Walfront STC-3008 Digital Temperature Controller Thermostat User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the Walfront STC-3008 Digital Temperature Controller. This device is designed for precise temperature regulation in various applications such as refrigerators, greenhouses, aquariums, freezers, and ovens. Please read this manual thoroughly before use to ensure proper function and safety.

2. Safety Information

• Ensure the power supply voltage matches the controller's specified voltage (DC12V, DC24V, or 110-220VAC). Incorrect voltage can damage the device.
• All wiring should be performed by a qualified professional to prevent electrical hazards.
• Do not expose the controller or probes to excessive moisture or extreme temperatures outside their operating range.
• Keep the device away from flammable materials.
• Regularly inspect wiring for damage and ensure secure connections.
• The temperature probe is sensitive; handle with care to avoid damage.

3. Product Overview

The Walfront STC-3008 is a digital thermostat featuring a clear screen display for precise temperature monitoring and control. It is housed in an ABS flame-retardant plastic shell for durability and safety.

Key Features:

• Digital display for clear temperature readings.
• High-sensitivity and accurate temperature probes.
• Adjustable temperature control settings.
• Durable ABS flame-retardant plastic casing.
• Wide temperature control range: -55°C to +110°C.
• Temperature measurement accuracy: ±1°C (-50°C to 70°C).

Components:

• STC-3008 Digital Temperature Controller Unit
• Temperature Probe(s) (1 meter length)

Image 3.1: The Walfront STC-3008 Digital Temperature Controller unit shown with its connected temperature probe. The wiring diagram is visible on the top label of the controller.

4. Setup

4.1 Installation

The STC-3008 controller is designed for panel mounting. The installation opening dimensions are approximately 71mm x 29mm. Ensure sufficient space for ventilation and wiring connections.

4.2 Wiring Instructions

Refer to the wiring diagram located on the back label of the controller for correct connections. It is crucial to distinguish the interface of the relay, sensor, and power supply. Maintain proper distance between sensor lead and power wires to avoid interference.

Image 4.1: Top view of the STC-3008 controller, clearly showing the wiring diagram on the label. The diagram indicates connections for power supply, sensor, and output relays.

General Wiring Guide:

• Power Supply: Connect the appropriate DC12V, DC24V, or 110-220VAC power to terminals 1 and 2 as indicated on the diagram.
• Sensor: Connect the temperature probe(s) to the designated sensor terminals (e.g., 3 and 4).
• Output: Connect your heating or cooling device to the output relay terminals (e.g., 5/6 and 7/8 for OUT1, 9/10 for OUT2). The output capacity is 10A.

Caution: Double-check all wiring connections before applying power to prevent damage to the controller or connected devices.

5. Operating Instructions

The STC-3008 features two digital displays and control buttons for setting and monitoring temperatures.

Image 5.1: Close-up of the STC-3008 front panel, showing the two digital displays (OUT1 and OUT2) and the four control buttons for setting parameters.

5.1 Power On/Off

Once wired correctly, the device will power on automatically when electricity is supplied. There is no dedicated power button.

5.2 Setting Temperature Parameters

The controller typically allows setting a desired temperature (set point) and a hysteresis (temperature difference for switching). Specific button functions may vary slightly, but generally involve:

• Viewing Set Point: A short press of a 'SET' or similar button might display the current set temperature.
• Entering Setting Mode: A long press (e.g., 3-5 seconds) of a 'SET' button usually enters the parameter setting mode.
• Adjusting Values: Use the 'Up' (▲) and 'Down' (▼) buttons to increase or decrease the temperature values or other parameters.
• Confirming Settings: Press 'SET' again or wait for a few seconds for the device to automatically save and exit the setting mode.

Consult the specific instructions printed on the device label or a more detailed diagram for precise button functions and parameter codes (e.g., F1, F2, F3 for set point, hysteresis, calibration).

5.3 Display Indicators

• The left display (OUT1) shows the current temperature measured by the first probe.
• The right display (OUT2) shows the current temperature measured by the second probe.
• Indicator lights (often red LEDs) next to 'OUT' labels illuminate when the respective relay output is active (e.g., heating or cooling is engaged).

6. Maintenance

6.1 Cleaning

• Wipe the controller's surface with a soft, dry cloth.
• Do not use abrasive cleaners or solvents, as they may damage the casing or display.
• Ensure no liquids enter the device.

6.2 Probe Care

Image 6.1: Close-up of a single temperature probe, highlighting its metallic tip and insulated cable.

• Keep the temperature probe clean and free from debris that could affect its accuracy.
• Avoid bending or kinking the probe cable excessively.
• Ensure the probe is securely placed in the environment where temperature measurement is required.

7. Troubleshooting

This section addresses common issues you might encounter with the STC-3008 controller.

8. Specifications

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact Walfront customer service through the retailer where the product was purchased or visit the official Walfront website. Please have your product model (STC-3008) and purchase details ready when contacting support.