Xylem HYDROVAR Smart - Manual (Page 32)

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7.21.4 Switch Interval
SWITCH INTERVAL
12 hours
For changing the master pump and follow-up pump in
order to achieve even operating hours of the pumps
Adjustable between 1 hour and 100 hours. If it is set higher than 100 hours, the
automatic changeover is deactivated).
Manual change of master pump in the 1 st display with the Ï-button.
Press ¾ on the Hydrovar-Smart to change to
7.21.5 Source of required value
SOURCE REQ. VALUE
OFF
for selecting the pump address of the source of the
required value.
Five settings are possible:
OFF, ADR1,ADR2, ADR3 and ADR4. If an additional input (INT or EXT-ADC-I or EXT-ADC-
U) is active, you must select the address where this input is connected.
When Multicontroller or Synch. Controller is active, the actual active value is shown in
brackets in the middle of the display. If the sign “#” is shown in the second line of the
display, the pump will work with a required value from another pump in the multipump
system. On the pump, which is the source of the required value, there is no “#” shown.
Press ¾ on the Hydrovar-Smart to change to
7.21.6 Synchronous Control
If the synchronous control is active the activated pumps try to control the set pressure
together (all pumps run at the same frequency). The 2
nd pump starts, when the 1 st pump
reaches the release frequency (ENABLE SEQ. CONTR.) The pumps will now maintain
constant pressure by running synchronously. The follow-up pump will stop, when both
pumps together run below the set SYNCHRON. LIMIT. This creates the hysteresis effect.
S U B M E N U
Synch. Control
Press ¾ for about 3 seconds to enter the
submenu and the display changes to
7.21.6.1 Synchronous Limit
SYNCHRON. LIMIT
0,0 Hz
Frequency threshold adjustable between 0,0 Hz and
the set maximum frequency.
Switch off threshold of the first follow-up pump. The switch off thresholds of the other
pumps are each higher by the SYNCHRON-WINDOW.
This parameter is also used for the stop value for the external constant speed pump at
activated Simple Multicontroller in the parameter configuration relay.
Press ¾ on the Hydrovar-Smart to change to