Grundfos CRE Instructions Manual
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Grundfos CRE Instructions Manual

E-pumps with mle frequency-controlled, asynchronous motors
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GRUNDFOS INSTRUCTIONS
CRE, CRIE, CRNE, SPKE, CRKE, MTRE
North America
Grundfos E-pumps with MLE frequency-controlled, asynchronous
motors
Installation and operating instructions

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  • Page 1 GRUNDFOS INSTRUCTIONS CRE, CRIE, CRNE, SPKE, CRKE, MTRE North America Grundfos E-pumps with MLE frequency-controlled, asynchronous motors Installation and operating instructions...
  • Page 3 CRE, CRIE, CRNE, SPKE, CRKE, MTRE English (US) Installation and operating instructions ............4 Français (CA)

  • Page 4: Table Of Contents

    Grundfos warranty only through the Grundfos GO ......31 remainder of the original warranty period set forth by the original purchase date.

  • Page 5: General Information

    • temperature 2.1 Hazard statements • differential temperature The symbols and hazard statements below may appear in Grundfos • flow rate installation and operating instructions, safety instructions and • liquid level in a tank.

  • Page 6: Identification

    3.4 Identification 4. Installing the product 3.4.1 Nameplate 4.1 Mechanical installation The information on the pump nameplate is described below. The pump must be secured to a solid foundation by means of bolts through the holes in the flange or baseplate. DK-8850 Bjerringbro, Denmark In order to retain the UL/cUL approval, follow the Ver-PN-SN...

  • Page 7: Three-Phase Pumps, 20-30 Hp

    4.4 Three-phase pumps, 20-30 hp DANGER Electric shock Death or serious personal injury ‐ The user or the installer is responsible for the installation of correct grounding and protection according to current national and local standards. All operations must be carried out by qualified personnel. DANGER Electric shock Death or serious personal injury...
  • Page 8 4.4.5 Motor protection 4.4.8 Start/stop of pump The pump requires no external motor protection. The motor incorporates thermal protection against slow overloading and The number of starts and stops via the power supply must blocking (IEC 34-11, TP 211). not exceed 4 times per hour. 4.4.6 Protection against voltage transients When the pump is switched on via the power supply, it will start The pump is protected against voltage transients in accordance...

  • Page 9: E-Pump Electrical Connections

    #8 terminal of the E-pump. PT 100 A PT 100 A Related information 4.4.10 Signal cables PT 100 B PT 100 B 4.5.2 Connection of Grundfos pressure sensor ISP44 to E- pump Group 1 Group 2 Group 3 RS-485A RS-485B...
  • Page 10 4.5.3 Connection of E-pump to LiqTec® 2 3 4 Connection of E-pump to LiqTec Pos. Description Dry-running sensor Brown Black Blue White Jumper cable Set to automatic resetting Connection terminals on E-pump: 2 (Start/Stop) and 3 (GND) 1 x 200-240 VAC or 1 X 80-130 VAC...

  • Page 11: Bus Connection Cable

    Related information Related information 4.6.1 New installations 4.7.3 Control mode 4.6.1 Nouvelles installations 6.5 Setting by means of R100 4.6.1 Instalaciones nuevas 4.7 Modes Grundfos E-pumps are set and controlled according to operating and control modes.

  • Page 12: Control Functions

    4.7.3 Control mode 5.2.1 Setpoint Pumps without factory-fitted sensor Without sensor With pressure sensor The pumps are factory-set to control mode uncontrolled. (uncontrolled) (controlled) In control mode uncontrolled, the pump will operate according to the constant curve set, see the figure below. Setpoint set Setpoint set Actual setpoint...
  • Page 13 5.2.2 Operating mode Warning (only three-phase pumps) In case of warning, the cause will appear in this display. Set one of the following operating modes: Possible causes: • Normal (duty) • No warning indication. • Stop • Sensor signal outside signal range. •...

  • Page 14: Menu Status

    5.3 Menu STATUS 5.3.4 Speed The displays appearing in this menu are status displays only. It is not possible to change or set values. The displayed values are the values that applied when the last communication between the pump and the R100 took place. If a status value is to be updated, point the R100 at the control panel and press "OK".

  • Page 15: Menu Installation

    5.3.8 Time till relubrication of motor bearings 5.4 Menu INSTALLATION 5.4.1 Control mode Without sensor With pressure sensor (uncontrolled) (controlled) This display shows when to relubricate the motor bearings. The controller monitors the operating pattern of the pump and calculates the period between bearing relubrications.
  • Page 16 Constant differential pressure Constant flow rate Constant pressure Δp L1 < 5 m: 0.5 L1 > 5 m: 3 L1 > 10 m: 5 Constant level Δp L1: distance in meters between pump and sensor. Constant Heating Cooling temperature system system -0.5 10 + 5L2...
  • Page 17 When this function is selected, lack of inlet pressure or water shortage can be detected. This requires the use of an accessory, such as these: ® • a Grundfos Liqtec dry-running sensor • a pressure switch installed on the suction side of a pump The operating buttons on the control panel can be set to •...
  • Page 18 5.4.8 Stop function When the pressure has fallen to start pressure, the pump will start again. If there is still no flow, the pump will quickly reach stop pressure and stop. If there is flow, the pump will continue operating according to the setpoint.
  • Page 19 2. Check that the power supply is connected to the first pump ΔH according to the installation and operating instructions. 3. Use Grundfos R100 to set the duty/standby to Not active in the installation menu. 4. Use Grundfos R100 to set the Operating mode to Stop in the operation menu.
  • Page 20 8. Connect the power supply to the two pumps according to the installation and operation instructions. 9. Use Grundfos R100 to check that the Operating mode is set to Normal in the operation menu of the second pump. AYB connector plug 10.
  • Page 21 5.4.12 Operating range 5.4.14 Confirming relubrication/replacement of motor bearings (only three-phase pumps) How to set the operating range: This function can be set to these values: • Set the min. curve within the range from max. curve to 12 % of maximum performance.

  • Page 22: Typical Display Settings For Constant-Pressure E-Pumps

    5.5 Typical display settings for constant-pressure E-pumps 6.2.1 6.3.1 6.4.1 6.4.7 6.2.2 6.3.2 7.8.2 6.4.7 6.4.8 6.4.3 6.2.3 6.3.3 6.4.9 6.3.4 6.4.4-1 6.2.3 6.4.4-2 6.3.5 6.4.10 6.3.6 6.4.5 6.4.11 6.4.12 6.3.7 6.4.6 6.4.13 6.3.8 6.4.7 6.4.14 6.4.15 Menu overview Pos. Description Operation Status...

  • Page 23: Typical Display Settings For Analog-Input E-Pumps

    5.6 Typical display settings for analog-input E-pumps 6.2.1 6.3.1 6.4.1 6.4.7 6.2.2 6.3.2 7.8.2 6.4.7 6.4.8 6.4.3 6.2.3 6.3.3 6.4.9 6.3.4 6.4.4-1 6.2.3 6.4.4-2 6.3.5 6.4.10 6.3.6 6.4.5 6.4.11 6.4.12 6.3.7 6.4.6 6.4.13 6.3.8 6.4.7 6.4.14 6.4.15 Menu overview Pos. Description Operation Status...

  • Page 24: Digital Input

    5.7 Digital input Select the actual external signal, 0-10 V, 0-20 mA, 4-20 mA, via the R100. See the section on external setpoint. By means of the R100, one of the following functions can be If control mode uncontrolled is selected by means of the R100, the selected for the digital input: pump can be controlled by any controller.

  • Page 25: Bus Signal

    5.6 Typical display settings for analog-input E-pumps 5.9 Bus signal The pump supports serial communication via an RS-485 input. The communication is carried out according to Grundfos bus protocol, GENIbus protocol, and enables connection to a building management system or another external control system.

  • Page 26: Indicator Lights And Signal Relay

    5.11 Indicator lights and signal relay The operating condition of the pump is indicated by the green and red indicator lights fitted on the pump control panel and inside the terminal box. See the figure below. Pos. Description Green Position of indicator lights Besides, the pump incorporates an output for a potential-free signal via an internal relay.
  • Page 27 The functions of the two indicator lights and the signal relay are as shown in the following table: Indicator lights Signal relay activated during: Fault/ Alarm, Description Operation Pump Fault (red) Warning Operating Ready (green) running Relubricate The power supply has been switched off. Permanently The pump is operating.

  • Page 28: Setting The Product

    6. Setting the product 6.1 Factory settings 6.1.1 Pumps without factory-fitted sensor The pumps have been factory-set to control mode uncontrolled. The setpoint value corresponds to 100 % of the maximum pump performance (see data sheet for the pump). 6.1.2 Pumps with pressure sensor The pumps have been factory-set to control mode controlled.

  • Page 29: Setting By Means Of R100

    Pump performance setting, control mode uncontrolled 6.5 Setting by means of R100 The pump is designed for wireless communication with Grundfos remote control R100. R100 communicating with the pump via infra-red light...
  • Page 30 6.2.1 6.3.1 6.4.1 6.4.7 7.8.2 6.2.2 6.3.2 6.4.7 6.4.8 6.4.3 6.2.3 6.3.3 6.4.9 6.2.3 6.3.4 6.4.4 6.2.4 6.3.5 6.4.10 6.4.4-1 6.3.6 6.4.11 6.4.4-2 6.3.7 6.4.12 6.4.5 6.2.4 6.4.13 6.3.8 6.4.6 6.3.9 6.4.14 6.4.7 6.4.7 6.4.15 Menu overview Pos. Description General Operation Status Installation...

  • Page 31: Grundfos Go

    Shows the operating condition of the Grundfos Eye product. When Grundfos GO Remote communicates with the pump, the indicator light in the middle of the Grundfos Eye will flash green. Primary status Shows the primary status value. Communication must be established using one of these...

  • Page 32: Setting By Means Of Pc Tool E-Products

    Special setup requirements differing from the settings available via to operating mode Stop or Max., and the external signal can only the R100 require the use of Grundfos PC Tool E-products. This set the E-pump to operating mode Stop. again requires the assistance of a Grundfos service technician or engineer.

  • Page 33: Taking The Product Out Of Operation

    7. Taking the product out of operation 7.1 Emergency operation (only 20-30 hp) DANGER Electric Shock Death or serious personal injury ‐ Never make any connections in the pump terminal box unless all electric supply circuits have been switched off for at least 5 minutes. ‐...

  • Page 34: Insulation Resistance

    When it is time to replace the varistor, R100 and PC Tool E- 7.2 Insulation resistance products will indicate this as a warning. A Grundfos technician is required for replacement of the varistor. 20-30 hp Contact your local Grundfos company for assistance.

  • Page 35: Technical Data

    Maximum cable length: 1640 ft. Bus input 9.1.2 Overload protection Grundfos bus protocol, GENIbus protocol, RS-485. The overload protection of the E-motor has the same characteristic as an ordinary motor protector. As an example, the E-motor can Screened 3-core cable: 0.2 - 1.5 mm / 28-16 AWG.

  • Page 36: Other Technical Data

    (first environment). 1. Use the public or private waste collection service. When the motors are installed in 2. If this is not possible, contact the nearest Grundfos company or residential areas, supplementary service workshop. measures may be required as the motors may cause radio interference.
  • Page 37 This device must accept any interference, including interference that may cause undesired operation of the device. Users are cautioned that changes or modifications not expressly approved by Grundfos could void the user's authority to operate the equipment. Pour le Canada Ce dispositif est conforme à...
  • Page 38 A.1.4. Electrical connection Conductors See the sections on electrical installation and cable requirements. Torques See the section on torques. Line reactors The maximum line reactor size in front of the drive must not exceed the following values: Maximum line reactor size [mH] 1450-2000 rpm 2900-4000 rpm...
  • Page 39 2941 Brighton Road Oakville, Ontario L6H 6C9 Tel.: +1-905 829 9533 Fax: +1-905 829 9512 Mexico Bombas GRUNDFOS de México S.A. de C.V. Boulevard TLC No. 15 Parque industrial Stiva Aeropuerto Apodaca, N.L. 66600 Tel.: +52-81-8144 4000 Fax: +52-81-8144 4010...
  • Page 40 98566352 11.2022 ECM: 1353331 www.grundfos.com...

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