DESCRIPTION of the circulation pump ALPHA1 L

Grundfos ALPHA1 L represents an improved generation of ALPHA 2 L pumps. It is suitable for most heating systems where a circulation pump needs to be installed or an old energy-efficient pump needs to be replaced with a new one. It will serve perfectly as a replacement pump, which corresponds to 95% of boilers equipped with Grundfos pumps. Thanks to its compact design, easy connection to boiler signal cables (PWM) and tolerance at higher ambient temperatures, the ALPHA1 L can be easily connected to most boilers equipped with Grundfos pumps, regardless of boiler brand. This makes it possible to replace a malfunctioning or inefficient pump without the need for excess spare parts.

ALPHA1 L offers several operating modes and is suitable for use in one-pipe and two-pipe systems with radiators (variable flow) as well as for underfloor heating (constant flow). ALPHA1 L has an LED display that makes commissioning and controlling the pump very simple and fast.

USING the ALPHA1 L circulation pump

• single-pipe and two-pipe radiator heating systems
• floor heating

ADVANTAGES of the circulation pump ALPHA1 L

• high energy efficiency at an affordable price
• universal and reliable replacement pump – fits 95% of boilers equipped with Grundfos pumps
• compact design
• easy installation
• display for easy operation
• reliable performance and long service life
• possibility of pump regulation
• quiet operation, low noise level 42-43 dB (A)

Type key to product variants

E.g. ALPHA1 L 15-40 230V PN10 130mm 6H

• ALPHA1 L – pump type
• 15 – nominal diameter (DN) of the inlet and outlet
• 40 – maximum transport height [dm]
• 230V – supply voltage
• PN10 – pressure class (10bar)
• 130mm – built-in length