Siemens LME72.000A2 - Gas Direct Ignition (G), 1-Stage, with Valve Proving; Gas Direct Ignition (G), 2-Stage, with Valve Proving

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Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 15 PME73.810... 29.11.2011
15.2.3 Gas direct ignition (G), 1-stage, with valve proving
SV
V1
Program
G
Gas direct 1-stage, with valve proving
X7-04
LME73.000...
V2
X7-02
Figure 41: Connection diagram fuel train gas direct ignition (G), 1-stage, with valve proving
15.2.4 Gas direct ignition (G), 2-stage, with valve proving
SV
V1
Program
G
Gas direct 2-stage, with valve proving
X7-01
LME73.000...
V2a
V2
X7-02 X7-04
Figure 42: Connection diagram fuel train gas direct ignition (G), 2-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!