8820 8L Centrifugal Nozzle User Manual

1. Introduction

The jongkhurun 8820 8L Centrifugal Nozzle is a high-performance atomizing nozzle designed for agricultural spray drones. It features a micro electrostatic high-speed double nest disk for efficient and precise spraying. This manual provides essential information for the proper setup, operation, and maintenance of your centrifugal nozzle.

Figure 1: Two 8820 Centrifugal Nozzles

2. Specifications

3. Package Contents

Please check the package contents upon receipt to ensure all items are present:

• 8820 Centrifugal Nozzle Unit(s)
• Connection Cable(s)
• Mounting Plate(s)
• Mounting Hardware (screws, washers)

Figure 2: Nozzle Kit Components

4. Setup and Installation

1. Mounting: Secure the centrifugal nozzle to your drone's frame using the provided mounting plate and hardware. Ensure the nozzle is firmly attached and oriented correctly for optimal spray coverage.
2. Pipe Connection: Connect the liquid supply pipe to the 8MM inlet/outlet of the nozzle. Ensure a tight and leak-free connection.
3. Electrical Connection: Connect the provided 1.25m cable to the nozzle's fast plug. Then, connect the other end of the cable to your drone's power and control system. Ensure the power supply matches the nozzle's voltage range (16S-18S).

Figure 3: Nozzle Mounting Area

5. Operation Guidelines

Important Safety Precautions:

• Do NOT run the nozzle dry (idling). The nozzle motor relies on liquid flow for cooling. Always ensure the pump is active and liquid is flowing through the nozzle when it is rotating.
• Ensure the nozzle is turned off immediately when the liquid tank is empty to prevent damage. Some flight controllers may require manual intervention if they lack a specific centrifugal nozzle mode.

Operating Parameters:

• Control Mode: PWM, offering stepless speed regulation.
• 16S Power Supply: Set nozzle speed to 95% (analog range 1000-1950).
• 18S Power Supply: Set nozzle speed to 85% (analog range 1000-1850).
• Spray Performance: Expect an atomizing micron range of 50-100 microns and a spray height of 6-8 meters, depending on drone configuration and flight parameters.

6. Maintenance and Cleaning

Proper maintenance is crucial for the longevity and performance of your centrifugal nozzle:

1. Post-Operation Cleaning: After each spraying job, fill the drone's tank with clean water and a suitable cleaning liquid. Activate the centrifugal nozzle and spray this mixture for approximately 30 seconds. This process cleans residual pesticides, preventing corrosion, solidification, and damage to the motor bearings.
2. Storage: Store the nozzle in a clean, dry environment away from direct sunlight and extreme temperatures.
3. Inspection: Regularly inspect the nozzle for any signs of wear, damage, or blockages. Ensure the liquid inlet/outlet is clear.

Figure 4: Nozzle Atomizing Disk

7. Troubleshooting

• Nozzle Not Spinning: Check electrical connections, ensure proper voltage supply (16S-18S), and verify PWM signal from the flight controller.
• Poor Atomization: Ensure adequate liquid flow from the pump. Check for blockages in the liquid line or the nozzle itself. Verify the nozzle speed settings are correct for your power supply.
• Overheating: Confirm that liquid is consistently flowing through the nozzle when it is operating. Running dry will cause overheating and damage.
• Leakage: Inspect all pipe connections for tightness. Replace any damaged O-rings or seals.

8. User Tips

• Always perform a pre-flight check of the nozzle's functionality and liquid flow before commencing spraying operations.
• Consider the drone's flight height and speed in conjunction with the nozzle's spray height to achieve desired coverage and atomization.
• Regularly monitor the liquid level in the tank to avoid dry running the nozzle.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.