Robertshaw 5225-029 Limit Control

The Robertshaw 5225-029 Limit Control is a heavy-duty, factory-calibrated safety device engineered for commercial cooking and high-temperature appliance protection. As a fixed temperature limit control, this unit is set to trip at 435°F (224°C), making it a critical component for preventing over-temperature conditions in gas or electric fryers and specialty heating equipment. This LCH manual reset limit control features a 24-inch capillary length and a nickel-plated copper bulb, providing high thermal sensitivity and durability in harsh kitchen environments.

Designed with a trip-free manual reset switch, the 5225-029 ensures that the appliance cannot be restarted until the temperature has dropped approximately 50°F below the set point, forcing a technician to investigate the cause of the high-limit trip. This SPST high limit switch utilizes a negative-biased power element diaphragm for fail-safe operation; if the capillary loses its hydraulic charge, the control will automatically open the circuit to shut down the system. Rated for up to 30 Amps at 480V AC, this robust HVAC high limit thermostat is a standard-issue safety part for contractors servicing diverse commercial equipment.

• Fixed 435°F Calibration: Precision factory setting eliminates the risk of field adjustment errors, ensuring consistent commercial fryer safety.
• Manual Reset Security: The M2 trip-free reset button prevents the system from recycling until it is manually cleared by a professional.
• Fail-Safe Design: Negative-biased diaphragm tech ensures the Robertshaw 5225 series opens the circuit if the 24-inch capillary is damaged.
• High Electrical Capacity: Robust SPST contacts handle resistive loads up to 30A, suitable for high-draw heating elements.
• Durable Sensing Bulb: The nickel-plated copper bulb stands up to the corrosive conditions of commercial cooking oil and heat.

What happens if the capillary on the 5225-029 is kinked or broken?

Because this Robertshaw limit control uses a negative-biased power element, any loss of fluid in the 24-inch capillary will cause the switch to trip. This fail-safe feature prevents the heating system from operating without active temperature protection.

How do I reset the Robertshaw 5225-029 after a high-limit trip?

To perform a manual reset, the temperature at the sensing bulb must first drop roughly 50°F below the 435°F trip point. Once cooled, press the red reset button firmly. If the system continues to trip, the operating thermostat or contactor should be inspected for failure.

Is the Robertshaw 5225-029 compatible with millivolt systems?

The 5225-029 is a standard SPST switch with high amperage ratings. While it can physically break a circuit, technicians should verify if their specific application requires an LCHM manual reset model specifically optimized for low-voltage millivolt signals to ensure signal integrity.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.