System Makeup / Function Description - Siemens LME7 Series Manual

Building Technologies
2

System makeup / function description

The LME7 is a microprocessor-based burner control with matching system components
for the control and supervision of forced draft burners of medium to high capacity.
LME7 are used for the startup and supervision of 1- or 2-stage forced draft burners in
intermittent operation. The flame is supervised with an ionization probe, optionally with
flame detector QRA2, QRA4 or QRA10.
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Applications in accordance with EN 267:
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Applications in accordance with EN 676:
gaseous fuels
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Applications in accordance with EN 746-2:
Part 2: Safety requirements for combustion and fuel handling systems
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Type-tested and approved in accordance with DIN EN 298
Integrated in the LME7 basic unit are:
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Burner control
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BCI for connection a display or PC
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Only LME72 / LME73: Control for one actuator
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Lockout reset button (info button)
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3 multicolor signal lamp LED for operations and fault notifications
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Optional: Analog inputs for load controller DC 0...10 V, DC 0/4...20 mA, 0...135 Ω
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3 x 7-segment display for service, fault and operating state information
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Interface for program module
Figure 2: Example: Modulating gas burner
Basic Documentation LME7...
2 System makeup / function description
Gas burners for liquid fuels
Automatic forced draft burners for
Industrial thermoprocessing equipment -
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CC1P7105enr
17.04.2018