Siemens AVS75.39 Series User Manual page 129

DHW protection
combination
Minimum charging
setpoint solar
Overtemperature
protection
Storage tank temp max
Siemens
Building Technologies
For combi storage tank without charging pump/diverting valve Q3, the heat
demand cannot be recharged for room heating (lower part of the storage tank)
without mixing the upper storage tank). As a result, it must ensure that the flow
entering into the storage tank from the tank is not too cold.
The function can be activated/deactivated.
Off
The function is deactivated. Head request for room heating is not increased.
Hydraulic integration of the combi storage tank ensures DHW stratification
protection.
On
The function is on. Head request for room heating is increased for DHW protection.
The request to the source increases at a minimum the present DHW temperature.
The minimum limitation is activated at most up to the DHW nominal setpoint.
The solar plant can first charge the buffer storage tank when the minimum charging
setpoint is achieved in the solar circuit to avoid destroying stratification in the buffer
storage tank.
Line no. Operating line
4750 Charging temp max
4751 Storage tank temp max
Solar energy charges the buffer storage tank until the set maximum charging
temperature is reached.
Function "Overtemperature protection for the collector" can reactivate the collector
pump until the maximum storage tank temperature is reached.
If the storage tank reaches the maximum storage tank temperature set here, the
collector pump will be deactivated. It will be released again when the storage tank
temperature has dropped 1 °C below the maximum.
T
TSpMax
TSp
1
L
0
TSpMax Storage tank temp max (operating line 5051)
TSp Storage tank temperature actual value
L Storage tank charging: 1 = on, 0 = off
User manual RVS43.345
The settings in detail
1°C
t
129 / 239
CE1U2354en_021
2013-09-02