Mizudo Megaflo Mini Reverse Osmosis Water Filtration System

1 Explanation of Symbols and Safety Instructions

This manual contains safety information and instructions to help reduce the risk of accidents and injuries.

1.1 Recognize Safety Information

! Safety Alert Symbol: Used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

1.2 Understand Signal Words

Signal words identify safety messages and property damage messages, indicating the degree of hazard seriousness.

• DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
• WARNING: Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
• CAUTION: Indicates a hazardous situation which, if not avoided, could result in property damage and minor or moderate injury.
• NOTICE: Indicates important information where there is no risk to people or property.

1.3 Installation Tips

Please read this manual and the labels on the water filter before installation, operation, or service. Check the packing list to confirm all accessories are included. Contact Mizudo customer service if any components are missing or damaged. Do not proceed with installation if parts are cracked or broken.

NOTICE: Before installing, ensure your water supply complies with operating specifications. Failure to do so may reduce effectiveness and void the warranty.

How to use the quick-connector fitting:

• To connect: Push the PE tubing into the fitting until the mark for full insert is reached. Push the clip onto the fitting to lock the tubing.
• NOTICE: If the PE tubing is not fully inserted, no seal will be created, and leakage will occur.
• To disconnect: Press the lock sleeve with your thumb and index finger, and pull out the PE tubing. Remove the blue lock clip first.
• NOTICE: Do not pull out the PE tubing directly, as this will damage the fitting and cause leakage.

2 General Information

2.1 Product Specification

Hardness: Recommended hardness not to exceed 10 grains per gallon, or 170 parts per million. Note: System will operate with hardness over 10 grains but the membrane life may be shortened. The addition of a water softener may lengthen the membrane life.

Water Pressure: The operating water pressure in your home should be tested over a 24 hour period to attain the maximum pressure. If the incoming water pressure is above 80 psi then a water pressure regulator is required.

2.2 Product Overview and Installation Illustration

Product Overview:

• 1. RO system
• 2. Faucet
• 3. 3/8" White PE tubing
• 4. 1/4" White PE tubing
• 5. 1/4" Red PE tubing
• 6. Angle stop valve
• 7. Power adapter
• 8. Drain connector
• 9. 1/4" Clips
• 10. 3/8" Clips

Installation Illustration:

• 1. Hot water valve
• 2. Cold water valve
• 3. Angle stop valve
• 4. Drain connector
• 5. Water inlet tubing
• 6. Drain outlet tubing
• 7. Reverse osmosis system
• 8. Faucet power cord
• 9. Filtered water outlet tubing
• 10. Faucet
• 11. Power adapter

3 Installation

3.1 Installation Instructions

Read all installation and operating instructions before installing and using your RO system.

NOTICE: Check for sufficient space for the system and accessories. Do not install the system outdoors. Ensure the installation environment adheres to hygiene and sanitation conditions. Avoid external dripping liquids onto the system. Place the system on a stable surface, away from heat and flammable gas leakage areas.

Tools and Materials Required: Hand or electric drill, adjustable wrenches, screwdrivers, utility knife or scissors, safety glasses, drill bits (1" for faucet hole, 1/4" for drain tubing), safety mask.

3.2 Selecting The Faucet Location

Most sinks have pre-drilled holes for spray hoses. The RO faucet can use these holes. If pre-drilled holes are inconvenient, drill a 1" hole in the sink or countertop next to the sink.

CAUTION: This procedure may generate dust. Wear safety glasses and a safety mask. Do not drill through all-porcelain or porcelain-coated sinks. For these sinks, use the sprayer hole or drill through the countertop. When drilling countertops, ensure the area below is free of wiring and piping. Do not drill through countertops thicker than 1 inch. Do not drill through tiled, marble, or granite countertops; consult a plumber or manufacturer.

Instructions for stainless steel sinks ONLY:

• Line the bottom of the sink with newspaper.
• Place masking tape over the area to be drilled.
• Mark the point with a center punch. Drill a 1/4-inch pilot hole.
• Use a 1" hole saw to enlarge the hole. Smooth rough edges with a file.

3.3 Install The Angle Stop Valve for The Feed Water

(Fits 1/2" - 14 NPS supply threads or 3/8" compression).

• (A) Turn off the cold water supply valve. Turn on the kitchen faucet to release pressure. Disconnect the cold water hose from the cold water valve.
• (B) Insert the 3/8" white PE tubing into the angle stop adapter's fitting. Secure with a 3/8" clip.
• (C) Install the Angle Stop Valve on the cold water valve and tighten with an adjustable wrench. Ensure the gasket is in place.
• NOTICE: If the cold water tubing is 1/2", screw the conversion adaptor onto the Angle Stop Valve.
• (D) Turn on the cold water supply valve. Check connections for leakage with a tissue.

3.4 Install The Faucet

• NOTICE: If your kitchen sink or countertop does not have an existing hole, you will have to drill one (1"). Refer to chapter 3.2.
• 1. Insert the faucet into the hole on the countertop.
• 2. Under the sink, slip on the nut and tighten it up (Do not forget the washer).

3.5 Install RO Drain Connector

1. Identify drain outlet location.
2. Knock out the center hole on the foam seal (④).
3. Use the hole in the foam seal (④) as a template to locate your drilling position above the drain tap. Mark with a pencil. Note: For double sinks or horizontal drain tubing, mark the drill location on the top of the horizontal drain tubing.
4. Drill a 1/4" hole through the wall of the drain tubing, ensuring not to penetrate the opposite side.
5. Remove the protective cover from the foam seal (④) and attach it to the front plate of the drain connector (①) in alignment with the holes.
6. Position the drain connector (1) on the sink drain tubing with Screws (②) and Nuts (③), using a pencil in the drain connector tube hole to guide your location over the drilled hole. Securely tighten Nuts (③) and Screws (②).
7. NOTICE: Remove the pencil once the location is established.

3.6 Connecting The System

1. Before connecting PE tubing, ensure the plug from the water port is removed.
2. Connecting the tubing to the System:
• a. Connect the 3/8" White Tubing from the Angle stop valve to the "Raw Water" port.
• b. Connect the 1/4" White Tubing from the Faucet to the "Pure Water" port.
• c. Insert 1/4" Red Tubing from the Drain connector to the "Drain Water" port.
3. Insert the faucet power cord, connected to the faucet, into the "FAUCET" connector at the back of the housing and tighten the nut.
4. NOTICE: DO NOT insert the plug into the socket yet.

4 Operation

4.1 Before The First-time Use

• (A) Turn on the cold water supply and ensure the supply adapter valve is open.
• (B) Connect the system with power. You will hear a beep, and indicators will light up for 3s. The system will automatically flush for 30s. Wipe all joints and connections with tissue to check for leakage.
• (C) After auto-flush, turn on the faucet to run water for 30 minutes to flush air and carbon fines. The system is then ready for use.
• NOTICE: Initially, water may appear cloudy due to trapped air in the RO filter. This is not harmful and will disappear in minutes. It may take up to a week for trapped air to dissipate after installing a new RO filter.

4.2 User Interface

Indicator Lights:

• PCF lifetime indicator & Reset button: Solid blue light (Lifetime > 5%), Flashing red light (0 < Lifetime ≤ 5%), Solid red light (Lifetime = 0).
• RO lifetime indicator & Reset button: Solid blue light (Lifetime > 5%), Flashing red light (0 < Lifetime ≤ 5%), Solid red light (Lifetime = 0).
• Wi-Fi indicator: Solid blue light (Wi-Fi Connected), Flashing blue light (Wi-Fi Connecting), Off (Wi-Fi Disconnected).

Wi-Fi Button: Press and hold for 5 seconds until a beep. The indicator will flash blue. It turns solid blue upon successful connection. If connection fails, it turns off after 3 minutes.

PCF RO Reset Button: Press and hold the reset button for 3 seconds until a beep. The indicator will flash blue, confirming the filter lifespan has been reset.

RO Faucet Indicator:

• Solid blue light: Good water quality
• Flashing blue light: System flushing
• Flashing red light: High TDS detected in purified water
• Solid red light: System malfunction

5 Maintenance

If not using the system for one week or longer, remove and seal the filter. Store in the fridge. To restart, flush for at least 10 minutes or change filters. If not using for two weeks or longer, disconnect water supply, drain the system, and disconnect power.

Follow the recommended filter replacement schedule. Replace filters when the indicator is on. Actual filter life depends on family size and water source quality. Failure to replace filters can damage the system and cause health hazards.

5.1 Filter Cartridge Replacement

NOTICE: Filter life depends on water volume and feed water quality. For best performance, change filters according to the indicator or the suggested replacement cycle. If there's a noticeable change in taste, odor, or flow, change filters.

Filter Service Life Table:

The actual lifetime depends on local tap water quality and daily usage. The recommended cycle is an average. If local tap water quality is below the average, the actual lifetime may differ.

Filter cartridge replacement steps:

• a. Turn off power and water supply.
• b. Twist the filter anticlockwise and pull it out (Figure 1).
• c. Remove the packaging of the new filter and insert it. Twist clockwise to align the triangle icon with the lock icon (Figure 2).
• d. Turn on water supply and reconnect power. If RO filter replaced, run faucet for 30 minutes. If PCF filter replaced, run faucet for 10 minutes.
• e. Reset filter lifetime: Press and hold the reset button for 3 seconds. The indicator will flash a constant blue light.

5.2 Automatic Flushing

The faucet indicator flashes blue light during flushing. The system flushes automatically in the following situations:

• 1. Flush for Power Restore: When power is restored after a blackout, the system flushes automatically for 30 seconds.
• 2. Flush for Accumulative Time per 24 hours: To maintain filter life, the system flushes automatically for 30 seconds every 24 hours.

Flush mode does not affect water dispensing. If water is taken during flushing, the system will quit flushing and dispense water.

6 Troubleshooting