EZ BOOST SYSTEM
Introduction
Therearemanyapplicationswithinwatersupplywhereit
isnecessarytoincreasethesystempressure.TheGrundfos
EZBoostsystemistheoptimumsolutionforapplications
requiring:
•Seallesspumps
•Quietoperationand/or
•Maintenance-freeoperation.
TheEZBoostsystemoffersthefollowingfeatures:
•Dry-runningprotection
•Highefficiencyofpumpandmotor
•Excellentwearresistance
•Softstarter
•Overvoltageandundervoltageprotection
•Overloadprotection
•Overtemperatureprotection.
•Variablespeed
•Electroniccontrolandcommunication.
Applications
•Pressureboosting.
•Watertreatment.
Pumped liquids
Thin, non-explosive liquids not containing abrasive par-
ticlesor fibers. The liquidmust not be ableto attack the
pumpmaterialschemicallyormechanically.
Shouldthedensityand/orviscosity of thepumpedliquid
exceedthe density and/or viscosityof water, please con-
tactGrundfos.
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
motorarecenteredinthe4”stainlesssteelsleeve.
BMQEpumpsaresuitableforbothcontinuousandinter-
mittentoperationforavarietyofpressureboostingappli-
cations.
BMQE Motor
TheMSE3motorsarebasedonstate-of-the-arttechnology
within permanent magnets (PM motor), which accounts
for the high motor efficiencies. In addition, the motors
haveabuilt-inelectronicunitwithafrequencyconverter
forvariablefrequencyandsoftstarting.
Product Guide EZ Boost
TM
System
TheMSE 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,thismeansfewermotorvariants.
EZ Boost Controller
TheBMQEpumpfeaturesvariablespeedwhichisoffered
throughfrequencycontrolviatheEZBoostcontroller.Asa
consequence,thepumpcanbesettooperateinanyduty
pointintherangebetweentheminimumandmaximum
performancecurvesofthepump.EachBMQEpumpmust
beconnectedtoitsownEZBoostcontroller.
ItisalsopossibletooperatetheBMQEwithoutanEZBoost
controller,thoughthefeaturesofferedwillbefewer.
Operating conditions
Flow: Max.39USGPM(8.9m3/h)
Head: Max.300ft(91.4m)
Temperature: Max.95°F(35°C)
Operatingpressure: Max.347PSI(23bar)
Inletpressure: Min.8PSI(0.55bar)
Sound-pressurelevel: Thesoundpressurelevelofthe
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 quar-
ters. 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. SQEpump
2. Dischargeconnection 6. Cableentry
3. Suctionconnection 7. Centeringdevice
4. MSE3motor 8. Airventscrew