31
When as a result of an increasing water volume the
pressure drops below the pressure set point, one
pump will be switched on. When the required system
pressure has been reached, the pump is switched off.
The minimum run time related switch-off delay is
optimized constantly, which results in a considerable
energy saving.
Table 33: Specific parameter settings Megacontrol
9.9.1 Explanation of parameters
9.9.1.1 Pressure settings set points
Figure 32: Pressure settings set points fixed
speed
Table 34: Pressure settings set points fixed speed
Figure 30: 1 pump operation
Parameter Value
3-3-1 Number of pumps 1
2
3-3-2 Inlet Rainwater
3-3-3 Discharge Fixed Speed
3-4-1-4-11 Water supply control
3-4-1-4-11-1 Level RW-pump Off 90% (B)
1
1. See Figure 31
3-4-1-4-11-2 Level RW-pump On 70% (C)
1
3-4-1-4-11-3 Level DW-valve open 40% (X)
1
3-4-1-4-11-4 Overflow protection On
3-4-1-6 Potable water inlet
3-4-1-6-1 Refresh intervall 336 h
3-4-1-6-2 Force refresh Off
3-4-1-6-3 Refresh duration 10 s
3-4-1-7 Rainwater inlet
3-4-1-7-1 Number of pumps 1
3-4-1-7-2 Max. Pumpstarts 30
3-4-1-7-3 Max. run time 1800 s
3-4-1-7-4 Check run interval 172800
3-4-1-7-5 Check run duration 2
3-5-1 Set point 400 kPa
3-5-3 Bandwidth 30
3-6-2 Min. run time Default 180 s
DOL ≤ 2.2 kW 90 s
3-6-3 Min. run time corr. 10 s
3-6-8 Run-dry delay Float/level control 1
Figure 31: Example level indication
20130231-C
ID Parameter
S 3-5-1 Set point
A 3-5-3 Bandwidth
B Switch-off pressure
C Switch-on pressure
D 2 x bandwidth
S
Pt
AB
B
C
X
Rain water reservoir
Rain water pump(s)
Fs
Booster pump(s)
Discharge
Potable water
S
A
D
C
B
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