1. Introduction
The Elitech ETC-60HT is a versatile digital temperature controller designed for precise temperature management in various cooling applications. It features a high-capacity 30A relay, capable of directly driving single-phase compressors up to 1.5 HP (240VAC). This manual provides essential information for the safe and effective installation, operation, and maintenance of your ETC-60HT controller.
2. Key Features
- Precise Temperature Control: Manages temperature based on set value and return difference.
- Advanced Defrost Control: Defrost cycles are controlled by both compressor stop time and defrost final temperature.
- Dual Sensor Input: Supports both cabinet temperature sensor and an optional evaporator sensor for enhanced monitoring.
- Password Protection: Includes a password lock function to prevent unauthorized operation.
- High Power Output: Equipped with a 30A/240VAC relay, suitable for directly driving single-phase compressors up to 1.5 HP.
3. Technical Specifications
| Parameter | Value |
|---|---|
| Temperature Measuring Range | -40°C to +70°C |
| Display Resolution | 1°C |
| Accuracy | ±1°C (between -40°C to +50°C); ±2°C (between -50°C to +70°C) |
| Cabinet Temperature Control Range | -40°C to +50°C |
| Power Supply | 220VAC ±10%, 50/60Hz |
| Power Consumption | <3W |
| Refrigerating Output Capacity | 30A/240VAC (max. 1.5HP single-phase compressor) |
| Defrosting Output | Natural defrosting (no dedicated output) |
| Sensor Type | NTC (2M cable length) |
| Operating Ambient Temperature | 0°C to +60°C |
| Storage Temperature | -30°C to +75°C |
| Relative Humidity | 20% to 85% (non-condensing) |
| Shell Material | ABS flame retardant material, amaranth polycarbonate panel |
4. Installation and Wiring
4.1. Dimensions and Panel Cutout
Ensure adequate space for installation and ventilation. Refer to the diagrams below for precise dimensions and panel cutout requirements.
4.2. Mounting the Controller
The controller is designed for panel mounting. Insert the controller into the prepared panel cutout and secure it using the provided clips or mounting hardware as shown in the diagram.
4.3. Wiring Diagram
WARNING: All wiring should be performed by a qualified electrician and comply with local electrical codes. Ensure power is disconnected before wiring to prevent electric shock.
Connect the power supply, sensors, and compressor according to the wiring diagram below. The controller requires a 220VAC input. Terminals 6, 7, and 8 are for the compressor and AC line connections.
4.4. Sensor Connection
Connect the NTC temperature sensor(s) to the designated terminals. The controller supports dual sensor input for cabinet and evaporator temperatures.
5. Operating Instructions
The ETC-60HT controller features a digital display and control buttons (SET, Up, Down) for configuration and monitoring.
5.1. Power On/Off
Once correctly wired and installed, apply power to the unit. The display will illuminate, showing the current temperature.
5.2. Setting Temperature
Press the "SET" button to enter the temperature setting mode. Use the "Up" and "Down" arrow buttons to adjust the desired temperature set point. Press "SET" again to confirm and exit.
5.3. Defrost Control
The controller manages defrost cycles automatically based on configured parameters, including compressor stop time and defrost final temperature. Specific programming steps for these parameters are typically detailed in the full product manual. Consult the manufacturer's comprehensive guide for advanced settings.
5.4. Password Lock Function
To prevent unauthorized changes, the controller includes a password lock function. Refer to the full product manual for instructions on how to activate, set, and disable the password.
6. Maintenance
- Cleaning: Regularly wipe the controller's surface with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Connection Check: Periodically inspect all wiring connections to ensure they are secure and free from corrosion.
- Sensor Inspection: Ensure temperature sensors are clean and properly positioned for accurate readings.
7. Troubleshooting
This section provides general guidance for common issues. For complex problems, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Controller not powering on | No power supply; incorrect wiring | Check power connections and ensure 220VAC supply. Verify wiring against diagram. |
| Inaccurate temperature reading | Faulty sensor; sensor improperly placed | Check sensor connection and placement. Replace sensor if damaged. |
| Compressor not activating | Incorrect temperature settings; wiring issue; compressor fault | Verify set temperature and differential. Check compressor wiring. Test compressor independently if possible. |
8. User Tips
- For optimal performance, ensure the temperature sensor is placed in a location that accurately reflects the temperature of the controlled environment, away from direct airflow or heat sources.
- When setting the temperature differential (hysteresis), consider the application to prevent rapid cycling of the compressor, which can reduce its lifespan.
- Always double-check wiring before applying power to avoid damage to the controller or connected equipment.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
