Priority
Line no.
Operating line
3822
Charging prio storage tank
None
DHW storage tank
Buffer storage tank
3825
Charging time relative prio
3826
Waiting time relative prio
3827
Waiting time parallel op
3828
Delay secondary pump
The priority circuit for the swimming pool (2065) can impact the storage tank priority of
solar charging and possibly charge the swimming pool before charging the storage
tanks.
If a plant uses several heat exchangers, it is possible to set a priority for the integrated
storage tanks, which defines the charging sequence.
Charging prio storage tank
None
Every storage tank is charged alternately for a temperature increase of 5 °C at a time,
until every setpoint of level A, B or C (see below) is reached. The setpoints of the next
higher level are approached only when all setpoints of the previous level have been
reached.
DHW storage tank
During solar charging, preference is given to the DHW storage tank. At every level A, B
or C (see below), it is charged with priority. Only then will the other consumers of the
same level be charged. As soon as all setpoints of a level are attained, those of the
next level are approached, whereby priority is again given to the DHW storage tank.
Buffer storage tank
During solar charging, preference is given to the buffer storage tank. At every level A, B
or C (see below), it is charged with priority. Only then will the other consumers of the
same level be charged. As soon as all setpoints of a level are attained, those of the
next level are approached, whereby priority is again given to the buffer storage tank.
Storage tank setpoints:
Level
DHW storage tank
Buffer storage tank
Swimming pool
(1)
A
1610
Nominal setpoint
Puffersollwert (Schleppzeiger) 2055
Setpoint solar heating
B
5050
Charging temp max
4750
Charging temp max
2055
Setpoint solar heating
C
5051
Storage tank temp
max
4751
Storage tank temp max
2070
Swimming pool temp
max
(1)
When priority for the swimming pool is activated (2065), the swimming pool is
charged before the storage tanks.
Charging time relative prio
If the preferred storage tank cannot be charged in accordance with charging control,
priority is transferred to the next storage tank or the swimming pool for the period of
time set (e.g. temperature differential between collector and storage tank too great).
As soon as the preferred storage tank (according to setting "Charging prio storage
tank") is again ready to be charged, the transfer of priority will immediately be stopped.
If the parameter is deactivated (---), priority always follows the settings "Charging
priority storage tank".
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Siemens Switzerland Ltd
User manual RVS61.843, RVS41.813
CE1U2355en_02
HVAC Products
6 The settings in detail
28. September 2009