Setpoint Ramp (4.1.9); Tank Filling (4.1.10) - Grundfos Control DDD Montage- Und Betriebsanleitung

8.7.10 Setpoint ramp (4.1.9)

Fig. 57 Setpoint ramp
Description
When this function is enabled, setpoint changes are affected by
the setpoint ramp, and the setpoint changes gradually over a
period of time.
"Proportional pressure" or "Setpoint influence" are not affected by
this function.
You can activate the "Accelerate below pressure limit" function to
ensure an easy startup and to reduce the risk of too low pressure
periods. This function is optional.
Setting range
You can enable the "Setpoint ramp" function, and you can set
"Max. change per minute".
"Acceleration factor" allows for multiplication of the "Max. change
per minute" value. This reduces the time the pressure is below
the setpoint. The function is active as long as the pressure is
below "Resulting pressure limit".
Setting via operating panel
• Settings > Primary controller > Setpoint ramp.
1. Select: Enabled.
2. Set: Max. change per minute.
Optional
1. Activate: "Accelerate below pressure limit".
2. Set: "Acceleration factor".
3. Set: "Pressure limit % of setpoint".
4. Verify that the "Resulting pressure limit" is as requested.
Factory setting
The function is disabled.

8.7.11 Tank filling (4.1.10)

Fig. 58 Tank filling
Description
This function makes it possible to use intelligent level control for
tank filling applications. The intelligent level control works by
keeping a constant level in the tank, typically between h
h . This results in a more constant pressure in the pipes to the
min
tank and fewer start/stops compared to a traditional start/stop
system.
The basic information about the tank, such as height, maximum
and minimum level, rinse level and water change level needs to
be entered in order for the level control to work.
1
2
3
4
Fig. 59 Water tower
Pos. Description
1 Overflow elevation: tank overflow protection area
2 Operating storage: tank operating area
3 Emergency and/or fire storage: emergency area
4 Dead storage: tank area that are normally not used
5 Rinse level (htop)
6 Max. level (hmax)
7 Min. level (hmin)
8 Water change level
Setting range
• Tank height
• Rinse level (htop)
• Max. level (hmax)
• Min. level (hmin)
• Water change level.
and
max
5
6
7
8
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