User Guide

23
English (US)
8.2 Operating modes
Normal
The pump runs according to the selected control mode.
Stop
The pump stops.
Min.
You can use the minimum curve mode in periods in which a
minimum flow is required. This operating mode is for instance
suitable for manual night setback if automatic night setback is not
desired.
Max.
You can use the maximum curve mode in periods in which a
maximum flow is required. This operating mode is for instance
suitable for hot-water priority.
Fig. 22 Maximum and minimum curves
8.3 Control modes
8.3.1 Factory setting
The pumps have been factory-set to AUTO
ADAPT
without
automatic night setback, which is suitable for most installations.
The setpoint has been factory-set. See section 8.6 Setting values
for control modes.
8.3.2 AUTO
ADAPT
We recommend the AUTO
ADAPT
control mode for most heating
systems, especially in systems with relatively large pressure
losses in the distribution pipes, and in replacement situations
where the proportional-pressure duty point is unknown.
This control mode has been developed specifically for heating
systems and we do not recommend it for air-conditioning and
cooling systems.
Characteristics and key benefits
• Automatically adjusts the pump to actual system
characteristics.
• Ensures minimum energy consumption and a low noise level.
• Reduced operating costs and increased comfort.
Technical specifications
Fig. 23 AUTO
ADAPT
control
The AUTO
ADAPT
control mode is a form of proportional-pressure
control where the control curves have a fixed origin, H
auto_min
.
When you have enabled AUTO
ADAPT
, the pump will start with the
factory setting, H
fac
= H
set1
, corresponding to approx. 55 % of its
maximum head, and then adjust its performance to A
1
. See fig.
23.
When the pump registers a lower head on the maximum curve,
A
2
, the AUTO
ADAPT
function automatically selects a
correspondingly lower control curve, H
set2
. If the valves in the
system close, the pump adjusts its performance to A
3
. See fig.
23.
You can select the control mode and setpoint even if
the pump is not running in Normal mode.
TM05 2446 5111
H
Q
Max.
Min.
TM05 2452 1312
A
1
: Original duty point.
A
2
: Lower registered head on the maximum curve.
A
3
: New duty point after AUTO
ADAPT
control.
H
set1
: Original setpoint setting.
H
set2
: New setpoint after AUTO
ADAPT
control.
H
fac
: See page 29.
H
auto_min
: A fixed value of 1.5 m.
Manual setting of the setpoint is not possible.
H
Q
H
auto_min
A
1
A
3
A
2
H
set1
H
set2