Multi-Pump Setup" ("Setup Of Multi-Pump System") - Grundfos CRE Notice D'installation Et De Fonctionnement

7.44 "Multi-pump setup" ("Setup of multi-pump
system")
Pump variant
("Setup of multi-pump system")
CME
CRE, CRIE, CRNE, CRKE,
SPKE, MTRE
The multipump function enables the control of two pumps
connected in parallel without the use of external controllers. The
pumps in a multipump system communicate with each other via
the wireless GENIair connection or the wired GENI connection.
You can set a multipump system via the master pump, that is the
first selected pump.
If two pumps in the system are configured with an outlet-pressure
sensor, they can all function as master pumps and take over the
master pump function if the other should fail. This provides
additional redundancy in the multipump system.
The multipump functions are described in the following sections.
7.44.1 "Alternating operation"
Alternating operation functions as a duty/standby operating mode
and is possible with two pumps of same size and type connected
in parallel. The main purpose of the function is to ensure an even
amount of running hours and to ensure that the standby pump
starts if the duty pump stops due to an alarm.
Each pump requires a non-return valve in series with the pump.
You can choose between two alternating operation modes:
• "Alternating operation, time"
Change from one pump to the other is based on time.
• "Alternating operation, energy"
Change from one pump to the other is based on energy
consumption.
If the duty pump fails, the other pump starts.
7.44.2 "Backup operation"
Backup operation is possible with two pumps of same size and
type connected in parallel. Each pump requires a non-return
valve in series with the pump.
One pump is operating continuously. The backup pump is
operated for a short time each day to prevent seizing up. If the
duty pump stops due to a fault, the backup pump starts.
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"Multi-pump setup"
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7.44.3 Setting up a multipump system
You can set a multipump system in the following ways:
• Grundfos GO and wireless pump connection
• Grundfos GO and wired pump connection
• Advanced control panel and wireless pump connection
• Advanced control panel and wired pump connection
See step-by-step descriptions below.
Grundfos GO and wireless pump connection
1. Power on both pumps.
2. Establish contact to one of the pumps with Grundfos GO.
3. Set the needed analog and digital inputs via Grundfos GO
according to the connected equipment and the required
functionality. See section 7.41 "Assisted pump
4. Assign a pump name to the pump using Grundfos GO. See
section 7.35 "Pump name".
5. Disconnect Grundfos GO from the pump.
6. Establish contact to the other pump.
7. Set the needed analog and digital inputs via Grundfos GO
according to the connected equipment and the required
functionality. See section 7.41 "Assisted pump
8. Assign a pump name to the pump using Grundfos GO. See
section 7.35 "Pump name".
9. Select the "Assist" menu and choose "Setup of multi-pump
system".
10. Select the desired multipump function. See section
7.44.1 "Alternating operation"
above.
11. Press [>] to continue.
12. Set the time for pump changeover, that is the time at which
the alternation between the two pumps is to take place.
This step applies only if you have selected
"Alternating operation, time" and if the motors are
fitted with FM 300.
13. Press [>] to continue.
14. Select "Radio" as the communication method to be used
between the two pumps.
15. Press [>] to continue.
16. Press "Select pump 2".
17. Select the pump from the list.
Use the [OK] or
18. Press [>] to continue.
19. Confirm the setting by pressing [Send].
20. Press [Finish] in the "Setup complete" dialog box.
21. Wait for the green indicator light in the middle of Grundfos Eye
to light up.
setup".
setup".
and 7.44.2 "Backup operation"
button to identify the pump.