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Siemens Switzerland Ltd
User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
Priority
Line no. Operating line
3822 Charging prio storage tank
None
DHW storage tank
Buffer
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 for
solar charging and may charge the swimming pool before prior to 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.
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 Buffer setpoint (slave pointer) 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.
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 this parameter is disabled (---) charging proceeds in accordance with the "Charging
prio storage tank" settings.
During the period of time set, the transfer of priority is delayed. This prevents relative
priority from intervening too often.
Charging prio storage tank
Charging time relative prio
Waiting time relative prio
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