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Grundfos Geo-Flo MAGNA3 - Page 18

Grundfos Geo-Flo MAGNA3
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18
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL
Multi-Pump Setup
4. Verify the pump function by selecting Pump Identification from the Status menu. See examples below.
5. Disconnect power to the primary pump and remove the grey start/stop jumper. Connect the S/S and ground wires refer to wiring
section after complete turn power back on to the primary pump. DO NOT remove the grey start/stop jump from the secondary
pump. NOTE: The secondary pump will not operate if the grey start/stop jumper is not installed. Replace the pump front cover.
Start the system, and check for proper operation. Record temperatures and flow rates as appropriate.
IMPORTANT: Step 8 (not shown) will start the pumps. If the
start/stop jumper is removed, Step 8 will be skipped.
Example screen for pump 1
Example screen for pump 2
Figure 16: Default home screen for
MAGNA3 insulated pumps
IMPORTANT NOTE: Figure 16 shows the home screen default data. The home
screen can show up to four panels of data. It is not recommend that flow rate (in
gpm) is used as one of the four panels. The MAGNA3 does not use a flow sensor; it
“estimates” flow, which can be misleading, especially when setting up the pump for
constant pressure mode. Verification of system flow rate should be done by checking
pressure drop at each of the heat pumps.

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