Competitive Cross Reference

Applications
UP Series
5
38
Variable-speed pump
The Grundfos variable-speed pump is another product
with fully integrated control. The variable-speed
controller requires a 0-10/2-10 VDC or 0-20/4-20 mA
control signal, which is user-selectable.
If desired, the manual-% dial allows the speed of the
pump to be manually adjusted and set by the user.
The speed of the pump may be manually adjusted
anywhere from min. to 100 %, but once set, remains
fixed at that speed.
In addition, the pump speed may be set as 0-100 % or
15-100 % by user.
The controller also provides pump exercising for
10 seconds every three days and a power-up reset,
which runs the pump for three seconds at full speed,
for all modes of operation.
LEDs on the terminal box indicate operation (power is
applied) and performance (flashing slowly or quickly).
Fig. 5 Variable-speed pump
Variable-speed models include the following items:
• Pump with integrated variable-speed control
• line cord, 6 ft (1.8 m), prewired
• two gaskets.
Variable-speed standard features
• Variable-speed output modulation (external or
manual control)
• offset-dial for fine-tuning of the signal input.
Fig. 6 Family curves for variable-speed pumps
TM03 9088 0513
Signal type Signal range
Voltage 0-10 VDC or 2-10 VDC, 5 mA max.
Current 0-20 mA or 4-20 mA, 5 VDC max.
TM03 8843 0813
Pos. Description
a Min. curve for all models
b Max. UP 15-42 F/VS
c Max. UP 26-64 F/VS
d Max. UP 26-96 F/VS
0 4 8 12 16 20 24 28 32 36
Q [US GPM]
0
4
8
12
16
20
24
28
32
[ft]
H
0 2 4 6
Q [m³/h]
0
2
4
6
8
10
[m]
H
a
d
c
b