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MAGNA3 INSULATED PUMPS INSTALLATION MANUAL
Multi-Pump Setup
1. For two pumps in parallel with check valves, choose a mulit-pump control mode from the choices below. The multi-pump function
enables the control of single-head pumps connected in parallel and without the use of external controllers. The pumps in a multi-
pump system communicate with each other via the wireless Grundfos GENIair connection. A multi-pump system is set up via a
selected pump, i.e. the primary pump (first selected pump).
A. 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:
• Two single-head pumps connected in parallel.
• The pumps must be of same type and size.
B. 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:
• Two single-head pumps connected in parallel.
• The pumps must be of same type and size.
C. 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. All pumps in operation will run at equal speed. Pump changeover is automatic and depends on speed,
operating hours and fault.
Pump system:
• Two single-head pumps connected in parallel. The pumps must be of same type and size.
• The control mode must be set to “Constant Pressure” or “Constant Curve”.
2. In the Assist menu, scroll down to Multi-pump setup, and follow the screens below to select pump operation. NOTE: This step
must be completed for each pump (through Step 2 of 9) before continuing to the pump search screen (step 3 of 9).
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