Siemens LOK16 / LGK16 Series Burner Controllers
Product Description
Siemens Burner Controllers LOK16 / LGK16 Series
Siemens LOK16 / LGK16 Series are industrial burner control units developed for reliable burner startup sequencing, ignition control, fuel valve operation, and flame supervision in medium- to high-capacity oil and gas burner systems.
Designed for continuous operation, these controllers support multistage and modulating burner applications. Their self-checking flame supervision monitors the flame detection circuit and initiates a safety response when abnormal operating conditions occur.
Key Features
- Suitable for oil, gas, and compatible dual-fuel burner installations
- Designed for medium- to high-capacity industrial burners
- Supports continuous burner operation
- Suitable for multistage and modulating burner control
- Integrated self-checking flame supervision
- Controls burner ignition and fuel valve operating sequences
- Supports air pressure supervision and air damper control
- Safety lockout during specified fault conditions
- Compatible with designated Siemens flame detectors
LOK16 vs. LGK16 Series
- LOK16 Series: Designed primarily for oil burners using the Siemens RAR9 silicon photocell flame detector.
- LGK16 Series: Designed for gas burners using compatible QRA53/QRA55 UV flame detectors or ionization probes. Certain configurations also support dual-fuel applications.
Typical Applications
- Industrial steam and hot water boilers
- Industrial steam generators
- Industrial furnaces
- Industrial heating and combustion systems
- Continuous-duty burner installations
- Compatible direct-fired air heaters
Model Selection Guidelines
When selecting an LOK16 or LGK16 controller, verify the fuel type, burner configuration, supply voltage, flame detector, required program sequence, safety times, and existing control wiring.
Important: Plug-in bases and flame detectors are supplied separately. Installation, replacement, and commissioning must follow Siemens technical documentation and be performed by qualified personnel.
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 | <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 |
Technical Note: Switching times refer to 50 Hz operation. At 60 Hz, they are approximately 17% shorter. Listed A27 models use AC 230 V; corresponding AC 100-110 V versions use the A17 suffix where available. Plug-in bases and flame detectors must be ordered separately. Always confirm the applicable Siemens datasheet before installation or replacement.
Product 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 | <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 |
Technical Note: Switching times refer to 50 Hz operation. At 60 Hz, they are approximately 17% shorter. Listed A27 models use AC 230 V; corresponding AC 100-110 V versions use the A17 suffix where available. Plug-in bases and flame detectors must be ordered separately. Always confirm the applicable Siemens datasheet before installation or replacement.
Company Information
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