Grundfos magna3 - Type Key; Model Type Identification; Twin-Head Pump Heads

Proportional pressure
Constant pressure
FLOW
ADAPT
Constant temperature
Dierential temperature
SETTINGS
Control mode
2
Recommended for most heating systems. During operation, the pump automatically
makes the necessary adjustment to the actual system characteristic.
The FLOW
ADAPT control mode combines a control mode and a function:
• The pump is running in AUTO
ADAPT.
• The delivered ow from the pump will never exceed a selected FLOW
LIMIT.
The FLOWLIMIT function can
be activated in combination
with all of the below
control modes.
Used in systems with relatively large pressure losses in the distribution pipes.
The head of the pump will increase proportionally to the ow in the system to
compensate for the large pressure losses in the distribution pipes.
We recommend this control mode in systems with relatively small pressure losses.
The pump head is kept constant, independent of the ow in the system.
In heating systems with a xed system characteristic, for example domestic hot-water
systems, the control of the pump according to a constant return-pipe temperature is relevant.
Ensures a constant dierential temperature drop across heating and cooling systems.
The pump will maintain a constant dierential temperature between the pump and the external sensor.
Δt
Δt
Δt
Δt
Two-pipe
Make sure that the operating mode is set to ”Normal” in order for the pump to run according
to the available control modes. The table shows the dierent control modes along with
a recommended application type.
2
Δt
Δt
Constant curve
The pump can be set to operate according to a constant curve, like an uncontrolled pump.
Set the desired speed in % of the maximum speed in the range from minimum to 100 %.
Δt
Constant ow
The pump maintains a constant ow in the system, independently of the head.
No external sensor is required.
Two-pipe
One-pipe
Underoor
Hot water
Hot water
Hot water
Two-pipe
AUTOADAPT