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Siemens
User Manual
CE1U2357en
Building Technologies
6 The settings in detail
2014-07-30
The storage tank is charged with an external control thermostat, but with setpoint
compensation of the controller.
Important: To ensure that setpoint compensation works correctly, the external control
thermostat must be set to its minimum setting value.
6.8 Configuration
Heating circuits 1 and 2
Line no.
Operating line
HC1 HC2
-
-
5700 5710 -
-
Heating circuit 1, 2
Using this setting, the heating cicuits can be switched on and off.
DHW sensor B3
Line no.
Operating line
5730
DHW sensor B3
Sensors
thermostat
Sensors
The collector calculates the switching points including the switching differential from the
DHW setpoint and the acquired DHW storage tank temperature.
Control thermostat
The DHW temperature is controlled based on the switching state of a control
thermostat connected to B3.
When using a DHW control thermostat, Reduced mode is not possible. This means that
when Reduced mode is active, DHW heating with the control thermostat is locked.
·
The adjustment of the nominal DHW temperature setpoint must be equal to or higher
than the setpoint adjustment on the control thermostat (thermostat calibrated at
switch-off point)
·
The flow temperature setpoint for DHW must be set to a minimum of 10 °C (with
impact on the charging time)
·
In that case, the DHW is not protected against frost
DHW controlling element Q3
Line no.
Operating line
5731
DHW actuating device Q3
None
charging pump
Diverting valve
None
No DHW charging via Q3.
Charging pump
The DHW is heated up with a pump connected to terminals Q3 / Y3.
Diverting valve
The DHW is heated up with a diverting valve connected to terminals Q3 / Y3. With this
setting, pump Q2 becomes a boiler pump, provided the boiler pump is not yet defined
for use at a multifunctional relay output QX...
output relay QX
Line no.
Operating line
5890
Relay output QX1