Xylem HYDROVAR Smart - Manual (Page 31)

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Press ¾ on the Hydrovar-Smart to change to
7.21.2 Fall Value
For calculation of the set pressure after start of pumps 2 to 4
ACTU. VALUE DEC.
0.15 BAR
Adjustable from 0,0 to pre-selected Sensor range
determines the start-value of the 2
nd pump and the
other following pumps.
(Start-Value = REQUIRED VALUE –ACT. VALUE DEC.)
Press ¾ on the Hydrovar-Smart to change to
7.21.3 Release frequency of the following controller
ENABLE SEQ. CTL.
48.0 Hz
Release of the follow-up pump only when the start-
value
is reached and the lead
Pump has reached the programmed frequency (Adjustable from 0.0 Hz to 70 Hz)
If you do not want to start a following pump this value has to be set higher than the
maximum frequency.
This parameter is also used to start a constant speed pump (when Simple Multicontr. is
set). When this frequency level is reached, the potential free contact of the relay X2/5 –
X2/6 will be closed.
Press ¾ on the Hydrovar-Smart to change to