Description Of Functions; Solar Function; Calculation Of The Quantity Of Thermal Energy (Solar); Minimum And Maximum Collector Temperature - Wpm Econ Sol Montage- Und Gebrauchsanweisung

6

Description of functions

6.1 Solar function

The controller constantly compares the temperatures at the col-
lector (R23) and in the lower section of the cylinder (R22). As
soon as the collector is heated by the sun and the configured
switch-on temperature (e.g. 8 K) is reached between the collec-
tor and the cylinder, the pump (M23) is switched on. The pump
draws the heat transfer medium from the lower, cooler section of

6.2 Calculation of the quantity of thermal energy (solar)

The quantity of thermal energy transferred to the cylinder is cal-
culated from the measured temperature difference and the flow
that is set on the heat pump manager. The collector sensor acts
as a reference sensor for the hot flow, and the lower cylinder sen-
sor as a reference sensor for the cool return. The glycol type of
the heat transfer medium and its concentration (as a percentage)

6.3 Minimum and maximum collector temperature

The solar pump switches off automatically if the minimum collec-
tor temperature is undershot. The minimum collector tempera-
ture is 5 °C. The solar function is only re-activated when the
switch-on hysteresis of 5K is exceeded.
When the maximum collector temperature of 120 °C is ex-
ceeded, an emergency switch-off takes place: The solar pump is

6.4 Collector cooling function

The collector cooling function delays the evaporation of the heat
transfer medium. The solar pump is started up shortly before the
maximum collector temperature is reached so that the heat
transfer medium is cooled through heat loss in the pipes and the

6.5 Cylinder charging

The solar pump is switched off when the maximum cylinder tem-
perature is reached. Cylinder charging is only re-activated when
the switch-on hysteresis of 5K is undershot.

6.6 Pump kick function

This function is used in collector fields in which the collector sen-
sor is in the shade. To be able to measure the temperature of the
collectors - which may be fully exposed to the sun's rays - when
the collector temperature sensor is in the shade, the heat transfer
medium is pumped to the sensor. This allows a temperature to
be measured which, in practice, has priority over the temperature
sensor. The pump kick function is only active during the day. The
solar pump is switched on for a short period, during which the
controller monitors the temperature rise on the strap-on sensor.
If this temperature rise is sufficient, the solar pump remains ac-
tive until the switch-on conditions for the solar function are ful-
filled or until a temperature rise is no longer detected.
the cylinder and pumps it to the collector. The heat transfer me-
dium is heated by solar radiation in the collector and flows back
to the cylinder. In the cylinder, the heat transfer medium heats
the domestic hot water via a heat exchanger (siehe Kap. 7.2 auf
S. 6).
must be paramerterised in the heat pump manager in order for a
correct calculation to be made.
The daily output is calculated from these figures and is then dis-
played. The total output is calculated by totalling the daily out-
puts; this figure is also displayed.
switched off. Since the heat can no longer be transported away
from the controller, a controlled evaporation of the heat transfer
medium takes place in the collector (stagnation). The solar func-
tion can only be re-activated when the collector temperature has
dropped below 105 °C.
cylinder. The collector cooling function remains active until the
collector has reached its maximum temperature (see above).
The maximum cylinder temperature is raised by 5K.
In order to prevent material damage, the cylinder temperature is
set to a limit of 85 °C in the factory. In areas with very hard water,
it may be advisable to limit the maximum cylinder temeperature
to 60 °C.
6.6
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