L4079 Series
High-Limit Controllers
Critical safety pressure controllers for industrial steam and boiler systems. Protect your equipment with reliable over-pressure shutdown.
What is the Honeywell L4079 Series?
The Honeywell L4079 Series consists of high-limit and safety pressure controllers specifically designed to protect industrial steam and boiler systems from over-pressure conditions.
These controllers operate as critical safety devices, initiating shutdown or control action when pressure exceeds predefined safe limits.
How does the Honeywell L4079 Series work?
L4079 Series controllers are widely used in:
- Industrial steam boiler safety systems
- High-limit pressure shutdown applications
- Boiler and HVAC system safety control
- Systems requiring automatic recycle or manual reset protection
Key Differences
Key Differences & Selection
Key differences between L4079 models include:
- Reset Function: Options for Manual Reset (requiring operator intervention) or Automatic Recycle.
- Pressure Range: Varying pressure ranges and limit setting capabilities.
- Application Focus: Specialized for steam boilers vs. general HVAC safety.
- Duty Cycle: Heavy-duty variants available for continuous industrial operation.
Applications
- Industrial steam boiler safety
- High-limit pressure shutdown
- Boiler & HVAC system protection
- Manual reset safety applications
- Automatic recycle pressure control
Model Comparison
| Model | Control Function | Reset Type | Typical Application |
|---|---|---|---|
| L4079A1050/U | High-Limit Safety | Manual Reset | Safety shutdown |
| L4079B1033/U | High-Limit Safety | Auto Recycle | Steam systems |
| L4079B1041/U | Safety Pressure Control | Auto Recycle | Boiler & HVAC |
| L4079B1066/U | Heavy-Duty Safety Control | Auto Recycle | Industrial boilers |
Manual Reset
Requires manual intervention to reset after safety shutdown.
Auto Recycle
Automatically resets when pressure returns to safe levels.
Heavy Duty
Robust construction for continuous industrial boiler operations.
Safety Control
Critical over-pressure protection for steam and boiler systems.
Frequently Asked Questions
What is the primary function of the Honeywell L4079 Series?
The Honeywell L4079 Series is designed to provide precise and reliable control for industrial combustion systems, ensuring optimal performance, safety, and energy efficiency across various heating applications.
How do I select the right model within the L4079 Series?
Selecting the correct model depends on your specific application requirements, including operating voltage, required torque or capacity, and control logic (e.g., on-off vs. modulating). Refer to the model overview table above or contact our engineering team for technical assistance.
Are L4079 Series components suitable for retrofitting existing systems?
Yes, Honeywell designs the L4079 Series with standardization in mind, making them excellent choices for both new installations and retrofitting older or legacy combustion systems to meet modern safety and emissions standards.
All L4079 Series Models
Ensure System Safety
Contact our team for L4079 safety controller selection and compliance advice.