Grundfos CUE Installation And Operating Instructions Manual
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Grundfos CUE Installation And Operating Instructions Manual

0.75 - 125 hp; especially designed for pumps
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GRUNDFOS INSTRUCTIONS
CUE, 0.75 - 125 Hp
Installation and operating instructions

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  • Page 1 GRUNDFOS INSTRUCTIONS CUE, 0.75 - 125 Hp Installation and operating instructions...

  • Page 2: Table Of Contents

    Products manufactured by GRUNDFOS PUMPS CORPORATION Transportation and unpacking (Grundfos) are warranted to the original user only to be free of defects Space requirements and air circulation in material and workmanship for a period of 24 months from date of Mounting installation, but not more than 30 months from date of manufacture.

  • Page 3: Symbols Used In This Document

    (0.55 to 90 kW). • The on/off button of the control panel does not disconnect the Always keep this manual close to the CUE. CUE from the power supply and must therefore not be used as a safety switch. 3.1 General description •...

  • Page 4: Identification

    4.4.1 Reduction at low air pressure 5.2 Packaging label The CUE can also be identified by means of the label on the Warning packaging. At altitudes above 6600 ft. (2000 m), the PELV requirements cannot be met. 6. Mechanical installation PELV = Protective Extra Low Voltage.

  • Page 5: Space Requirements And Air Circulation

    • Ambient temperature up to 122 °F (50 °C). • Hang the CUE directly on the wall, or fit it with a back plate. See fig. 3. ELCB Example of three-phase mains connection of the CUE Fig. 5...

  • Page 6: Mains And Motor Connection

    Example: If the supply voltage is 208 V, choose a 208 V rated motor. 7.2.1 Mains switch A mains switch can be installed before the CUE according to local regulations. See fig. 5. 7.2.2 Wiring diagram The wires in the terminal box must be as short as possible.
  • Page 7 For information about enclosures, see table in section Note Note 17.1 Enclosure. Cable screens must be grounded at both ends. The motor cable must be screened for the CUE to Caution The cable screen must be exposed and in meet EMC requirements. Note Note physical contact with the mounting plate and 1.
  • Page 8 3. Fix the mains cable with a cable clamp. 3. Fix the mains cable with a cable clamp. Motor connection The motor cable must be screened for the CUE to Caution meet EMC requirements. Fig. 14 Mains connection, B1 and B2...
  • Page 9 1. Connect the ground conductor to terminal 95 (PE). See fig. 18. 2. Connect the mains conductors to terminals 91 (L1), 92 (L2), 93 (L3). Motor connection The motor cable must be screened for the CUE to Caution meet EMC requirements.

  • Page 10: Connecting The Signal Terminals

    Motor connection 7.3.1 Wiring diagram, signal terminals The motor cable must be screened for the CUE to Caution meet EMC requirements. 1. Connect the ground conductor to terminal 99 (PE). See figs and 20. 2. Connect the motor conductors to terminals 96 (U), 97 (V), 98 (W).
  • Page 11 C2, C3 and C4 7.3.3 Connection of a thermistor (PTC) to the CUE The connection of a thermistor (PTC) in a motor to the CUE requires an external PTC relay. The requirement is based on the fact that the thermistor in the motor only has one layer of insulation to the windings.
  • Page 12 Remove the control panel to set the contact. See fig. 26. Fig. 26 Setting contact A54 to current signal "I" 7.3.7 RS-485 GENIbus network connection One or more CUE units can be connected to a control unit via GENIbus. See the example in fig. 27. Bus Ter = ON Fig.

  • Page 13: Connecting The Signal Relays

    Fig. 30 Terminals for relay connection, A2 and A3 Fig. 34 Terminals for relay connection, B4 Fig. 31 Terminals for relay connection, A4, A5, B1 and B2 Fig. 35 Terminals for relay connection, C3 and C4, in the upper right corner of the CUE...

  • Page 14: Connecting The Mcb 114 Sensor Input Module

    • Connect the screen to ground at both ends for both motor and When the MCB 114 has been installed, the CUE will automatically signal cables. See fig. 39. If the controller has no cable detect if the sensor is Pt100 or Pt1000 when it is switched on.

  • Page 15: Rfi Filters

    7.7 RFI filters 7.9 Motor cable To meet the EMC requirements, the CUE comes with the Figures show installations with and without filter and following types of built-in radio frequency interference filter (RFI). where to use screened and unscreened cable.

  • Page 16: Operating Modes

    8. Operating modes 9.2 Controlled operation (closed loop) The following operating modes are set on the control panel in the "OPERATION" menu, display 1.2. See section Proportional 11.5.2 Operating differential pressure. mode (1.2). The differential pressure is reduced at Operating mode Description falling flow rate and increased at rising The pump is running in the control mode...

  • Page 17: Menu Overview

    Menu structure The CUE has a start-up guide, which is started at the first start- 3. "STATUS" shows the status of the CUE and the pump. It is not up. After the start-up guide, the CUE has a menu structure possible to change or set values.
  • Page 18 2. STATUS 3. INSTALLATION 2.10 3.12 3.24 2.11 3.13 3.25 2.12 3.14 2.13 3.3A 3.15 2.14 3.16 2.15 3.17 2.16 3.18 2.17 3.19 3.20 3.21 3.10 3.22 3.11 3.23...

  • Page 19: Setting By Means Of The Control Panel

    The editing buttons of the control panel can be set to these condition, pump operation is not possible. values: The control panel is used for local setting of the CUE. • Active The functions available depend on the pump family connected to •...

  • Page 20: Back To Factory Settings

    Use the start-up guide for the general setting of the CUE including the setting of the correct direction of rotation. The start-up guide is started the first time when the CUE is connected to the power supply. It can be restarted in the "GENERAL"...
  • Page 21 The possible settings and the factory setting depend on the pump Set the maximum motor current according to the motor family. nameplate: The CUE will give an alarm if the control mode selected requires • 0-999 A. a sensor and no sensor has been installed. To continue the The setting range depends on the CUE type, and the factory setting without a sensor, select "Open loop", and proceed.
  • Page 22 See the installation and operating instructions of the pump. • 0-200 ft. (0-4 bar) • 0-200 ft. (0-4 bar) The general setting of the CUE is now completed, and the start- • 0-334 ft. (0-6 bar) • 0-334 ft. (0-6 bar) up guide is ready for setting the direction of rotation: •...
  • Page 23 11.3.18 General settings are completed (16/16) • Press [OK] to make the pump ready for operation or start the pump in the "Normal" operating mode. Then display 1.1 of the "OPERATION" menu will appear. 11.3.19 Manual setting when the direction of rotation is visible (13/16) It must be possible to observe the motor fan or shaft.

  • Page 24: General

    Repeating the start-up guide may lead to heating of the motor. The menu makes it possible to return to the start-up guide, which is usually only used during the first start-up of the CUE. 11.4.1 Return to start-up guide (0.1) The first test is completed.

  • Page 25: Operation

    11.5.3 Fault indications Faults may result in two types of indication: Alarm or warning. It is possible to copy the settings of a CUE and reuse them in An "alarm" will activate an alarm indication in CUE and cause another one.

  • Page 26: Menu Status

    This display shows the actual value controlled. • the warning code If no sensor is connected to the CUE, "-" will appear in the • the number of minutes the pump has been connected to the display.
  • Page 27 MCB 114. action in the "INSTALLATION" menu. See section 11.7.17 Confirming relubrication/replacement of motor bearings If no sensor is connected to the CUE, "-" will appear in the (3.20). When relubrication is confirmed, the figure in the above display.

  • Page 28: Menu Installation

    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. 11.6.13 Temperature sensor 2 (2.13) This display shows the configuration file.
  • Page 29 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...
  • Page 30 11.7.4 Signal relays 1 and 2 (3.4 and 3.5) The CUE has two signal relays. In the display below, select in which operating situations the signal relay should be activated. This display shows the protocol selection for the RS-485 port of...
  • Page 31 When this function is set for digital input 4 and a pulse sensor is connected to terminal 33, the accumulated flow can be The digital inputs of the CUE (terminal 19, 32 and 33) can be set measured. individually to different functions.
  • Page 32 11.7.10 Constant pressure with stop function (3.14) 2. Low-flow detection with flow switch When the digital input is activated because 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. When the pressure has fallen to start pressure, the pump will start again.
  • Page 33 11.7.11 Constant level with stop function (3.14) 11.7.12 Sensor 1 (3.15) Setting of sensor 1 connected to terminal 54. This is the feedback Settings sensor. The stop function can be set to these values: Select among the following values: • Active •...
  • Page 34 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.
  • Page 35 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.

  • Page 36: Setting By Means Of Pc Tool E-Products

    • Dry running (from external sensor) The CUE can be controlled in various ways at the same time. • Not active. If two or more operating modes are active at the same time, the •...

  • Page 37: External Setpoint

    Min. curve Example: At a maximum head of 40 ft. (12 meters), a setpoint of 20 ft. (6 meters) set via the CUE menu and an external setpoint of 10 V 40 %, the actual setpoint will be as follows: Ext.

  • Page 38: Troubleshooting

    16. Troubleshooting 16.2 Resetting of alarms In case of a fault or malfunction of the CUE, check the alarm list 16.1 Warning and alarm list in the "OPERATION" menu. The latest five alarms and latest five warnings can be found in the log menus.

  • Page 39: Technical Data

    17. Technical data 17.1 Enclosure The individual CUE cabinet sizes are characterized by their enclosures. The table shows the relationship of enclosure class and enclosure type. Example: Read from the nameplate: • Supply voltage = 3 x 380-500 V. •...

  • Page 40: Main Dimensions And Weights

    332.8 (151) The dimensions are maximum height, width and depth. Dimensions are without options. 17.3 Surroundings Relative humidity 5-95 % RH The CUE comes in a packaging which is not Note Note suitable for outdoor storage. Ambient temperature Max. 122 °F (50 °C) Average ambient temperature over 24 hrs.

  • Page 41: Terminal Tightening Torques

    17.4 Terminal tightening torques Typical shaft Max. fuse Max. conductor Fuse type power P2 size gauge size Tightening Torque [ft.-lb. (Nm)] Enclosure [Hp (kW)] [inch type Mains Motor Ground Relay 3 x 200-240 V 0.75 (0.6) .006 (4) 1.3 (1.8) 1.3 (1.8) 2.2 (3) 0.4 (0.6)
  • Page 42 17.6.3 UL fuses and conductor gauge size to mains and motor Fuse type Typical shaft Maximum conductor Bussmann Bussmann Bussmann SIBA Littel Fuse Ferraz-Shawmut Ferraz-Shawmut power P2 cross-section [Hp (kW)] [AWG (mm)] 1 x 200-240 V 1.1 (0.8) KTN-R20 1.5 (1.1) KTN-R30 2.2 (1.6) KTN-R40...

  • Page 43: Inputs And Outputs

    17.8 Sound pressure level Relay 01, terminal number 1 (C), 2 (NO), 3 (NC) The sound pressure of the CUE is maximum 70 dB(A). Relay 02, terminal number 4 (C), 5 (NO), 6 (NC) The sound pressure level of a motor controlled by a frequency...
  • Page 45 GRUNDFOS Kansas City GRUNDFOS Canada GRUNDFOS México 17100 West 118th Terrace 2941 Brighton Road Boulevard TLC No. 15 Olathe, Kansas 66061 Oakville, Ontario L6H 6C9 Canada Parque Industrial Stiva Aeropuerto Phone: (913) 227-3400 Phone: +1-905 829 9533 C.P. 66600 Apodaca, N.L. México...
  • Page 46 L-CUE-TL-10 98806765 0215 ECM: 1151643 www.grundfos.com www.grundfos.us...

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