Description
The Heatcraft Refrigeration 5709L is a defrost limit switch engineered to deliver reliable, temperature-activated control of defrost cycles in commercial refrigeration systems. With a close setpoint of 35°F and an open setpoint of 55°F, this switch ensures that defrost heaters are energized and de-energized at precisely the right temperatures — protecting coils, extending equipment life, and maintaining optimal system efficiency.
Key Features
- Close setpoint: 35°F — activates defrost circuit at the correct low-temperature threshold
- Open setpoint: 55°F — terminates defrost cycle once the coil reaches the target temperature
- Designed as an OEM-quality replacement for Heatcraft refrigeration equipment
- Prevents over-defrost conditions that can lead to product temperature abuse
- Supports reliable, repeatable defrost termination for consistent system performance
Application
The 5709L defrost limit switch is suited for use in walk-in coolers, walk-in freezers, and other commercial refrigeration systems utilizing Heatcraft evaporator coils and unit coolers. It serves as a safety and control device that monitors coil temperature during the defrost cycle, cutting power to the defrost heater once the coil reaches 55°F to prevent unnecessary heat buildup and energy waste.
Product Specifications
- SKU: 5709L
- Brand: Heatcraft Refrigeration
- Type: Defrost Limit Switch
- Close Temperature: 35°F
- Open Temperature: 55°F
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