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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 4 Burner control 13.08.2004
The input can be configured either as a 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.
With the LMV52..., this input has been extended by the function of a CPI contact for oil
valves. Setting «CPI Gas» corresponds to the function of the LMV51...
c) Parameter LMV52...: Config_DW-DK/CPI (CPI Gas+Oil)
In Phases 54 through 60 of gas and oil firing, the input is checked for «Off» (valve fully
open). The CPI contacts of the gas and oil valves must be connected in series and then
to this input.
d) Parameter LMV52...: Config_DW-DK/CPI (CPI Oil)
In Phases 54 through 60 of oil firing, the input is checked for «Off» (valve fully open)
and, in the case of gas firing, for «On» (valve fully closed).
If the signal received at this input does not correspond to the anticipated value, safety
shutdown will occur in any case. 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 re-
lease gas). The input is only active when firing on gas and in the LOgp and HOgp pro-
grams 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)
2)
(activated / deactivated) Active inputs are checked for signal input.
There is a delayed reaction to loss of gas pressure during «TSA1» and «TSA2» to pre-
vent shutdown caused by pressure shocks when the valves open.
Parameter: PressReacTme
Pressure switch-VP-gas /
LT or closed position in-
dicator (CPI)
X9–03
Function extension
CPI Oil,
only with LMV52...
Note on a) and b)
Pressure switch-min-gas,
start release gas
(PSmin-gas)
X9–03
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