SHR
521 20
© Dra
yton
06
334
SHR 521
20.monen.
ind
d
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14
CMN
:
Minimum collector tempera-
ture adjustment range
-10 ... 90 °C
Factory setting 10 °C
CMX:
Maximum collector temp.
Adjustment range
100 ... 190 °C
Factory setting120 °C
4.1.10 System cooling
If the selected maximum store temperature is reached, the
solar system switches off. If then the collector temperatu-
re rises to the selected maximum collector temperature
(
CMX
), the solar pump remains activated until the collector
temperature falls below the temperature limit value. The
store temperature might continue to rise (up to the maxi-
mum store temperature), but only until 95 °C (emergency
shutdown of the store). If the store temperature is higher
than the maximum store temperature (
S MX
) and the col-
lector temperature is lower by at least 5 K than the store
temperature, the solar system remains activated until the
store is again cooled down by the collector and the pipes
to the selected maximum temperature (
S MX
).
In case of active system cooling is shown on the display
(flashing). Thanks to the cooling function the solar system
can be kept running for longer periods on hot summer days
and cooling of the collector and the heat transfer medium
is ensured as well.
OCX
:
Option system cooling
Adjustment OFF ... ON
Factory setting OFF
4.1.11 Option minimum collector limit
OCN:
Minimum collector limit
Adjustment range OFF / ON
Factory setting OFF
The minimum collector temperature is a minimum switching
temperature, which must be exceeded to allow the solar
pump (R1/R2) to switch on. The minimum temperature
will prevent overswitching of the solar pump (or solid fuel
boiler charging pumps) at low collector temperatures. If the
minimum temperature is underrun,
(flashing) is shown
on the display.
CFR
:
Antifreeze temperature
Adjustment range
-10 ... 10 °C
Factory setting 4,0 °C
4.1.12 Option antifreeze function
OCF:
Antifreeze function
Adjustment range
OFF / ON
Factory setting OFF
The antifreeze function activates the loading circuit between
collector and store if the selected antifreeze function is
underrun in order to protect the medium from freezing or
thickening. If the selected antifreeze temperature is excee-
ded by 1 °C, the loading circuit will be deactivated.
Please note:
As there is only a limited heat quantity of the store available
for this function, the antifreeze function should only be
used in regions with few days of temperatures around the
freezing point.
4.1.9 Collector temperature limit
Collector emergency shutdown
If the selected collector limit temperature (
EM
) is exceeded,
the solar pump (R1/R2) is deactivated to avoid overheating
of the solar components (collector emergency shutdown).
The limit temperature is set to 140 °C but it can be changed
within the adjustment range of 110 ... 200 °C. In the display
(flashing) is shown.
EM
:
Collector temperature limit
Adjustment range
110 ... 200 °C,
Factory setting 140 °C
