Control Modes: Quick Overview - Grundfos MAGNA3 Manual

MAGNA3

Control modes: Quick overview

AUTO
ADAPT
• We recommend this control mode for most heating systems.
• During operation, the pump automatically makes the necessary adjustment
to the actual system characteristic.
FLOW
ADAPT
The FLOW control mode combines a control mode and a function:
ADAPT
• The pump is running in AUTO
• The delivered flow from the pump will never exceed a selected FLOW
Proportional pressure
• Used in systems with relatively large pressure losses in the distribution
pipes.
• The head of the pump will increase proportionally to the flow in the system to
compensate for the large pressure losses in the distribution pipes.
Constant pressure
• We recommend this control mode in systems with relatively small pressure
losses.
• The pump head is kept constant, independent of the flow in the system.
Constant temperature
In heating systems with a fixed system characteristic, for example domestic
hot-water systems, the control of the pump according to a constant return-pipe
temperature is relevant.
.
ADAPT
H
A
1
H
auto_min
A
3
H
25 % Q
max
H
fac
H
auto_min
.
LIMIT
Q
H
H
set
H
set
2
H
H
4
H
set1
H
set2
A
2
Q
90 % Q
max
Q
fac
Q
Q
Q
15