Grundfos Endsuction close coupled multistage CME 1-4 A-R-A-E-AVBE U-A-D-N

Compact, reliable, horizontal, multistage, end-suction centrifugal pump with axial suction port and radial discharge
port. The shaft, impellers and chambers are made of stainless steel. The inlet and discharge parts are made of cast
iron. The mechanical shaft seal is a special designed, unbalanced O-ring seal. Pipework connection is via internal
Whitworth pipe threads, Rp (ISO 7/1).
The pump is fitted with a 1-phase, fan-cooled, permanent-magnet, synchronous motor. The motor efficiency is
classified as IE5 in accordance with IEC 60034-30-2.
The motor includes a frequency converter and PI controller in the motor terminal box. This enables continuously
variable control of the motor speed, which again enables adaptation of the performance to a given requirement.
An operating panel on the motor terminal box enables setting of required setpoint as well as setting of pump to “Min.”
or “Max.” operation or to “Stop”. The Grundfos Eye indicator on the operating panel provides visual indication of
pump status:
• “Power on”: Motor is running (rotating green indicator lights) or not running (permanently green indicator lights)
• “Warning”: Motor is still running (rotating yellow indicator lights) or has stopped (permanently yellow indicator
lights)
• “Alarm”: Motor has stopped (flashing red indicator lights).
Communication with the pump is possible by means of Grundfos GO Remote (accessory). The remote control
enables further settings as well as reading out of a number of parameters such as “Actual value”, “Speed”, “Power
input” and total “Power consumption”.
The terminal box holds terminals for these connections:
• one dedicated digital input
• two analog inputs, 0(4)-20 mA, 0-5 V, 0-10 V, 0.5 – 3.5 V
• 5 V voltage supply to potentiometer and sensor
• one configurable digital input or open-collector output
• Grundfos Digital Sensor input and output
• 24 V voltage supply for sensors
• two signal-relay outputs (potential-free contacts)
• GENIbus connection
• interface for Grundfos CIM fieldbus module.
Further product details
Pump and motor are integrated in a compact and user-friendly design. The pump is fitted to a low base plate, making
it ideal for installation in systems where compactness is important.
The state-of-the-art design and materials of the shaft seal ensure high wear resistance, improved sticking and
dry-running capabilities and long operating life.
Servicing the pump requires no special service tools. Service parts are in stock for quick delivery and are available as
kits, single parts or bulk. Service videos are available on www.youtube.com.
Frequency converter operation offers these functions:
controlled operation, i.e. consumption flucturates–
constant pressure
communication with the pump.
energy savings
Adaption of performance through frequency-controlled speed offers obvious benefits such as:–
increased comfort
control and monitoring of the application and pump performance.
An operating panel on the motor terminal box enables setting of required setpoint as well as setting of pump to “Min.”
or “Max.” operation or to “Stop”. The Grundfos Eye indicator on the operating panel provides visual indication of
pump status:
• “Power on”: Motor is running (rotating green indicator lights) or not running (permanently green indicator lights)
• “Warning”: Motor is still running (rotating yellow indicator lights) or has stopped (permanently yellow indicator
lights)
• “Alarm”: Motor has stopped (flashing red indicator lights).
Communication with the pump is possible by means of Grundfos GO Remote (accessory). The remote control
enables further settings as well as reading out of a number of parameters such as “Actual value”, “Speed”, “Power
input” and total “Power consumption”.
Pump
A combination of a stop ring and a Nord-lock® washer secures a tight and reliable fixation of the impeller spacing
pipes to the splined pump shaft. It is possible to remove and fit the hydraulic parts from the pump side. The inlet part,
chambers and discharge part are hold together by four staybolts. The pump is fitted with an unbalanced O-ring seal with a rigid torque-transmission system. It has a fixed seal driver
ensuring a reliable rotation of all parts. The dynamic secondary seal is an O-ring.
Seal faces:
• Rotating seal ring material: aluminium oxide (alumina)
• Stationary seat material: carbon graphite, resin-impregnated
Carbon graphite against alumina is a good all-round seal for not too demanding applications. The corrosion
resistance is often limited in water to a range between pH 5 and pH 10. Usage in liquids above 90 °C is not
recommended. The seal can handle dry-running conditions for short periods.
Secondary seal material: EPDM (ethylene-propylene rubber)
EPDM has excellent resistance to hot water. EPDM is not suitable for mineral oils.
The pump shaft is connected to the motor shaft through a left thread and tight fit. The shaft cannot be dismantled.
Motor
The motor is a totally enclosed, fan-cooled motor with principal dimensions to EN 50347. Electrical tolerances comply
with EN 60034.
The motor efficiency is classified as IE5 in accordance with IEC 60034-30-2.
The motor requires no external motor protection. The motor control unit incorporates protection against slow- and
quick-rising temperatures, e.g. constant overload and stalled conditions.
The terminal box holds terminals for these connections:
• one dedicated digital input
• two analog inputs, 0(4)-20 mA, 0-5 V, 0-10 V, 0.5 – 3.5 V
• 5 V voltage supply to potentiometer and sensor
• one configurable digital input or open-collector output
• Grundfos Digital Sensor input and output
• 24 V voltage supply for sensors
• two signal-relay outputs (potential-free contacts)
• GENIbus connection
• interface for Grundfos CIM fieldbus module.