Honeywell l480g1044 Frost Alarm Temperature Controller

Product Description

The HONEYWELL l480g1044 is a manual-reset low-temperature controller designed to detect frost conditions and trigger a switching action before temperatures damage crops, equipment, or refrigerated inventory. The unit operates across a setting range of 20 to 60 degrees F with a fixed differential of 15 degrees F, making it well suited to tight cold-storage and refrigeration applications. Switching action is SPDT, and voltage compatibility spans 120 to 240 volts AC at 50/60 Hz. The enclosed snap switch is rated dustproof and moisture-proof for dependable long-term service in harsh storage environments. A dual-scale temperature plate is included for both Fahrenheit and Celsius readings. HVAC technicians, refrigeration techs, and agricultural equipment specialists are the primary installers.

This controller is used in applications where undetected frost or low-temperature excursions would cause significant loss. Typical deployments include storehouses, orchards, air conditioning systems, refrigerated enclosures, display cases, beverage coolers, and milk cooling tanks. The manual-reset design ensures that a technician must physically acknowledge and clear a frost event before the controlled circuit is re-energized, preventing automatic restart under still-unsafe conditions. Mounting is horizontal or vertical, giving installers flexibility in panel or wall configurations.

Key Features

• Manual-reset action requires deliberate technician intervention after a frost event before circuit re-energization
• Setting range of 20 to 60 degrees F with a 15-degree F differential for precise low-temperature control
• SPDT snap switch rated 10.2 amps at 120 volts AC and 6.5 amps at 240 volts AC full load
• Dustproof and moisture-proof enclosed switch for reliable operation in cold, humid, or dusty environments
• Dual Fahrenheit and Celsius scale plate included
• UL and CSA listed; supports 50/60 Hz systems

Compatibility

Designed for use in storehouses, orchards, air conditioning systems, refrigerated enclosures, display cases, beverage coolers, and milk cooling tanks requiring low-temperature limit or frost alarm control across 120 to 240 volt AC circuits.

Installation Notes

Installation should be performed by a licensed refrigeration technician or HVAC professional. De-energize the controlled circuit and verify zero voltage before wiring the controller. The capillary bulb must be positioned at the sensing location without kinking the capillary tube. Follow NEC guidelines for low-voltage control wiring and ensure the enclosure rating is appropriate for the installation environment.