Siemens LME7 Series - Connection Diagrams for Fuel Train Applications (Examples); Gas Direct Ignition (G), 1-Stage; Gas Direct Ignition (G), 1-Stage and Valve Proving

65/245
Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 12 PME71.901... 29.11.2011
12.2 Connection diagrams for fuel train
applications (examples)
12.2.1 Gas direct ignition (G), 1-stage
SV
V1
Program
G
Gas direct 1-stage
X7-04
LME71.000...
X7-01
Figure 22: Connection diagram fuel train gas direct ignition (G), 1-stage
12.2.2 Gas direct ignition (G), 1-stage and valve proving
SV
V1
Program
G
Gas direct 1-stage, with valve proving
X7-04
LME71.000...
V2
X7-01
Figure 23: Connection diagram fuel train gas direct ignition (G), 1-stage, with valve proving

Note:
When valve proving is activated (e.g. on shutdown), the load on the valve’s
terminals (according to chapter Technical data/Terminal rating Outputs) is
restricted.
Fuel valve 1 X7-04 pin 4/fuel valve 2 X7-02 pin 3/auxiliary output
 Rated voltage AC 120 V AC 230 V
50/60 Hz 50/60 Hz
 Rated current 1 A 1 A
 Power factor cos >0.4 cos >0.4
If the terminal load (according to chapter Technical data/Terminal rating
Outputs) is not reduced (max. rated current 2 A, cos >0.4), the design
lifetime will be reached after about 100,000 burner startup cycles!