GRUNDFOS Magna1 65-150 F Circulator Pump 240V 99221375 #4792

GRUNDFOS MAGNA1 65-150 F – 1 × 230V Energy-Efficient Circulator Pump (99221375) #4792

This listing is for a Grundfos MAGNA1 high-efficiency wet-rotor circulator pump. MAGNA1 is designed as a simple, reliable and maintenance-free solution for heating and cooling circulation where basic control and monitoring are required without the complexity of advanced building management integration.

The pump features a permanent-magnet synchronous motor with integrated frequency converter, providing significantly higher efficiency than traditional fixed-speed circulators and ensuring compliance with EuP 2015 energy regulations.

Condition: supplied as surplus / unused stock. The unit may show cosmetic marks consistent with storage and handling. It is inspected prior to dispatch.
Guarantee: supplied with our 2-year guarantee.

• Pump type: MAGNA1 wet-rotor electronically controlled circulator
• Connection: DN65 DIN flanges (PN 6/10)
• Port-to-port length: 340 mm
• Electrical supply: 1 × 230 V, 50 / 60 Hz
• Motor: 4-pole permanent-magnet synchronous (PM)
• Control: integrated frequency converter with simple user interface
• Communication: Grundfos GO Remote compatible

Need help confirming suitability?
Call us on 01803 220416 for technical advice.

Manufacturer product page

Full technical specifications, curves and documentation can be viewed on the official Grundfos product page:
View Grundfos MAGNA1 65-150 F (99221375) – Variant details

Typical applications

• Heating systems and mixing loops
• Radiator and underfloor heating circuits
• Air-conditioning and chilled water surfaces
• Ground-source heat pump systems
• Small chiller and light commercial circulation

Frequently Asked Questions

Why choose a MAGNA1 instead of a MAGNA3?

The MAGNA1 is intended for users who need a high-efficiency, reliable circulator without advanced BMS features. Compared with MAGNA3:

• MAGNA1 offers simpler setup and operation with lower cost
• Ideal where only basic control modes are required
• Still provides major energy savings via PM motor and integrated drive
• Includes fault relay and digital start/stop input

Choose MAGNA3 when you need:

• Advanced flow estimation and heat-energy monitoring
• Full building management communication (BACnet/LON)
• Multi-pump cascade and advanced control functions

For straightforward HVAC circulation where simplicity and efficiency are the priority, MAGNA1 is usually the better value choice.

Is the pump maintenance-free?

Yes. MAGNA1 uses a canned-rotor wet-rotor design with no mechanical seal, eliminating routine seal replacement and providing very quiet operation.

How is the pump controlled?

The controller and operating panel are integrated into the pump. The pump can be:

• Set directly on the onboard interface
• Monitored via the fault relay output
• Started/stopped remotely via digital input
• Connected wirelessly using Grundfos GO Remote

What makes the motor efficient?

MAGNA1 uses a permanent-magnet synchronous motor controlled by an integrated frequency converter. This provides higher efficiency than conventional asynchronous motors and automatically adapts speed to system demand.

About Our Stock

Stock code: #4792
We specialise in supplying quality pumps and equipment. This unit is supplied as surplus stock, inspected prior to dispatch and supplied with a 2-year guarantee.