External Boiler Controller On/Off = Heat Request (X5-03 Pin 1) - Siemens LMV50 Series Manual

Input for external
controller
(ON/OFF)
X5-03 pin 1
Β
46/327
Building Technologies
4.1.5.5

External boiler controller ON/OFF = heat request (X5-03 pin 1)

When the external control loop is closed, the signal from the integrated controller (if
present) is used to deliver the internal Heat request information to the input.
There is heat request when this external controller signal is pending and – if present
and configured – there is a request for heat from the internal load controller or from
BACS
When there is no more request for heat, the burner is shut down. Depending on the
parameterization, the fuel valves are either shut the moment the period of time is
completed by the timer, or after the MIN load is reached ↑ Low-fire shutdown. In
operation with the internal load controller or with load control, the input can be
deactivated via BACS. This means that a wire link at this controller input is not required.
In operating mode 1 (ExtLC X5-03), the input is always active, deactivation is not active
↑ operating modes with load controller.
Parameter InputController (activated / deactivated)
1)
(Parameter text) in Italics = text displayed on the
Note!
The input is also evaluated in manual mode!
Basic Documentation LMV5...
4 Burner control
1)
AZL5
CC1P7550en
22.05.2018