6.17 Buffer Storage Tank; Overview; Forced Charging - Siemens RVS41.813 User Manual

Pump capacity

Overview

Forced charging

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HVAC Products
The flow rate in l/h of the pump used must be determined and serves for calculating the
volume delivered.

6.17 Buffer storage tank

A buffer storage tank can be integrated in the plant. It can be
charged via the heat pump, by solar energy or by an electric
immersion heater. In the case of active cooling, it can also be
used for storing cooling energy.
B4
The controller controls heating / cooling and forced charging
of the buffer storage tank, protects it against
overtemperatures and maintains stratification whenever
possible.
B41
Line no. Operating line
4708 Forced charging setp cooling
4709 Forced charg setp heat min
4710 Forced charg setp heat max
4711 Forced charging time
4712 Forced charg duration max
To save electricity costs or to fully charge the storage tank before the heat pump is
locked, forced charging of the buffer storage tank can be triggered. This way, operation
of the heat pump is maintained until the required temperature setpoint for forced
charging (heating / cooling) in the buffer storage tank is reached, or until forced
charging is no longer released, or until the heat pump must be switched off.
When the plant is operating in cooling mode, "Forced charging setp cooling" is used. In
heating mode, the slave point is used for the setpoint. It can be limited with "Forced
charg setp heat min" (4709) and "Forced charg setp heat max" (4710).
Forced charging can be triggered either via low-tariff input E5 or operating line "Forced
charging time" (4711).
User manual RVS61.843, RVS41.813
6 The settings in detail
CE1U2355en_02
28. September 2009