Grundfos UPM3 Flex AS 25-70 130 Pump

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

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