Product Overview

0
5
10
15
20
25
30
35
40
0 10 20 30 40 50 60
Head, H (ft)
Flow, Q (GPM)
A
B
A
SHADED AREA IS
OPERATING RANGE
Minimum Speed
B
Maximum Speed
VR3452 with control module
VR3452 without control module
-
Max.
H
Q
Hset
2
+
Hset
+
H
Q
H set
-
Max.
Min.
H
Q
RPM set
Max.
+
-
PROPORTIONAL
PRESSURE
CONSTANT
PRESSURE
FIXED
SPEED
The pump operates at a constant
dierential set pressure (Hset on the
user interface) from zero ow to maximum
speed. Once maximum speed is reached
the dierential pressure drops as ow
increases in a similar manor to a constant
speed pump. Hset range from 4.5’ to 35’
in 0.5’ increments. Factory default is 17.5’
The pump operates at its programmed
speed between 1100 & 4400 RPM as set by
the operator (RPMset on the user interface).
Factory default is max speed (4400 RPM).
The pump operates on a pre-programmed
inclining performance curve where the
dierential pressure increases with ow.
Hset on the user interface relates to the
dierential pressure at maximum speed
with a corresponding dierential pressure
at zero ow of half of the Hset value. Hset
range from 4.5’ to 35’ in 0.5’ increments.
Factory default is 17.5’.
AUTOMATIC MODE (factory setting)
In automatic mode the pump automatically
sets the operating pressure, depending on the
hydraulic system. By doing so, the pump nds
the optimal operating position. This mode is
recommended in most systems.
NIGHT SETBACK TURNDOWN
When the pump operates in night mode, it automatically switches between the selected operating curve in the
mode and night curve. The transition to the night mode depends on the media temperature in the system. When
the night mode is prepared for operating, its icon illuminates and the pump operates in the selected operating curve
of the mode. When the pump identies the media temperature fall by 59-68F° (approximately during 2 hours), the
icon starts to blink and the pump switches to the night curve. When the media temperature rises again, the icon
stops blinking and the pump passes over to the operating curve in the selected operating mode. The night mode
operates only in combination with the above indicated modes. It is not an independent operating mode.
A
VR3452 Performance Data