69
ELECTRONIC CONTROL UNIT
Chapter 9
Collector temperature limit
Collector safety disconnection
SIC:
Collector temperature limit
Setting area: 110..0.200 °C
Factory setting: 140 °C
When the collector set limit temperature is
exceeded (
SIC
), the solar pump (R1) disconnects so
as to prevent dangerous overheating of the solar
components (collector safety disconnection). The
factory setting of the temperature is 140°C but this
can be modifi ed in the range of 110...200°C. When
the collector temperature limit is exceeded, the
display shows the
symbol (fl ashing).
System cooling
OCR:
Opt. system cooling
Setting area: OFF...ON
Factory setting: OFF
The solar system is disconnected when the
tank maximum temperature set is reached.
If the temperature of the collector increases
until reaching the collector set maximum
temperature (CMS), the solar pump is
inserted until the temperature is lower than
this limit value. In the meantime, the tank
temperature can continue to increase (tank
maximum temperature activated lastly) but
only to 95°C (tank safety disconnection).
If the temperature of the tank exceeds the
maximum set (SMS) and the temperature
of the collector is lower by a minimum of
5K to that of the tank, the solar plant will
remain inserted until the tank has cooled
again (-2K) by means of the collector and
the pipes and has a temperature lower than
the maximum set (SMS). When the system
cooling device is inserted the display shows
the
symbol (fl ashing). By the mans of this
device, the solar system functions for a long
time even on hot summer days and keeps a
heat equilibrium in the fi eld of the collector
and the heat source.
CMS:
Collector max. temp.
Setting area: 100..0.190 °C
Factory setting: 120 °C
