Solar - Siemens RVS41.813 User Manual

Solar

Solar controlling element
External solar exchanger
Siemens Switzerland Ltd
HVAC Products
The temperature differential at an outside temperature of -10 °C that is entered on this
operating line is transformed to the current composite outside temperature.
At an outside temperature of –10 °C, the flow temperature setpoint is reduced by the
set value, and there is no more reduction at an outside temperature of 20 °C.
T
TVL
5801
TRL
-10°C
Important!
Instead of entering the correct temperature differential at –10 °C, it is also possible to
enter 0 as the temperature differential. In that case, the heating curve must be set for
the return temperature setpoint. But this choice only exists for plants without mixing
heating circuit.
Parameter 5810 is active only if there is no buffer storage tank.
In cooling mode, the parameter has no impact. In the case of return temperature
control, the cooling curve must be based on the return temperature setpoint.
Line no. Operating line
5840 Solar controlling element
Charging pump
D iverting valve
5841 External solar exchanger
Jointly
DHW storage tank
B uffer storage tank
In place of a collector pump and diverting valves for integrating the storage tanks, the
solar plant can also be operated with charging pumps.
When using a diverting valve, it is always only one heat exchanger that can be used at
a time. Only alternative operation is possible.
When using a charging pump, all heat exchangers can be used at the same time.
Either parallel or alternative operation is possible.
In the case of solar plants with 2 storage tanks, it must be selected whether the
external heat exchanger shall be used for DHW and as a buffer storage tank, or
exclusively for one of the two.
User manual RVS61.843, RVS41.813
6 The settings in detail
TVL Flow temperature
t Return temperature
RL
Ta Outside temperature
20°C
Ta
173/258
CE1U2355en_02
28. September 2009