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IHBI. 1011. 4138500_00
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20 40 60 80 100
14. VOLUME OF THE WATER AND PUMP DISPLACEMENT
Average speed
Water fl ow rate (l/min)
Water fl ow rate (l/min)
Hydraulic pressure drop (mH
2
O)
Hydraulic pressure drop (mH
2
O)
ATTENTION
• The pump has three adjustable speeds (maximum/average/
minimum). In most cases, maximum speed is recommended.
• If pump noise is not acceptable, we recommend changing the
pre-set speed from maximum to medium, but in order to guaran-
tee a suffi cient fl ow rate, do not set the water speed at minimum
(“Min”), because it could cause a sudden fl ow rate error (“EC”).
0
1
2
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02040
60
80
100 120
Max. speed
Pump Speed
Minimum
Average
Maximum
If the pump is too noisy, we re-
commend that the pre-set speed is
changed from maximum to me-
dium.
Minimum pump speed does not
guarantee a suffi cient fl ow rate to
the system.
To act on the speed selector
switch, remove the protection lid
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