27-30 UTI
February 13, 2025
KF8896 SIEMENS
February 13, 2025
LFS1.11A2v SIEMENS Flame Safeguard Control Unit
The LFS1.11A2v SIEMENS (Model: LFS1.11A2v, BPZ:LFS1.11A2v) is a specialized flame safeguard control unit manufactured by Siemens Building Technologies. Engineered for universal use in industrial combustion plants, the LFS1.11A2v SIEMENS supervises gas and oil flames in continuous or intermittent operation, interfacing directly with flame detectors to ensure reliable safety shutdown upon loss of flame signal.
Housed in a compact plug-in thermoplastic enclosure, the LFS1.11A2v SIEMENS operates on 230V AC power supply and supports connection to ionization probes, UV flame detectors (such as QRA series), or photo-resistive sensors. Featuring high immunity to mains voltage fluctuations and fast flame failure response times, it serves as an essential safety component for commercial boilers, process furnaces, and marine incinerators.
Key Features of the LFS1.11A2v SIEMENS
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Universal Flame Safeguard Control: Supervises gas, oil, or dual-fuel burner flames in continuous or intermittent duty cycles.
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Multi-Detector Compatibility: Interfacing with ionization sensors, photo-resistive detectors, or Siemens QRA… UV flame sensors.
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Rapid Safety Shutdown: Quickly cuts fuel safety shutoff valves upon flame extinction or signal loss to prevent unburned fuel build-up.
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Plug-In Base Mounting: Designed for fast installation into standard Siemens AGK11 or compatible terminal bases for easy maintenance.
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High Electrical Fault Immunity: Built-in surge protection guards internal logic components against power line transients and inductive interference.
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Status & Fault Indication: Features visual indication of operational status, flame signal presence, and lock-out fault conditions.
Primary Applications
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Industrial Process Furnaces & Kilns: Continuous flame supervision on process heating skids and thermal oxidizers
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Commercial Gas & Oil Boilers: Flame safety control for central heating plants, steam generators, and hot water boilers
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Marine Auxiliary Boilers: Shipboard flame monitoring for auxiliary oil-fired boilers and waste incinerators
Technical Specifications
| Parameter Category | Specification Details |
| Manufacturer / Brand | Siemens Building Technologies |
| Part Number / Keyword | LFS1.11A2v SIEMENS (LFS1.11A2v / BPZ:LFS1.11A2v) |
| Device Type | Flame Safeguard Control Unit |
| Mains Voltage / Frequency | 230V AC (+10% / -15%), 50/60 Hz |
| Power Consumption | Approx. 3.5 VA |
| Flame Detector Types | Ionization probe, UV detector (QRA…), Photo-resistive |
| Flame Failure Response Time | < 1 second |
| Enclosure Material | Heat-resistant, impact-resistant synthetic housing |
| Mounting Orientation | Plug-in base mounting (Compatible with AGK11 base) |
| Operating Temperature | -20°C to +60°C (-4°F to 140°F) |
| Dimensions (W x H x D) | 91 x 62 x 63 mm |
| Weight | Approx. 0.16 kg |
Package Contents
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1 × LFS1.11A2v SIEMENS Flame Safeguard Controller Unit
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Quick Setup & Wiring Instruction Sheet