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5.3.2 Two-speed pumps, 3 x 460 V and 575 V
The speed setting in the terminal box can be
changed to two positions. The speed in the two
positions appears in the table below (also see
fig.
13
on page 10).
Speed step
Speed in % of max. speed
1
2
WARNING
Never make any connections in the
pump terminal box unless the
electrical supply has been switched
off.
Change the pump performance as follows:
The speed is changed by the position of the
jumpers in the terminals. The jumpers are fitted
according to:
•
figure
15
for speed 1 - low speed
•
figure
16
for speed 2 - high speed.
L3
P1
T3
P2
T5
Jumper wire
Fig. 15
Speed 1 (low speed)
L3
P1
T3
T4
P2
T5
Jumper wire
Fig. 16
Speed 2 (high speed)
approx. 75 %
100 %
L2
T2
T1
T4
T6
L2
T2
T1
T6
11
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