Grundfos UPM3 Flex AS 25-70 130 Pump
£135.36 incl. VAT
A-rated circulating pump with 7m max head and 130mm port-to-port length. Features PWM signal control, push-button interface, and adjustable constant speed curves (4-7m).
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Grundfos UPM3 FLEX AS 25-70 130 High Efficiency Pump
The Grundfos UPM3 FLEX AS 25-70 130 is a versatile high-efficiency circulating pump designed for both external PWM profile A signal control and internal speed selection. It features a user-friendly interface with a single push button and LED indicators, allowing users to define the maximum curve of the pump operation range easily.
This pump is engineered to run at corresponding speeds with a PWM signal, or at maximum speed without one, making it adaptable for various heating applications including underfloor heating.
Key Product Features
| Feature | Detail | Benefit |
| Control Signal | PWM Profile A or Internal | Flexible control options for system integration. |
| User Interface | Push Button & LEDs | Simple, intuitive operation and status monitoring. |
| Performance | Adjustable Max Curve | Customizable operation range to suit specific system needs (4m, 5m, 6m, 7m). |
| Operation | Constant Speed / PWM | Runs at defined speeds or modulates based on signal. |
| Safety | Alarm Status Indication | Visual alerts for blockage, low voltage, or electrical errors. |
| Key Lock | Prevents Misuse | Secures settings against accidental changes. |
Control Modes & Operation
The UPM3 FLEX AS offers specific control modes to optimize performance.
- PWM Profile A (Heating): The circulator runs on constant speed curves dictated by the PWM signal. The speed decreases as the PWM value increases. If the signal is lost (PWM=0), the pump defaults to maximum speed .
- Max Constant Curve: Useful for periods requiring maximum flow, such as hot-water priority .
- Min Constant Curve: Suitable for periods requiring minimum flow, like manual night setback .
User Interface & Settings
The pump’s interface provides immediate feedback on performance and settings.
- Performance View: During operation, the 5 LEDs (1 Green/Red, 4 Yellow) indicate the current power consumption (P1) as a percentage of the maximum.
- Alarm Status: If an error occurs, the bi-colored LED turns red, and the yellow LEDs indicate the specific fault (e.g., blocked rotor, low voltage) .
- Setting Selection: By pressing the button for 2-10 seconds, users can toggle through the available settings (4m, 5m, 6m, 7m max curves or PWM profiles) .
Technical Specifications
| Detail | Specification |
| Max Delivery Head | 7 meters (Adjustable to 4, 5, 6, 7m) |
| Connection Size | G 1 1/2″ (DN 25) |
| Port-to-Port Length | 130mm |
| Power Consumption | Indicated by LED scale (0-100%) |
| Control Signal | PWM Profile A (Heating) |
| Supply Voltage | 230V |




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