Electrical Connection; Ejector Valve; Ejector Valve Setting - Grundfos JP Booster PM 2 Gebrauchs- Und Sicherheitsanweisung

4. Electrical connection

Warning
The electrical installation should be carried
out by an authorised person in accordance
with local regulations.
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
Warning
During electrical installation, make sure
that the power supply cannot be
accidentally switched on.
Warning
The unit must be connected to an external
mains switch with a minimum contact gap
of 3 mm in all poles.
As a precaution, the pump must be
connected to a socket with earth
connection.
We recommend to fit the permanent
installation with an earth leakage circuit
breaker (ELCB) with a tripping current ≤
30 mA.

5. Ejector valve

The ejector valve is supplied separate with the
pump.
Remove the plug (V), see fig. 1, and fit the ejector
valve into the hole.
The O-ring must be fitted to the ejector
valve.
Note
Tighten the valve using fingers only.
T
Fig. 1 Ejector valve
P
S
V

5.1 Ejector valve setting

The ejector valve in the plug hole (V) can be turned
to two positions. See fig. 3.
Figure 2 shows an example of how the ejector valve
position may affect the QH curve.
H
[m]
45
40
35
30
25
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Q [m³/h]
0.00 0.25 0.50
Fig. 2 QH curve and ejector valve positions
Pos. 1
Turn the valve to the left (out).
Select pos. 1 when the suction pipe is empty and the
pump is to be primed.
Select also pos. 1 when a small quantity of water and
a high pressure are required.
Pos. 2
Turn the valve to the right (in).
Select pos. 2 when the pump has been primed, and
a large quantity of water and a low pressure are
required.
Pos. Ejector valve
1
2
Fig. 3 Ejector valve positions
J P 5
IS O 9906 Annex A
0.75 1.00 Q [l/s ]
Direction
Left
(out)
Right
(in)
5