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Automation of Refrigeration Equipment with Full Gauge TC-900E Electronic Controller

In this article, we will explore how an electronic controller functions in refrigeration equipment, the step-by-step installation process, and the benefits it brings to system operation.

What is an Electronic Controller?

An electronic controller automates a refrigeration system, managing the activation and deactivation of the compressor, evaporator and condenser fans, and defrost resistance.

Basic Operation

Temperature Sensors
The system employs two sensors:

  • Load Sensor: Detects the temperature of the refrigerated products or environment.
  • Freeze Sensor: Monitors the evaporator’s temperature and detects frost formation.

Internal Electronic Switches
The controller includes switches that regulate current flow to the compressor, fans, and defrost resistance.

Cooling Cycle

  • When the sensor detects a temperature above the desired setpoint, the controller activates the compressor and fans.
  • Once the programmed temperature is reached, the compressor stops, but the fans remain active to balance the system.

Defrost Cycle

  • If excessive frost is detected or the programmed defrost time is reached, the controller activates the defrost resistance.
  • After the defrost process, the resistance is deactivated, and the compressor and fans resume operation.

Steps to Install an Electronic Controller (Example: Full Gauge TC-900E)

  1. Prepare the Panel
    • Make a 71 x 29 mm cutout in the panel or cabinet where the controller will be installed.
    • Insert the controller, securing it with side clips, and ensure the rubber seal is properly fitted to prevent leaks.
  2. Connect Electrical Power
    Depending on the controller model:
    • 115V: Use pins 9 (neutral) and 10 (line). Also, supply terminals 12 and 16.
    • 230V: Use pins 9 (neutral) and 11 (line). Similarly, supply terminals 12 and 16.
    • 12V or 24V: Configure the pins and terminals according to the device’s specifications and available voltage.
  3. Connect Sensors
    • Sensor S1 (Ambient): Connect to terminals 1 and 2. This sensor monitors the controlled space temperature.
    • Sensor S2 (Evaporator): Connect to terminals TR and CU, securing it to the evaporator with a metal clamp.
    • Optional Sensor: If a third sensor or digital input is available, connect it to terminals 5 and 6.
  4. Connect Loads
    • Compressor: Connect to terminal 15 for the main power supply.
    • Defrost Resistance: Connect to terminal 14 for the first supply.
    • Fans: Connect to terminal 17 for power.
  5. Configure and Power Up the Controller
    • Program the parameters according to application requirements.
    • Turn on the controller and verify its operation through performance tests.

Benefits of Automation with Electronic Controllers

  • Precision: Maintains optimal temperatures consistently.
  • Energy Efficiency: Reduces electricity consumption by controlling the operational time of each component.
  • System Protection: Prevents damage from overload or frost accumulation.
  • Ease of Use: Allows customized adjustments according to user needs.

With the Full Gauge TC-900E, refrigeration systems can achieve greater reliability, efficiency, and convenience in operation.

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