The A525 Electronic Refrigeration Controller with Adaptive Defrost provides refrigerated
space control and defrost control for medium and lowtemperature refrigeration applications. It has five line-voltage relays to control the compressor, defrost functions, high and low speed evaporator fans, and user-provided alarms. The controller can also control resistive heat, hot-gas bypass, off-cycle defrost, and two-speed evaporator fans. The adaptive defrost feature adjusts the defrost schedule to the minimum number of defrost intervals required to maintain peak efficiency, save energy, and maintain consistent space temperature. The Controller has an IP65 enclosure with holes in the enclosure base for wall-surface mounting.

• Plain Language Programming, displays a scrolling alpha-numeric message system that tells you what you need to program.
• Adaptive or Time-Based Defrost: offers you a choice between a conventional time based defrost or the more advanced adaptive defrost that learns and automatically adjusts the defrost schedule of your system to improve efficiency.
• Meets Title 24 Evaporator Fan Efficiency Standards
• Complete Integration with PENN Quick Response Expansion Valve and Precision Superheat Controller
• Alarming: allows you to program the Controller for high temperature conditions, low temperatures, door open, man-in-room, refrigeration leaks, high system pressure, low pressure, and sensor failures. The system displays each failure in plain language to avoid confusion about the cause of an alarm.
• Reporting and Recording: automatically records temperature at desired intervals.
• Program Copy and Firmware UpdatesÑFeatures a USB port that you can use to upload your preferred settings or to update the operating firmware when new versions are available.