8.7 Replacement of UPM3 or UPM4 pump
ALPHA2 GO can be used to replace the majority of integrated
UPM3 or UPM4 circulator pumps. This means that when replacing
an existing circulator pump, the new ALPHA2 GO pump replicates
the performance as well as PWM configuration of the existing
circulator pump. In the Grundfos GO app (via the GO Replace
tool) or online via https://grundfos.to/replace, you can check
the compatibility of the pump.
During the replacement process, Grundfos GO guides you step-by-
step through the setup of the new circulator pump to match the
existing circulator pump. The replication process can be initiated
directly from the GO Replace tool or through the guided setup
when initially connecting the pump to Grundfos GO.
8.7.1 Replacing a UPM3 or UPM4 pump
To finish the configuration of a UPM3 or UPM4 pump after
replacing it, follow these steps:
In order to replicate a pump controlled via a PWM signal,
the ALPHA2 GO pump also requires input from the same
PWM signal. Mini superseal to FCI signal cable
adapter can be found in the section on accessories.
1. Open Grundfos GO.
• The QR code on the front of the ALPHA2 GO circulator pump
leads you to GO Replace in Grundfos GO.
• If the app is not installed, the QR code leads you to a
download site guiding you to install the app on your device.
2. Go to GO Replace.
GO Replace can be found in the Products tab or in the
Overview tab after it has been added to Your tools.
3. To identify the product being replaced, scan the nameplate or
enter the 8-digit product number that can be found after “PN:” on
the nameplate.
4. Select an ALPHA2 GO pump from the list to be
used as replacement of the existing circulator pump.
5. Follow the instructions in Grundfos GO to match the
performance and the configuration of the existing circulator
pump with the new ALPHA2 GO pump.
During the replication process the ALPHA2 GO
circulator pump must be connected to Grundfos GO via Bluetooth
connection. Grundfos GO downloads the configuration from the
cloud to set the ALPHA2 GO circulator pump to match the
performance and configuration of the existing circulator pump.
Related information
9.2 Connecting the product to Grundfos GO
11.13 Code 25 (Incorrect PWM configuration)
9. Setting of the product
The operating panel can be used for the following:
• Connecting to Grundfos GO.
• Selecting proportional pressure (radiator system), constant
pressure (underfloor heating system) or constant curve (speed).
• Selecting pump setting (I, II, III or AUTOADAPT) for the three
control modes available on the operating panel.
In Grundfos GO you can access all settings.
Related information
7.1 Operating panel
9.1 Enabling Bluetooth
To activate Bluetooth on the pump, do as follows:
1. Press the Connect button to activate and deactivate Bluetooth.
• If the blue LED is flashing, the pump is ready to connect to a
device.
• If the blue LED is permanently on, the pump is connected to
Grundfos GO.
9.2 Connecting the product to Grundfos GO
Before connecting the product to Grundfos GO, the Grundfos GO
app must be downloaded to your smartphone or tablet. The app is
free of charge and available for iOS and Android devices.
The connection can be started either from the operating panel
or Grundfos GO. If you have several products installed, we
recommend starting the connection from the operating panel.
1. Open Grundfos GO on your device. Make sure that Bluetooth is
enabled.
Your device must be within reach of the product to establish
Bluetooth connection.
2. Go to the Remote menu in Grundfos GO.
3. Press the Connect button on the operating panel.
The LED next to the Connect button flashes until your device is
connected.
4. Press CONNECT in Grundfos GO.
Once the connection is established, the LED is permanently on.
Grundfos GO is now loading the data for the product.
Related information
6. Starting up the product
6.1 Venting the product
8.7.1 Replacing a UPM3 or UPM4 pump
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