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English (US)
4.3 Applications
4.3.1 Pumped liquids
Grundfos Variable Speed pumps are designed to
pump liquids compatible with their cast iron
pump housing construction. They are
recommended for use in closed hydronic
systems.
4.4 Features and benefits
•
All minimum and maximum settings are
operating, not safety limits.
Necessary auxiliary equipment and safety
devices must be added.
•
"Offset %" dial provides fine-tuning for input
signal.
•
"Manual %" dial provides manual speed
control.
•
Signal range is selected through dip
switch A.
•
Type of signal used is selected through dip
switch B.
•
Minimum speed at 0 or 15 % is selected
through dip switch C.
•
Speed control from external signal or
"Manual %" dial is selected through dip
switch D.
•
Pump exercising:
After every three days of no operation,
the controller will exercise the pump for
10 seconds. The "% Out" LED will be on
during exercising.
•
As variable speed output modulates, the
"% Out" LED will flash at speeds varying
from ON for 0.25 seconds and OFF for
0.25 seconds up to ON for 2.5 seconds and
OFF for 2.5 seconds.
•
The output % will be 100 % for 3 seconds
after power is applied. This is the same for
all modes of operation.
See figs
to
5. Operating conditions
5.1 Control signal input range options
Voltage signal range: 0-10 V(DC) or 2-10 V(DC)
Current signal range: 0-20 mA or 4-20 mA.
5.1.1 UP 15-42 F/VS, 115 V 60 Hz
Maximum liquid temperature:
•
205 °F (96 °C)
Maximum ambient temperature:
•
107 °F (42 °C) with control module vertical
(see fig.
•
105 °F (41 °C) with control module on top of
pump and horizontal (see fig.
Maximum working pressure:
•
145 psi (10 bar)
Minimum inlet pressure:
•
5 psi (0.34 bar).
5.1.2 UP 26-96 F/VS, 115 V 60 Hz and
UP 26-64 F/VS, 115 V 60 Hz
Maximum liquid temperature:
•
195 °F (90 °C)
Maximum ambient temperature:
•
105 °F (40 °C) with control module vertical
(see fig.
•
92 °F (33 °C) with control module on top of
pump and horizontal (see fig.
Maximum working pressure:
•
145 psi (10 bar)
Minimum inlet pressure:
•
5 psi (0.34 bar).
Caution
Grundfos Variable Speed pumps
are for indoor use only.
Caution
Grundfos Variable Speed pumps
are intended for use with water,
or a 50/50 mixture by weight of
propylene glycol.
