Grundfos ALPHA2 GO 32-60 180 Circulator Pump

The Grundfos ALPHA2 GO 32-60 180 circulator pump, reference 93074214, is a high-efficiency electronic circulator designed to move water in heating and air conditioning systems. It offers a maximum head of 6 meters, a nominal flow rate of 1.9 m³/h, modulating electrical power of just 3 to 37 W, G 2" threaded connections, and an installation length of 180 mm.

The ALPHA2 GO includes advanced control and commissioning functions, including AUTOADAPT, proportional pressure, constant pressure, constant flow, constant curve, and PWM input. It can also be connected directly to the Grundfos GO app, making guided setup, hydraulic balancing, replacement of existing circulators, air detection, and system diagnostics easier.

Circulator pump with a maximum head of 6 meters

The Grundfos ALPHA2 GO 32-60 180 provides a maximum head of 6 m. For reference 93074214, Grundfos specifies a nominal point of 1.9 m³/h flow rate and 3.26 m head.

The actual operating point will depend on the hydraulic resistance of the circuit, the required flow rate, and the selected control mode.

Thanks to its electronically commutated motor and integrated frequency converter, the circulator can continuously adapt its speed and consumption to the real needs of the installation.

Smart AUTOADAPT control

The ALPHA2 GO incorporates the AUTOADAPT function, designed to automatically optimize the pump operating point according to the system’s heat demand.

AUTOADAPT is available for both proportional pressure and constant pressure, avoiding the need for the installer to manually select a single setpoint.

Grundfos recommends AUTOADAPT for common applications such as radiator heating systems and underfloor heating circuits.

Different control modes

The Grundfos ALPHA2 GO allows its hydraulic behavior to be adapted to different types of circuits through various control modes:

• Proportional pressure: adapts the differential pressure as the demanded flow changes, especially suitable for radiator installations with thermostatic valves.
• Constant pressure: maintains a stable differential pressure even when flow varies, especially useful in underfloor heating systems and manifold systems.
• Constant flow: regulates operation to maintain the configured flow rate.
• Constant curve: allows operation according to a selected fixed curve.
• AUTOADAPT: automatically optimizes the pump setpoint.
• PWM control: allows speed management from a compatible external controller.

PWM input for external control

The ALPHA2 GO features a PWM input, allowing an external system to precisely control the circulator speed via a compatible signal.

This feature is especially useful when the pump is integrated with boilers, heat pumps, or other generators capable of directly managing an electronic circulator.

Direct connection with Grundfos GO

The ALPHA2 GO can be connected directly to the Grundfos GO app, providing professionals with additional tools for installation, commissioning, and maintenance.

Direct communication allows access from a compatible mobile device to different functions, including:

• Guided setup.
• Control mode selection.
• Setpoint calculation and configuration.
• AUTOADAPT.
• Hydraulic balancing.
• Air detection and venting.
• Operating data review.
• Event, warning, and alarm log.
• Historical operating data.
• Assistance for replacing other circulators.

Guided setup for precise commissioning

Grundfos GO includes a guided setup function for ALPHA2 GO. The installer enters basic information about the circuit, and the app helps identify the most suitable control mode and setpoint.

In many applications, the recommended setting may be AUTOADAPT. When this mode is not the most appropriate, the app helps calculate a specific setpoint according to the system’s hydraulic conditions.

Especially suitable for circulator replacement

The ALPHA2 GO range is also designed to facilitate the replacement of existing circulator pumps.

Using Grundfos GO, it is possible to identify an old circulator and check which ALPHA GO model is suitable as a replacement. The ALPHA2 GO is especially prepared to replace both standalone pumps and certain integrated models from the UPM3 and UPM4 families.

In compatible replacements, the app allows the operating curves of the replaced pump to be reproduced, making it easier to adapt the new unit to the existing system.

Air detection and venting

The ALPHA2 GO includes an air detection function that can be activated through Grundfos GO.

When the pump detects air around the impeller, it temporarily changes its operation through pulses to help move it toward the system’s air vents.

This function makes commissioning easier and helps detect hydraulic issues related to the presence of air. However, it does not replace proper system design and venting.

Dry-run protection

The circulator includes dry-run protection. If it detects an insufficient amount of liquid around the rotor, the electronics can stop the pump to protect it.

The issue can be displayed through alarm indications and is recorded in the ALPHA2 GO event system to make diagnosis easier.

Robust startup against blockages

The Robust Startup function is designed to reduce starting problems caused by dirt, magnetite, or limescale deposits.

If the rotor encounters resistance, the motor makes new attempts using the maximum available torque to try to restore movement.

This function is especially useful after long periods of inactivity in a heating system.

Ceramic shaft and bearings

The ALPHA2 GO uses a ceramic shaft and bearings, components designed to experience reduced wear during operation.

The smaller variation in internal clearances over time helps maintain stable operation and reduce noise associated with mechanical wear.

Event log and diagnostics

Connection with Grundfos GO allows access to historical information to facilitate maintenance and diagnostic tasks.

Available data includes trends related to:

• Flow rate.
• Head.
• Estimated fluid temperature.
• Operating cycle duration.
• Warnings and alarms.

These data help the installer analyze the hydraulic behavior of the system and identify possible anomalies.

Hydraulic balancing with Grundfos GO

The ALPHA2 GO allows hydraulic balancing tasks to be carried out with assistance from the Grundfos GO app.

A properly balanced system distributes the required flow among the different emitters or circuits, helping to avoid areas with excess or insufficient circulation.

This function is especially practical in installations with multiple radiators or underfloor heating circuits.

High energy efficiency with EEI 0.18

Reference 93074214 has an energy efficiency index EEI of 0.18.

The absorbed electrical power is regulated between:

• Minimum power: 3 W.
• Maximum power: 37 W.

By automatically adapting its operation to the hydraulic needs of the circuit, the pump avoids running permanently at maximum power when demand is lower.

Single-phase 220-240 V power supply

The Grundfos ALPHA2 GO 32-60 180 operates with a single-phase 220-240 V, 50/60 Hz power supply.

Current consumption is approximately between 0.04 and 0.40 A.

The pump includes electronic thermal protection and has insulation class F.

Quick electrical connection

Grundfos equips the ALPHA2 GO with a tool-free installation connector, developed to simplify and speed up wiring during a new installation or replacement.

This feature is especially useful for professional installers who frequently replace circulators.

G 2" hydraulic connections

Reference 93074214 uses G 2" threaded connections in accordance with ISO 228-1.

This is an important difference compared with the ALPHA2 GO 25-60 versions, which use G 1½" connections. Before carrying out a replacement, it is necessary to check both the connection size and the installation length.

Installation length of 180 mm

The 180 designation of the model corresponds to a 180 mm distance between connections.

This measurement makes it easier to integrate into multiple heating and air conditioning systems and should be checked especially when the pump replaces an already installed circulator.

Maximum operating pressure of 10 bar

The pump is designed for a maximum operating pressure of 10 bar.

The hydraulic connections are rated PN 10, so the installation must be designed so that this limit is not exceeded during operation.

Liquid temperature from 2 to 110 °C

Grundfos specifies a liquid temperature range of 2 to 110 °C for reference 93074214.

The permitted ambient temperature around the pump is between 0 and 55 °C.

These conditions make it suitable for different closed heating and air conditioning circuits, provided that the fluid and the other system components are compatible.

Cast iron pump housing

The hydraulic housing is made of EN-GJL-150 cast iron, a material commonly used in circulators intended for closed circuits.

The impeller is made of reinforced composite material with PES and glass fiber.

IP44 protection

The Grundfos ALPHA2 GO 32-60 180 has an IP44 protection rating.

Installation must be carried out respecting the permitted orientations, environmental conditions, and electrical instructions specified by Grundfos.

Technical features of the Grundfos 93074214

• Brand: Grundfos.
• Range: ALPHA2 GO.
• Model: ALPHA2 GO 32-60 180.
• Reference: 93074214.
• Type: high-efficiency electronic circulator pump.
• Application: heating and air conditioning.
• Nominal flow rate: 1.9 m³/h.
• Nominal head: 3.26 m.
• Maximum head: 6 m.
• Installation length: 180 mm.
• Connection type: threaded G.
• Connection size: G 2".
• Connection standard: ISO 228-1.
• Nominal pressure: PN 10.
• Maximum operating pressure: 10 bar.
• Liquid temperature: 2-110 °C.
• Ambient temperature: 0-55 °C.
• Power supply: 1 x 220-240 V.
• Frequency: 50/60 Hz.
• Minimum absorbed power: 3 W.
• Maximum absorbed power: 37 W.
• Minimum current: 0.04 A.
• Maximum current: 0.40 A.
• Energy efficiency index EEI: 0.18.
• Frequency converter: integrated.
• Thermal protection: electronic.
• Protection rating: IP44.
• Insulation class: F.
• Housing material: EN-GJL-150 cast iron.
• Impeller material: reinforced composite.
• Proportional pressure: yes.
• Constant pressure: yes.
• Constant flow: yes.
• Constant curve: yes.
• AUTOADAPT: yes.
• PWM input: yes.
• Compatible with Grundfos GO: yes.
• Guided setup: yes.
• Air detection and venting: yes.
• Dry-run protection: yes.
• Robust startup: yes.
• Hydraulic balancing: yes, via Grundfos GO.
• Event and trend logging: yes.
• Head orientation: 9H.
• Approvals: CE and VDE.
• Net weight: 2.09 kg.
• Gross weight: 2.27 kg.
• EAN: 5715467404418.

Smart circulator for heating and air conditioning

The Grundfos ALPHA2 GO 32-60 180 combines a maximum head of 6 meters, G 2" connection, 180 mm installation length, and low consumption of 3 to 37 W with the smart functions of the ALPHA2 GO range.

Its regulation through proportional pressure, constant pressure, constant flow, constant curve, and AUTOADAPT allows it to adapt to different hydraulic circuits, while the PWM input facilitates integration with external controls.

Guided setup, air detection, dry-run protection, hydraulic balancing, and diagnostics via Grundfos GO provide additional tools for the installer, making it a particularly complete solution for new installations as well as the replacement and modernization of existing circulators.