Description The Honeywell L480B is a low-limit temperature controller designed for use in air conditioning systems and refrigerated enclosures. Technical Specifications Condition New/Never Used Surplus Brand Honeywell Category HVAC Controls Part Number L480B Subcategory Mechanical Temperature Controllers Switching Action Breaks control circuit on temperature fall. Manual reset DC Rating 0.2A at 120 VDC, 0.1A at 240 VDC Pilot Duty Rating 125 VA Ambient Temperature Range -20°F to +125°F (-11°C to +52°C) Maximum Sensor Temperature 225°F (107°C) Operating Temperature Range 20°F to 60°F (-5°C to +15°C); Dual Fahrenheit/Celsiusscaleplate Temperature Sensing Means 20 ft (6m) element, no sensing bulb Temperature Setting Means A slotted screw at the top of the controller. The setpoint isindicated through a scale opening in the cover Differential Nonadjustable, additive, and fixed, 10°F (6°C) maximum Finish Gray Mounting Means Mounting lugs located on back of case Weight 1.6 lbs Information About L480B The Honeywell L480B is a low-limit mechanical temperature controller designed for use in air conditioning and refrigeration systems to prevent coil freeze-up or ensure temperature safety in cooling environments. Commonly referred to as a "freezestat," it monitors air or surface temperature and automatically resets if temperature conditions return to safe levels. It features a 20-foot capillary sensing element and is built for dependable operation in applications such as display cases, beverage coolers, freezer cabinets, and walk-in units. The L480B is widely used in commercial refrigeration and agricultural frost protection. Key Features: Application-Specific Design: Ideal for refrigerated enclosures, air handlers, and frost monitoring systems. Temperature Range: Adjustable setpoint from 20°F to 60°F (–6.7°C to 15.6°C). Fixed Differential: 10°F (5.6°C) differential provides consistent performance and reset behavior. Capillary Sensing Element: Includes a 20-foot (6.1 m) capillary tube for remote sensing. Switch Type: SPDT (Single Pole, Double Throw) switch with automatic reset for reliable temperature control. Rugged Construction: Enclosed dustproof and moisture-resistant switch housing enhances durability. Mounting Flexibility: Can be mounted horizontally or vertically for versatile installation. Voltage Compatibility: Rated for 120/240 VAC operation. Certifications: UL Listed and CSA Certified for safety compliance. Weight: Approximately 1.6 lbs (0.73 kg) The L480B offers reliable and simple protection against low-temperature damage in refrigeration and HVAC systems. With its extended sensing capability and durable design, it is a trusted solution for maintaining temperature stability in both commercial and agricultural environments.
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