Product Overview

BMQE
Domestic water supply
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2. BMQE
Product introduction
The BMQE Constant Pressure System maintains
constant water pressure under varying demand, even
with multiple taps running. The BMQE is a complete
pressure boosting system that includes:
• pump
• controller
•tank
• mounting brackets
• pressure sensor.
Fig. 4 Grundfos BMQE Constant Pressure System
High-quality construction and rugged design ensure
low maintenance and trouble-free operation. The
system is based on the time-tested technology of the
Grundfos SQE constant pressure system (for
submersible applications).
The pump's MSE 3 motor incorporates solid state
electronics and permanent magnet motors which
account for high motor efficiencies.
Variable speed is offered though frequency control via
the CU 301 remote status box. The system can be set
to operate at any duty point in the range between
minimum and maximum performance of the pump.
The BMQE has built in safeties in the solid state
electronics. The small footprint of the pump allows the
system to be positioned either vertically or horizontally
depending upon the application. Refer to the BMQE
(previously EZ Boost) pages on our web site at
www.grundfos.us.
Applications
The BMQE Constant Pressure System is suitable for:
• condos
• restaurants
• homes
• irrigation
•offices
• grocery applications
• many other boosting applications.
Pumped liquids
The BMQE Constant Pressure System is suitable for
pumping water or other clean, thin, non-aggressive
liquids not containing solid particles or fibers.
Features and benefits
With the Grundfos BMQE Constant Pressure System,
constant pressure is as simple as a touch of a button
on the accompanying CU 301 control unit.
Features
• Quick and easy installation
• ready-to-use system requires minimal space
• high user convenience (constant pressure
regardless of consumption)
• easily adjustable pressure level with push button
control
• continuous control and monitoring of pump
operation
• integrated dry-running protection
• integrated overload protection
• integrated protection against over-voltage and
under-voltage
• soft start feature.
Benefits
The BMQE Constant Pressure System automatically
balances water surges and equalizes flow and
pressure according to consumption.
In other words, the system maintains a constant water
pressure despite varying consumption.
The pressure is registered by means of a pressure
sensor and transmitted to the controller. The controller
adjusts the BMQE pump performance accordingly.
How the system functions
When a tap is opened, the pressure in the tank will
start to drop. The system maintains a constant
pressure within the maximum pump performance
despite varying water consumption.
The pressure is registered by means of the pressure
sensor, which transmits a signal to the controller. The
controller adjusts the pump performance accordingly to
maintain constant pressure by changing the pump
speed.
At low flow the pressure will drop slowly. When the
pressure in the tank is 7 psi below the setpoint, the
pump will start. When the pressure is 7 psi above the
setpoint, the pump will stop.
Even though the BMQE controller is controlling the
pressure within + / - 3 psi, larger pressure variations
may occur in the system.
TM04 9387 4010