1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your LOKLNEYK SR208C Wi-Fi Split Solar Water Heater Controller. Please read this manual carefully before installation and use to ensure proper function and safety. The SR208C controller is designed to manage solar water heating systems efficiently, offering precise temperature control and various smart functions.
2. Product Overview
The LOKLNEYK SR208C Wi-Fi controller is an advanced device for managing split solar water heating systems. It features high-precision temperature measurement, support for multiple sensor types, and intelligent heating strategies. The Wi-Fi functionality allows for remote monitoring and control.
Figure 2.1: Front view of the LOKLNEYK SR208C Wi-Fi Solar Water Heater Controller. This image shows the display screen and control buttons.
Key Features:
- Compatible with various water heater types for flexible use.
- Simple installation with universal interface and multiple safety protections.
- Fully automatic water supply, with automatic shut-off when the tank is full to prevent overflow.
- Intelligent adjustment of heating strategy.
- Wi-Fi function for remote access and control.
3. Setup
Proper installation is crucial for the optimal performance of your SR208C controller. It is recommended that installation be performed by a qualified technician.
3.1 Mounting the Controller
Mount the controller in a dry, protected location, away from direct sunlight and extreme temperatures. Ensure adequate ventilation around the unit. The controller dimensions are 178 mm x 120 mm x 43 mm.
3.2 Electrical Connections
Connect the power supply to AC100-240V, 50-60Hz. Ensure all connections are secure and comply with local electrical codes.
3.3 Sensor Connections
The controller supports 3 sensors:
- 1x Pt1000 sensor (up to 500 °C) for the solar collector (silicone cable 280 °C).
- 2x NTC10K B3950 sensors (up to 135 °C) for the storage tank (PVC cable 105 °C).
Connect the sensors to their designated ports on the controller. Ensure correct polarity and secure connections.
3.4 Output Connections
The controller has 2 relay outputs for the circulation pump and auxiliary heating. Connect these devices according to the wiring diagram provided with the product packaging. The maximum current is 8A.
4. Operating Instructions
Once installed and powered on, the controller will display system information. Use the control buttons to navigate menus and adjust settings.
4.1 Main Functions:
- Post-heating/Thermostat AH: Manages auxiliary heating based on set temperature.
- Password Protection: Secures settings from unauthorized changes.
- Charge Tank Heating: Controls the heating process for the storage tank.
- Collector Emergency Stop (OCEM): Initiates an emergency shutdown for the collector.
- Collector Cooling (OCCO): Manages cooling of the solar collector.
- Collector Minimum Temperature (OCMI): Sets the minimum operating temperature for the collector.
- Antifreeze (OCFR): Activates antifreeze protection for the system.
- Tube Collector (OTCO): Specific settings for tube collectors.
- Pump Control Mode: Configures the operation mode of the circulation pump.
- System Cooling (OSYC): Manages overall system cooling.
- Tank Cooling (OSTC): Controls cooling for the storage tank.
- Manual Mode (MAN): Allows for manual control of system components.
- Blocking Protection (BLPR): Prevents pump blockage.
- Thermal Disinfection (OTDI): Initiates a thermal disinfection cycle for the tank.
- UNIT CF Switch: Unit conversion switch (e.g., Celsius/Fahrenheit).
- Memory Function: Retains settings during power outages.
- Screen Protection: Activates screen saver or dimming.
4.2 Wi-Fi Functionality
The SR208C Wi-Fi model allows connection to a local network for remote monitoring and control via a dedicated application. Refer to the separate Wi-Fi setup guide for detailed instructions on connecting your device to the network and using the mobile application.
5. Maintenance
The LOKLNEYK SR208C Wi-Fi controller requires minimal maintenance. Regular checks can help ensure its longevity and optimal performance.
- Cleaning: Gently wipe the controller's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Connections: Periodically inspect all electrical and sensor connections to ensure they are secure and free from corrosion.
- Software Updates: Check for any available firmware updates through the Wi-Fi application to ensure your controller has the latest features and bug fixes.
6. Troubleshooting
If you encounter issues with your SR208C Wi-Fi controller, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Controller not powering on | No power supply; loose connection | Check power cable and circuit breaker. Ensure AC100-240V supply. |
| Inaccurate temperature readings | Faulty sensor; loose sensor connection | Check sensor wiring. Replace sensor if damaged. |
| Buzzer fault warning | System error; sensor fault | Refer to the display error code for specific issue. Check sensor connections. |
| Pump not operating | No power to pump; pump blockage; controller setting | Check pump power and connections. Verify pump control mode settings. Check for BLPR (Blocking Protection) activation. |
| Wi-Fi connection issues | Incorrect network settings; router issues; signal interference | Ensure correct Wi-Fi password. Restart router. Check signal strength. Refer to Wi-Fi setup guide. |
If problems persist, contact customer support.
7. Specifications
Detailed technical specifications for the LOKLNEYK SR208C Wi-Fi controller:
| Parameter | Value |
|---|---|
| Controller Dimensions | 178 mm x 120 mm x 43 mm |
| Power Supply | AC100-240V, 50-60Hz |
| Power Consumption | < 2.5 W |
| Temperature Measurement Accuracy | ± 0.1 °C |
| Sensor Temperature Range (Collector) | -10 °C to 220 °C |
| Sensor Temperature Range (Tank) | 0 °C to 110 °C |
| Auxiliary Heating Power (HK) | 1 pc 500W |
| Inputs | 3 sensors (1x Pt1000, 2x NTC10K B3950) |
| Outputs | 2 relays (for circulation pump and auxiliary heating) |
| Ambient Temperature | -10 °C to 50 °C |
| Waterproof Rating | IP41 |
| Maximum Current | 8 A |
| Certification | CE |
| Material | Stainless Steel 18/10 (as per product specifications, likely for internal components or casing) |
| Weight | 50 g |
8. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. For technical support, troubleshooting assistance, or spare parts inquiries, please contact the LOKLNEYK customer service department or your authorized dealer. Keep your purchase receipt as proof of purchase for warranty claims.