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AMK Solac 11252 DeltaSol_BX.monen.ind
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Level 5
The system cooling function aims to keep the solar system
operational for a longer time. The function overrides the
maximum store temperature to provide thermal relief of
the collector fi eld and the heat transfer fl uid on hot days.
If the store temperature is higher than the adjusted maxi-
mum store temperature and the switch-on temperature
difference
DTCO
is reached, the solar system remains
activated or is switched on. Solar loading is continued until
either the temperature difference falls below the adjusted
value
DTCF
or the collector emergency shutdown tem-
perature
CEM
is reached.
If the system cooling function is active, is shown on the
display (fl ashing).
System cooling
CooL / OSYC
System cooling option
Adjustment range: ON / OFF
Factory setting: OFF
COOL / DTCO
Switch-on temperature diff.
Adjustment range: 1.0 ... 30.0 K
Factory setting: 20.0 K
COOl / DTCF
Switch-off temperature diff.
Adjustment range: 0.5 ... 29.5 K
Factory setting: 15.0 K
Note:
This function will only be available if the collec-
tor cooling function, the heat dump function, and
the drainback option are deactivated.
Store cooling
When the store cooling function is activated, the controller
aims to cool down the store during the night in order to
prepare it for solar loading on the following day.
If the adjusted maximum store temperature (
S MAX /
S1MAX / S2MAX
) is exceeded and the collector tempe-
rature falls below the store temperature, the system will be
reactivated in order to cool down the store.
Reference temperature differences are
DT O
and
DT F
.
COOl / OSTC
Option store cooling
Adjustment range: ON / OFF
Factory setting: OFF
Note:
If the temperature at the store sensor reaches
95°C, all cooling functions will be blocked. The
switch-on hysteresis is -2K.
Cooling functions
Different cooling functions can be activated: system cooling,
store cooling and heat dump.
COOl / OTCL
Overtemperature collector
Adjustment range: 70 ... 160 °C
Factory setting
: 110 °C
Heat dump
COOL / OHDP
Heat dump function
Selection
: ON / OFF
Factory settin
g
: OFF
If the heat dump function
OHDP
is activated, the selected
relay is energised with 100%, if the collector temperature
reaches the adjusted collector overtemperature
OTCL
.
If the collector temperature falls by 5 K below the adju-
sted collector overtemperature
OTCL
, the relay will be
switched off.
A selection can be made between pump logic and valve logic
(
OTPUM ON
= pump logic,
OTPUM OFF
= valve logic).
If pump logic is selected, the relay for solar loading switches
off and the relay for heat dump remains switched on.
The relay for the heat dump function can be selected in the
HDREL
channel.
Note:
The adjustable value
OTCL
is locked against
the collector emergency temperature
CEM
by 10 K. The heat dump will only be available
if the collector cooling function, the system
cooling function, and the drainback option are
deactivated.
COOL / OTPUM
Pump or valve logic
Selection
: ON / OFF
Factory setting:
OFF
COOL / HDREL
Relay heat dump function
Selection
: system dependent
Factory setting: 3