Controller Delay - Siemens LMS14 User Manual

Key
Building Technologies Division
6.11.17

Controller delay

The controller delay serves for stabilizing the combustion process, especially after a
cold start. After the burner control's release by the controller, the latter maintains the
parameterized output for a predefined period of time. The modulating controller – and
thus modulation – are released only when this period of time has elapsed.
The following graph shows an example:
Output
Figure 42: Control of the boiler/burner
Line no. Meaning
2452 LmodRgVz Controller delay speed
2453 ZReglVerz Controller delay duration
Via parameter is set to determine whether and how the controller delay shall act.
The controller delay can be deactivated.
Activation can take place in the case of heating requests only, DHW requests only, or
both.
The parameterized output in percent is limited to the available setting range of the
respective operating mode (heating circuit/DHW).
This means that in Heating mode, the parameterized Max fan speed heating mode is
used as the 100% value. In DHW mode, the maximum output is used as the 100%
value. Another parameter defines for what period of time the controller delay shall be
active.
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07.05.2014