en
58
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
Collector limit temperature
Collector emergency shutdown
EM / EM1 / EM2
Collector limit temperature
Adjustment range: 80 … 200 °C [170 … 390 °F]
Factory setting: 130 °C [270 °F]
When the collector temperature exceeds the adjusted collector limit temperature,
the solar pump (R1 / R2) 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
will change to 80 ... 120 °C [170 ... 250 °F]. The factory setting in that case
is 95 °C [200 °F].
WARNING!
Risk of injury! Risk of system damage by pressure surge!
If water is used as the heat transfer fluid in pressureless systems,
water will boil at 100 °C [212 °F].
Î
In pressureless systems with water as the heat trans-
fer fluid, do not set the collector limit temperature
higher than 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 notes are valid for all three
cooling functions:
Note
The cooling functions will not become active as long as solar loading is
possible.
Note
In 2-store-systems, the cooling functions will only affect store 1, or the
base area of the store respectively.
Collector cooling
OCC / OCC1 / OCC2
Collector cooling option
Adjustment range: OFF / ON
Factory setting: OFF
CMX / CMX1 / CMX2
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 tempera-
ture 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.
Note
In system 10, the parameter CMX is available without the OCC function.
In system 10, CMX is used for setting the activation temperature for the
heat dump function. No other switch-on condition is needed in that case.
