Siemens LMV37.400A2 - Pressure Switch for Valve Proving (P LT X9-04)

37/213
Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.3.6 Pressure switch valve proving gas (P LT) X9–04
Input for the pressure switch valve proving (P LT) X9-04. The input is active only when
operating on gas and when valve proving is activated (see program sequence).
No. Parameter
241
Gas: Execution valve proving
0 = no valve proving
1 = valve proving on startup
2 = valve proving on shutdown
3 = valve proving on startup and shutdown
Protective earth (PE)
Pressure switch valve proving-gas
L´ for pressure switch
LMV...
X9-04
3
2
1
Figure 12: Pressure s witch valve proving gas (P LT) X9-04
Pressure switch valve proving (P LT)
Input for connection the valve proving with a specific pressure switch. The input is active
only when firing on gas and when the valve proving is activated.
Error
code
Diagnostic
code
Meaning for the LMV37.4... system
12 0 Fuel valve 1 (V1) leaking
1 Fuel valve 2 (V2) leaking
&
Note
When using configuration Valve proving via pressure switch-min-gas (Pmin), it is not
possible to use the input for Start release gas.