1. Introduction
The LVSEDTAL ZL-7801A is a digital temperature and humidity controller designed for precise environmental management. This device integrates both temperature and humidity control functions, making it suitable for various applications requiring stable climate conditions. It features a clear digital display and user-friendly operation buttons for easy configuration and monitoring.
2. Product Features
- Dual Control: Manages both temperature and humidity simultaneously.
- Temperature Calibration: Allows for accurate temperature adjustments.
- Cooling Control Delay Protection: Protects cooling equipment from rapid cycling.
- Wide Application: Suitable for use with large power equipment.
- Compact Design: Small size and light weight for easy integration.
- Clear Display: Large and clear LCD for easy readability.
- Reliable Performance: Stable and dependable operation with a long service life.
- Easy Assembly: Uniquely shaped for straightforward installation.
3. Product Overview
Figure 3.1: Front view of the ZL-7801A controller with its sensor and labeled components. The image highlights the sensor, digital display, operation buttons (P, Up, S, Down), and button snap. The sensor cable length is approximately 2 meters.
Figure 3.2: Top view showing the ZL-7801A controller with its connected temperature and humidity sensor, and a bottom view revealing the wiring terminals for power input and output loads.
4. Specifications
Figure 4.1: Detailed product parameters for the ZL-7801A controller, including power supply, input, output load, setting range, resolution, measurement accuracy, working environment, and drilling size.
| Parameter | Value |
|---|---|
| Power Supply | 100-240V AC, 50/60Hz |
| Input | One humidity and temperature sensor (wire length: 2.0 meters) |
| Output Load | R1 load: 5A/250Vac R4 and R5 loads: 3A/250Vac R2 and R3 loads: 16A/250Vac |
| Humidity Setting Range | 5% - 95% RH |
| Temperature Setting Range | -20°C to 60°C |
| Humidity Resolution | 0.1% |
| Temperature Resolution | 0.1°C |
| Humidity Measurement Accuracy | ±3% |
| Temperature Measurement Accuracy | ±1°C |
| Working Environment | Humidity: 10-90% RH (no condensation) Temperature: -20°C to 45°C |
| Device Dimensions | 78 x 35 x 71mm (3.1 x 1.4 x 2.8in) |
| Drilling Size | 71 x 29mm (2.8 x 1.1in) |
| Package Weight | 230g (8.1oz) |
5. Setup and Installation
Before installation, ensure the power supply is disconnected to prevent electrical shock. The ZL-7801A is designed for panel mounting.
- Panel Preparation: Cut a rectangular opening in your control panel with dimensions of 71mm x 29mm (2.8 x 1.1 inches).
- Insert Controller: Carefully insert the ZL-7801A controller into the prepared opening.
- Secure Controller: Use the provided button snaps or mounting clips to secure the controller firmly in place.
- Wiring: Refer to the wiring diagram (typically found on the device casing or in a separate diagram) for correct connections. Connect the power supply (100-240V AC, 50/60Hz) to the designated terminals. Connect your heating, cooling, and humidity control loads to the respective output terminals (R1, R2, R3, R4, R5).
- Sensor Connection: Connect the temperature and humidity sensor to its dedicated input terminal. Ensure the sensor is placed in the environment where temperature and humidity are to be measured, avoiding direct sunlight or airflow that could affect readings.
- Ensure all connections are secure and insulated.
- Verify that the voltage and current ratings of your loads do not exceed the controller's output specifications.
6. Operating Instructions
The ZL-7801A features a digital display and four operation buttons: 'P' (Program/Set), 'Up Arrow', 'S' (Set/Confirm), and 'Down Arrow'.
6.1 Power On/Off
- To power on, connect the device to a 100-240V AC power source. The display will illuminate.
- To power off, disconnect the device from the power source.
6.2 Viewing Current Readings
Upon power-up, the display will typically show the current temperature and humidity readings from the connected sensor.
6.3 Setting Parameters
To enter the parameter setting mode:
- Press and hold the 'S' button for a few seconds until a parameter code appears on the display.
- Use the 'Up Arrow' and 'Down Arrow' buttons to navigate through the different parameter codes (e.g., F1, F2, H1, H2).
- Once the desired parameter code is displayed, press the 'S' button again to view its current value.
- Use the 'Up Arrow' and 'Down Arrow' buttons to adjust the value.
- Press the 'S' button to confirm the new value and save the setting.
- To exit the setting mode, press the 'P' button, or wait for a timeout.
6.4 Common Parameters (Example)
While specific parameter codes may vary, common settings include:
- Set Temperature (ST): The target temperature for control.
- Set Humidity (SH): The target humidity for control.
- Temperature Hysteresis (dF): The difference between the set temperature and the temperature at which the heating/cooling output turns off.
- Humidity Hysteresis (dH): The difference between the set humidity and the humidity at which the humidifying/dehumidifying output turns off.
- Temperature Calibration (CA): Adjusts the temperature reading to match a known accurate thermometer.
- Cooling Delay Protection (PT): Sets a delay time before the cooling output activates again, protecting the compressor.
Refer to the detailed parameter list provided with your specific unit for a complete guide to all adjustable settings.
7. Maintenance
Regular maintenance ensures the longevity and accuracy of your ZL-7801A controller.
- Cleaning: Periodically wipe the device and display with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Sensor Care: Keep the temperature and humidity sensor clean and free from dust or debris. Avoid exposing the sensor to extreme moisture or physical damage.
- Connection Check: Annually inspect all wiring connections to ensure they are secure and free from corrosion.
- Environmental Conditions: Ensure the controller operates within its specified working environment temperature and humidity ranges to prevent damage.
8. Troubleshooting
If you encounter issues with your ZL-7801A controller, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power supply or incorrect wiring. | Check power connections and ensure the device is receiving 100-240V AC. Verify wiring according to the diagram. |
| Incorrect temperature/humidity reading | Sensor fault, sensor placement issue, or calibration needed. | Check sensor connection. Ensure sensor is not exposed to direct heat/cold sources or excessive moisture. Perform temperature calibration if necessary. Replace sensor if faulty. |
| Outputs not activating | Settings incorrect, load wiring issue, or delay protection active. | Verify set temperature/humidity and hysteresis settings. Check wiring to the load devices. Wait for any active delay protection to expire. Ensure load devices are functional. |
| Buttons unresponsive | Temporary software glitch or physical button damage. | Try power cycling the device. If the issue persists, contact customer support. |
| Error code displayed | Specific internal fault or sensor issue. | Consult the specific error code list in the full product manual (if available) or contact customer support with the error code. |
If the problem persists after attempting these solutions, please contact customer support for further assistance.
9. Warranty and Support
This product is typically covered by a manufacturer's warranty against defects in materials and workmanship. The duration and terms of the warranty may vary. Please retain your proof of purchase for warranty claims.
For technical support, troubleshooting assistance beyond this manual, or warranty inquiries, please contact the retailer or manufacturer directly. Contact information can usually be found on the product packaging or the seller's website.