OSWNKW Central Prefilter System Backwash Water Filter Replacement User Manual

1. Product Introduction

The OSWNKW Central Water Purification Prefilter is designed to intercept pollutants such as particulate impurities, sediment, rust, and floating objects in water. It provides a protective role for downstream pipelines and water-related equipment like water purifiers, water heaters, wall-mounted stoves, washing machines, and showers.

Product Features:

• Free from disassembly and cleaning, eliminating the hassle of disassembling and replacing filter elements.
• Features PRE9.0 hydrodynamic turbine rotation self-cleaning function.
• Includes a regular pollutant discharge month memory function.
• Scrubbing during water flow enhances the prevention of filter element fouling.
• Constructed with a polymer plastic shell, environmentally friendly, pressure resistant, and antioxidant.
• Aerospace engineering mixed polymer PC filter cup, designed to be explosion-proof and anti-freezing crack.
• New flat woven filter screen for more precise filtration.

2. Specifications

Technical Parameters:

Product Dimensions:

(Note: The overall prefilter unit dimensions are shown in the full instruction diagram.)

3. Installation

Product Component Names:

• High precision water pressure gauge
• Live interface
• Polymer protective shell (upper)
• Aerospace PC filter cup (Explosion proof, anti-freeze and crack resistant)
• PRE9.0 Turbine Rotating Self Cleaning Filter Element
• Protective shell (lower)
• Blowdown handle switch (关=Off, 开=On)
• Splash discharge outlet

Installation Steps:

1. Close the valve of the incoming pipeline, empty the residual tap water in the pipeline, and ensure that the copper valve head is tightened with the filter bottle.
2. Wrap a few circles of raw material tape (PTFE tape) around the outer threads of two randomly configured adapters.
3. Align the filter and connect it to the pipeline, ensuring the white gasket in the union nut is not missed.
4. Tighten the union nuts on both ends of the copper valve head.

Important Installation Notes:

• Installation, debugging, and maintenance must be carried out by professional personnel.
• This product series can only be installed indoors in a dry environment, avoiding proximity to heat sources.
• This product series is only suitable for 0-40°C municipal tap water; do not use it on wastewater or corrosive liquids.
• When installing, please pay attention to whether the water flow direction marked on the valve body is consistent with the pipeline flow direction.
• The installation position must ensure a reliable drainage system.
• After installation, the filter bottle components must be kept vertical.

4. Operation

Instructions for Using Pressure Gauges:

• The product water pressure gauge adopts MPa units (1MPa ≈ 10 kg/cm²).
• This product has no pressure regulation function and can only monitor the water pressure during use.

Operating Instructions for Self-Cleaning and Blowdown:

• This product adopts a PRE9.0 hydrodynamic turbine rotating self-cleaning filter element, which automatically rotates and scrapes the filter element as long as the water pressure is above 0.1MPa.
• The highlighted handle is a self-cleaning sewage switch. Rotating in the direction indicated by the "ON" arrow opens the sewage, while rotating in the direction indicated by the "OFF" arrow closes it.
• When opening the drain, the filter scraper will start to rotate and scrape the filter. It is recommended to drain for 15 to 30 seconds each time.
• Attention: Personnel should not leave when discharging to prevent forgetting to turn off the discharge switch and causing unnecessary losses.
• It is recommended to discharge the water at least once a month. For water quality deviations, it is recommended to discharge the water more than 2 times per month.

5. Maintenance

Regular maintenance ensures the longevity and optimal performance of your OSWNKW Central Prefilter System.

• Regular Blowdown: Perform a self-cleaning blowdown for 15-30 seconds at least once a month. For areas with poorer water quality, increase the frequency to more than twice a month.
• Filter Element Replacement: The replacement frequency for the filter element is typically once every 1-3 years, depending on local municipal water quality and product usage environment.
• General Care: During normal cleaning and maintenance, pay attention to protecting all components.
• Environment: Ensure the unit remains installed indoors in a dry environment, away from heat sources.
• Water Quality: Only use with municipal tap water or deep well water within the specified temperature range (0-40°C). Avoid wastewater or corrosive liquids.

6. Troubleshooting

Refer to the table below for common issues and their solutions.

7. User Tips

No specific user tips or frequently asked questions were available from provided reviews or Q&A content. Always follow the manufacturer's instructions for optimal performance and safety.

8. Warranty and Support

Our company provides complete and reliable products. Without our company's approval, we are not responsible for any machine damage, personal injury, property, environmental losses, etc., caused by unauthorized replacement, installation, or setup of debugging parts for this product. If you have any questions about this product, please contact us immediately.

For a detailed user manual and additional guides, you can refer to the official PDF document: View User Manual (PDF).