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Spare parts for gas and oil burners and boilers: gas valves, nozzles, ignition electrodes and transformers, pressure switches, flame detectors, fuel pumps, servomotors and burner control boxes.

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Siemens Control box LME39.100C2

SKU LME39.100C2 Brand Siemens

Photos

Key specifications

Lockout on flame detection failure	Lockout
Fuel	gas
Firing stages	1- or 2-stage
Cycle type	intermittent
Remote reset signal	Remote electrical restart capability
Undervoltage detection	Yes
Restart limitation	Limited
Digital signal processing	Yes, precise sequence control
Maximum continuous operation time	24 hours

all specifications (9) ↓

272.46 EUR

247.69EUR

in stock · 1

incl. 21% VAT · 204.70 EUR excl. VAT · shipping calculated at checkout

Worldwide shipping from stock
Original manufacturer part
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Description

This is a Siemens LME39.100C2 control box for gas burners. It supports 1- or 2-stage burners and operates on an intermittent cycle with a maximum continuous operation time of 24 hours. It locks out on flame failure and offers remote electrical restart capability. It includes undervoltage detection, limited restart attempts, and digital signal processing for precise sequence control.

Further details

Air Pressure Monitoring	Functional check of air pressure relay during start-up and operation
Driven Components	Ignition transformer, fuel valve, fan relay
Flame Detector	Ionization electrode, QRA flame sensor (with AGQ3), or QRC blue flame sensor
Interchangeability	Not interchangeable across series within the same brand
Monitored Inputs	Air pressure switches and temperature limits
Operating sequence	Pre-purge, ignition spark, fuel valve opening, flame proving
Status indication	Multi-color: fault, operational messages, flame presence

Choosing and fitting

Replacement of this type of control box requires matching the exact series designation, supply voltage, safety time, pre-purge duration, flame detection method (ionisation, UV, or IR), and base or plug pattern. Controls from different series are not interchangeable even within the same brand; a mismatched safety time is a genuine safety hazard. Before installation, verify that the existing wiring base corresponds to the plug pattern and that the programmed safety times fit the burner design. Always confirm against the burner documentation.

All specifications

Lockout on flame detection failure	Lockout
Fuel	gas
Firing stages	1- or 2-stage
Cycle type	intermittent
Remote reset signal	Remote electrical restart capability
Undervoltage detection	Yes
Restart limitation	Limited
Digital signal processing	Yes, precise sequence control
Maximum continuous operation time	24 hours

Part numbers

SKU	LME39.100C2
Additional article	884.124.080