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8.7.17 Pump test run (4.2.5)
Fig. 57
Pump test run
Description
This 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 five
seconds.
Setting range
• Time of day
• Day of week
• Include pilot pump
• Include backup pump
Setting via control 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 system is configured with a pilot or a backup pump, select
"Include pilot pump" or "Include backup pump".
Factory setting
The function is disabled.
8.7.18 Pump stop attempt (4.2.7)
Fig. 58
Pump stop attempt
Description
The function makes it possible 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
8.7.19 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 control panel
• Settings > Pump cascade control > Pump stop attempt.
1. Select: Self-learning / Fixed interval.
2. Set "Interval between stop attempts" if you select "Fixed
interval".
3. Select: Enabled.
Factory setting
The function is enabled, and "Self-learning" is selected.
Note
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.
If the backup pump is included in the test run, the
system pressure will be high when the pump is
started.
