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Store emergency shutdown
OSEM
Store emergency shutdown option
Adjustment range: OFF / ON
Factory setting: OFF
This option is used for activating the internal store emergency shutdown for an
upper store sensor. If the temperature at the reference sensor exceeds 95 °C
[200 °F], the store will be blocked and loading will be stopped until the tempera-
ture falls below 90 °C [190 °F].
Note:
S3 is used as the reference sensor.
Collector limit temperature
Collector emergency shutdown
EM
Collector limit temperature
Adjustment range: 80 … 200 °C [170 … 390 °F]
Factory setting: 110 °C [230 °F]
When the collector temperature exceeds the adjusted collector limit temperature,
the solar pump (R1) switches off in order to protect the system components
against overheating (collector emergency shutdown). If the collector limit temper-
ature is exceeded,
⚠
is displayed.
Note:
If the drainback option
ODB
is activated, the adjustment range of
EM
is
changed to 80 … 120 °C [170 … 250 °F]. The factory setting in that case
is 95 °C [200 °F].
Cooling functions
In the following the 3 cooling functions – collector cooling, system cooling and
store cooling – are described in detail. The following note is valid for all 3 cooling
functions:
Note:
The cooling functions will not become active as long as solar loading is
possible.
Collector cooling
OCC
Collector cooling option
Adjustment range: OFF / ON
Factory setting: OFF
CMX
Collector maximum temperature
Adjustment range: 70 … 160 °C [150 … 320 °F]
Factory setting: 110 °C [230 °F]
The collector cooling function keeps the collector temperature within the operat-
ing range by heating the store. If the store temperature reaches 95 °C [200 °F] the
function will switch off for safety reasons.
If the store temperature exceeds the adjusted maximum store temperature, the
solar system is switched off. If the collector temperature increases to the adjusted
maximum collector temperature, the solar pump is activated until the collector
temperature falls below the maximum collector temperature. The store temper-
ature may then exceed the maximum store temperature, but only up to 95 °C
[200 °F] (emergency shutdown of the store).
If the collector cooling function is active,
⓵
and
☼
are displayed (flashing).
Note:
This function will only be available if the system cooling function (
OSYC
)
is deactivated.
