Brochure

Functions
MAGNA3
8
33
Additional operating modes for
multi-pump setup
Multi-pump function
The multi-pump function enables the control of
single-head pumps connected in parallel and
twin-head pumps without the use of external
controllers. The pumps in a multi-pump system
communicate with each other via the wireless GENIair
connection.
A multi-pump system is set up via a selected pump, i.e.
the master pump (first selected pump). All Grundfos
pumps with a wireless GENIair connection can be
connected to the multi-pump system.
The multi-pump functions are described in the
following sections.
Alternating operation
Only one pump is operating at a time. The change from
one pump to the other depends on time or energy. If a
pump fails, the other pump will take over automatically.
Pump system:
• Twin-head pump.
• Two single-head pumps connected in parallel. The
pumps must be of equal size and type. Each pump
requires a non-return valve in series with the pump.
Back-up operation
One pump is operating continuously. The back-up
pump is operated at intervals to prevent seizing up. If
the duty pump stops due to a fault, the back-up pump
will start automatically.
Pump system:
• Twin-head pump.
• Two single-head pumps connected in parallel. The
pumps must be of equal size and type. Each pump
requires a non-return valve in series with the pump.
Cascade operation
Cascade operation ensures that the pump
performance is automatically adapted to the
consumption by switching pumps on or off. The system
thus runs as energy-efficiently as possible with a
constant pressure and a limited number of pumps.
The back-up of a twin-head pump will start at 90 % and
stop at 30 % performance when operating in constant
pressure mode.
It can be advantageous to choose a twin-head pump,
as the back-up pump will start for a short period in
peak-load situations. If an oversized single-head pump
is chosen, it may run outside its best efficiency range
most of the time.
All pumps in operation will run at equal speed. Pump
changeover is automatic and depends on speed,
operating hours and fault.
Pump system:
• Twin-head pump.
• Two single-head pumps connected in parallel. The
pumps must be of equal size and type. Each pump
requires a non-return valve in series with the pump.
• The control mode must be set to "Const. press." or
"Constant curve".
Readings and settings on the pump
Control panel and display
The MAGNA3 pump features a 4" TFT display with
intuitive and user-friendly interface. The control panel
has self-explanatory push-buttons made of high-quality
silicone for precise navigation in the menu structure.
The control panel is designed to give the user quick
and easy access to pump and performance data on
site.
When the pump is started up for the first time, the user
is presented with a start-up guide enabling easy
setting of the pump. Additionally, the "Assist" menu
can guide the user through the various settings of the
pump.
Fig. 42 Control panel
TM05 3820 1612
Button Function
Goes to the "Home" menu.
Returns to the previous action.
Navigates between main menus, displays and
digits.
When the menu is changed, the display will always
show the top display of the new menu.
Navigates between submenus.
Saves changed values, resets alarms and expands
the value field.