Starting Up The Product; Before Startup; First Startup; Venting The Pump - Grundfos ALPHA2 Series Installation And Operating Instructions Manual

4. Starting up the product

WARNING
Pressurised system
Death or serious personal injury
- Tighten the bolts before opening the isolating
valves. The pumped liquid may be scalding hot
and under high pressure.

4.1 Before startup

Do not start the pump until the system has been filled with liquid
and vented. Make sure that the required minimum inlet pressure
is available at the pump inlet. See section
instructions on how to vent the system, see section
the pump.

4.2 First startup

After installing the product, turn on the power supply. The light in
the operating panel shows that the power supply has been
switched on. See fig. 7.
The pump is factory set to AUTO
1 x 230 V ± 10 %
~ 50/60 Hz
1/On
0/Off
Fig. 7 Starting up the pump
10. Technical data. For
4.3 Venting
.
ADAPT

4.3 Venting the pump

Fig. 8 Venting the pump
The pump is self-venting through the system. You do not have to
vent the pump before startup.
Air in the pump may cause noise. This noise ceases when the
pump has run for a few minutes.
You obtain quick venting of the pump by setting the pump to
speed III. How fast the pump is vented depends on the system
size and design.
When you have vented the pump, that is when the noise has
ceased, set the pump according to the recommendations. See
section 6. Control modes.
The pump must not run dry.
You cannot vent the system through the pump. See section
5. Product introduction.
30 min
7