Grundfos ALPHA2 15-40 130 - Control Modes

English (GB)
14
7.6 Button for selection of pump setting
Every time you press the button , the pump setting is changed.
See fig. 18, pos. 5.
A cycle is ten button presses. See section 7.3 Light fields
indicating the pump setting.
7.7 Control modes
7.7.1 Pump setting for two-pipe heating systems
Fig. 20 Selection of pump setting for system type
Factory setting: AUTO
ADAPT
.
Recommended and alternative pump settings according to fig.
20:
AUTO
ADAPT
The AUTO
ADAPT
function adjusts the pump performance to the
actual heat demand in the system. As the performance is
adjusted gradually, we recommend that you leave the pump in the
AUTO
ADAPT
mode at least one week before changing the pump
setting.
If the power supply fails or is disconnected, the pump stores the
AUTO
ADAPT
setting in an internal memory and resumes the
automatic adjustment when the power supply has been restored.
Proportional-pressure curve, PP1, PP2 or PP3
Proportional-pressure control adjusts the pump performance to
the actual heat demand in the system, but the pump performance
follows the selected performance curve, PP1, PP2 or PP3. See
fig. 21 where PP2 has been selected. For further information, see
section 11.1 Guide to performance curves.
Fig. 21 Three proportional-pressure curves/settings
The selection of the proportional-pressure setting depends on the
characteristics of the heating system and the actual heat
demand.
7.7.2 Pump setting for one-pipe heating systems
Fig. 22 Selection of pump setting for system type
Factory setting: AUTO
ADAPT
.
Recommended and alternative pump settings according to fig.
22:
AUTO
ADAPT
See section 7.7.1 Pump setting for two-pipe heating systems.
Constant-pressure curve, CP1, CP2 or CP3
Constant-pressure control adjusts the pump performance to the
actual heat demand in the system, but the pump performance
follows the selected performance curve, CP1, CP2 or CP3. See
fig. 23 where CP1 has been selected. For further information, see
section 11.1 Guide to performance curves.
Fig. 23 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.
TM05 3063 0912
Heating
system
Pump setting
Recommended Alternative
Two-pipe
system
AUTO
ADAPT
*
Proportional-pressure
curve, PP1, PP2 or PP3*
* See section 11.1 Guide to performance curves.
Q
H
TM05 3064 0912TM05 3065 0912
Heating
system
Pump setting
Recommended Alternative
One-pipe
system
Constant
curve/constant
speed, I, II or III*
Constant-pressure curve
CP1, CP2 or CP3*
* See section 11.1 Guide to performance curves.
TM05 3066 0912
PP3
PP2
PP1
Q
H
Q
H
Q
H
CP3
CP2
CP1