SHR
521 20
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SHR 521
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4.1.14 Tube collector special function
If the controller measures an increase of 2 K compared
to the latest recorded collector temperature, the solar
pump is switched on to 100 % for about 30 seconds. After
this period the current collector temperature is stored as
new reference value. If the measured temperature (new
reference value) is again exceeded by 2 K, the solar pump
again switches-on for 30 seconds. If the switch-on difference
between collector and store is again exceeded during
runtime of the solar pump or the stopping of the system, the
controller automatically switches over to solar charging.
If the collector temperature drops by 2 K during this
stoppage, the switch-on value for the special tube collector
function will be recalculated.
O TC:
Tube collector special
function
Adjustment range:
OFF ... ON
Factory setting: OFF
4.1.13 Recooling function
If the selected maximum store temperature (
S MX
)
is reached, the solar pump remains activated to avoid
overheating the collector. The store temperature might
continue to increase but only up to 95 °C (emergency
shutdown of the store).
In the evening the solar system continues running until
the store is cooled down to the selected maximum store
temperature via collector and pipes.
OREC:
option recooling
adjustment range
OFF ... ON
Factory setting: OFF
The thermostat function works independently from the
solar operation and can be used for use of surplus energy
back-up heating.
•
AH O
<
AH F
the thermostat function is used for back-up heating
•
AH O
>
AH F
the thermostat function is used for use of surplus
energy
is shown on the display if the second relay output is
activated.
4.1.15 Thermostat function
(Arr = 2)
back-up heating
use of surplus energy
AH O:
Thermostat switch-on
temperature
Adjustment range:
0,0 ... 95,0 °C
Factory setting: 40,0 °C
AH F:
Thermostat switch-off
temperature
Adjustment range:
0,0 ... 95,0 °C
Factory setting: 45,0 °C
