Submenu Sequence Control; Lift Value - Xylem HYDROVAR Smart Manuel Opérateur

7.21 Submenu Sequence control

S U B M E N U
Seq. Control
Programming of the Multipump Operation:
Up to four pumps can be connected using the integrated RS-485 interface, by connecting
the terminals /1, /2 and /3 of the terminal blocks X5 or X6 of each pump together).
However, the following additional programming must be carried out in the submenu:
Press for about 3 seconds to enter the submenu and the display changes to

7.21.1 Lift Value

ACTU. VALUE INC.
0.35 Bar
Operation of the start of the slave pump:
1) Pump 1 reaches ENABLE SEQ. CONTROL (maximum speed)
2) Pressure falls and reaches the start-value of the 2
(= REQUIRED VALUE – ACTU. VALUE DEC.)
3) Pump 2 is switched on automatically
4) The required value is calculated new, after the start of the 2
following way!
New required value = REQUIRED VALUE – ACTU. VALUE DEC. + ACU. VALUE INC.
Generally:
k ... Number of active pumps (k >1)
p = p
• Lift value = Fall value ⇒ Pressure constant when pumps switch on
• Lift value > Fall value ⇒ Pressure rises when lag-pump switches on
• Lift value < Fall value ⇒ Pressure falls when lag-pump switches on
Adjustable between 0.0 to the pre-selected
Sensor range
+ (k-1)*[lift value – fall value]
set
30
nd
pump
nd pump in the