Pump Settings And Pump Performance; Relation Between Pump Setting And Pump Performance - Grundfos ALPHA2 L Series Installation And Operating Instructions Manual

H
Lowest
PP1 proportional-
pressure curve
PP2 Highest
(factory proportional-
setting) pressure curve
Lowest
CP1 constant-
pressure curve
Highest
CP2 constant-
pressure curve
III Speed III
Contents:
Figure 13 shows the relation between pump setting and pump
performance by means of curves. See also
POWER
AUTO ON
I
Pump setting in relation to pump performance
The duty point of the pump will move up or down on the lowest
proportional-pressure curve, see fig. 13, depending on the heating
demand.
The head (pressure) is reduced at falling heating demand and
increased at rising heating demand.
The duty point of the pump will move up or down on the highest
proportional-pressure curve, see fig. 13, depending on the heating
demand.
The head (pressure) is reduced at falling heating demand and
increased at rising heating demand.
The duty point of the pump will move out or in on the lowest
constant-pressure curve, see fig. 13, depending on the heating
demand in the system.
The head (pressure) is kept constant, irrespective of the heating
demand.
The duty point of the pump will move out or in on the highest
constant-pressure curve, see fig. 13, depending on the heating
demand in the system.
The head (pressure) is kept constant, irrespective of the heating
demand.
ALPHA2 L runs at a constant speed and consequently on a
constant curve.
In speed III, the pump is set to run on the max. curve under all
operating conditions. See fig. 13.
Quick venting of the pump can be obtained by setting the pump to
speed III for a short period. See
PP1 CP1
PP2 CP2
II
20
.
.
III
Q
.