9.
DEPENDENCY BETWEEN PUMP SETTINGS AND ITS OPERATING PARAMETERS
Setting
Pump operating parameters curve
Function
AUTO (factory default setting)
From the highest to the lowest curve of
proportionate pressure characteristics
-
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.
PP1 / PP2 / PP3
Curves of proportionate pressure
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.
CP1 / CP2 / CP3
Curves of constant pressure
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.
I/II/III
Curves of constant rotary speed.
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.
10.
Efficiency curve
10.1
Efficiency curve guidance
Any pump setting will have a proper efficiency curve (Q / H curve). The AUTO (auto-
adaptation) 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.
10.2
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 / m
3
, temperature: + 60 °
C.
•
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)