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Collector emergency shutdown
When the collector temperature exceeds the adjusted collector limit tempera-
ture, the solar pump (R1 / R2) switches off in order to protect the system compo-
nents against overheating (collector emergency shutdown). If the collector limit
temperature is exceeded, ⚠ is displayed (ashing).
Note:
If the drainback option is activated, the adjustment range of the collector
emergency temperature is changed to 80 … 95 °C. Factory setting will
be 95 °C.
Note:
In systems with east- / west collectors 2 separate menus (COL and
COL 2) will be displayed.
WARNING!
Risk of injury! Risk of system damage by pressure surge!
If water is used as the heat transfer uid in pressureless systems,
water will boil at 100 °C.
Î In pressureless systems with water as the heat trans-
fer uid, do not set the collector limit temperature
higher than 95 °C.
Collector cooling
The collector cooling function keeps the collector temperature within the operat-
ing range by heating the store. If the store temperature reaches 95 °C 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 tempera-
ture may then exceed the maximum temperature, but only up to 95 °C (emergency
shutdown of the store).
If the collector cooling is active, ☼ is displayed (ashing).
Note:
This function is only available if the system cooling function and the heat
dump function are not activated.
Note:
In systems with east- / west collectors 2 separate menus (COL and
COL 2) will be displayed.
CMAX (1,2)
Collector maximum temperature
Adjustment range: 70 … 160 °C
Factory setting: 110 °C
Switch-on hysteresis: -5K
OCCO (1.2)
Collector cooling option
Selection: OFF / ON
Factory setting: OFF
COL (1,2) 4/5
PUSH
CEM (1.2)
Collector limit temperature
Adjustment range: 80 … 200 °C
Factory setting: 130 °C
Switch-on hysteresis: -10 K
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