Electrical Connection; Start-Up - Grundfos UPE Series 2000 Montage- Und Betriebsanleitung

4. Electrical connection

The electrical connection and protection should be
carried out in accordance with local regulations.
Never make any connections in the pump
terminal box unless the electricity supply
has been switched off for at least 5 min-
utes.
The earth terminal of the pump must be
connected to earth.
The pump must be connected to an exter-
nal mains switch with a minimum contact
gap of 3 mm in all poles.
Megging must be carried out as described
in section 9. Megging.
• The pump requires no external motor protection.
• The operating voltage and frequency are marked
on the pump nameplate. Please make sure that
the motor is suitable for the electricity supply on
which it will be used.
• Supply voltage:
1 x 230-240 V –10%/+6%, 50 Hz, PE.
• Mains connection is to be carried out as shown in
figs. 7 and 8.
Fig. 7
UPE 25-40, 25-40 A, 25-60, 25-60 A, 32-40 and
32-60
L N
Mains connection of UPE xx-40 and UPE xx-60 is
shown in page 293.
Fig. 8
UPE 25-80, 32-80, 40-80 and 50-80
L N
Mains connection of UPE xx-80 is shown in page
294.

5. Start-up

Do not start the pump until the system has been
filled with liquid and vented. Furthermore, the re-
quired minimum inlet pressure must be available at
the pump inlet, see section 10. Technical data.
The system cannot be vented through the pump.
To vent the pump, remove the vent screw, fig. 9,
switch on the electricity supply and ensure maximum
flow in the system.
When any remaining air has escaped, replace and
tighten the vent screw.
When the vent screw is removed, scalding
hot liquid under high pressure may es-
cape. Care should be taken to ensure that
the escaping liquid does not cause per-
sonal injury or damage to other compo-
nents.
Fig. 9
The pump may be noisy, when first switched on, due
to air remaining in the chamber. The noise should
cease after a few minutes running.
After start-up, the desired operating mode and possi-
bly pump head are set.
7