HWA 3500 Inox - Water pump METABO - Free user manual and instructions
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| Product type | Water pump |
| Brand | Metabo |
| Model | HWA 3500 Inox |
| Category | Water pump |
| Proper use | Discharge of clean water, watering, irrigation, well pump, rainwater, emptying pools |
| Prohibited liquids | Drinking water, foodstuffs, salt water, explosive/flammable/corrosive substances, liquids >35 °C, sandy water |
| Housing material | Stainless steel |
| Power supply | Mains via 30 mA residual current device (RCD) |
| Motor protection | Dry-run protection, overheating, restart |
| Electronic functions | Automatic shut-off in closed pipe, dry-run protection, standby mode |
| Self-priming | Yes |
| Suction connection | Minimum inner diameter 25 mm (1") |
| Pressure connection | Recommended inner diameter 1" (25 mm) |
| Max operating pressure | 10 bar (pipe components) |
| Max liquid temperature | 35 °C |
| Maintenance | Regular filter cleaning, drain before frost |
| Frost protection | Store frost-free (min 5 °C) |
| Max suction height | Not specified - follow manufacturer's instructions |
| Max flow rate | Not specified - refer to performance curve |
Frequently Asked Questions - HWA 3500 Inox METABO
How to install the HWA 3500 Inox pump?
Install the pump horizontally in a dry, well-ventilated place protected from weather. Ensure a stable and level support. Keep a distance of at least 5 cm from walls. Do not screw the pump down; use an elastic support to avoid vibrations.
What is the maximum suction height of the pump?
The maximum suction height depends on the configuration and is not specified in the manual. Ensure not to exceed the suction height indicated in the technical specifications (page 3 of the manual). Use a non-return valve and fill the suction line if necessary.
What to do if the pump does not start?
First check the power supply (socket, fuse, cable). If the red LED is on, the dry-run protection is active: ensure sufficient water level and press the ON/OFF button (3). If the motor overheats, wait for it to cool down. If the problem persists, contact Metabo after-sales service.
How to bleed air from the pump after installation?
Open the pressure line (tap or nozzle). Unscrew the water filler screw (11), slowly fill with clean water until the pump is full, then retighten. Start the pump. Air escapes through the open line. Once water flows steadily, bleeding is complete.
Can the pump run continuously?
No, the pump is not designed for continuous operation. It is intended for domestic and garden use. Continuous use may cause overheating and damage the device.
What type of water can I use with the pump?
The pump is intended for clean water (rainwater, well water, pool water). Do not use drinking water, salt water, chemical liquids, abrasive liquids, or liquids above 35 °C.
How to clean the pump filter?
Unscrew the cover (14) using the key (13). Pull the filter unit (15) upward. Disassemble: secure the bowl (16), turn the filter (17) clockwise and remove the bowl. Clean the bowl under running water and the filter with a soft brush. Reassemble in reverse order.
What to do in case of risk of frost?
Frost destroys the pump because it contains water. If there is a risk of frost (temperature <4 °C), disassemble the pump and accessories. Completely drain the water by unscrewing the drain screw (8). Store the device in a frost-free location (min 5 °C).
What do the LED indicators mean?
Green LED (2) flashing slowly indicates standby mode. Steady green: normal operation. Fast flashing green then red: dry-run protection. Continuous red: fault. Blue: mode 'A' activated. Refer to chapter 7.1 of the manual for details.
Can I use the pump with a timer or an automatic water level controller?
Yes, but you need to activate mode 'A' by pressing the ON/OFF button (3) for 3 seconds. The LED turns blue. In this mode, the pump can be controlled by an external device. Dry-run protection remains active.
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