ASSIST
5
One pump is operating continuously.
The backup pump is operated at
intervals to prevent seizing up.
If the duty pump stops due to
a fault, the backup pump
will start automatically.
Congure on the master pump.
From model D: A sensor can also be installed on
the slave, but as long as the master is powered
up, the input on the slave will be ignored. If the
master loses power, the input of the slave will
take over.
* As a general rule, pumps older than model C must have a CIM mounted in both the
slave and master pump. However, pumps from model C supports newer versions of
CIMs, making it possible only to mount the CIM on the master pump. See installation
and operating instructions for MAGNA3 model D for a list of supported CIM versions.
Congure on both
master and slave pump.
Check the display to identify
the master pump.
Check the nameplate
or display to identify
the master pump.
All pumps in operation will run at equal speed
and will cut in and out depending on system
load. Cascade operation can be used in constant
curve and constant pressure control modes.
Pumps will run as
single pumps.
Only one pump is operating at a time.
The change from one pump to the other
depends on time or energy. If one pump fails,
the other pump will take over automatically.
Multipump modes
How to congure input and output
How to identify the master pump
Alternating
operation
Back-up
operation
Cascade
operation
No
multipump
function
Analog input
Digital input
Fieldbus
module (CIM)*
Relay output
Multipump setup
Multipump systems
Twin-head pump
Master
Master
Slave
5
XXXXXXXXXXXXXXXXXXXXXXXX
P/N: XXXXXXXX
S/N: XXXXXXXX
PC: XXXX
Model: X
IP XXX TF XXX
Grundfos Holding A/S, DK - 8850 Bjerringbro, Denmark
EEI ≤ X.XX Part X
Made in Germany
Min.
Max.
X.XX
X.X
XXXX
XXXXX.XX
I
1
[A] P
1 [W] MPa
=
=
=
24 h
=
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