Grundfos magna3 User Manual

Functions
MAGNA3
4
15
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
ADAPT
control mode combines a control mode and a function:
• The pump is running in AUTO
ADAPT
.
• The delivered flow from the pump will never exceed a selected FLOW
LIMIT
.
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.
H
Q
H
auto_min
A
1
A
3
A
2
H
set1
H
set2
H
Q
Q
max
90 %
Q
max
25 %
H
auto_min
H
fac
Q
fac
H
Q
H
set
H
set
2
H
Q
H
Q

Grundfos magna3 Specifications

General

Liquid Temperature Range	-10°C to +110°C
Max Operating Pressure	16 bar
Type	Circulator Pump
Series	MAGNA3
Operating Temperature Range	-10°C to +110°C
Ambient Temperature Range	0°C to +40°C
Protection Class	IPX4D
Power Supply	1 x 230 V, 3 x 230 V, 3 x 400 V
Control Mode	Constant pressure, Proportional pressure
Communication	Modbus RTU
Pump Housing	Cast Iron
Impeller	Composite
Enclosure Class	X4D
Approvals	CE, EAC
Connection	Flange
Weight	Varies depending on model
Power Consumption	Varies depending on model