Control Modes - Grundfos ALPHA1 15-50 Bedienungsanleitung

7.5 Control modes

7.5.1 Pump setting for two-pipe heating systems
H
Fig. 16 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
16:
Heating
system
Recommended
Proportional-pressure
Two-pipe
curve PP1, PP2 or
system
PP3*
* See section 10.1 Guide to performance
Proportional-pressure curve, PP1, PP2 or PP3
Proportional-pressure control adjusts the pump performance to
the actual heat demand in the system. The pump performance
follows the selected performance curve, PP1, PP2 or PP3. See
fig. 17 where PP2 has been selected. For further information, see
section 10.1 Guide to performance
Fig. 17 Three proportional-pressure curves and settings
The selection of the proportional-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
14
Q
Pump setting
Alternative
Constant-pressure
curve CP1, CP2 or
CP3*
curves.
curves.
PP3
PP2
PP1
Q
7.5.2 Pump setting for one-pipe heating systems
H
Fig. 18 Selection of pump setting for system type
Recommended and alternative pump settings according to fig.
18:
Heating
system
Recommended
Constant-pressure
One-pipe
curve CP1, CP2 or
system
CP3*
* See section 10.1 Guide to performance
Constant-pressure curve, CP1, CP2 or CP3
The constant-pressure control adjusts the flow rate to the actual
heat demand in the system keeping a constant pressure at the
same time. The pump performance follows the selected
performance curve, CP1, CP2 or CP3. See fig.
been selected. For further information, see section
performance curves.
Fig. 19 Three constant-pressure curves and settings
The selection of the constant-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
Q
Pump setting
Alternative
Constant curve/constant
speed, I, II or III*
curves.
21 where CP1 has
10.1 Guide to
CP3
CP2
CP1