Introduction
The Walfront STC-3008 is a microcomputer intelligent digital display thermostat designed for precise temperature control. It features a clear digital display and is suitable for a wide range of applications requiring automatic switching of refrigeration and heating devices. This manual provides detailed instructions for the installation, operation, and maintenance of your STC-3008 temperature controller.
Key Features
- Durable ABS flame retardant plastic shell for enhanced safety.
- Microcomputer intelligent digital display for accurate temperature readings.
- Equipped with a 1-meter sensor for convenient temperature detection.
- Large and clear digital display ensures high accuracy in temperature measurement and control.
- Ideal for automatic control of refrigeration and heating systems, such as those found in seafood machines and cooling water systems.
Specifications
| Product Model | STC-3008 |
| Optional Voltage | 12V/24V/110V - 220VAC |
| Temperature Control Range | -55°C to 120°C (-67°F to 248°F) |
| Display Type | LCD Digital Display |
| Power Consumption | Less than 3W |
| Temperature Measurement Accuracy | ±1°C (-50°C ~ 70°C) |
| Resolution | 0.1°C |
| Sensor Cable Length | Approx. 1 meter |
| Ambient Temperature | 0°C ~ 60°C |
| Relative Humidity | 20% ~ 85% (non-condensing) |
| Machine Size | Approx. 75 x 34.5 x 85mm (3 x 1.4 x 3.3in) |
| Installation Opening | Approx. 71 x 29mm (2.8 x 1.1in) |
| Housing Material | ABS Flame Retardant Plastic |
| Item Weight | 4.6 ounces |
| Manufacturer | Walfront |
| Country of Origin | China |
| UPC | 713135323523 |
Setup and Installation
Proper installation is crucial for the safe and effective operation of the STC-3008 controller. Please follow the wiring diagrams carefully.
Wiring Diagram
The STC-3008 supports two main wiring configurations: independent power supply for the load, and shared power supply for the load.
Figure 1: Wiring diagrams showing connections for independent load power supply and same load power supply. Ensure all connections are secure and correctly matched to the terminals.
- Power Supply: Connect the main power supply to terminals 1 and 2.
- Sensor Connection: Connect the temperature sensor to terminals 3 and 4.
- Output 1 (Heating/Cooling Device 1): Connect the first controlled device to terminals 5 and 6.
- Output 2 (Heating/Cooling Device 2): Connect the second controlled device to terminals 7 and 8.
- Important Note: Strictly distinguish the interface of relay, sensor, and power. Ensure the sensor down-lead and power wire are kept at a proper distance to avoid interference.
Operating Instructions
This section details how to operate your STC-3008 temperature controller, including understanding the panel and setting temperature parameters.
STC-3008 Panel Introduction
Figure 2: Overview of the STC-3008 control panel, indicating the display areas and button functions.
- First Group Indicator Light: Illuminates when the first output is active.
- Second Group Indicator Light: Illuminates when the second output is active.
- First Group Temperature Detection Value: Displays the current temperature for the first control group.
- Second Group Temperature Detection Value: Displays the current temperature for the second control group.
- First Group Start Temperature Adjustment Button (Up Arrow): Used to increase the start temperature for the first group.
- First Group Stop Temperature Adjustment Button (Down Arrow): Used to decrease the stop temperature for the first group.
- Second Group Start Temperature Adjustment Button (Up Arrow): Used to increase the start temperature for the second group.
- Second Group Stop Temperature Adjustment Button (Down Arrow): Used to decrease the stop temperature for the second group.
Setting Temperature Parameters
- To Set Start Temperature: Press and hold the "Up Arrow" button for the desired group (First or Second) until the display flashes. Use the "Up" and "Down" arrows to adjust the value. Press the "Power" button (or wait a few seconds) to confirm.
- To Set Stop Temperature: Press and hold the "Down Arrow" button for the desired group (First or Second) until the display flashes. Use the "Up" and "Down" arrows to adjust the value. Press the "Power" button (or wait a few seconds) to confirm.
- The controller will automatically switch the connected heating or cooling device on/off based on the set start and stop temperatures.
Applications
The Walfront STC-3008 Digital Temperature Controller is versatile and can be applied in various environments requiring precise temperature regulation.
Figure 3: Examples of environments where the STC-3008 can be effectively utilized for temperature control.
- Farms: Essential for intensive livestock farming to maintain optimal environmental temperatures for animal health and growth.
- Greenhouses: Crucial for intensive agriculture to control temperature for plant cultivation and growth.
- Large Storage Coolers: Ensures precise temperature management for preserving goods in cold storage facilities.
- Other applications include seafood machines, cooling water machines, and various industrial or domestic temperature control systems.
Troubleshooting
If you encounter issues with your STC-3008 controller, refer to the following common problems and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display shows "LLL" or "HHH" | Sensor error or temperature out of range. | Check sensor connection. Ensure sensor is within the operating temperature range (-50°C to 70°C). Replace sensor if damaged. |
| Controller not turning device on/off | Incorrect temperature settings, wiring issue, or device malfunction. | Verify start and stop temperature settings. Check all wiring connections for looseness or incorrect placement. Test the connected device independently. |
| Inaccurate temperature reading | Sensor placement, interference, or sensor calibration. | Ensure sensor is placed correctly and not exposed to direct heat/cold sources that don't reflect the desired measurement area. Check for electromagnetic interference. While the unit is factory calibrated, significant discrepancies might indicate a faulty sensor. |
| No display/Power issue | No power supply or faulty wiring. | Check power source and ensure it matches the controller's voltage (12V/24V/110V-220VAC). Verify power supply wiring to terminals 1 and 2. |
Maintenance
To ensure the longevity and optimal performance of your Walfront STC-3008 temperature controller, follow these maintenance guidelines:
- Cleaning: Regularly wipe the display and casing with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the plastic.
- Environmental Conditions: Ensure the controller is operated within the specified ambient temperature (0~60°C) and humidity (20%~85% non-condensing) ranges.
- Sensor Care: Keep the temperature sensor clean and free from debris. Avoid bending or damaging the sensor cable.
- Connection Checks: Periodically inspect all wiring connections to ensure they remain secure and free from corrosion.
- Ventilation: Ensure adequate ventilation around the unit to prevent overheating, especially if installed in an enclosed space.
Warranty and Support
Walfront products are manufactured to high quality standards. For specific warranty information or technical support, please refer to the documentation provided with your purchase or contact Walfront customer service directly.
You can visit the official Walfront store on Amazon for more information and contact options: Walfront Store
