Mellif Cordless Transfer Pump MT-BL1840 Instruction Manual

1. Introduction

This manual provides essential instructions for the safe and efficient operation and maintenance of your Mellif Cordless Transfer Pump, model MT-BL1840. This portable, self-priming electric utility water pump is designed for various water transfer tasks, compatible with Makita 18V batteries (not included).

Image 1: Mellif Cordless Transfer Pump MT-BL1840, showing its compact design and integrated handle.

2. Safety Information

Always observe the following safety precautions to prevent injury or damage to the pump:

• Read all instructions before operating the pump.
• Ensure the pump is used only with compatible Makita 18V batteries.
• Do not pump flammable liquids, corrosive chemicals, or water containing large debris/sand. This pump is optimized for clean water.
• Avoid operating the pump dry for extended periods. The pump has built-in dry-run protection, but continuous dry operation can cause damage.
• Keep hands and loose clothing away from moving parts.
• Do not immerse the pump in water. The battery compartment is waterproof, but the pump itself is not designed for submersion.
• Ensure proper ventilation during operation.
• Disconnect the battery before performing any maintenance or cleaning.

Image 2: Visual warning indicating liquids not recommended for pumping, such as sand, gas/oil, salt water, or flammables.

3. Product Overview and Components

The Mellif Cordless Transfer Pump is designed for portability and ease of use. Key components include:

• Pump Body: Main housing containing the motor and impeller.
• Battery Compartment: Located at the top, designed to house a Makita 18V battery. Features a waterproof cover.
• Inlet/Outlet Ports: 1/2" NPT male to 3/4" NH standard fittings for hose connection.
• LED Flashlight: Integrated light with two brightness levels (100 lm / 200 lm).
• Power Switch: On/Off control for the pump.
• LED Light Switch: Control for the integrated flashlight.

Image 3: The Mellif pump with its battery compartment open, showing where a Makita 18V battery (not included) is inserted.

Image 4: Illustration of the pump's integrated LED light, demonstrating its two brightness settings: 100 lumens (Level I) and 200 lumens (Level II).

4. Specifications

Image 5: Diagram illustrating the pump's maximum head height of 60 feet, maximum flow rate of 430 GPH, and maximum lift height of 6 feet.

5. Setup

5.1 Battery Installation

1. Open the waterproof battery compartment cover located on top of the pump.
2. Insert a fully charged Makita 18V battery into the compartment, ensuring it clicks securely into place.
3. Close the battery compartment cover firmly to ensure a waterproof seal.

5.2 Hose Connection

1. Connect the inlet hose (suction side) to the appropriate port on the pump. Ensure the inlet hose length does not exceed 10 feet for optimal performance.
2. Connect the discharge hose (outlet side) to the other port.
3. Ensure all connections are tight to prevent leaks and maintain suction. The pump uses 1/2" NPT male to 3/4" NH standard fittings.

Image 6: The Mellif pump with both inlet and outlet hoses connected, demonstrating easy setup.

5.3 Priming

The Mellif transfer pump features a self-priming design, eliminating the need to manually add water before use. Simply ensure the inlet hose is submerged in the water source.

6. Operation

6.1 Starting the Pump

1. Place the pump on a stable, level surface.
2. Submerge the inlet hose end into the water source.
3. Ensure the discharge hose is directed to the desired drainage area.
4. Press the power switch to the "ON" position. The pump will begin to draw water.

6.2 Using the LED Light

The integrated LED flashlight can be activated independently using its dedicated switch. Toggle the switch to cycle between Level I (100 lm), Level II (200 lm), and OFF.

6.3 Operating Conditions

• Maximum Suction Lift: 6 feet.
• Maximum Head Height: 60 feet.
• Inlet Hose Length: For best performance, keep the inlet hose length under 10 feet.
• Water Temperature: Do not exceed 140°F (60°C).
• Air Temperature: Do not exceed 104°F (40°C).

Image 7: Diagram illustrating pump operation requirements, including recommended inlet hose length (within 10 feet) and height difference (within 13 feet). It also shows dry-run protection activation.

6.4 Applications

This pump is suitable for various clean water transfer tasks, including:

• Draining aquariums and water tanks.
• Emptying water beds, pools, and hot tubs.
• Removing water from flooded areas.
• Watering lawns or gardens from a water source.

Image 8: Collage showing various applications for the Mellif pump, such as draining pools, aquariums, watering gardens, and clearing flooded areas.

7. Maintenance

7.1 Cleaning

• After each use, flush the pump with clean water to remove any residue.
• Wipe the exterior of the pump with a damp cloth. Do not use harsh chemicals.
• Inspect the inlet strainer for debris and clean if necessary.

7.2 Storage

• Ensure the pump is completely dry before storing.
• Remove the battery from the pump if storing for an extended period.
• Store the pump in a cool, dry place, away from direct sunlight and extreme temperatures.

8. Troubleshooting

9. Warranty and Support

For warranty information or technical support, please contact Mellif customer service directly. Refer to the product packaging or the official Mellif website for contact details.

Note: This manual is for informational purposes only. The manufacturer reserves the right to make changes to the product and specifications without prior notice.