Grundfos CUE Series Product Guide

Functions
Grundfos CUE
16
Constant pressure with stop function
The outlet pressure is kept constant at high flow rate.
On/off operation at low flow rate. See fig. 8.
Fig. 8 Constant pressure with stop function
The pump is controlled according to a constant pres-
sure measured after the pump. This means that the
pump off
ers a constant pressure in the Q-range of Q
min
to Q
max.
, represented by the horizontal line in the QH
diagram.
Constant level
The liquid level is kept constant, independently of the
flow rate. See fig. 9.
Fig. 9 Constant level
The pump is controlled according to a constant liquid
level. This means that the pump offers a constant level
in the Q-range of Q
min.
to Q
max.
, represented by the
parable line in the QH diagram.
The function is default an emptying function.
Constant level with stop function
The liquid level is kept constant at high flow rate. On/off
operation at low flow rate. See fig. 10.
Fig. 10 Constant level with stop function
The pump is controlled according to a constant liquid
level. This means that the pump offers a constant level
in the Q-range of Q
min.
to Q
max.
, represented by the
parable line in the QH diagram.
The function is default an emptying function.
Constant flow rate
The flow rate is kept constant, independently of the
head. See fig. 11.
Fig. 11 Constant flow rate
The pump is controlled according to a constant flow
rate, represented by the vertical line in the QH diagram.
TM03 8477 1607 TM03 8807 2507
TM03 8482 1607 TM03 8808 2607
Q
max.
Q
min.
H
set
P
CUE
Q
max
Q
min
L
CUE
TM03 8482 1607 TM03 8809 2607
TM03 8478 1607 TM03 8810 2507
Q
max.
Q
min
L
CUE
Q
max
Q
min
CUE
Q

Grundfos CUE Series Specifications

General

Category	DC Drives
Output Voltage	24 V DC
Control Signal	0-10 V, 4-20 mA
Communication	Modbus RTU
Protection Features	Overvoltage, overcurrent, overtemperature, short circuit
Humidity	5% to 95% (non-condensing)
Enclosure class	IP20
Enclosure Rating	IP20