Air Pressure Switch (X3-02 Pin 1); Gas Pressure Switch - Valve Proving Or Valve Closure Contacts (X9-03 Pin 2) - Siemens LMV50 Series Manual

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4.1.5.7

Air pressure switch (X3-02 pin 1)

An air pressure switch can be connected to these terminals.
a) The input can be activated / deactivated.
When the input is activated, air pressure is anticipated after the fan has been
switched on.
If there is no pressure signal, safety shutdown is initiated in any case.
Parameter AirPressureTest (activated / deactivated)
b) In this setting, the signal of a connected air pressure switch is not evaluated in the
home run and standby phases but leads to start prevention if the signal is not
present.
In all other phases, a missing signal leads to safety shutdown in any case.
Parameter AirPressureTest (deactInStby)
4.1.5.8 Gas pressure switch - valve proving or valve closure contacts (X9-03
pin 2)
The input can be configured either as a pressure switch-valve proving input (PS-VP) or
as a closed position indicator input (CPI).
PD-VP
The input is only active when firing on gas and when valve proving is activated.
↑ valve proving of gas valves
Parameter PS-VP/CPI (PS-VP)
CPI Gas
CPI:
It is used for checking the gas valves' fully closed position.
For that purpose, the gas valves' closure contacts for the fully closed position are to be
connected in series using this input
The input is active in both gas- and oil-fired operation.
Gas-fired operation:
In phases 12 to 38 and phases 72 to 78, a check is made to ensure that the input is set
to On (valve closed) und in phases 54 and 60 to Off (valve open).
In standby, Off (valve open) leads to a start prevention with a display message.
The display message can be output with a time delay (can be set with parameter
DelayStartPrev).
Oil-fired operation:
In phases 12 to 38, 54, 60 and phases 72 to 78, a check is made to ensure that the
input is set to On (valve closed).
In standby Off (valve open) leads to a start prevention with a display message.
The display message can be output with a time delay (can be set with parameter
DelayStartPrev).
Parameter PS-VP/CPI (CPI or CPI Gas)
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CC1P7550en
22.05.2018