3881 F Antifreeze Concentration; 3884 F Pump Capacity; None ¦ Kwh ¦ Liter; 3888 F Pulse Value Yield Numer - Siemens Albatros2 RVA78.690 User Manual

Speed P-band Xp and
integral action time Tn
Antifreeze
Temperature differential
measurement
Pump capacity
Pulse measurement
Siemens
Building Technologies
The charging setpoint of the storage tank with first-priority charging and the
collector temperature are used for speed control. A PI controller calculates the
speed required to ensure that the collector temperature is 2 K below the switch-on
temperature.
If the collector temperature rises due to increased solar radiation, the speed is
increased. If the collector temperature drops below this setpoint, the speed is
reduced.
Limit parameters can be set to define a maximum and minimum pump speed
(operating lines 3870 and 3871).
The PI controller can be influenced by parameters Xp and Tn. The controller has a
dead band of +/- 1 K.
If the charging priority is changed, the controller regulates the speed in accordance
with the new charging setpoint.
6.6.8 Yield measurement
Line no. Operating line
3880 Antifreeze
3881 Antifreeze concentration
3884 Pump capacity
3887 Pulse unit yield
None
kWh
Liters
3888 Pulse value yield numer
3889 Pulse value yield denom
The 24-hour and total solar energy yield (8526 and 8527) is calculated, based on
these data.
Since the mixing ratio of the collector medium has an impact on heat transmission,
the type of antifreeze used and its concentration must be entered in order to be
able to determine the energy yield.
Two additional sensors can be configured (Solar flow sensor B63, Solar return
sensor B64). Collector sensor B6 is used if B63 is unavailable; the applicable
storage tank sensor B31/B41 is used if B64 is unavailable.
Pump capacity for the corresponding pump must be entered if there is no pulse
measurement.
The yield measurement then uses this volumetric flow (l/h) for the calculation.
Each pulse received can be interpreted as a value (kWh or liters).
The pulse value is defined using settings 3887-3889 (unit, counter and
denominator).
Solar compact controller
The settings in detail
31 / 64
CE1U2396en
18.08.2010