Low Water Cutoff and Temperature Limit for Oil Boilers

Hydrolevel 48-3150 HydroStat – Intelligent Boiler Control with Integrated Safety

Designed for precision and protection, the Hydrolevel 48-3150 HydroStat combines a high-limit aquastat with a low water cutoff in a single, efficient control. It’s built to safeguard oil-fired boilers from operating under unsafe low water conditions while maintaining optimal system temperature. This controller is ideal for modern hydronic systems that require dependable temperature management and safety compliance in one device.

Engineered for Professional-Grade Performance

The HydroStat series is a go-to choice for contractors who prioritize reliability and system integrity. The 48-3150 model features advanced microprocessor-based controls, making it well-suited for both cold start and tankless coil systems. Its plug-and-play wiring and clear dial adjustments simplify setup without compromising control accuracy.

Key Advantages of the HydroStat 48-3150

• Low Water Cutoff Protection – Integrated safety shutoff prevents boiler operation under dry-fire conditions.
• Digital Temperature Monitoring – Real-time temperature display helps with diagnostics and performance optimization.
• Adjustable Settings – Dial controls for high limit and differential make it easy to tailor to system requirements.
• Cold Start & Tankless Coil Compatible – Versatile design supports various boiler configurations.
• Direct Replacement – Replaces many common aquastat models, streamlining retrofit and upgrade jobs.

Installation Guidance

Although the unit is designed with clear instructions and simplified wiring, it’s best installed by a qualified technician to ensure compliance with safety codes and correct integration with system components. Proper installation helps avoid nuisance shutdowns and ensures the control functions as intended.

What Contractors Need to Know

This unit is built for durability and jobsite efficiency. Its modular plug-in design, user-friendly display, and dependable switching make it an excellent upgrade for servicing or modernizing older systems. Whether replacing an outdated control or specifying a new build, the 48-3150 offers field-tested performance.

Technical Details

• Model: Hydrolevel 48-3150
• Functions: Temperature high limit and low water cutoff
• Applications: Oil-fired boilers (cold start and tankless coil systems)
• Display: Digital temperature readout
• Adjustment: Dial-set high limit and differential

Standout Features

• Built-In Diagnostics – Provides visual feedback for system monitoring.
• Solid-State Reliability – Engineered for consistent, long-term operation in demanding conditions.
• Safety Compliance – Meets modern code requirements with low water protection included.
• Efficient Serviceability – Compact design simplifies replacement and troubleshooting.

The Hydrolevel 48-3150 HydroStat is a trusted, high-performance solution for oil boiler control and protection. Backed by field-proven technology, it gives contractors the confidence to install or replace with ease, ensuring system longevity and operational safety.