Metabo Professional Power Tool Solutions

Water Pumps: P 2000 G, P 3300 G, P 4000 G, P 9000 G, HWW 3300/25 G, HWW 4000/25 G, HWW 9000/100 G

Product Overview

This document provides operating instructions for various Metabo water pumps and domestic water supply units. It details safety precautions, intended use, installation, operation, maintenance, and troubleshooting for models including:

P 2000 G
P 3300 G
P 4000 G
P 9000 G
HWW 3300/25 G
HWW 4000/25 G
HWW 9000/100 G

The manual is available in multiple languages, indicated by the following codes: de, en, fr, nl, pl, it, el, es, pt, sv, fi, no, da, ru.

Safety Instructions

General Safety: Always prioritize your safety and the protection of the unit. Observe all warnings marked with the symbol i. Failure to comply with safety instructions can lead to electric shock, fire, and severe injuries. Keep all instructions and safety information for future reference. When transferring the pump, ensure these documents are included.

Hazard Warnings:

Danger! Indicates a risk of injury or environmental damage.
Danger of electric shock! Warning of injury when working with electrical equipment.
Caution! Indicates potential material damage.

Specific Safety for Water Pumps:

Children are not permitted to use the pump and must be supervised to ensure they do not play with it.
Do not operate the pump if people are in the water.
Hot water can cause damage or leaks, posing a burn hazard.
For pumps designated HWW..., if the pressure switch settings are incorrect or faulty, internal water circulation can cause overheating.
For pumps designated P..., continuous operation with a closed discharge line must not exceed 5 minutes due to water overheating.
If a malfunction occurs, disconnect the pump from the power supply and allow it to cool. Have the unit inspected by a specialist before re-use.
Never direct the water jet at the pump or other electrical components.
Do not perform installation or maintenance work on a connected pump.
Never touch the power plug with wet hands. Always pull the plug, not the cable.
Protect the power cable from damage, kinks, oil, and high temperatures.
Ensure electrical components are not exposed to water.
Use only properly installed and grounded outlets.
Ensure the power supply voltage, frequency, and fuse match the specifications.
Use a residual current device (RCD) with a maximum tripping current of 30 mA.
Electrical connections must be protected from water.
Extension cords must have adequate cross-section and be fully unwound.
Comply with national installation regulations.
Never operate the pump without water; ensure a constant supply of water.
The pump has a thermal overload protector that switches off the motor in case of blockage or overheating. The pump will restart automatically after cooling.
Do not operate the pump in explosive atmospheres or near flammable liquids or gases.
Install a check valve on the suction port to prevent backflow of water.

Intended Use

These pumps are designed for supplying clean water for domestic use, garden irrigation, and as submersible pumps for rainwater and technical water. They can be used for draining swimming pools, ponds, and tanks. The maximum permissible temperature of the pumped medium is 35°C. Do not use for drinking water or food products. Do not pump explosive, flammable, aggressive, or health-hazardous substances. The pumps are not intended for professional or industrial use.

Technical Specifications

The technical specifications for each model are detailed on page 3. Key parameters include voltage (U), frequency (f), power input (P1), capacitor (C), speed (n), maximum flow rate (Fv,max), maximum delivery head (Fh,max), maximum delivery pressure (Fp,max), switch-on pressure (P1), switch-off pressure (P2), maximum suction head (Sh,max), maximum delivery temperature (Stemp), ambient temperature (Ttemp), protection class (S1, S2, S3), pump housing material (Mp), pump shaft material (MR), impeller material (Mw), suction port thread (Ds), discharge port thread (Dp), tank capacity (Tv), maximum tank pressure (Tp,max), and priming pressure (Tp,1). Dimensions (A) and weight (m) are also provided.

The performance curves on page 3 illustrate the pump's performance relative to the delivery head.

Installation and Commissioning

Installation:

The pump must be placed on a level surface capable of supporting its weight when filled with water.
To minimize vibration, the pump should not be rigidly fixed but mounted on an elastic base.
The installation site should be well-ventilated and protected from the elements. Protect against frost (see section 8.2).
When used in ponds or swimming pools, ensure the pump is protected from falling and consider potential water level fluctuations. Comply with relevant legal requirements.

Suction Line Connection:

The suction line must be installed without mechanical stress on the pump.
Use a suction filter to protect the pump from sand and debris.
A check valve is required to prevent water from draining out of the pump when it is switched off. Metabo recommends check valves on the suction hose inlet and the pump's suction port.
All threaded connections must be sealed with thread sealing tape to prevent air ingress.
The suction line should have an internal diameter of at least 1" (25 mm) and be resistant to kinks and vacuum.
Keep the suction line as short as possible to maintain performance.
The suction line should always rise towards the pump to prevent air pockets.
Ensure adequate water supply, with the suction line end always submerged.

Discharge Line Connection:

The discharge line must be installed without mechanical stress on the pump.
Seal all threaded connections with thread sealing tape.
All discharge line components must withstand the pressure and be installed by qualified specialists. Failure to do so can result in the discharge line bursting, causing injury.

Connection to Piping Systems: Use flexible connecting hoses to reduce vibration and noise.

Electrical Connection: Connect only to properly installed and grounded outlets. Ensure voltage, frequency, and fuse match specifications. Use an RCD with a maximum tripping current of 30 mA. Protect electrical connections from water. Extension cords must have adequate cross-section and be fully unwound. Comply with national installation regulations.

Filling the Pump and Priming:

Before initial use or after water loss, the pump must be filled with water. Operating without water will damage the pump.
Unscrew the filling port plug (5).
Slowly fill the pump with clean water until it is full.
Screw the filling port plug back in.
Open the discharge line (e.g., turn on a tap) to allow air to escape during priming.
Switch on the pump (see section 7).
If water flows evenly, the pump is ready.
The suction line does not need to be filled as the pump is self-priming. Priming may take time depending on line length and diameter.

Operation

General: Ensure the pump and suction line are connected and filled (see section 6). Never operate the pump dry.

Pump (P... models): The pump operates when the ON/OFF switch (8) is activated. Do not operate with a closed discharge line for more than 5 minutes.

Domestic Water Supply Unit (HWW... models): The unit switches on when water pressure drops below the cut-in pressure and switches off when it reaches the cut-out pressure. The pressure vessel with a diaphragm allows for small water withdrawals without starting the pump.

Operation Steps:

Insert the plug into the socket.
Switch on the pump using the switch (8).
Open the discharge line.
Ensure water is flowing.
After use, switch off the pump using the switch (8).

Maintenance

Danger! Before performing any maintenance, disconnect the power plug and ensure the system is not under pressure.

All maintenance and repair work should be performed by qualified specialists.

Regular Maintenance: Inspect the unit and connected equipment for damage. Check suction and discharge lines for leaks. Clean or replace the suction filter if flow rate decreases. Check and adjust the pressure vessel's pre-charge pressure (10) if necessary (see section 9.4).
Frost Protection: Freezing temperatures (< 4°C) can damage the unit as it retains water. In frost-risk conditions, dismantle the unit and store it in a frost-free location.
Dismantling and Storage: Switch off the pump, disconnect the power plug, open the discharge line to drain all water. Empty the pump (7) and pressure vessel (10) by removing the drain plug (1). Dismantle suction and discharge lines. Store the unit in a frost-free environment (min. 5°C).

Troubleshooting

Pump Not Working: Check power supply, switch, cable, plug, and fuse. Ensure adequate voltage. If the motor is overheated, it will restart automatically after cooling. Ensure adequate ventilation and do not exceed maximum delivery temperature. If the motor hums but does not start, check for obstructions in the fan wheel. If the pump is blocked or faulty, it may require disassembly and cleaning or replacement of parts.

Pump Not Suctioning Properly or is Noisy: Check water supply, pump filling, and suction line for leaks or excessive suction height. Ensure the suction filter is clean and the check valve is functioning correctly. Address any leaks between the motor and pump housing (mechanical seal). If the pump is blocked or faulty, refer to troubleshooting for a non-working pump.

Low Delivery Pressure or Long Running Time: Check suction line for leaks or excessive suction height. Check for pump blockage or faults. For HWW models, check and adjust pressure switch settings and pre-charge pressure in the pressure vessel.

Increasing Pre-charge Pressure (HWW models only): If the pump frequently starts with small water draws, the pre-charge pressure in the pressure vessel may need to be increased. Follow the instructions in section 9.4 to connect an air pump or compressor to the air valve and inflate to the specified pressure.

Accessories

Use only genuine Metabo accessories that meet the specified requirements. Refer to the Metabo website or catalog for a full range of accessories.

Repair

Danger! Repairs must be carried out by qualified electricians only. Contact your local Metabo representative for repairs. Ensure the pump and pressure vessel are completely emptied before shipping.

Environmental Protection

Dispose of the product, accessories, and packaging in accordance with national regulations for recycling and disposal. Do not dispose of electrical tools with household waste.

Technical Data and Manufacturer Information

Detailed technical specifications and explanations of symbols are provided on page 3. The manufacturer is Metabowerke GmbH, Metabo-Allee 1, D-72622 Nuertingen, Germany. Information regarding conformity, importer in Russia, date of manufacture (encoded in the serial number), warranty period, and service life is also provided.

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