Install Instructions

9
(QJOLVK86
5.3 Speed selection
5.3.1 Three-speed pumps, all models except
3 x 460 V and 575 V
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).
Changing to lower speeds offers considerable
reduction in energy consumption and less noise
in the system.
Fig. 13 Pump performance at speed
settings
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.
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 (see fig. 14).
Fig. 14 Speed switch module
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.
4. Fit the terminal box cover back onto the
terminal box and tighten the four screws in
the cover.
5. Switch on the electrical supply.
Check that the green indicator light is
permanently on or flashing.
NOTE: The speed switch module must never be
used as an on/off switch.
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 p. 9).
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.
Fig. 15 Speed 1 (low speed)
Fig. 16 Speed 2 (high speed)
Switch
position
Speed in % of maximum speed
Single-phase
pumps
Three-phase
pumps
1 approx. 60% approx. 70%
2 approx. 80% approx. 85%
3 100% 100%
TM03 7736 4806
Warning
Never make any connections in the
pump terminal box unless the
electrical supply has been switched
off.
TM03 7735 4806
H
Q
12
Q
H
H
Q
3
H = head and Q = flow
SPEED
1
SPEED
2
SPEED
3
Speed step Speed in % of max. speed
1 approx. 75%
2 100%
Warning
Never make any connections in the
pump terminal box unless the
electrical supply has been switched
off.
TM03 7734 4806
TM03 7733 4806
L3
L1
L2
P1
P2
T5
T4 T6
T3 T2 T1
Jumper wire
L3
L1
L2
P1
P2
T5
T4 T6
T3 T2 T1
Jumper wire