Grundfos ALPHA3 15-50/60 130 Circulator Pump | 99371966 | App-Controlled

Description

The Grundfos ALPHA3 15-50/60 130 (99371966) is a high-efficiency circulator pump for domestic heating, controlled entirely from your phone with Grundfos GO Remote over Bluetooth. Its energy efficiency index is 0.20 or lower, well below the ErP benchmark.

AUTOADAPT continuously adjusts pump performance to the real heat demand of the radiator or underfloor system, and the Grundfos GO Balance app supports fast flow-based hydronic balancing.

6 m

Maximum head

3-34 W

Power input range

EEI ≤ 0.20

ErP benchmark beaten

G 1½

Connection

130 mm

Port-to-port length

Bluetooth

GO Remote app

Commissioning from your phone

The pump is factory set to radiator mode with AUTOADAPT. Use Grundfos GO Remote for step-by-step configuration, maintenance and commissioning, including a built-in venting routine.

Check before you order

Match the 130 mm port-to-port length and G 1½ thread to the pump you are replacing. The system cannot be vented through the pump, and it must not run dry.

Safety

Isolate the electrical supply and allow the system to cool before working on the pump. Electrical connection must be carried out by a competent person in line with BS 7671.

Key features

AUTOADAPT

AUTOADAPT in radiator and underfloor modes adjusts the pump to system size and seasonal heat demand for comfort with minimal energy use.

Full app control

Bluetooth control through Grundfos GO Remote covers setup, maintenance and commissioning without buttons or a display.

Hydronic balancing

The GO Balance app enables fast, flow-based balancing of radiator and underfloor systems.

Four control modes

Proportional pressure, constant pressure and constant curve with setpoint adjustment, alongside AUTOADAPT.

Very low power

Power input runs from just 3 W to 34 W, with an EEI of 0.20 or lower.

Compact replacement

A 130 mm body with G 1½ connections makes it a straightforward swap for many existing circulators.

Specification

General

Brand

Grundfos

Model

ALPHA3 15-50/60 130

Manufacturer part number

99371966

Application

Domestic heating circulation

Hydraulic

Connection

G 1½

Port-to-port length

130 mm

Maximum head

6 m

Liquid temperature

+2 to +110 °C

Maximum system pressure

10 bar (PN 10)

Electrical

Supply

1 x 230 V, 50/60 Hz

Power input

3 W minimum, 34 W maximum

Energy efficiency index

EEI ≤ 0.20

Controls and connectivity

Control modes

AUTOADAPT, proportional pressure, constant pressure, constant curve

Connectivity

Built-in Bluetooth

Apps

Grundfos GO Remote, Grundfos GO Balance

Frequently asked questions

What does 15-50/60 mean?

50/60 refers to the 5 m and 6 m maximum-head ranges the pump covers, and 130 is the port-to-port length in millimetres.

Do I need a smartphone to set it up?

Yes. The ALPHA3 is fully controlled through the Grundfos GO Remote app over Bluetooth.

What is AUTOADAPT?

It continuously adjusts pump performance to actual heat demand, so the pump finds the setting that gives comfort with minimal energy use.

Is it suitable for underfloor heating?

Yes. It has dedicated radiator and underfloor control modes, both with AUTOADAPT.

Can I balance the system with it?

Yes. The GO Balance app supports fast flow-based hydronic balancing of radiator and underfloor systems.

What thread does it have?

G 1½, with a 130 mm port-to-port length.

BTU Calculator

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

Calculate

Required Heating

0

Watts

0

BTUs