1. Introduction
Thank you for choosing the Niiyen HT-781 Rechargeable Air Pump. This intelligent DC electric air pump is designed for efficient and convenient inflation of various items, including air cushions, inflatable beds, inflatable tents, Stand-Up Paddleboards (SUPs), and other inflatable products. Featuring a digital pressure LCD screen, it allows for precise pressure setting and monitoring. Please read this manual thoroughly before use to ensure safe and optimal performance.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the product:
- Do not operate the pump in wet conditions or immerse it in water.
- Keep out of reach of children.
- Ensure the correct voltage (12V DC) is used for power supply.
- Do not block the air intake or outlet during operation.
- Do not exceed the maximum pressure rating of the item being inflated. The pump has a maximum pressure of 16 PSI.
- This pump is designed for inflation only; it does not have an exhaust function.
- Avoid prolonged continuous operation to prevent overheating. Allow the pump to cool down if it becomes hot.
3. Package Contents
Verify that all items are present in your package:
- 1 x Niiyen HT-781 Rechargeable Air Pump (with Car Charging Plug)
- 1 x User Manual (this document)
- 1 x Hose (with 1 Nozzle attached)
- 5 x Additional Nozzles
Image: Niiyen HT-781 Air Pump with included hose and various nozzles.
4. Product Overview
The Niiyen HT-781 air pump is designed for ease of use and portability. It features a compact design with an integrated handle for convenient carrying and storage.
Image: Front view of the Niiyen HT-781 Air Pump with its 12V car power adapter.
Image: Various angles of the Niiyen HT-781 Air Pump, highlighting its compact form factor.
5. Setup
5.1 Connecting the Hose
- Locate the inflation outlet on the pump.
- Connect the end of the flexible conduit adaptor on the Nylon air hose to the pump's inflation outlet.
- Twist the adaptor clockwise to tighten it securely.
5.2 Power Connection
- Ensure your vehicle's 12V DC power outlet (cigarette lighter socket) is clean and free of debris.
- Insert the car charging plug of the pump firmly into the vehicle's 12V DC power outlet.
5.3 Attaching Nozzles
- Select the appropriate nozzle for the valve of the item you intend to inflate.
- Attach the selected nozzle to the free end of the air hose. Ensure it fits snugly to prevent air leakage.
Image: Detailed views of the pump's connections and digital display.
6. Operating Instructions
6.1 Powering On and Setting Pressure
- Once connected to power, the digital LCD screen will illuminate.
- Use the '+' and '-' buttons on the control panel to set your desired pressure (0-16 PSI). The current pressure value will be displayed on the screen.
- You can adjust the set pressure value even during the inflation process without stopping the pump.
6.2 Inflation Process
- Connect the nozzle to the valve of the item you wish to inflate.
- Press the power button to start the inflation. The pump will begin to inflate the item to the preset pressure.
- The pump will automatically stop once the preset pressure is reached.
- Disconnect the nozzle from the item and the hose from the pump.
Image: Niiyen HT-781 Air Pump inflating a paddle board on a beach.
7. Maintenance
7.1 Cleaning
- Wipe the exterior of the pump with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Ensure the air intake and outlet are free from dust and debris.
7.2 Storage
- Store the pump and its accessories in a cool, dry place, away from direct sunlight and extreme temperatures.
- Keep the hose and nozzles neatly coiled to prevent kinks or damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not turn on. | No power from vehicle's 12V outlet; Loose connection. | Check vehicle's power outlet for functionality; Ensure car charging plug is firmly inserted. |
| Pump runs but no air inflates. | Hose or nozzle not securely attached; Blocked air intake/outlet. | Ensure hose and nozzle are tightly connected; Check for obstructions in air pathways. |
| Inflation is slow or weak. | Low voltage from vehicle; Air leakage from connections. | Ensure vehicle engine is running for optimal power; Re-check all connections for tightness. |
| Pump stops before reaching preset pressure. | Overheating protection activated. | Allow pump to cool down for 15-20 minutes before resuming operation. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | HT-781 |
| Color | Black & Orange |
| Material | PVC |
| Voltage | 12V DC |
| Pressure Preset Range | 0-16 PSI (1psi = 0.069bar) |
| Air Flow | 70 L/min |
| Power Supply Type | Vehicle DC power supply |
| Dimensions (L x W x H) | Approx. 23 x 14 x 12 cm (9.1 x 5.5 x 4.7 in) |
| Wire Length | Approx. 300 cm (9.8 ft) |
| Soft Tube Length | Approx. 110 cm (20.9 in) |
| Weight | Approx. 1400 g |
Image: Dimensional diagram of the Niiyen HT-781 Air Pump.
10. Warranty and Support
Niiyen products are manufactured with quality and performance in mind. For any questions, technical support, or warranty claims, please refer to the contact information provided at the point of purchase or visit the official Niiyen website. Please retain your proof of purchase for warranty purposes.