Starting Up The Product; Sba Starting And Stopping Conditions - Grundfos SB Serie Instrucciones De Instalación Y Funcionamiento

Make sure that there is at least 3 metres
free cable above the liquid level.
Check that the mains voltage and frequency
correspond to the values stated on the pump
nameplate.
3.7.1 Motor protection
The pump has a built-in thermal switch and requires
no additional motor protection.
When the motor has cooled to normal temperature, it
restarts automatically.
3.7.2 Connecting to external controller
SB
SB pumps must be connected to an external
controller. We recommend a Grundfos Pressure
Manager: net.grundfos.com/qr/i/97506325
SBA
SBA pumps have an integrated control unit.
3.7.3 Alternative power supply
The pumps can be powered by a generator or other
alternative power supplies, provided that the
requirements for the power supply are fulfilled. See
section 9. Technical data.
3.7.4 Power supply failure
In case of a power supply failure, the pump restarts
automatically when power returns and runs for at
least 10 seconds.
8

4. Starting up the product

WARNING
Flammable material
Death or serious personal injury
- Do not use the pump for flammable
liquids, such as diesel oil, petrol or
similar liquids.
DANGER
Electric shock
Death or serious personal injury
- Do not use the pump in swimming
pools, garden ponds or similar places if
there are people in the water.
1. Open a tap in the system.
2. Switch on the power supply.
3. Check that the pump is running and water is
coming out of the tap.
4. Check that the pump is running and pressure is
being built up in the system.
5. Close the tap.
6. Check that pressure has been built up in the
system.
7. Check that the pump stops after a few seconds.
Connect SB pumps to an external
controller.

4.1 SBA starting and stopping conditions

When water is consumed in the water supply system,
the pump starts when the starting conditions are
fulfilled. This happens for example when a tap is
opened which makes the pressure in the system
drop. The control unit stops the pump again when
consumption stops, that is when the tap is closed.
Starting conditions
The pump starts when one of the following
conditions is fulfilled:
• The flow rate is higher than minimum flow rate.
• The pressure is lower than the start pressure.
Stopping conditions
The pump stops with a time delay of 10 seconds
when the flow rate is lower than the minimum flow
rate.
The start pressure and minimum flow rate values are
shown in section 9. Technical data.