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Siemens Switzerland Ltd
User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
It is to be set whether the DHW storage tank receives its heat via the primary controller
or with the help of the system pump (depending on the type of plant).
It must be selected whether the DHW storage tank shall receive its heat from the solar
collectors.
Speed-controlled pump
Line no. Operating line
5101 Pump speed min
5102 Pump speed max
The speed of the charging pump is limited by a minimum and maximum speed.
To ensure that the pump operates reliably on startup, it is operated at maximum speed
for the first 10 seconds.
Speed control of charging pump Q3
Heat exchanger in the storage tank and sensor B36 in
the return.
The controller calculates the charging pump speed
required to ensure that the return temperature
acquired by sensor B36 is 2 K above the storage tank
temperature (B3).
2358A30
B3
Q3
B31
B36
Heat exchanger in storage tank, with primary
controller.
The controller calculates the positioning signal
required to ensure that the DHW setpoint + charging
increase acquired by sensor B35 is achieved.
2358A30
B3
Q3
Y31
B31
B35
Heat exchanger outside the storage tank and sensor
B36 in the flow (partial plant diagrams 22, 23)
The controller calculates the charging pump speed
required to ensure that the charging temperature
acquired by sensor B36 is 2 K above the DHW
setpoint.
2358A34
B3
Q3
B31
B36
Q33
With prim contr/system
pump
With solar integration
Speed control of charging
pump
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