Grundfos GRUNDFOSSCALA23-45
GRUNDFOS SCALA2 3-45 Variable Speed Pump User Manual
Model: GRUNDFOSSCALA23-45
1. Produktüberschreitungview
The GRUNDFOS SCALA2 is a fully integrated, self-priming, compact all-in-one water booster pump designed to provide perfect water pressure in all taps at all times. This intelligent pump system automatically adjusts its performance to match both inlet pressure and water consumption, ensuring consistent water flow even when multiple taps or showers are in use simultaneously.
The SCALA2 integrates the pump, motor, tank, sensor, drive, and non-return valve into a single compact unit. Its water-cooled motor contributes to one of the lowest noise levels among booster pumps, comparable to a modern dishwasher (47 dB(A) in typical use).

Image 1.1: The Grundfos SCALA2 3-45 water booster pump, showcasing dank seiner kompakten Bauweise und integrierten Komponenten.
Hauptmerkmale:
- Intelligent Pump Control: Automatically adjusts operation to maintain constant water pressure.
- Geräuscharmer Betrieb: Water-cooled motor ensures quiet performance, approximately 47 dB(A).
- Compact All-in-One Solution: Integrates pump, motor, tank, sensor, drive, and non-return valve.
- Einfache Installation: Designed for plug-and-pump setup.
- Benutzerfreundliches Bedienfeld: Simple interface for operation and monitoring.
- Zuverlässiger Betrieb: Includes dry-running protection and anti-cycling features.
- Lange Lebensdauer: Robust and quality-tested for durability.
- Vielseitige Anwendung: Suitable for boosting water pressure from city mains, roof tanks, break tanks, ground tanks, and can pump water from a depth of 8 meters.
- Kapazität: Ideal for residential buildings with up to 3 floors and 8 taps.

Image 1.2: An internal cutaway view of the Grundfos SCALA2, illustrating its integrated pump, motor, and control components.
2. Einrichtung und Installation
The SCALA2 is designed for straightforward installation due to its compact, all-in-one nature. It is a "plug-and-pump" solution, meaning minimal assembly is required before operation.
2.1 Auspacken
Carefully remove the pump from its packaging. Inspect the unit for any signs of damage that may have occurred during transit. Ensure all components listed in the packing list (if provided separately) are present.

Image 2.1: The Grundfos SCALA2 pump as it appears when unboxed, showing the unit and its immediate packaging.
2.2 Überlegungen zur Platzierung
- The SCALA2 is suitable for both indoor and outdoor installation.
- Choose a stable, level surface for placement.
- Sorgen Sie für ausreichende Belüftung rund um die Pumpe.
- Position the pump close to the water source and the main water line to minimize pipe length and pressure loss.
- The pump can draw water from a depth of up to 8 meters.
2.3 Elektrischer Anschluss
The pump operates on AC power with a voltage of 160 Volts. Connect the pump to a suitable power outlet. Ensure the electrical supply matches the pump's requirements as specified on the product label.

Image 2.2: The Grundfos SCALA2 pump with protective yellow caps on its inlet and outlet ports, indicating readiness for plumbing connections.
2.4 Sanitäranschlüsse
Connect the inlet and outlet pipes to the pump. Ensure all connections are secure and watertight to prevent leaks. Refer to local plumbing codes and best practices for proper installation.
3. Bedienungsanleitung
The GRUNDFOS SCALA2 is designed for automatic and intelligent operation, requiring minimal user intervention once installed correctly.
3.1 Erstinbetriebnahme
- Ensure all plumbing connections are secure and the pump is properly positioned.
- Verify the power supply is connected.
- Turn on the power to the pump. The SCALA2 will perform an initial self-check.
- The pump is self-priming, meaning it can draw water and remove air from the suction line automatically.
- Open a tap in your home to allow water to flow. The pump will detect the demand and automatically start to maintain the desired pressure.
3.2 Intelligent Pump Control
The SCALA2 continuously monitors the discharge pressure. If the pressure drops below the set level (due to increased water consumption), the pump will immediately boost its operation to compensate, ensuring a constant and comfortable water pressure throughout your home. Conversely, if water consumption decreases, the pump will reduce its speed to save energy.
3.3 Systemsteuerung
The pump features a user-friendly control panel for monitoring status and making minor adjustments if necessary. Refer to the on-screen indicators for information on pump status, pressure settings, and any alerts.
4. Wartung
The GRUNDFOS SCALA2 is designed to be a maintenance-free unit, providing reliable operation without the need for regular servicing or lubrication.
4.1 Allgemeine Pflege
- Keep the pump area clean and free from debris.
- Sorgen Sie für eine ausreichende Belüftung rund um das Gerät.
- Periodically check for any visible leaks in the plumbing connections.
- Do not attempt to disassemble the pump for internal cleaning or repair, as this may void the warranty.
5. Fehlerbehebung
The SCALA2 is equipped with intelligent features to prevent common issues. However, if you encounter problems, consider the following:
5.1 Low or No Water Pressure
- Stromversorgung prüfen: Ensure the pump is receiving power and the circuit breaker has not tripped.
- Verify Water Supply: Confirm that there is an adequate water supply to the pump's inlet.
- Auf Lecks prüfen: Check all plumbing connections for leaks, which can cause pressure drops.
- Luft im System: The pump is self-priming, but if the water source was interrupted, it might need a moment to re-prime.
5.2 Pumpe läuft nicht
- Stromanschluss: Ensure the power cord is securely plugged in and the outlet is functional.
- Trockenlaufschutz: The pump has built-in dry-running protection. If the water source runs dry, the pump will stop to prevent damage. Restore water supply and the pump should restart automatically.
- Überlastschutz: If the pump has been subjected to an overload, it may shut down. Allow it to cool down before attempting to restart.
5.3 Ungewöhnliche Geräusche
- While the SCALA2 is designed for low noise, unusual sounds might indicate an issue.
- Luft im System: Air trapped in the system can cause gurgling or rattling noises. Allow the pump to run to clear the air.
- Trümmer: Check if any debris might have entered the pump (though unlikely with proper filtration).
For persistent issues not resolved by these steps, please contact Grundfos customer support.
6. Technische Daten

Image 6.1: Dimensions of the Grundfos SCALA2 pump, showing length, width, and height measurements.
| Attribut | Detail |
|---|---|
| Marke | Grundfos |
| Modellnummer | GRUNDFOSSCALA23-45 |
| Farbe | Schwarz, Grau |
| Material | Technopolymer |
| Stil | Kompakt |
| Produktabmessungen (L x B x H) | 46.6L x 37.4B x 25H Zentimeter |
| Artikelgewicht | 12 Kilogramm |
| Stromquelle | AC |
| Bandtage | 160 Volt |
| Maximale Hubhöhe | 8 Meter |
| Noise Level (typical use) | 47 dB(A) |
| Anwendungskapazität | Up to 3 floors and 8 taps |
7. Garantie und Support
Grundfos provides warranty and after-sales service for all Grundfos pumps purchased through authorized channels, in accordance with company policy.
7.1-Kontaktinformationen
For technical assistance, warranty claims, or service inquiries, please contact Grundfos customer support:
- Hersteller: GRUNDFOS, Grundfos Pumps India Pvt Ltd
- Telefon: 9811128788
- E-Mail (Verkauf): oneoffice.india@sales.grundfos.com, salesindia@grundfos.com
- Email (Service): serviceindia@grundfos.com
Please have your product model number (GRUNDFOSSCALA23-45) and purchase details ready when contacting support.
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