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Starting the Pump
3a. Speed Selection
(three speed, all models except 3 x 460V
&
575V)
The speed switch in the terminal box can be turned to three positions. The speed in the
three positions appears in the table below (also see Fig.13).
Speed in % of
Switch
Maximum Speed
Position
Single-Phase
Three-Phase
Pumps
Pumps
1
approx.60%
approx.70%
2
approx.80%
approx.85%
3
100%
100%
Changing to lower speeds offers considerable reduction in energy consumption and less noise
in the system.
H
1
Q
Fig.13
H=Head and Q=Flow)
Pump Performance at Speed Settings
H
H
2
'"
Q
Q
WARNING: Never make any connections in the pump terminal box unless the
electricity supply has been switched off.
AVERTISSEMENT: Ne jamais etablir de connexions dans la borte de jonction
de fa pompe
a
moins que I'alimentation electrique n'ait ete coupee.
Change the pump performance as follows:
1.
Switch off the electrical supply to the pump at the main circuit breaker. The green
indicator light in the terminal box must be off.
2.
Remove the terminal box cover by loosening the four screws
in the cover.
j0
3. Pull out the speed switch module and re-insert it so that the
~
desired speed is visible through the window in the terminal box
lJ..])
(see Fig.14)
NOTE: When changing to and from speed
1, the cover of the speed switch module
must be removed and fitted on the other
side of the switch.
Continued on next page
Fig.14
SPEED
1
SPEED
2
SPEED
3
Page 8
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