher than the store
maximum temperature (S MX / S1MX) and the
collector 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
compared 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 measured temperature (new reference
value) is again exceeded by 2 K, the solar pump
switches-on for 30 seconds.
Should the switch-on difference between collector
and store be exceeded during the runtime of the
solar pump or the standstill of the system, the
controller automatically switches over to solar
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
(possibly fl at 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 collector tubes).