Minimum Limitation Of Return Temperature - Siemens LMS14 User Manual

Return setpoint min
Return setpoint min OEM
Return influence
consumers
Building Technologies Division

6.11.10 Minimum limitation of return temperature

The required minimum setpoint of the return temperature can be parameterized. If the
boiler return temperature drops below the setpoint, maintained boiler return
temperature is activated.
In connection with the maintained boiler return temperature, the following functions can
be provided:

Locking signal acting on the consumers

Control of a modulating valve
Line no. Operating line
2270 Return setpoint min
The required minimum return temperature setpoint can be parameterized. If the boiler
return temperature falls below the return temperature setpoint, maintained boiler return
temperature becomes active.
Line no. Operating line
2271 Return setpoint min OEM
This minimum limitation of the return temperature OEM is the lower limit value for the
minimum return temperature setpoint.
Line no. Operating line
2272 Return influence consumers
Off
On
If, with the boiler released, the return temperature falls below the set minimum
temperature, a locking signal is calculated. With proper pump circuits (heating circuit
pump, DHW charging pump, external load), the consumer pumps are deactivated, or
stay deactivated, if the locking signal exceeds the relevant threshold value
Off
Function is deactivated.
On
Function is activated.
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07.05.2014