Grundfos ALPHA1 L 25-60 180 Circulator Pump

The Grundfos ALPHA1 L 25-60 180 circulator pump is a high-efficiency solution designed for heating systems across a range of applications, including domestic, commercial, and industrial environments. This pump is equipped with a permanent magnet motor and ECM technology, optimising energy consumption and ensuring compliance with the ErP Directive standards. Its versatility allows it to be used in both new installations and existing systems, acting as an efficient and easy-to-integrate replacement.

The ALPHA1 L model offers three adjustable control modes, providing flexibility for different types of heating systems:

• Radiator heating mode, ideal for traditional systems.
• Underfloor heating mode, optimising flow for this type of system.
• Constant curve/speed mode, to maintain stable performance in specific applications.

The pump can be controlled via a PWM signal (pulse width modulation), allowing precise speed regulation according to demand, being compatible with digital systems and offering precise heating control. This PWM signal is specifically designed for heating applications, with a profile A ensuring maximum performance.

Thanks to its compact design, which includes a head with an integrated control box, the ALPHA1 L easily fits into the most common installations, including boilers, without the need for additional modifications. Its wet rotor structure ensures that the bearings are naturally lubricated by the pumped liquid, reducing maintenance and ensuring quiet and trouble-free operation. Additionally, the pump features a self-venting system, facilitating air removal during start-up and improving efficiency.

The cast iron hydraulic body and components made of stainless steel and composite ensure a long service life, even in the most demanding conditions. The pump is designed to withstand fluid temperatures between 2 °C and 95 °C, with a recommended operating temperature of 60 °C, making it suitable for heating systems in cold or moderate climates.

Technical Specifications:

• Nominal flow: 1.94 m³/h
• Nominal head: 3.28 m
• Body material: EN 1561 EN-GJL-150 cast iron, ASTM A48-150B
• Impeller: Composite PES+30% GF
• Maximum working pressure: 10 bar
• Connection size: 1 1/2" G
• Port-to-port length: 180 mm
• Minimum input power - P1: 4 W
• Maximum input power - P1: 45 W
• Nominal voltage: 1 x 230 V
• Network frequency: 50 / 60 Hz
• Protection grade: X4D
• Insulation class: F
• Liquid temperature range: 2 °C to 95 °C
• Net weight: 2.06 kg
• Gross weight: 2.2 kg
• Energy efficiency index (EEI): 0.20

Key Advantages:

• Three operating modes: The pump offers specific modes for radiator heating, underfloor heating, and constant curve, providing flexibility in different applications.
• High energy efficiency: Thanks to its permanent magnet motor and ECM technology, the pump optimises energy consumption and complies with the ErP Directive, ensuring a low environmental impact.
• Easy installation and maintenance: With a compact design and a self-venting system, the pump is easy to install and operate, reducing maintenance time and improving reliability.

The Grundfos ALPHA1 L 25-60 180 is an efficient, durable, and easy-to-integrate circulator pump for both new and existing heating systems. Its versatility and high performance make it an ideal choice for a wide range of heating applications, ensuring optimal flow control and energy consumption.