Grundfos BoosterpaQ PFU 2000 - BoosterpaQ System Types Description

Grundfos BoosterpaQ ME Grundfos BoosterpaQ MEH Grundfos BoosterpaQ MES
Example:
Three pumps of equal
size with MLE motors
and a diaphragm tank.
One pump
in operation.
Three pumps
in operation.
Grundfos BoosterpaQ ME maintains a con-
stant pressure through continuous variable
adjustment of the speed of the pumps. The
system performance is adjusted to the demand
through cutting in/out the required number of
pumps and through parallel speed control of the
pumps in operation. Pump rotation is automatic
and depends on load, time and fault.
PFU 2000
MLE MLE MLE
Example:
Two half-size pumps
with MLE motors, one
mains-operated full-size
pump and a diaphragm
tank.
One half-size
pump with
MLE motor in
operation.
One full-size
pump and one
half-size pump
with MLE
motors in
operation.
Grundfos BoosterpaQ MEH maintains a con-
stant pressure through continuous variable
and parallel adjustment of the speed of the
two half-size pumps, while the full-size pump
is mains-operated. The half-size pumps always
start first. If the pressure cannot be maintained
by one half-size pump, the second half-size
pump and/or the full-size pump will be cut in.
Pump rotation is automatic and depends on
load, time and fault.
PFU 2000
MLE MLE
Q
H
set
H
Q
H
set
H
Product Description
Example:
One pump with MLE
motor, two mains-
operated pumps and
a diaphragm tank.
All pumps are of
equal size.
One pump
with MLE
motor in
operation.
One pump with
MLE motor in
operation and
two pumps
on mains-
operation.
Grundfos BoosterpaQ MES maintains a con-
stant pressure through continuous variable
adjustment of the speed of one pump. The
other pumps are cut in/out on mains opera-
tion according to demand thus achieving a
performance corresponding to consumption.
The pump with MLE motor will always start
first. Rotation among the pumps on mains
operation is automatic and depends on load,
time and fault.
PFU 2000
MLE
Q
H
set
H
Q
H
set
H
Q
H
set
H
Q
H
set
H
Grundfos BoosterpaQ MF Grundfos BoosterpaQ MFH Grundfos BoosterpaQ MS
Example:
Four pumps and a
diaphragm tank. All
pumps are of equal
size.
One pump
in operation
via variable
frequency
drive.
One pump
in operation
via variable
frequency
drive and
two pumps
on mains
operation.
Grundfos BoosterpaQ MF maintains a constant
pressure through continuous variable adjust-
ment of the speed of one pump. The other
pumps are mains-operated (on/off) according
to the demand thus achieving a system size
corresponding to the consumption. The pump
controlled by the variable frequency drive will
always start first. Pump rotation is automatic
and depends on load, time and fault. All pumps
are controlled by the variable frequency drive in
rotation.
PFU 2000
Example:
Two half-size pumps,
two full-size pumps,
and a diaphragm tank.
One half-size
pump in oper-
ation via variable
frequency drive.
One full-size
pump in oper-
ation via variable
frequency drive
and one full-
size pump on
mains operation.
Grundfos BoosterpaQ MFH maintains a con-
stant pressure through continuous variable
adjustment of the speed of the one half-size
pump. The rest of the pumps are mains-operat-
ed. A half-size pump controlled by the variable
frequency drive will always start first. If the
pressure cannot be maintained by one half-size
pump, the second half-size pump and/or the
full-size pump will be cut in on mains-opera-
tion. Rotation between the half-size pumps is
automatic and depends on load, time and fault.
The full-size pumps on mains power are auto-
matically rotated among themselves.
PFU 2000
Q
H
set
H
set
H
Q
H
Example:
Four pumps and
a diaphragm tank.
All pumps are of
equal size.
One pump
in opera-
tion.
Three
pumps in
operation.
Grundfos BoosterpaQ MS maintains a pressure
range by cutting in/out the required number
of pumps. The operating range of the pumps
will lie between the lines Hset and Hstop (cut-
out pressure). The cut-out pressure cannot be
set but is calculated automatically. Rotation
among the pumps is automatic and depends
on load, time, and fault.
PFU 2000
Q
stop
set
H
H
H
Q
stop
set
H
H
H
Q
set
H
H
Q
set
H
H
Q
H
set
H
set
H
Q
H
Example:
One half-size
pump, three full-
size pumps and a
diaphragm tank.
Grundfos BoosterpaQ MSH
PFU 2000
Q
stop
set
H
H
H
Q
stop
set
H
H
H
Example:
One half-size
pump in
operation.
Q
stop
set
H
H
H
Q
stop
set
H
H
H
Example:
One half-size
pump and
one full-size
pump in
operation.
Grundfos BoosterpaQ MSH maintains a pressure range by cutting in/out the half-size pump and the full-size pumps. The half-size pump will always
start first. The half-size pump will be cut out again when a full-size pump is cut in. The operating range of the pumps will lie between the lines Hset
and Hstop (cut-out pressure). The cut-out pressure cannot be set but is calculated automatically. Rotation among the full-size pumps is automatic and
depends on load, time and fault.
5
BpaQ IO INDD.indd 1/28/2005, 11:01 AM5