1. Overview
Thank you for purchasing the YOFIDRA Electric Sprayer. This manual provides essential information for the proper operation and maintenance of your sprayer. The YOFIDRA 12L/14L/16L/18L/20L/25L knapsack electric sprayer is designed for labor-saving and high-efficiency spraying. It integrates European design with Chinese culture, featuring safety, efficiency, novel design, and a unique appearance. It is suitable for pest control of crops, flowers, gardens, cleaning of public places, and sanitation/epidemic control of livestock and poultry houses. This new generation sprayer is a significant upgrade from traditional models, powered by an 18V-21V battery. It is significantly labor-saving, achieving 3 to 4 times higher efficiency than manual sprayers. It can operate continuously for up to 9 hours and spray 400-480 kg of liquid after a full charge, consuming only 0.3 kWh of electricity, and provides excellent atomization results.
2. Product Features
- Battery-Powered Operation: No manual pumping required. Uses a durable lithium-ion battery for direct spraying with a single charge.
- High Performance Pump: Equipped with a mini diaphragm pump, offering compact size, light weight, high pressure (Max 80 PSI), and extended service life. Features a pressure protection switch for automatic pressure-limit protection.
- Adjustable Pressure: Easily adjust water pressure from 0 to 80 PSI via a knob.
- Multiple Nozzles: Comes with 5 different nozzles to choose various spray methods.
- Adjustable Spray Bar: The metal rod length can be adjusted from 75cm to 120cm (29.53 inches to 47.24 inches) for versatile reach.
- Comfortable Design: Features a sleek back design, widened shoulder straps, and increased padding on the back for maximum comfort and portability during extended use.
- User-Friendly Inlet: An enlarged inlet with a filter allows for easy liquid addition and prevents clogging.
- Triple Filter Protection: Three screens protect against foreign matter or particles clogging the nozzle. The screen is uniquely structured for easy dismantling and cleaning.
- Under-Voltage Alert: An alert circuit sounds when the battery voltage drops to 10.5V during prolonged operation, protecting the battery.
- Intelligent Charger: The supplied charger features intelligent three-section charging (constant current/constant voltage/maintenance) and protection against short-circuit, over-current, and inverse-connection. Indicator lamps show charging status (Red: Charging; Green: Charged/Stand-by).
- Stirring Function: Integrated stirring function ensures consistent mixing of liquids within the tank.
3. Specifications
| Attribute | Value |
|---|---|
| Name | Electric Sprayer |
| Type | Knapsack |
| Voltage | 18V-21V |
| Flow Rate | 4L/min |
| Pressure | 5.5bar / 80psi |
| Capacity | 20L |
| Mixing Time | 3s |
| Net Weight | 6.5KG |
| Dimensions (L×W×H) | 40×190×555mm |
| Pump Type | Mini Diaphragm Pump |
4. Setup and Installation
- Charge Battery: Ensure the battery is sufficiently charged prior to operation. The battery has been charged before delivery, but additional charging may be required due to self-discharge during transportation and storage.
- Fill Tank: Fill the barrel with the prepared liquid through the screen.
- Secure Cover: Close the barrel cover tightly.
- Check for Leaks: Observe to check whether any leakage occurs at the bottom of the barrel.
- Connect Components: Attach the hose, spray bar, and desired nozzle.
- Attach Straps: Adjust and attach the shoulder straps for comfortable carrying.
5. Operating Instructions
- Power On: Turn on the main power switch.
- Start Spraying: Clench the switch handle to start spraying. The sprayer supports both instant and continuous spraying. For continuous spraying, lock the trigger into the normally open mode.
- Adjust Pressure: Use the pressure adjustment knob to set the desired spray pressure. Turning the red switch directly to maximum sets the pressure to maximum (the knob is ineffective at this time). Rotating the knob clockwise sets the pressure from minimum to maximum.
- Utilize Stirring Function: The sprayer has an internal stirring function to ensure consistent mixing of liquids.
- Nozzle Selection: Three types of nozzles are supplied to cater to your demands:
- Sectorial Mist Nozzle: Sprays uniform mist, suitable for short crops and weedicide application. Follow the wind and move in a parallel manner on one side while spraying.
- Conical Mist Nozzle: Suitable for pest control. Follow the wind and move in a cross manner on one side while spraying.
- Four-Hole Adjustable Nozzle: Suitable for spraying high crops and fruit trees. Note: This may result in significant pesticide loss.
6. Maintenance and Safety Notes
6.1. General Maintenance
- Cleaning After Use: The unit must be cleaned thoroughly after each use to avoid corrosion, clogging, and mixing of residual liquid with the next spraying liquid, which could harm crops or reduce effectiveness.
- Exterior Cleaning: Scrub the exterior with a dampened cloth.
- Interior Cleaning: Fill the tank with a small amount of clean water, shake it, then turn on the power to discharge the water.
- Long-Term Storage: For long-term storage, regular full discharging and recharging at intervals of half a month to two months are required to ensure battery service life.
- Screw Check: After six months of use, dismantle the base and check if the screws are loose. Tighten them if necessary.
- Filter Screen: The sprayer is equipped with a double filter screen to prevent foreign objects from clogging the nozzle.
6.2. Safety Notes
- Never operate with strong acid, strong base, or flammable liquids.
- Do not use high-persistent and very toxic pesticides for pest control on vegetables, fruit trees, tea, or medical plants.
- Try your best to avoid operating the sprayer without water, as this may damage the diaphragm.
- Never place the sprayer upside down, as the battery may be damaged.
- For charging, a duration of at least 8 hours is required. The charger should be placed in a dry, well-ventilated, safe place over 50 cm high above the ground.
- Trial spraying with clean water is necessary for initial use to ensure no leakage or poor atomization occurs.
- Always wear a mask and gloves when spraying.
- Never spray pesticides against the wind, at humans, animals, or food.
- Avoid operating for a long time under high temperatures.
- Do not drink alcohol immediately after spraying. Strict compliance with safety instructions of the pesticide manufacturer is required when handling pesticides.
- Be sure to switch off the power before storage.
- It is strictly prohibited to keep this sprayer near fire or expose the base to water or immerse the machine in water for cleaning or filling.
- Never spray powders or particles with this sprayer.
- Unauthorized removal of the charger's housing is prohibited.
- Do not operate this sprayer in temperatures exceeding 45°C or lower than -10°C.
7. Troubleshooting
| Problem | Causes | Solutions |
|---|---|---|
| The motor fails to start after being powered on. |
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| Abnormal sound heard in the motor. |
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| Leakage occurs at the bottom of the base. |
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| Poor atomization. |
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8. Packing List
The following items are included in the standard package. Please check against this list upon receipt.
| S/N | Description | Qty. (pcs) | Remarks |
|---|---|---|---|
| 1 | Main unit of Sprayer | 1 | |
| 2 | Manual | 1 | |
| 3 | Gasket ring | 1 | |
| 4 | Conical mist spraying nozzle | 1 | Additional parts including expansion link, multi-purpose sprayer head are available for optional purchase. |
| 5 | Four-hole adjustable nozzle | 1 | |
| 6 | Sectorial mist nozzle | 1 | |
| 7 | 30° dual nozzle | 1 | |
| 8 | Cover for opening | 2 | |
| 9 | Mask | 1 | |
| 10 | Certificate of Compliance | 1 | |
| 11 | Warranty Card | 1 |
Note: The package contents may vary based on the selected pattern (e.g., with or without batteries and charger). Please refer to your specific purchase for exact inclusions.
- Pattern 1: (No Battery) 1X 20L sprayer, 1X Copper nozzle spray bar, 1X Filter, 1X Hose, 2X Strap, 5X Nozzle, 4X Accessories.
- Pattern 2: (2X1.5Ah Battery) 1X 20L sprayer, 1X Copper nozzle spray bar, 1X Filter, 1X Hose, 2X Strap, 5X Nozzle, 4X Accessories, 2 X 1.5Ah Battery, 1 X Charger.
- Pattern 3: (1X3.0Ah Battery) 1X 20L sprayer, 1X Copper nozzle spray bar, 1X Filter, 1X Hose, 2X Strap, 5X Nozzle, 4X Accessories, 1 X 3.0Ah Battery, 1 X Charger.
- Pattern 4: (2X3.0Ah Battery) 1X 20L sprayer, 1X Copper nozzle spray bar, 1X Filter, 1X Hose, 2X Strap, 5X Nozzle, 4X Accessories, 2 X 3.0Ah Battery, 1 X Charger.
9. Warranty and Support
YOFIDRA provides the following protection plans for your product:
- Tool Protection Plan: One year warranty for the main sprayer unit.
- Battery Protection Plan: Half year warranty for the battery.
For detailed information and technical support, please refer to the official documentation.
An official user manual in PDF format is available for download: YOFIDRA Electric Sprayer User Manual (PDF)
10. User Tips
No specific user tips were available from reviews or Q&A at this time. Always follow the instructions in this manual for optimal performance and safety.
