Grundfos ALPHA - Starting Up the Product; Venting the Pump; Dry-running Protection

8. Starting up the product
CAUTION
Radiation
Minor or moderate personal injury
‐ This equipment complies with FCC and ISED radiation
exposure limits set forth for an uncontrolled
environment. This equipment must be installed and
operated with a minimum distance of 20 cm (0.66 ft)
between the radiator and your body.
1. Fill the system with liquid and vent it.
2. Make sure the required minimum inlet pressure is available at
the pump inlet.
3. Switch on the power supply.
The pump is factory set to constant curve (zone pump),
AUTOADAPT.
You can change the settings on the operating panel or via Grundfos
GO. We recommend to follow the guided setup in Grundfos GO.
Related information
8.1 Venting the pump
10.2 Guided setup
8.1 Venting the pump
TM083494
Venting the pump
Small air pockets trapped inside the pump may cause noise when
starting up the pump. However, because the pump is self-venting
through the system, the noise ceases over a period of time. Still, we
recommend venting the pump in new installations or when the pipes
have been emptied and refilled with water. You can vent the pump
via Grundfos GO.
• If you follow the guided setup, you are asked if you want to vent
the pump now.
• If you do not follow the guided setup, you can access the
venting settings via the Settings menu.
The pump must not run dry.
You cannot vent the system through the pump.
Related information
8. Starting up the product
10.2 Guided setup
10.3 Air detection and system venting
8.2 Dry-running protection
The dry-running protection protects the pump against dry running
during startup and normal operation.
During startup
If water has not been detected, the pump rotates the impeller back
and forward. If water is still not detected, it attempts again after 30
seconds.
The pump stops after maximum 30 attempts, and the spinner icon
on the operating panel is spinning (temporary mode).
During normal operation
If dry running is detected during normal operation, the pump stops
for 30 minutes and attempts again. After 144 attempts, the
pump stops in alarm mode, Grundfos mini Eye flashes red and error
code E4 is displayed.
The pump can be restarted by pressing anywhere on the operating
panel (except the connect and lock icons). The pump will not detect
dry running if dry running has been detected during the past 25
hours. If the pump has previously detected water, the pump can
sustain 25 hours of dry-running operation.
Related information
9.2 Light fields indication
12.8.8 Code 57 (Dry running)
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English (US)