IBO NOVA 25-40/180 Bedienungsanleitung Seite 20

DEPENDENCY BETWEEN PUMP SETTINGS AND ITS OPERATING PARAMETERS
Setting
AUTO
(factory setting)
Pp1 / Pp2
Cp1 / Cp2
I/II/III
EFFICIENCY CURVE
Efficiency curve guidance
Any pump setting will have a proper efficiency curve (Q / H curve). The AUTO (autoadaptation) mode covers the
efficiency scope. The input power curve (P1 curve) belongs to each Q/H curve. The power curve represents the pump
power consumption (P1) in Watt for the given Q/H curve.
Conditions to obtain the curve
The description below regards efficiency curves for MAGI series pumps:
• Pumped medium: water without gas.
• The water density for which the curves were created was ρ= 983.2 kg / m3 temperature: + 60 °
• All values expressed with curves are means, they cannot be treated as guaranteed curves. If a specific efficiency is
required, carry out a separate measurement for the given pump.
• The curves were created using pumped water kinematic viscosity υ = 0.474 mm2 / s (0.474CcST)
The reference criterion for the most energy-efficient circulators is EEI ≤ 0.20. For the NOVA pump, EEI≤0.20, this
means that the NOVA pump is an energy-saving pump.
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Pump operating parameters curve
From the highest to the lowest curve of
proportionate pressure characteristics
Curves of proportionate pressure
Curves of constant pressure
Curves of constant rotary speed.
Function
- The AUTO function controls the pump efficiency
automatically in the specified range.
- It adjusts the pump efficiency depending on the
system size;
- It adjusts the pump efficiency according to the
load change for a certain period of time;
- In the AUTO mode, the pump is set for the
proportional pressure control mode
The operating point will move up and down along
the proportional pressure curve depending on the
demand of the system flow: when the flow demand
decreases - the water pump pressure drops;
whereas when the energy demand increases -
it increases.
The operating point of the pump moves forward
and backward o the constant pressure curve
according to the system demand. The water pump
pressure remains constant, it has no relation to
the flow demand.
HS (1-3), the pump is set for the maximum curve
in all operating conditions. If the pump is set in
the HS3 mode, the pump will be vented quickly.