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EZ BOOST SYSTEM
Introduction
There are many applications within water supply where it
is necessary to increase the system pressure. The Grundfos
EZ Boost system is the optimum solution for applications
requiring:
• Sealless pumps
• Quiet operation and/or
• Maintenance-free operation.
The EZ Boost system offers the following features:
• Dry-running protection
• High efficiency of pump and motor
• Excellent wear resistance
• Soft starter
• Over voltage and under voltage protection
• Overload protection
• Over temperature protection.
• Variable speed
• Electronic control and communication.
Applications
• Pressure boosting.
• Water treatment.
Pumped liquids
Thin, non-explosive liquids not containing abrasive par-
ticles or fibers. The liquid must not be able to attack the
pump materials chemically or mechanically.
Should the density and/or viscosity of the pumped liquid
exceed the density and/or viscosity of water, please con-
tact Grundfos.
BMQE Pump
The pumps used for The Grundfos EZ Boost system are
modified SQE submersible pumps. The EZ Boost BMQE
pump is an SQE pump with an MSE 3 motor. Pump and
motor are centered in the 4” stainless steel sleeve.
BMQE pumps are suitable for both continuous and
intermittent operation for a variety of pressure boosting
applications.
BMQE Motor
The MSE 3 motors are based on state-of-the-art technology
within permanent magnets (PM motor), which accounts
for the high motor efficiencies. In addition, the motors
have a built-in electronic unit with a frequency converter
for variable frequency and soft starting.
Product Guide
EZ Boost
TM
System
The MSE 3 motors features high efficiency within a wide
load range. The high and flat efficiency curve of the PM
motor enables the same motor to cover a wide power
range as opposed to conventional AC motors. For BMQE
pumps, this means fewer motor variants.
EZ Boost Controller
The BMQE pump features variable speed which is offered
through frequency control via the EZ Boost controller. As a
consequence, the pump can be set to operate in any duty
point in the range between the minimum and maximum
performance curves of the pump. Each BMQE pump must
be connected to its own EZ Boost controller.
It is also possible to operate the BMQE without an EZ Boost
controller, though the features offered will be fewer.
Operating conditions
Flow:
Max. 39 US GPM (8.9 m3/h)
Head:
Max. 300 ft (91.4 m)
Temperature:
Max. 95°F (35°C)
Operating pressure:
Max. 145 PSI (10 bar)
Inlet pressure:
Min. 8 PSI (0.55 bar)
Sound-pressure level: The sound pressure level of the
BMQE is lower than 74 db[A] at a
distance of 3 feet (1 meter).
It is recommended by Grundfos that the pump be installed
with sound and vibration dampening equipment such
as flexible piping adapters and anti-vibration mounting.
The pump should not be mounted in or adjacent to living
quarters. The pump can also be wrapped with sound-
proofing insulation to reduce noise (see page 16, EZ Boost
System Diagram).
BMQE Pump Sectional Drawing
Pos.
1. Sleeve
5. SQE pump
2. Discharge connection
6. Cable entry
3. Suction connection
7. Centering device
4. MSE 3 motor
8. Air vent screw
6
2
5
4
7
3
1
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