Siemens RVS41.813 User Manual page 166

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Siemens Switzerland Ltd
HVAC Products
Heat exchanger outside the storage tank and sensor
B36 in the flow (partial plant diagrams 22, 23)
The controller calculates the charging pump's speed
required to ensure that the charging temperature
acquired by sensor B36 is 2 K above the DHW
setpoint.
Heat exchanger outside the storage tank, with
primary controller.
The controller calculates the charging pump's speed
required to ensure that the charging temperature
acquired by sensor B35 is 2 K above the DHW
setpoint. In this case, primary controller sensor B35
must be located in the intermediate circuit.
If B36 is connected as well, B35 must be positioned
as the primary controller sensor. In this case, the
controller calculates the speed required to ensure that
the DHW setpoint + charging increase acquired by
sensor B35 is achieved.
Speed control of intermediate circuit pump Q33
The controller calculates the speed of the intermediate circuit pump required to ensure
that the return temperature acquired by sensor B36 is 2 K above the DHW setpoint.
If no B36 is connected, sensor B35 is used to make the calculation.
If no valid sensor is connected, the pump will not be speed-controlled.
User manual RVS61.843, RVS41.813
6 The settings in detail
B36
B3
Q3
B31
Q33
B36
B3
B35
Q3
B31
Q33
CE1U2355en_02
28. September 2009