CUE is a series of external frequency converters especially RFI filters designed for pumps. Output filters Thanks to the startup guide in the CUE, the installer can quickly Operating modes set central parameters and put the CUE into operation. Control modes...
3.4.1 Reduction at low air pressure • The on/off button of the control panel does not disconnect the CUE from the power supply and must therefore not be used as Warning a safety switch. At altitudes above 2000 m, the PELV requirements •...
CAUTION: 5.2.1 Lifting the CUE SEE MANUAL / VOIR MANUEL Always lift the CUE using the lifting holes. Use a bar to avoid WARNING: bending the lifting holes. See fig. 2. STORED CHARGE DO NOT TOUCH UNTIL...
Min. 225 2. Drill the holes. See fig. 5. 3. Fit the screws at the bottom, but leave loose. Lift the CUE up on the screws. Move the CUE against the wall, and fit the screws at the top. Tighten all four screws. See fig. 2.
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See the pedestal kit instructions for further Note information. By means of a pedestal (option), the CUE can also be mounted on the floor. 1. Mark the mounting holes on the floor. See fig. 6. 2. Drill the holes.
The circuit breaker is type B. The total leakage current of all the electrical equipment in the installation must be taken into account. The leakage current of the CUE in normal operation can be seen in section 16.7.1 Mains supply (L1, L2, L3).
6.2.3 Gland plate Cables are connected through the gland plate from the bottom. The gland plate must be fitted to the CUE to ensure the specified protection degree as well as to ensure sufficient cooling. Drill holes in the marked areas. See fig. 10.
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6.3.2 Wiring diagram, signal terminals Terminals 0/4-20 mA 0-10 V Terminals External setpoint, External setpoint, current input voltage input U: 0-10 V U: 0-10 V I: 0/4-20 mA I: 0/4-20 mA 0/4-20 mA Terminals Two-wire sensor 0/4-20 mA Terminals Three-wire sensor U: 0-10 V U: 0-10 V I: 0/4-20 mA...
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6.3.4 Access to signal terminals All terminals for signal cables are located beneath the control panel and can be accessed by opening the door of the CUE. See Fig. 14 Fitting the conductor into the signal terminal fig. 13.
6.3.7 RS-485 GENIbus network connection 6.5 Connecting the MCB 114 sensor input module One or more CUE units can be connected to a control unit via The MCB 114 is an option offering additional analog inputs for the GENIbus. See the example in fig. 16.
Connect the screen to frame at both ends for both motor and signal cables. See fig. 22. If the controller has no cable clamps, connect only the screen to the CUE. See fig. 23. • Avoid unscreened motor and signal cables in electrical cabinets with frequency converters.
Fig. 24 Example of installation without filter Fig. 25 Example of installation with filter. The cable between the CUE and filter must be short Fig. 26 Submersible pump without connection box. Frequency converter and filter installed close to the well Fig.
7. Operating modes 8.2 Controlled operation (closed loop) The following operating modes are set on the control panel in the Proportional "OPERATION" menu, display 1.2. See section 10.6.2 Operating differential mode (1.2). pressure. The differential Operating mode Description pressure is reduced The pump is running in the control mode at falling flow rate Normal...
It is also possible to see the latest five warnings and alarms. 3. "STATUS" shows the status of the CUE and the pump. It is not possible to change or set values. 4. "INSTALLATION" gives access to all parameters. Here a...
The editing buttons of the control panel can be set to these condition, pump operation is not possible. values: • Active The control panel is used for local setting of the CUE. The functions available depend on the pump family connected to the • Not active. CUE.
Have nameplate data for motor, pump and CUE at hand. Value field Use the startup guide for the general setting of the CUE including the setting of the correct direction of rotation. The startup guide is started the first time when the CUE is connected to the power supply.
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Select "Other" if the pump family is not on the list. selected. 10.4.5 Rated motor power (4/16) Max. current will be limited to the value on the CUE nameplate, even if it is set to a higher value during setup. 10.4.8 Speed (7/16) Set the rated motor power, P2, according to the motor nameplate: •...
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The possible settings and the factory setting depend on the pump • Other. family. The CUE will give an alarm if the control mode selected requires Constant pressure: Constant flow rate: a sensor and no sensor has been installed. To continue the •...
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It is possible to interrupt the test and return to the previous display. See the installation and operating instructions of the pump. The general setting of the CUE is now completed, and the startup guide is ready for setting the direction of rotation: •...
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State if the direction of rotation is correct. 10.4.17 Setpoint (8/16) • Yes • No Set the setpoint according to the control mode and sensor selected. The correct direction of The direction of rotation is not rotation has now been set. correct.
Write down the pressure and/or flow rate, and press OK to The menu makes it possible to return to the startup guide, which continue the manual test with the opposite direction of is usually only used during the first startup of the CUE. rotation. 10.5.1 Return to startup guide (0.1) The pump starts after 10 seconds.
A warning will activate a warning indication in CUE, but the pump will not change operating or control mode. It is possible to copy the settings of a CUE and reuse them in Alarm (1.3) another one.
This display shows the actual value controlled. in the warning log. "Warning log 1" shows the latest fault, If no sensor is connected to the CUE, "-" will appear in the "Warning log 2" shows the latest fault but one, etc.
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The display shows the measuring point and the actual value measured by a Pt100/Pt1000 temperature sensor 1 connected to the MCB 114. The measuring point is selected in display 3.21. If no sensor is connected to the CUE, "-" will appear in the display.
• Constant pressure the MCB 114. The measuring point is selected in display 3.22. • Constant differential pressure If no sensor is connected to the CUE, "-" will appear in the display. • Proportional differential pressure • Constant flow rate 10.7.14 Flow rate (2.14)
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The table below shows the suggested controller settings: How to set the PI controller For most applications, the factory setting of the controller constants K and T will ensure optimum pump operation. However, in some applications an adjustment of the controller System/application Heating Cooling...
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Note section 10.6.3 Fault indications. 10.8.5 Buttons on the CUE (3.6) The digital inputs of the CUE (terminal 19, 32 and 33) can be set individually to different functions. Select one of the following functions: • Min. (min. curve) The editing buttons (+, -, On/Off, OK) on the control panel can be •...
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This requires the use of an accessory, such as: • External sensor ® • a Grundfos Liqtec dry-running switch • Limit 1 exceeded • a pressure switch installed on the suction side of a pump •...
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1. Low-flow detection function Diaphragm tank The pump will check the flow regularly by reducing the speed for a short time. If there is no or only a small change in pressure, this Pressure sensor means that there is low flow. The speed will be increased until the stop pressure (actual setpoint + 0.5 x ΔH) is reached and the pump will stop after a few seconds.
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10.8.12 Constant level with stop function (3.14) 2. Low-flow detection with flow switch When the digital input is activated because of low flow, the speed will be increased until the stop level (actual setpoint - 0.5 x ΔH) is reached, and the pump will stop. When the level has reached the start level, the pump will start again.
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GENIbus. The duty/standby function applies to two pumps connected in parallel and controlled via GENIbus. Each pump must be connected to its own CUE and sensor. The primary targets of the function is the following: • To start the standby pump if the duty pump is stopped due to an alarm.
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Select the function of a Pt100/Pt1000 temperature sensor 1 • Not active. connected to an MCB 114: When the function is set to "Active", the CUE will give a warning • D-end bearing when the motor bearings are due to be relubricated or replaced.
Set the time for each of the two ramps, ramp-up and ramp-down: condition, pump operation is not possible. • Factory setting: The CUE can be controlled in various ways at the same time. If Depending on power size. two or more operating modes are active at the same time, the •...
"Controlled" control mode Example: At a sensor min. value of 0 bar, a setpoint set via the CUE menu of 3 bar and an external setpoint of 80 %, the actual setpoint will be as follows: Actual (setpoint set via the CUE menu - sensor min.)
In "Proportional differential pressure" control mode, the actual 15.1 Warning and alarm list setpoint can be set externally within the range from 25 % of maximum head to the setpoint set via the CUE menu. See fig. 40. Status Setpoint...
15.2 Resetting of alarms In case of a fault or malfunction of the CUE, check the alarm list in the "OPERATION" menu. The latest five alarms and latest five warnings can be found in the log menus. Contact a Grundfos technician if an alarm occurs repeatedly.
16. Technical data 16.1 Enclosure Example: Read from the nameplate: The individual CUE cabinet sizes are characterised by their enclosures. The table shows the relationship of enclosure class • Supply voltage = 3 x 380-500 V. and enclosure type. •...
Maximum conductor Typical shaft Maximum Fuse power P2 fuse size type cross-section The CUE comes in a packaging which is not suitable Note [kW] for outdoor storage. 3 x 380-500 V 16.4 Terminal torques 2 x 70 2 x 70...
24 VDC 10 mA Minimum terminal load 24 VAC 20 mA The sound pressure of the CUE is measured at a distance of 1 m from the unit. IEC 60947, parts 4 and 5. The sound pressure level of a motor controlled by a frequency...
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Declaration of conformity GB: EU declaration of conformity We, Grundfos, declare under our sole responsibility that the product CUE, to which the declaration below relates, is in conformity with the Council Directives listed below on the approximation of the laws of the EU member states.
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Unit 1, Ground floor Telefax: +64-9-415 3250 Turkey «Порт» Siu Wai Industrial Centre GRUNDFOS POMPA San. ve Tic. Ltd. Sti. Тел.: +7 (375 17) 286 39 72/73 29-33 Wing Hong Street & Norway Gebze Organize Sanayi Bölgesi Факс: +7 (375 17) 286 39 71...
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