Operation, Backup Pump - Grundfos Control MPC Installation And Operating Instructions Manual

8.5.8 Operation, backup pump (2.1.4.8)

Fig. 31 Operation, backup pump
Description
This display is only shown in systems with a backup pump.
It is possible to set the operating mode, start delay and stop limit
for the pump.
The function is only available in pressure-boosting applications.
Setting range
Auto
It is possible to set a start delay. The backup pump will start after
the delay set if the main pumps are running at 100 % speed and
cannot maintain the setpoint.
Two stop parameters can be selected for the backup pump:
• Max. pressure limit
– The backup pump will be stopped if the pressure exceeds
the limit set.
• Number of main pumps stopped
– The backup pump will be stopped when the set number of
main pumps have stopped.
Manual
Max., Min., Normal, Stop.
Setting via control panel
• Operation > Individual pump control.
1. Select backup pump.
2. Select: Auto / Manual.
Auto
1. Set:
• Start delay
• Stop conditions.
Manual
1. Select operating mode.
2. Set the setpoint if you select "Normal".
Factory setting
Start delay (auto): 2 minutes.
Stop limit: 5 bar.
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