flow, pump Q34 stops.
Configuration
When using the speed-controlled pump without mixing valve (left), pump Q34 must be
configured to multifunctional output QX4mod. Sensor B38 must be assigned to a
multifunctional input Bx.
In that case, flow switch (FS) is automatically assigned to digital input H1.
If, in place of modulating pump Q34, a pump with fixed speed (on / off) is used,
parameters 5530 (Pump speed min) and 5531 OEM (Pump speed max) must be set to
100%.
When using a mixing valve and a pump with fixed speed (right), parameter 6014
(Function mixing group 1) must be configured to "Instantaneous DHW heater". In that
case, the outputs used with the mixing heating circuit are assigned according to the
table on page 172 (parameter 6014).
In place of the mixing group in the controller, this function can also be assigned to an
extension module. In that case, parameter 6021 or 6022 must be configured to function
"Instantaneous DHW heater" and the assignment table on page 172 applies
(parameters 6020 and 6021).
Setpoints
Line no. Operating line
5406 Min setp diff to tank temp
The maximum DHW temperature setpoint controlled is the current storage tank
temperature minus the setpoint differential that can be adjusted here.
Speed-controlled pump
Only RVS61..
Only RVS61..
Line no. Operating line
5530 Pump speed min
The minimum speed of the pump for instantaneous DHW heater can be defined. It is
thus possible to negate the lowest pump speeds, which cannot be properly controlled.
Pump speed
min
Mixing valve control
Line no. Operating line
5544 Actuator running time
Only RVS61..
Setting the running time of the actuator used with the mixing valve.
ctuator running time
6.20 Configuration
Procedure
First, make use of the presetting choices and enter the plant diagram that comes
closest to the plant in question. Then, modify manually the individual partial diagrams to
match them to the actual requirements.
After that, select the extra functions and make the fine-tuning via the operating lines of
the individual parameters.
168/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009
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