Siemens Burner Controllers LOK LGK Series
Siemens Burner Controllers LOK16 / LGK16 Series are industrial burner control units designed for medium- to high-capacity oil and gas burners, including dual-fuel applications. They support continuous operation with multistage or modulating burner control and feature self-checking flame supervision for enhanced combustion safety. The LOK16 uses an RAR9 silicon photocell detector, while the LGK16 supports QRA53/QRA55 flame detectors or an ionization probe. Suitable for industrial boilers, steam generators, and heating systems.
Product Details
Siemens Burner Controllers LOK LGK Series
Siemens Burner Controllers LOK16 / LGK16 Series
Siemens LOK16 / LGK16 Series are industrial burner control units designed to manage burner startup sequences, ignition, fuel valve operation, and flame supervision in medium- to high-capacity oil and gas burners, including dual-fuel combustion systems.
These controllers support continuous operation with multistage and modulating burner applications. Their integrated self-checking flame supervision system helps detect flame signal abnormalities and initiate appropriate safety actions.
Key Features
- Suitable for oil, gas, and dual-fuel burner applications
- Designed for medium- to high-capacity burners
- Supports continuous burner operation
- Compatible with multistage and modulating burners
- Integrated self-checking flame supervision
- Controls burner ignition and fuel valve sequences
- Supports air pressure monitoring and damper control
- Safety lockout function for abnormal conditions
- Compatible with specified flame detectors
LOK16 vs. LGK16 Series
- LOK16 Series: Designed for oil burner applications using the RAR9 silicon photocell flame detector.
- LGK16 Series: Designed for gas burner applications, supporting QRA53/QRA55 flame detectors or an ionization probe.
Typical Applications
- Industrial boiler systems
- Steam generators
- Industrial furnaces
- Industrial heating systems
- Continuous-duty combustion systems
- Compatible air heater applications
Model Selection Guidelines
Before selecting a Siemens LOK16 or LGK16 burner controller, verify the fuel type, burner configuration, supply voltage, operating sequence, flame detector compatibility, and existing control wiring. Proper model selection is essential for reliable burner operation and compliance with applicable safety requirements.
Technical Specifications
Siemens LOK16 / LGK16 Technical Specifications
| Brand | Siemens |
|---|---|
| Product Type | Burner Controllers |
| Series | LOK16 / LGK16 |
| Burner Application | Oil, Gas, and Dual-Fuel Burners, depending on configuration |
| Control Mode | Multistage / Modulating |
| Operation | Continuous Operation |
| Supply Voltage | AC 230 V (-15% / +10%) or AC 100-110 V, depending on model |
| Frequency | 50-60 Hz ±6% |
| Power Consumption | Approx. 3.5 VA |
| Built-in Fuse | T6.3H250V |
| External Primary Fuse | Max. 16 A (Slow) |
| Input Current at Terminal 1 | Max. 5 A |
| Control Terminal Load | Max. 4 A |
| LOK16 Flame Detector | RAR9 Silicon Photocell Detector |
| LGK16 Flame Detector | QRA53/QRA55 or Ionization Probe |
| Safety Functions | Self-Checking Flame Supervision / Safety Lockout |
| Operating Temperature | -20 to +60 °C |
| Relative Humidity | Less than 95% RH |
| Degree of Protection | IP40 when properly mounted, excluding terminal base |
| Safety Class | Class II |
| Weight | Approx. 1,000 g |
| Installation Altitude | Max. 2,000 m above sea level |
| Reference Standards | EN 298 / EN 60730-2-5 |
LOK16 Series Models
| Model | Prepurge (t1) | Safety Time (TSA) |
|---|---|---|
| LOK16.140A27 | 10 s | 4 s |
| LOK16.250A27 | 22 s | 5 s |
| LOK16.650A27 | 66 s | 5 s |
LGK16 Series Models
| Model | Prepurge (t1) | Safety Time (TSA) |
|---|---|---|
| LGK16.122A27 | 10 s | 2 s |
| LGK16.133A27 | 9 s | 3 s |
| LGK16.322A27 | 35.5 s | 2 s |
| LGK16.333A27 | 31.5 s | 3 s |
| LGK16.335A27 | 37 s | 2.5 s |
| LGK16.622A27 | 65 s | 2 s |
| LGK16.635A27 | 66 s | 2.5 s |
Note: Switching times are based on 50 Hz. At 60 Hz, the times are approximately 17% shorter. Plug-in bases and flame detectors are ordered separately. Verify the manufacturer's datasheet and model compatibility before installation or replacement.
Dimensions
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