Air Pressure Switch (Aps) X3-02; Pressure Switch-Vp-Gas / Lt Or Closed Position Indicator (Cpi) X9-03; Pressure Switch-Min-Gas, Start Release Gas (Psmin-Gas) X9-03; Start Release Gas X7-03 (Only Lmv52 - Siemens LMV5 Series Basic Documentation

Air pressure switch (APS)
X3–02
Pressure switch-VP-gas /
LT or closed position
indicator (CPI)
X9–03
Note on a) and b)
Pressure switch-min-gas,
start release gas
(PSmin-gas)
X9–03
Start release gas
X7–03
(only LMV52...)
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An air pressure switch can be connected to these terminals. Air pressure is anticipated
after the fan has been switched on. If there is no pressure signal, at least safety
shutdown will occur. The input can be deactivated.
Parameter:
AirPressureTest (activated / deactivated)
The input can be configured either as pressure switch - valve proving - input (PS-VP)
or as a closed position indicator input (CPI).
a) Parameter:
Config_PS-VP/CPI (PS-VP)
The input is only active when firing on gas and when valve proving is activated.
→ Valve proving
b) Parameter:
Config_PS-VP/CPI (CPI)
CPI: The input is active in both gas- and oil-fired operation. It is used for checking the
gas valves' fully closed position. For that purpose, the gas valves' contacts for the fully
closed position are to be connected in series using this input.
If the signal received at this input does not correspond to the anticipated value, at least
safety shutdown will occur. The input can be deactivated by configuring the input as
PS-VP and by switching off valve proving (no LT).
Parameter:
Config_PS-VP/CPI (PS-VP)
Parameter:
ValveProvingType (No VP / VP startup / VP shutdown / VP
stup/shd)
The input is used for connecting the gas pressure switch-min and the start signal, e.g.
from the release contact of an external outside air damper. In that case, both signal
sources are to be connected in series. With the LMV52..., only gas pressure switch-min
is to be connected here; for start release, there is a specific input available (start
release gas). The input is only active when firing on gas and in the LOgp and HOgp
programs until the end of «TSA». It can be deactivated for oil programs LOgp and
HOgp. The signal is anticipated in Phase 21. If there is no gas pressure, the → gas
shortage program will be activated. Loss of gas pressure / start signal causes the
burner to shut down. The input can be deactivated.
Parameter:
GasPressureMin (activated / deact x OGP / deactivated)
2)
(activated / deactivated)
There is a delayed reaction to loss of gas pressure during «TSA1» and «TSA2» to
prevent shutdown caused by pressure shocks when the valves open.
Parameter:
PressReacTme
The input is used for connecting the start signal, e.g. from the release contact of an
external outside air damper. The input is only active when firing on gas and in programs
LOgp and HOgp until the end of TSA2. The signal is anticipated in Phase 21. Loss of
the start signal causes the burner to shut down. The input can be deactivated.
Parameter: StartReleaseGas (activated / deactivated)
Basic Documentation LMV51...
4 Burner control
Active inputs are checked for signal input.
2)
CC1P7550en
01.10.2003