Grundfos Control MPC Montage- Und Betriebsanleitung Seite 41

8.6.18 Pump test run (4.2.5)
Pump test run
Description
The function is primarily used in situations where the forced pump
changeover is disabled, and/or if the system is set to operating
mode Stop, for instance in a period when the system is not needed.
In such situations, it is important to test the pumps regularly.
Advantages of this function:
• Pumps do not seize up during a long standstill due to deposits
from the pumped liquid.
• The pumped liquid does not decay in the pump.
• Trapped air is removed from the pump.
The pumps start automatically one by one and run for 5 seconds.
Pumps in operating mode Manual are not included in the
test run. If there is an alarm, the test run will not be carried
out.
Setting range
• Time of day
• Day of week
• Include pilot pump
Setting via the operating panel
• Settings > Pump cascade control > Pump test run.
1. Select interval.
2. Set:
• Time of day
• Minutes.
3. Select the day of week if you select Once a week.
4. If the system is configured with a pilot or a backup pump, select
Include pilot pump.
Factory settings
The function is disabled.
8.6.19 Pump stop attempt (4.2.7)
Pump stop attempt
Description
The function allows you to set automatic stop attempts of a
pump when several pumps are running. It ensures that the
optimum number of pumps is always running, in terms of energy
consumption. See section Pump start and stop speed (4.2.8). At the
same time, the purpose is to avoid disturbances in connection with
automatic stop of pumps.
Stop attempts can either take place with a fixed interval set under
Interval between stop attempts or by self-learning. If self-learning
is selected, the interval between stop attempts will be increased if
repeated attempts to stop the pump fail.
Setting via the operating panel
• Settings > Pump cascade control > Pump stop attempt.
1. Select: Self-learning or Fixed interval.
2. Set Interval between stop attempts if you select Fixed
interval.
3. Select: Enabled.
Factory settings
The function is enabled, and Self-learning is selected.
Related information
8.6.20 Pump start and stop speed (4.2.8)
41