Gas Pressure Switch-Min (Pmin), Start Release Gas X5-01 - Siemens LMV36.520A1 Basic Documentation

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7.3.6 Gas pressure switch-min (Pmin), start release gas X5–01
Input for connection of a pressure switch-min for gas: If the plant does not require a
pressure switch-min, a wire link must be fitted between pin 2 and 3.
Gas pressure switch-min
In all types of gas trains, minimum gas pressure is expected from phase 22. If no gas
pressure is detected when the maximum time (parameter 214) has elapsed, the gas
shortage program is started (refer to chapter Gas shortage program).
"L" for pressure switch
Gas pressure switch-min (Pmin)
Protective earth (PE)
Figure 22: Gas pressure switch-min (Pmin) X5-01
Caution!
The OEM must check to see whether the burner can be operated without
pressure switch-min. This may necessitate a special approval, depending on
the
type of application.
No. Parameter
214 Max. time start release
285 Oil: Gas pressure switch-min with «Lo Gp»
0 = inactive
1 = active
During the safety times (TSA1/TSA2), the signal received from pressure switch-min is
only assessed after a certain period of time in order to ignore the pressure shocks that
occur the moment the valves open. The time to elapse for signal assessment can be
parameterized.
No. Parameter
229 Gas: Time to respond to pressure faults within safety time 1 (TSA1) and safety
time 2 (TSA2)
329 Fuel 1 gas: Time to respond to pressure faults within safety time 1 (TSA1) and
safety time 2 (TSA2)
If there is no gas pressure, at least safety shutdown is initiated.
Error Diagnostic Meaning for the LMV36... system
code code
20 0 Pressure switch-min (Pmin)
No minimum gas pressure
20 1 Gas shortage start prevention
23 0 Pressure switch-min (Pmin)
No minimum gas pressure
23 1 Gas shortage start prevention
Basic documentation LMV36...
7 Basic unit
LMV...
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25.09.2013