1. Introduction
This manual provides essential information for the installation, operation, and maintenance of the Danfoss ERC 112C Electronic Control for Refrigeration Systems. The ERC 112C is a versatile electronic control unit designed for precise temperature management in various refrigeration applications. It features a blue display, 4 relay outputs, and is compatible with 110/220V power supplies. Please read this manual thoroughly before installation and operation to ensure safe and efficient use of the product.
2. Safety Information
- Electrical Hazard: Installation and servicing must be performed by qualified personnel only. Disconnect power before performing any work on the unit. The unit operates on 110/220V, specifically 220 volts as noted in important information.
- Proper Use: Use the ERC 112C only for its intended purpose as an electronic control for refrigeration systems.
- Environmental Conditions: Ensure the operating environment is within the specified temperature and humidity ranges to prevent damage to the unit.
- Sensor Compatibility: Note that temperature sensors are not included with this unit and must be acquired separately and correctly connected.
3. Product Overview
The Danfoss ERC 112C is equipped with a clear blue LED display and intuitive controls for easy monitoring and adjustment of refrigeration parameters. It features multiple relay outputs for controlling various components of a refrigeration system.
Figure 3.1: Front view of the Danfoss ERC 112C Electronic Control. This image displays the unit's blue LED screen, showing a temperature reading, along with the control buttons for settings adjustment and defrost initiation.
Figure 3.2: Angled front view of the Danfoss ERC 112C. This perspective highlights the compact design and the clear visibility of the blue digital display and user interface buttons.
Figure 3.3: Rear view of the Danfoss ERC 112C, detailing the wiring terminals. The label provides crucial information regarding electrical ratings and connection points for inputs (S1, S2, S3, S4) and outputs (DO1, DO2, DO3).
Figure 3.4: Detailed rear view of the Danfoss ERC 112C. This image provides a clearer look at the wiring schematic printed on the unit, essential for correct electrical installation and connection of sensors and relays.
4. Setup and Installation
4.1 Mounting
The ERC 112C is designed for panel mounting. Ensure adequate space for ventilation and access to wiring terminals. Refer to the product dimensions (3.88 x 2.13 x 3.63 inches) for precise cutout requirements.
4.2 Electrical Connections
The unit operates on 110/220V, with a specific note for 220 volts. All electrical wiring must comply with local and national electrical codes. Refer to the wiring diagrams on the back of the unit (Figures 3.3 and 3.4) for correct connection of power supply, temperature sensors (S1, S2, S3, S4), and relay outputs (DO1, DO2, DO3).
- Power Supply: Connect the appropriate voltage (110V or 220V) to the designated power terminals.
- Temperature Sensors: Connect two temperature sensors (not included) to the designated sensor inputs. Ensure correct polarity if applicable.
- Relay Outputs: Connect the refrigeration system components (e.g., compressor, fan, defrost heater) to the four relay outputs as per your system design.
It is highly recommended to consult a qualified electrician for installation to ensure safety and proper functionality.
5. Operation
5.1 Basic Display and Controls
The blue LED display shows the current temperature reading. The front panel features buttons for navigation and setting adjustments:
- SC Button: Typically used for defrost initiation or special functions.
- Up (Λ) Button: Used to increase values or navigate menus upwards.
- Down (V) Button: Used to decrease values or navigate menus downwards.
5.2 Setting Parameters
To access and modify parameters such as setpoint temperature, differential, and defrost cycles, refer to the detailed programming instructions provided in the complete Danfoss ERC 112C product manual. This unit allows for precise control over various refrigeration functions.
Note on Temperature Units: The unit's display can show temperature in Celsius or Fahrenheit. For instructions on how to change the temperature unit (e.g., from Celsius to Fahrenheit), please refer to the comprehensive Danfoss ERC 112C user manual or contact Danfoss technical support. This setting is typically found within the advanced configuration menu.
6. Maintenance
The Danfoss ERC 112C is designed for reliable operation with minimal maintenance. However, regular checks can help ensure its longevity and performance:
- Cleaning: Keep the front panel and display clean using a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Connections: Periodically check all electrical connections to ensure they are secure and free from corrosion.
- Ventilation: Ensure that the unit has adequate ventilation and that its vents are not obstructed.
For any internal maintenance or repairs, contact a qualified service technician.
7. Troubleshooting
If you encounter issues with your ERC 112C, consider the following basic troubleshooting steps:
- No Display/Power: Check the power supply connections and ensure the correct voltage (110/220V) is applied. Verify circuit breakers or fuses.
- Incorrect Temperature Reading: Verify that temperature sensors are correctly connected and not damaged. Ensure sensors are placed appropriately within the refrigeration system.
- Relay Malfunction: Check wiring to the relays and the connected components. Ensure the control parameters are set correctly.
- Unit Not Responding: Try cycling the power to the unit (turn off, wait 30 seconds, turn on). If issues persist, consult the full product manual for error codes or contact Danfoss technical support.
8. Specifications
| Feature | Specification |
|---|---|
| Model | ERC 112C |
| Manufacturer | Danfoss |
| Voltage | 110/220V (2.2E+2 Volts) |
| Display Type | LED (Blue Display) |
| Relay Output | 4 (DO1, DO2, DO3, and one not used/other functions) |
| Temperature Sensors | 2 (Not Included) |
| Item Weight | 7.8 ounces (0.49 LBR) |
| Product Dimensions | 3.88 x 2.13 x 3.63 inches |
| Color | Black |
| ASIN | B0CGGPC4QT |
| Date First Available | July 27, 2023 |
9. Warranty and Support
Danfoss products are manufactured to high quality standards and typically come with a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your purchase or visit the official Danfoss website.
For technical assistance, troubleshooting beyond this manual, or to inquire about replacement parts, please contact Danfoss customer support. You can find contact information on the Danfoss official website or through your local distributor.
Danfoss Official Website: www.danfoss.com
