GRUNDFOS INSTRUCTIONS. CR Monitoring. Installation and operating instructions

GRUNDFOS INSTRUCTIONS CR Monitoring Installation and operating instructions

Declaration of Conformity We Grundfos declare under our sole responsibility that the product CR Monitor, to which this declaration relates, is in conformity with these Council directives on the approximation of the laws of the EC member states: Machinery Directive (98/37/EC). Standard used: EN 809: 2000. Low Voltage Directive (2006/95/EC). Standards used: EN 60335-1: 2002 and EN 60335-2-51: 2003. EMC Directive (2004/108/EC). Standards used: EN 61000-6-2 and EN 61000-6-3. Declaration of Conformity We Grundfos declare under our sole responsibility that the product CR Monitor, to which this declaration relates, is in conformity with these Council directives on the approximation of the laws of the EC member states: Machinery Directive (98/37/EC). Standard used: EN 809: 2000. Low Voltage Directive (2006/95/EC). Standards used: EN 60335-1: 2002 and EN 60335-2-51: 2003. EMC Directive (2004/108/EC). Standards used: EN 61000-6-2 and EN 61000-6-3. Konformitätserklärung Wir, Grundfos, erklären in alleiniger Verantwortung, dass das Produkt CR Monitor, auf das sich diese Erklärung bezieht, mit den folgenden Richtlinien des Rates zur Angleichung der Rechtsvorschriften der EU-Mitgliedsstaaten übereinstimmt: Maschinenrichtlinie (98/37/EG). Norm, die verwendet wurde: EN 809: 2000. Niederspannungsrichtlinie (2006/95/EG). Normen, die verwendet wurden: EN 60335-1: 2002 und EN 60335-2-51: 2003. EMV-Richtlinie (2004/108/EG). Normen, die verwendet wurden: EN 61000-6-2 und EN 61000-6-3. Bjerringbro, 1st November 2008 Jan Strandgaard Technical Director 2

CR Monitoring Installation and operating instructions 4 Montage- und Betriebsanleitung 39 Monterings- og driftsinstruktion 77 3

CONTENTS Page 1. Symbols used in this document 4 2. Scope of this manual 4 3. Quick start-up 5 4. Product description 5 4.1 Primary functions 5 4.2 Cavitation monitoring 5 4.3 Graphical display 6 4.4 Symbols used in the display 6 4.5 Efficiency monitoring 6 5. Nameplate 7 6. Software label 7 7. Type key 7 8. Installation 8 8.1 Mechanical installation 8 8.1.1 The pump 8 8.1.2 CR Monitor 8 8.2 Connection to system 8 8.2.1 Sensors 8 8.2.2 Schematic system overview 8 8.2.3 Terminal block in CR Monitor 9 8.3 EMC-correct installation 11 8.4 Electrical connection 11 9. Control panel 12 9.1 Display 12 9.2 Buttons and indicator lights 13 10. Start-up 13 10.1 Setting of efficiency and cavitation monitoring 13 11. Learning 13 11.1 Forms of learning 14 11.1.1 Pump in open loop (active learning) 14 11.1.2 Pump with constant discharge pressure 15 11.1.3 Passive learning 15 12. Functions 16 12.1 Functions tree 16 12.2 Overview 18 13. Status (1) 19 13.1 System status (1.1) 19 13.2 Q/H curve (1.2) 19 13.3 Q/P curve (1.3) 19 13.4 Efficiency curve (1.4) 20 13.5 Cavitation curve (1.5) 20 13.6 Measurements (1.6) 20 13.7 Q/time histogram (1.7) 20 13.8 Historical data (1.8) 21 14. Alarm (2) 21 14.1 Alarm status (2) 21 14.2 Current alarms (2.1) 21 14.3 Alarm log (2.2) 22 15. Limits (3) 22 15.1 Fault handling (3.1) 22 15.1.1 Sensor measurements (3.1.1) 23 15.1.2 Example: Fault handling, flow measurement (3.1.1.1) 23 15.1.3 Monitoring functions (3.1.2) 24 15.1.4 Example: Fault handling, efficiency (3.1.2.1) 24 15.2 Monitoring filters (3.1.3) 25 15.2.1 Pump and IO 351 (3.1.4) 25 15.2.2 Other fault handling (3.1.5) 26 15.2.3 General settings (3.1.6) 26 15.3 Maintenance (3.2) 26 15.4 Status display data (3.3) 26 16. Installation (4) 27 16.1 CR Monitor settings (4.1) 27 16.1.1 Learning (4.1.1) 27 16.1.2 Cavitation (4.1.2) 28 16.1.3 Maintenance (4.1.3) 28 16.2 Input/output settings (4.2) 28 16.2.1 Digital inputs (4.2.1) 29 16.2.2 Analog inputs (4.2.2) 29 16.2.3 Analog inputs and measured values (4.2.2.1) 29 16.2.4 Digital outputs (4.2.3) 30 16.2.5 Analog outputs (4.2.4) 31 16.3 Basic settings, CU 351 (4.3) 32 16.3.1 Display language (4.3.1) 32 16.3.2 Units (4.3.2) 32 16.3.3 Date and time (4.3.3) 33 16.3.4 Password (4.3.4) 33 16.3.5 Ethernet (4.3.5) 33 16.3.6 GENIbus number (4.3.6) 34 16.3.7 Software status (4.3.7) 34 17. Data communication 35 17.1 Ethernet 35 17.2 GENIbus 36 18. Maintenance 37 18.1 CU 351 37 19. Taking the CR Monitor out of operation 37 20. Technical data 37 20.1 Ambient temperature 37 20.2 Air humidity 37 20.3 Enclosure class 37 20.4 Supported pumps 37 20.5 Supported motors 37 20.6 Liquid temperature 37 20.7 Cable lengths 37 21. Electrical data 37 22. Fault finding 38 23. Disposal 38 Warning Prior to installation, read these installation and operating instructions. Installation and operation must comply with local regulations and accepted codes of good practice. 1. Symbols used in this document Caution Warning If these safety instructions are not observed, it may result in personal injury! If these safety instructions are not observed, it may result in malfunction or damage to the equipment! s or instructions that make the job easier and ensure safe operation. 2. Scope of this manual These installation and operating instructions apply to Grundfos CR Monitor control cabinets. Subcomponents in the control cabinet are only described in these instructions when they are important for the operation of the CR Monitor. Further documentation supplied with the CR Monitor: Pump type Documentation CRE, CR with CR CUE Wiring diagram x x CU 351 x x IO 351 x x LiqTec x x MP 204 x - CIU 150 x * x * CIU 200 x * x * CIU 250 x * x * * Documentation is supplied if the component is selected (option). 4

3. Quick start-up This manual describes the installation, setting and operation of the CR Monitor. The product offers many functions and settings, and the manual may therefore seem comprehensive. For a detailed description of the functions and settings of the CR Monitor, please see the individual sections in this manual. For a quick start-up, see the sections below. Installation Position of control cabinet - section 8.1.2, page 8. Installation and connection of sensors - section 8.2, page 8. Electrical connection - section 8.4, page 11. Start-up As a minimum, the signal and measuring range of the analog inputs must be set. See section 16.2.2, page 29. The pump can be started, and the duty point will be shown in the display. For further settings of efficiency and cavitation monitoring, see section 10.1, page 13. Fault finding The service instructions contain a complete list of fault indications with fault cause, explanation and remedy. They can be downloaded from WebCAPS (www.grundfos.com > International website > WebCAPS). 4. Product description The CR Monitor consists of a control cabinet with all necessary components such as main switch, contactors and IO modules connected to a common terminal block. 4.1 Primary functions The CR Monitor is designed for monitoring one pump and makes it possible for the operator to set limits for warnings and alarms. This offers the operator these possibilities: To detect if the pump efficiency is reduced. To detect if pump is about to cavitate. Detect if the pump is running outside the normal duty range. To plan pump maintenance in order to prevent unplanned downtime. The CR Monitor furthermore offers the operator these possibilities: monitoring of operation and protection of equipment bus communication with for instance a SCADA system data collection, monitoring and setting via internet. 4.2 Cavitation monitoring The cavitation monitoring does not depend on learning the pump's operating characteristic. The CR Monitor calculates the actual NPSH value by measuring the actual inlet pressure and temperature and compares the values with the NPSH data of the pump. The NPSH value calculated applies only to clean and degassed water. NPSH, Net Positive Suction Head NPSH R (required NPSH) states how big the absolute pressure must be at the pump inlet to prevent cavitation. The NPSH R depends on the flow rate and the water vapour pressure at a given temperature. NPSH A (available NPSH) is the pressure that is available at the pump inlet. The curve in the display (fig. 2) shows NPSH R. It is usually advisable to add a safety margin of 0.5 m to NPSH R to ensure that the pump does not cavitate. The duty point shown in the display is NPSH A. In order to prevent cavitation, NPSH A must be greater than NPSH R. m NPSH A NPSH R Fig. 1 CR Monitor control cabinet The control cabinet is designed for mounting on a wall or pedestal. GrA7120 Fig. 2 NPSH curve m 3 /h TM04 3044 3508 Caution The CR Monitor can only be used for the motor size and type for which it has been configured. Contact Grundfos if the CR Monitor is to be used for another motor! 5

4.3 Graphical display The CR Monitor has a graphical display showing the actual duty point in relation to an operating characteristic learned (flow rate, pressure, efficiency and power) and the distance to the cavitation curve of the pump. If the learning has been finished and the duty point then moves outside the range learned, the CR Monitor will give a warning, "Outside the range learned". See fig. 5. bar bar bar The pump is ok 100 % speed m 3 /h Operating characteristic learned TM04 3005 3508 Fig. 5 Operation outside the range learned 4.4 Symbols used in the display m 3 /h The CR Monitor shows the operational status of the pump with three symbols: The pump is running within the range learned. TM04 3009 3508 Fig. 3 The pump efficiency is reduced Example of graphical display The CR Monitor requires stable measured data in order to able to learn the operating characteristic of the pump. The lower curve in fig. 3 could also show a changed duty point with no stable measured data yet. When there are stable measured data, the CR Monitor will show the new curve corresponding to the new duty point. During operating, the CR Monitor will show the actual pump duty point in relation to the parts of the pump's operating characteristic where learning has taken place. bar Actual duty point Complete learning 100 % speed 100 % speed m 3 /h m 3 /h TM04 3006 3508 TM04 3005 3508! X The duty point has exceeded a set warning limit. Maintenance can be planned in good time. The duty point is outside the range learned. The CR Monitor lets the pump continue to run in case of warnings. The duty point has exceeded a set alarm limit. The operator decides whether the CR Monitor is to stop the pump or whether it is to continue to run. 4.5 Efficiency monitoring The function is based on a mathematical model of the pump and motor. On the basis of this model, the CR Monitor can evaluate if the relation between the hydraulic power transferred to the liquid (P hyd ) and the input power from mains (P 1 ) corresponds to the operating characteristic learned. The CR Monitor calculates the total efficiency as the relation between hydraulic power and input power(η tot = P hyd /P 1 ). The CR Monitor then compares the actual measured data and efficiency to the data and efficiency learned. A reduced efficiency is typically caused by wear or clogging of the hydraulic system of the pump. The friction in the motor bearings may increase after relubrication and thus reduce the efficiency for a short period. The CR Monitor cannot show the cause of the increased loss, but the operator of the pump will be able to fault-find and prepare maintenance of the pump before an unintended stoppage occurs. bar m 3 /h TM04 3008 3508 Partial learning Fig. 4 Complete and partial learning 6

5. Nameplate The nameplate of the CR Monitor is on the inside of the cabinet door. Type: Prod.-Nr.: Options: 1 Equipment Nr.: Commission: Main supply: In: 7 P.C. YYWW: Main Pumps: 3 Auxiliary Pumps: 2 6 5 4 Ambient Temperature P I Switch- Number kw mm max mode I IP 9 10 11 12 13 14 15 8 6. Software label The software label is on the back of the CU 351 controller. Fig. 7 Software label Pos. 1 Flow data - No of GSC file 2 Motor data - No of GSC file 3 Pump data - No of GSC file 4 Software version - No of software version CR Monitor Flow data Motor data 1 2 Software version: 4 Pump data 3 A GSC file (Grundfos Standard Configuration) is a configuration file. TM04 3071 3608 Made in P1 16 17 18 7. Type key Fig. 6 Nameplate Pos. 1 Type designation 2 Product number 3 Options 4 Internal serial number 5 Sales order No/production order No 6 Supply voltage [V] 7 Rated current [A] 8 Operating range for ambient temperature [ C] 9 Year-week code 10 Enclosure class 11 Number of pumps 12 Motor power [kw] 13 Min. current limit 14 Max. current limit 15 Starting method (not stated for CRE and CR with CUE) 16 Country of origin 17 Production department 18 CE-mark TM04 3070 3608 Example CR Monitor 2.2 kw DOL 3x400V 50-60Hz PE IP54 Type designation CR Monitor (MG and Siemens) or CRE Monitor (MGE and CUE) Motor size and starting method (not stated for CRE and CR with CUE) Supply voltage Mains frequency Separate PE conductor Enclosure class 7

8. Installation Warning Installation and operation must comply with local regulations and accepted codes of good practice. Before installation, check that the specifications of the CR Monitor correspond to the order. no visible parts have been damaged. 8.2.2 Schematic system overview There are two pump types: Mains-operated CR pumps. The motor is supplied with current through the CR Monitor control cabinet. CRE pumps and CR pumps supplied by a CUE. The motor has separate power supply. CR 8.1 Mechanical installation This section describes the mechanical installation of the CR Monitor control cabinet and also provides general advice about how to position sensors in order to achieve stable measured values. A standard configuration of system connections in the control cabinet will be described with reference to the configuration of sensors and signals via the menus in the CU 351. AO DO DI A AI Communication 8.1.1 The pump Install the pump according to the installation and operating instructions supplied with the pump. 8.1.2 CR Monitor Location Due to radio noise, the CR Monitor must not be installed in residential areas (first environment). The CR Monitor is not designed for outdoor installation and must not be exposed to direct sunlight. 8.2 Connection to system 8.2.1 Sensors The CR Monitor requires correct measured values for giving an accurate indication of the pump status. It is therefore important to position and install sensors according to the guidelines of the manufacturer. General requirements In a system with a diaphragm tank, sensors must not be installed after the tank. The sensors must always be correctly sized for the range they are to measure. If the sensor is too small, it will be saturated. If it is too big, the solution of the sensor signal will be too poor. In the case of sensors where is it possible to set a damping of the measured value, the damping should be as low as possible. In the case of cavitation monitoring, the sensor for inlet pressure must measure absolute pressure. It must be as close to the pump inlet as possible (max. 30 cm). The table below shows what sensor types can be used for cavitation and efficiency monitoring: Sensor type Monitoring Inlet/discharge pressure Cavitation Efficiency Absolute/absolute x x Relative/relative * - x Differential pressure sensor - x * Requires that the inlet pressure is always positive. Fig. 8 CRE Fig. 9 CR Monitor with a CR pump CR Monitor with a CRE pump In the case of CR with a CUE, pos. B and C from the CR Monitor in fig. 9 must be connected to the CUE. 4 TT AO DO DI 4 TT 1 2 PT PT A B C AI 1 2 PT PT The CRE and CUE must be set to automatic resetting of alarms. 3 FT 5 Communication 3 FT 5 TM04 2967 3408 TM04 2966 3408 Pos. Analog input/ output 1 AI1 (CU 351) Inlet pressure 2 AI2 (CU 351) Discharge pressure 3 AI3 (CU 351) Flow rate 4 AI1 (IO 351) Temperature 5 AI2 (IO 351) Optional sensor - AO4 (CU 351) (Optional) Display Analog inputs (4.2.2) Analog outputs (4.2.4) 8

Digital input/ output DI1 (CU 351) DI2 (CU 351) * DI3 (CU 351) DO1 (CU 351) DO2 (CU 351) ** DO4 (IO 351) DO5 (IO 351) External fault The pump is running (Y/D) Resetting of alarm Relay, alarm Relay, alarm stop Relay, warning Relay, ready Display Digital inputs (4.2.1) Digital outputs (4.2.3) * The digital input must be configured in the case of a CR pump. ** The output is only connected to the terminal block in the case of a CRE pump, but it must also be configured in the case of a CR pump. Pos. Liqtec A LiqTec Dry-running protection Pos. Communication - GENIbus (external) Bus communication B GENIbus (internal) * Start/stop signal to CRE or CUE C LiqTec * Stop signal to CRE or CUE - Ethernet Webserver (RJ45 plug) * Only CRE 8.2.3 Terminal block in CR Monitor The components of the CR Monitor are connected to a common terminal block at the bottom of the control cabinet. Components and signal transmitters mentioned in section 8.2 Connection to system must be connected to the terminal block. The web server must be connected directly to the CU 351 via a cable with an RJ45 plug. See the installation and operating instructions of the CU 351 supplied with the control cabinet. For connection of SMS box (if selected), see separate manual. Terminal block The terminal block is divided into groups as shown below. X0 X1 X10 X11 X14 X15 TM04 2968 3408 Fig. 10 Terminal block in CR Monitor Pump X0 X1 X10 X11 X14 X15 CR x x x x x x CRE CR with CUE x - x x x x Connection Make sure to keep unused cable entries closed in order to maintain the IP class of the control cabinet. Cables for sensors, signal transmitters and communication must be connected to the terminal block and configured via the menus in the CU 351. The table below shows an overview of terminals and refers to displays where configuration is carried out. 9

Group Pump type Terminal Value Comments PE1 Power supply to control cabinet and motor. PE2 CR Power supply L1 400 V X0 L2 400 V L3 400 V CRE CR with CUE Power supply L1 400 V Power supply to control cabinet. L2 400 V The motor has separate power supply. CR (DOL) Motor connection U1 400 V Starting method: Direct-on-line starting V1 400 V W1 400 V U1 400 V Starting method: Star-delta starting X1 V1 400 V CR (Y/D) Motor connection W1 V2 400 V 400 V W2 400 V U2 400 V AI1 (CU 351) PE1 Sensor for inlet pressure (section 16.2.2, page 29). Supply 50 + 24 V * Input signal: 0-20 ma, 4-20 ma, 0-10 V. ** Only 3-wire sensor. AI1 51 Input signal * GND 52 GND ** X10 CR, CRE AI2 (CU 351) PE2 Sensor for discharge pressure (section 16.2.2, page 29). Supply 53 + 24 V * Input signal: 0-20 ma, 4-20 ma, 0-10 V. ** Only 3-wire sensor. AI2 54 Input signal * GND 55 GND ** AI3 (CU 351) PE3 Flow sensor (section 16.2.2, page 29). AI3 57 GND ** The flow sensor has separate power supply. * Input signal: 0-20 ma, 4-20 ma, 0-10 V. GND 58 Input signal * ** Only 3-wire sensor. GENIbus (external) RS-485 A SCADA. RS-485 Y MODBUS, PROFIBUS, GSM-module RS-485 B CR, CRE DI1 (CU 351) DI3 (CU 351) DI1 10 GND 11 DI1 13 GND 14 24 V / 5 ma pulldown External fault (section 16.2.1, page 29). Possibility to send external stop signal to the CR Monitor. 24 V / 5 ma pulldown Resetting of alarm (section 16.2.1, page 29). Possibility to reset an alarm in the CR Monitor externally. X11 DO1 (CU 351) (C) 70 Relay, alarm (section 16.2.4, page 30). (NO) * 71 DO1 is always activated in case of alarms. * Optional, but normally (NC) is selected. (NC) * 72 DO2 (CU 351) (C) 73 Relay, alarm stop (section 16.2.4, page 30). (NO) * 74 To be connected to the start/stop input of the motor or CUE. DO2 is only activated if the function has been selected. (NC) * 75 * Optional, but normally (NO) is selected. CRE CR with CUE GENIbus (internal) RS-485 A1 To be connected to the CRE/CUE. RS-485 Y1 To be screened. RS-485 B1 LiqTec (Run) 91 To be connected to the digital input of CRE/CUE. (C) 92 To be set via R100 or PC Tool to "External fault". (AL) 93 10

Group Pump type Terminal Value Comments X14 CR, CRE AO4 (IO 351) AI1 (IO 351) AI2 (IO 351) DO4 (IO 351) DO5 (IO 351) 8.3 EMC-correct installation In order to ensure an EMC-correct installation, these guidelines for communication and signal cables must be followed: Leave the screen of the cable as close to the connecting terminals as possible. Fix the screen with a cable clamp. GND 17 Optional analog sensor. Output signal: AO4 18 0-10 V (section 16.2.5, page 31). Supply 53 + 24 V Temperature sensor (section 16.2.2, page 29). GND 55 GND ** * Input signal: 0-20 ma, 4-20 ma, 0-10 V. ** Only 3-wire sensor. AI1 57 Input signal * Supply 53 + 24 V Optional sensor (section 16.2.2, page 29). GND 55 GND ** * Input signal: 0-20 ma, 4-20 ma, 0-10 V. ** Only 3-wire sensor. AI2 60 Input signal * (NO) 82 Relay, warning (section 16.2.4, page 30). (C) 83 DO4 is always activated in case of warnings. (NO) 84 Relay, ready (section 16.2.4, page 30). (C) 85 The pump is running without a warning or an alarm. Brown/ To be connected to the LiqTec sensor of the pump. 1 black X15 CR, CRE LiqTec Blue 2 White 3 - CR, CRE Webserver Ethernet - To be connected directly to the CU 351 (RJ45). TM02 1325 0901 Fig. 11 Example of stripped cable with screen Connect the screen of communication and signal cables to frame at both ends. Screws for frame connections must always be tightened whether a cable is fitted or not. 8.4 Electrical connection Warning The electrical connection should be carried out by an authorised person in accordance with local regulations and the wiring diagram. The electrical installation must comply with enclosure class IP54. Make sure that the CR Monitor is designed for the electricity supply on which is will be used. Check that the conductor cross-section corresponds to the specifications in the wiring diagram. 11

9. Control panel The control panel in the front plate of the control cabinet consists of a display, a number of buttons and two indicator lights. The control panel offers these possibilities: to monitor the operating status of the pump to set the indication of pump status to set parameters for alarm to see the alarm log (history) to start/stop a new learning to set intervals for relubrication or replacement of motor bearings to configure inputs and outputs. 9.1 Display The display (pos. 1, fig. 12) of the CU 351 show the menu with status and settings. D A B Fig. 12 Control panel Legend Pos. Symbols 1-2 3 Display 4 Goes up in a list Goes to the next column in the menu structure Opens a help text for the display in question 5 Goes down in a list 6 Increases a value 7 Reduces a value 8 Goes one display back in the menu 9 Goes back to menu Status 10 11-12 - Indicator Indicator 1 CU 351 TM03 1304 1705 Starts the setting of a value or activates the value light, operation (green) light, fault (red) 13 Changes the contrast of the display 13 12 2 3 5 4 6 7 8 9 10 11 Fig. 13 Display design Menu line The menu line (A) shows the four main menus: Status Alarm Limits Installation Monitoring the operating status of the pump Alarm log for fault finding Setting of limits for fault handling Start/stop of learning, configuration of inputs and outputs, various system settings Top line The upper line (B) shows the following: number and title of the display (to the left) the menu selected (to the left) the symbol in case of alarm (to the right) the symbol if the service language has been selected (to the right). Graphical illustration The graphical display depends on the position in the menu structure: In displays with status indication, the status is shown in the upper half and menu elements in the lower half. In displays for setting and configuration of functions, each element is listed, and it is possible to set values and/or select and deselect functions. If not all elements can be shown in the display, the symbols and will be shown to the right in the scrollbar. Go up and down in a list with [ ] and [ ]. Lower line The bottom line (C) shows the following: the text "CR Monitor" during normal operation (to the left) the text "Learning started" during learning (flashing to the left) date and time (to the right). C 12

9.2 Buttons and indicator lights The buttons (pos. 2 to 10, fig. 12) of the CU 351 are active when they are lit. [>] (pos. 2) Goes to the next column in the menu structure. If the button is pressed while menu Installation is highlighted, you go to menu Status, etc. [?] (pos. 3) Opens a help text for the display in question. Close the help text with [esc]. [ ] and [ ] (pos. 4 and 5) Goes up and down in a list. A text can be selected when it is in a frame. [+] and [ ] (pos. 6 and 7) Increases or reduces a value. Activate the value with [ok]. [esc] (pos. 8) Goes one display back in the menu. If a value has been changed and [esc] is pressed, the new value will not be saved. Further information, see section [ok] (pos. 10), page 13. If [ok] is pressed before [esc], the new value will be saved. Further information, see section [ok] (pos. 10) below. [home] (pos. 9) Goes back to menu Status. The menu item shown last in menu Status will appear. [ok] (pos. 10) Is the enter button and used for starting the setting of a value. If a value has been changed and [ok] is pressed, the new value will be activated. Indicator lights (pos. 11 and 12) The control panel has a green and a red indicator light. The green indicator light is on when the pump is running. In the case of CRE and CR with a CUE, the green indicator light will be flashing if the pump has been set to stop. The red indicator light is on if there is an alarm or a warning. The fault can be identified from the alarm list. See section 14.2 Current alarms (2.1). Contrast (pos. 13) Changes the contrast of the display. 1. Press the button. 2. Adjust the contrast with [+] and [ ]. Backlight If the buttons are not touched for 15 minutes, the backlight of the display will be dimmed and the display shown last in menu Status will appear. Press any button to reactivate the backlight. 10. Start-up When the basic mechanical, electrical and hydraulic installation as described in section 8.1 Mechanical installation and 8.2 Connection to system have been carried out, then switch on the electricity supply, and wait for the first display to appear. Display language, measuring units, date and time are set in display 4.3. See section 16.3, page 32. 10.1 Setting of efficiency and cavitation monitoring 1. Analog sensors Setting of analog sensors (display 4.2.2, section 16.2.2, page 29). Sensors required for efficiency monitoring: Inlet and discharge pressure, flow rate. Sensors required for cavitation monitoring: Inlet pressure, flow rate and temperature. 2. Cavitation monitoring Setting of cavitation monitoring (display 4.1.2, section 16.1.2, page 28). Safety margin for NPSH R (cavitation limit). Liquid temperature monitoring via sensor. 3. Limits for sensor values Setting of warning and alarm limits for sensor values (display 3.1.1, section 15.1.1, page 23). Warning and alarm limits for each sensor. 4. Limits for monitoring functions Setting of warning and alarm limits for efficiency and cavitation monitoring (display 3.1.2, section 15.1.3, page 24). Warning and alarm limits for each function. 5. Learning Learning of operating characteristic (display 4.1.1, section 16.1.1, page 27) Start/stop of a new learning. Selection between active and passive learning. 11. Learning Learning of the operating characteristic of the pump is an essential part of the start-up of the CR Monitor. As it is reference for efficiency monitoring, learning must take place when the pump is running faultlessly under normal operating conditions. Consider these items before starting a learning: The pump must be running faultlessly. Measured data from flow and pressure sensors must be stable. Pump, motor and pumped liquid must have reached normal operating temperature. The pumped liquid must be the same during learning as during normal operation. Newly relubricated motor bearings may increase the power loss and must therefore have run for a while before starting a learning. Learning is carried out by letting the pump run at various duty points. To achieve sufficient learning, a duty point must be stable for about ten seconds. The algorithms of the CR Monitor can then calculate the operating characteristic of the pump between duty points learned. Caution Learning must be carried out within the permissible limits for pump and application! The pump must not cavitate when learning. 13

11.1 Forms of learning The CR Monitor can only monitor the operation in the ranges where learning has been carried out. When the learning has been finished, the CR Monitor will give a warning if the pump duty point moves outside the range learned. It is possible to resume learning if the pump is still running faultlessly. There are two forms of learning: active and passive learning. Active learning: The duty point is adjusted manually in the permissible pump duty range during learning. Passive learning: Learning takes place during normal pump operation and with a set learning time. In order to achieve the best possible monitoring, it is advisable to carry out an active learning in the expected duty range. Learning should not be carried out in ranges for which the system is not sized. The next sections describe active learning with pump in uncontrolled operating mode (open loop) and the considerations to make in the case of constant pressure operation. Learning is started and stopped in display Learning (4.1.1). See page 27. 11.1.1 Pump in open loop (active learning) The following procedure is based on the possibility of adjusting the discharge pressure of the pump (throttling). 1. Select "Start learning" under "Learning management". The display in fig. 14 will appear, and the text "Learning started" will flash in the lower menu line. bar Fig. 15 Active learning - open loop (extreme ends for learning) 6. Adjust the discharge pressure to achieve learning at duty points at suitable intervals (pos. 3 to 5, fig. 16) between the two ends of the curve. The number of necessary duty point, and thus the distance between the points, may vary, but the CR Monitor must be able to draw the operating characteristic of the pump between the two points. bar bar 1 100 % speed 5 4 3 2 m 3 /h 100 % speed m 3 /h 100 % speed m 3 /h TM04 3012 3508 TM04 3013 3508 TM04 3014 3508 Fig. 16 Active learning - open loop (point for learning) Steps 7 and 8 apply to speed-controlled pumps (CRE and CR with CUE): 7. Reduce the speed to a minimum to obtain a new duty point. See pos. 6, fig. 17. A new curve will be shown in the display. 8. Repeat step 7, but at an intermediate speed. See pos. 7, fig. 17. Fig. 14 Learning started 2. Go to display Q/H curve (1.2). See section 13.2. 3. Start the pump. A cross indicating the actual duty point of the pump will appear in the display. In the case of CRE and CR pumps with a CUE, set the motor to run at max. speed. 4. Adjust the discharge pressure so that the pump delivers a min. flow rate at a max. discharge pressure. See pos. 1, fig. 15. Caution The flow rate must be larger than 10 % of the nominal flow rate to prevent the liquid temperature in the pump from rising. bar bar 6 ~ 25 % speed m 3 /h TM04 3015 3508 5. Adjust the discharge pressure so that the pump delivers a max. flow rate at a min. discharge pressure. See pos. 2, fig. 15. The pump must not cavitate. It may be necessary to reduce the flow rate. ~ 65 % speed 7 m 3 /h TM04 3016 3508 Fig. 17 Active learning in open loop (variable speed) 14

9. The learning is complete and can be stopped in display Learning (4.1.1) by selecting "Stop learning". A display will be shown for ended learning, and the text "Learning started" will disappear from the lower menu line. Press [ok]. 11.1.2 Pump with constant discharge pressure Pumps set to delivering a constant discharge pressure will adjust the speed in relation to the flow rate. See fig. 18 ("SP" = setpoint). At 100 % speed, an increase of the flow rate will cause a lower pressure. The CR Monitor will only show the curve learned at the speed which can deliver the constant pressure at the flow rate required. bar SP 100 % speed 65 % speed 25 % speed Fig. 18 Constant pressure - complete learning m 3 /h TM04 3017 3508 11.1.3 Passive learning Passive learning should only be carried out if active learning is not possible. The CR Monitor will only carry out learning in the range where the pump runs during normal operation. When the learning has been finished, the CR Monitor will give a warning if the pump duty point moves outside the range learned. Passive learning can be expanded with a new duty range by recalling saved learning sets and resume the learning as described below. 1. Select "Learning time-out" under "Learning management", and set the desired learning time. Set the time-out so that all variations of the operating characteristic is included in the learning. 2. Select "Start learning". The display in fig. 14 will appear, and the text "Learning started" will flash in the lower menu line. 3. The CR Monitor will carry out a continuous learning. It is therefore important to make sure that the pump is running faultlessly while learning takes place. When learning has ended (either by time-out or manual stop), a display will be shown for ended learning, and the text "Learning started" will disappear from the lower menu line. The best learning in constant pressure systems is achieved if learning can be carried out in open loop as described above. If this is not possible, the second best solution is to carry out learning at minimum two discharge pressures. See fig. 19 (SP1 and SP2). bar SP2 SP1 m 3 /h Fig. 19 Constant pressure - learning at two setpoints TM04 3018 3508 This way, the operating characteristic is drawn between the two setpoints. This still provides a good basis for reliable efficiency monitoring. If it is only possible to carry out learning at one constant discharge pressure, the CR Monitor will only learn a limited part of the operating characteristic. See fig. 20. bar SP m 3 /h Fig. 20 Constant pressure - learning at one setpoint TM04 3019 3508 If the CR Monitor has only learned in one setpoint, it cannot give a direct warning/alarm if the efficiency is reduced. Instead, the CR Monitor will give the warning "Outside the range learned". It is then possible to evaluate if the duty point is outside the range learned, or if the warning is actually caused by reduced efficiency. 15

12. Functions The CR Monitor has four main menus: 1. Status The Status menu shows the operating status of the system and pump as well as historical data. : No settings can be made in this menu. 2. Alarm The Alarm menu gives an overview of alarms and warnings. Alarms and warnings can be reset in this menu. 3. Limits In menu Limits, the following settings can be made: Limits for warning and alarm and the reaction of the CR Monitor in case of fault. Intervals for maintenance of motor bearings. Values to be shown in the status display. 4. Installation In menu Installation, it is possible to set various functions: Starting and stopping learning. Saving, recalling and deleting learning sets. Setting of cavitation measurement. Configuration of digital and analog inputs and outputs. Selection of service language, display language and units. Setting of date and time, password, ethernet connection, GENIbus number and software status. 12.1 Functions tree 1. Status 1.1 System status 1.2 Q/H curve 1.3 Q/P curve 1.4 Efficiency curve 1.5 Cavitation curve 1.6 Measurements 1.7 Q/time histogram 1.8 Historical data 2. Alarm 2.1 Current alarms 2.2 Alarm log 3. Limits 3.1 Fault handling 3.1.1 Sensor measurements 3.1.1.1 Fault handling, flow measurement 3.1.1.2 Fault handling, inlet pressure measurement 3.1.1.3 Fault handling, discharge pressure measurement 3.1.1.4 Fault handling, diff. pressure measurement 3.1.1.5 Fault handling, power measurement 3.1.1.6 Fault handling, speed measurement 3.1.1.7 Fault handling, motor voltage measurement 3.1.1.8 Fault handling, liquid temperature measurement 3.1.1.9 Fault handling, optional-sensor measurement 3.1.2 Monitoring functions 3.1.2.1 Fault handling, efficiency 3.1.2.2 Fault handling, Q/H 3.1.2.3 Other fault handling 3.1.2.4 Fault handling, cavitation 3.1.3 Monitoring filters 3.1.4 Pump and IO 351 3.1.5 Other fault handling 3.1.6 General settings 3.2 Maintenance 3.3 Status display data 16

4. Installation 4.1 CR Monitor settings 4.1.1 Learning 4.1.1.1 Save learning set 4.1.1.2 Recall learning set 4.1.2 Cavitation 4.1.3 Maintenance 4.2 Input/output settings 4.2.1 Digital inputs 4.2.1.1 DI1... DI3 (CU 351), [10, 12, 14] 4.2.1.1 DI1... DI9 (IO 351), [12... 46] 4.2.2 Analog inputs 4.2.2.1 AI1... AI3 (CU 351), [51, 54, 57] Analog inputs and measured values 4.2.2.1 AI1, AI2 (IO 351), [57, 60] Analog inputs and measured values 4.2.3 Digital outputs 4.2.3.(1-2) DO1, DO2 (CU 351), [71, 74] 4.2.3.(3-9) DO2... DO7 (IO 351), [77... 88] 4.2.4 Analog outputs 4.3 Basic settings, CU 351 4.3.1 Display language 4.3.2 Units 4.3.2.1 Pressure 4.3.2.2 Differential pressure 4.3.2.3 Head 4.3.2.4 Level 4.3.2.5 Flow rate 4.3.2.6 Temperature 4.3.2.7 Power 4.3.3 Date and time 4.3.4 Password 4.3.5 Ethernet 4.3.6 GENIbus number 4.3.7 Software status 17

12.2 Overview In the next sections, displays and functions will be described in the order they appear in the menus. Section Display and No See page 13. Status (1) 19 13.1 System status (1.1) 19 13.2 Q/H curve (1.2) 19 13.3 Q/P curve (1.3) 19 13.4 Efficiency curve (1.4) 20 13.5 Cavitation curve (1.5) 20 13.6 Measurements (1.6) 20 13.7 Q/time histogram (1.7) 20 13.8 Historical data (1.8) 21 14. Alarm (2) 21 14.1 Alarm status (2) 21 14.2 Current alarms (2.1) 21 14.3 Alarm log (2.2) 22 15. Limits (3) 22 15.1 Fault handling (3.1) 22 15.1.1 Sensor measurements (3.1.1) 23 15.1.2 Example: Fault handling, flow measurement (3.1.1.1) 23 15.1.3 Monitoring functions (3.1.2) 24 15.1.4 Example: Fault handling, efficiency (3.1.2.1) 24 15.2 Monitoring filters (3.1.3) 25 15.2.1 Pump and IO 351 (3.1.4) 25 15.2.2 Other fault handling (3.1.5) 25 15.2.3 General settings (3.1.6) 26 15.3 Maintenance (3.2) 26 15.4 Status display data (3.3) 26 16. Installation (4) 27 16.1 CR Monitor settings (4.1) 27 16.1.1 Learning (4.1.1) 27 16.1.2 Cavitation (4.1.2) 28 16.1.3 Maintenance (4.1.3) 28 16.2 Input/output settings (4.2) 28 16.2.1 Digital inputs (4.2.1) 29 16.2.2 Analog inputs (4.2.2) 29 16.2.4 Digital outputs (4.2.3) 30 16.2.5 Analog outputs (4.2.4) 31 16.3 Basic settings, CU 351 (4.3) 32 16.3.1 Display language (4.3.1) 32 16.3.2 Units (4.3.2) 32 16.3.3 Date and time (4.3.3) 33 16.3.4 Password (4.3.4) 33 16.3.5 Ethernet (4.3.5) 33 16.3.6 GENIbus number (4.3.6) 34 16.3.7 Software status (4.3.7) 34 18

13. Status (1) No settings can be made in this menu. If the buttons of the control panel have not been touched for 15 minutes, the display will return to the display shown last in menu Status. 13.2 Q/H curve (1.2) 13.1 System status (1.1) When the CR Monitor is switched on, this display will be shown. C A B D Fig. 22 Q/H curve Fig. 21 System status The operating status of the pump in relation to the operating characteristic learned is shown by means of text (A) and relevant graphics (B) at the top of the display. There is this connection between text and graphics: E This status display shows the duty point of the pump at the actual speed in relation to a operating characteristic learned. During normal operation, this point will be somewhere on the curve learned. If the point is under the curve, this may indicate a fault or changed operating conditions. For setting of warning and alarm limits for the operating characteristic learned, see section 15.1.3 Monitoring functions (3.1.2). 13.3 Q/P curve (1.3) CR Monitor status Graphical symbol (B) Normal operation Warning Alarm! X If a fault has occurred, the symbol will be shown to the right of the upper line (C). The symbol will be shown in all displays as long as the fault exists. For information about fault cause, see section 14.2 Current alarms (2.1) and 14.3 Alarm log (2.2). It is possible to show up to five status values (D). See section 15.4 Status display data (3.3). The lower display half (E) shows these data: actual duty point for pressure, power, efficiency and cavitation margin in relation to the flow rate of the duty point learned measured values of various operating parameters histogram of the operating pattern of the pump statistics for the CU 351 and the pump as well as intervals for relubrication and replacement of motor bearings. Fig. 23 Q/P curve This status display shows the motor input power (P1) at the actual duty point. The point will be shown together with the operating characteristic learned. During normal operation, this point will be somewhere on the curve learned. If the point is above the curve, this may indicate a fault or changed operating conditions. For setting of warning and alarm limits for the operating characteristic learned, see section 15.1.3 Monitoring functions (3.1.2). 19

13.4 Efficiency curve (1.4) 13.6 Measurements (1.6) Fig. 24 Efficiency curve This status display shows the total pump efficiency at the actual duty point. The point will be shown together with the operating characteristic saved. During normal operation, this point will be somewhere on the curve learned. If the point is under the curve, this may indicate a fault or changed operating conditions. For setting of warning and alarm limits for the operating characteristic learned, see section 15.1.3 Monitoring functions (3.1.2). Fig. 26 Measurements This display shows actual and calculated values of pump performance and operating conditions. 13.7 Q/time histogram (1.7) 13.5 Cavitation curve (1.5) Fig. 27 Q/time histogram Fig. 25 Cavitation curve This status display shows the NPSH A value of the pump at the actual duty point. The point will be shown in relation to the cavitation curve of the pump (NPSH R ) under the actual operating conditions. In order to prevent cavitation, the duty point must be above the curve. The NPSH value calculated applies only to clean water. The actual distance between the inlet pressure and the cavitation curve can be read in the next display, Measurements (1.6). For setting of warning and alarm limits for cavitation monitoring, see section 15.1.3 Monitoring functions (3.1.2). Sizing of correct pump size as to cavitation is described in the data booklet "CR, CRI, CRN, CRE, CRIE, CRNE". This status display shows a histogram of the various flow ranges where the pump has been running. The histogram shows an accumulated duty time (y-axis) at various flow rates (x-axis). For speed-controlled pumps, every flow range may be divided into several grey tones. The grey tones show at which speeds the pump has been running at the various flow rates. The table below shows the connection between grey tone, motor frequency and speed. (Motor slip is not included.) Grey tone Motor frequency, f m [Hz] Speed [min -1 ] 0 < f m 20 0-1200 20 < f m 30 1201-1800 30 < f m 40 1801-2400 f m > 40 2401-20

13.8 Historical data (1.8) 14.2 Current alarms (2.1) Fig. 28 Historical data This status display shows various statistical data of the pump and the CUE 351. 14. Alarm (2) Menu Alarm gives an overview of alarms and warnings. In this menu, it is possible to reset alarms and to read the alarm log. 14.1 Alarm status (2) Fig. 29 Alarm status Fig. 30 Current alarms This display shows warnings caused by faults that still exist. alarms caused by faults that still exist. alarms caused by faults that have disappeared, but the alarm requires manual resetting. All warnings and alarms with automatic resetting are automatically removed from the display when the fault has disappeared. Alarms requiring manual resetting are reset in this display by pressing [ok]. An alarm cannot be reset until the fault cause has disappeared. For every warning or alarm, the following is shown: Whether it is a warning or an alarm. Where the fault occurred. Sensor type (flow rate, pressure, etc.), external fault, communication fault, etc. In the case of input-related faults, the identity of the input is shown. What the fault cause is, followed by a fault code in parentheses. When the fault occurred: Date and time. When the fault disappeared: Date and time. If the fault still exists, date and time will be shown as --...--. The latest warning/alarm is shown at the top of the display. If an SMS box for the CR Monitor has been selected, fault messages can be sent by SMS. A fault in the system or an exceeded limit value can cause an alarm or a warning in the CR Monitor. Besides the fault indication via the relay for alarm/warning and the read indicator light on the CU 351, an alarm can be set to activating a relay for alarm stop. This is done in menu Limits. A warning only causes a fault indication. The two submenus show warnings or alarms together with a fault code. The service instructions of the CR Monitor include a complete fault-finding table with all fault codes and a description of fault, cause and remedy. 21

14.3 Alarm log (2.2) The alarm log can store up to 24 warning and alarms. 15.1 Fault handling (3.1) The menu is divided into six submenus: Sensor measurements Monitoring functions Monitoring filters Pump and IO 351 Other fault handling General settings. Fig. 31 Alarm log For every warning or alarm, the following is shown: Whether it is a warning or an alarm. Where the fault occurred. Flow sensor, external fault, communication fault, etc. In the case of input-related faults, the identity of the input is shown. What the fault cause is, followed by a fault code in parentheses. When the fault occurred: Date and time. When the fault disappeared: Date and time. If the fault still exists, date and time will be shown as --...--. The latest warning/alarm is shown at the top of the display. 15. Limits (3) In menu Limits, one of the submenus can be selected: Fault handling Maintenance Status display data. Fig. 33 Fault handling Display "Sensor measurements" makes it possible to set warning and alarm limits for each sensor/measuring point and to set how the CR Monitor is to react. "Monitoring functions" makes it possible to set limits for warning and alarm if the duty point moves outside the range learned. "Monitoring filters" makes it possible to set how long measured data may be unstable before a warning is given. It is also possible to set whether the CR Monitor is to send an SMS and/or e-mail if measured data are unstable, and if the duty point is outside the range learned. "Pump and IO 351" makes it possible to set how the CR Monitor is to react to warnings and alarms from the pump, IO 351 and sensor faults. "Other fault handling" makes it possible to set how CR Monitor is to react to external faults and faults in the electronic components. "General settings" makes it possible to set how the CR Monitor is to react if the number of restarts is too high. Fig. 32 Limits "Fault handling" makes it possible to set how the CR Monitor is to react if a sensor value exceeds a set warning and/or alarm limit or the pump moves outside the range learned. "Maintenance" shows when it is time to relubricate or replace motor bearings. "Status display data" makes it possible to select what values are to be shown in display Status (1). 22

}1 15.1.1 Sensor measurements (3.1.1) It is possible to set min. and max. warning and alarm limits for each of the sensors below as well as how the CR Monitor is to react to faults. If the value for warning or alarm limits is changed, the function will be selected automatically. The setting of min. and max. warning or alarm limits can be illustrated this way: [ma] [ma] [V] 20 20 10 3 2 4 } 1 5 0 4 0 TM04 2965 3508 Fig. 34 Sensor measurements The submenus for each sensor has the same structure. In the next section, the possible settings for fault handling in connection with flow measurement will be described as a general example. 15.1.2 Example: Fault handling, flow measurement (3.1.1.1) The menu offers these possibilities of handling an exceeded limit. Selection and setting of min. and max. alarm limits and the reaction of the CR Monitor. Selection and setting of min. and max. warning limits. Possibility of sending warnings and alarms as SMS (only with optional module) and/or e-mail. (To be set via PC Tool.) Fig. 36 Min. and max. limits 1 Normal duty range 2 Max. warning limit 3 Max. alarm limit 4 Min. warning limit 5 Min. alarm limit Example of limits for flow rate: bar 5 4 2 3 m 3 /h TM04 3007 3508 Fig. 37 Flow limits on a Q/H curve Fig. 35 Fault handling, flow measurement The CR Monitor comes with a hysteresis band for each limit. The purpose is to prevent repeated warnings/alarms caused by small variations of sensor values close to a limit. (The hysteresis band can be changed via PC Tool.) If an alarm limit is exceeded, the CR Monitor can be set to give an alarm and stop the pump, if required. It is generally advisable to let the pump continue to run in case of alarm. If "Stop in case of alarm" has been selected, the pump must be started manually or set to "Auto restart". When the sensor value is within the normal range again (the alarm disappears), the CR Monitor will try to restart the pump after a set time delay. For setting of time delay, see section 15.2.3 General settings (3.1.6). Indication in "Alarm status" (2) Warnings and alarms in connection with sensor measurements will be shown this way in 14.2 Current alarms (2.1) and 14.3 Alarm log (2.2): Warning An exceeded warning limit will be shown in Current alarms (2.1) and saved in Alarm log (2.2). The icon will be shown to the right of the upper line. If the sensor value comes within the normal range again, the warning will disappear from Current alarms (2.1). The icon will disappear. A warning indicating that the maintenance interval has been exceeded must be reset when maintenance has been carried out (section 15.3 Maintenance (3.2)). 23

Alarm An exceeded alarm limit will be shown in 14.2 Current alarms (2.1) and 14.3 Alarm log (2.2). The icon will be shown to the right of the upper line. If "Stop in case of alarm" has been selected, the pump will stop if the limit is exceeded. If "Auto restart" has not been selected, the pump cannot start until the sensor value is within the limit and the alarm has been reset. See section 14.2 Current alarms (2.1). The icon will be shown until the alarm has been reset. If "Auto restart" has been selected and the sensor value is within the limit, the pump will start and the alarm will disappear from Current alarms (2.1). The icon will disappear. For setting of "Auto restart", see section 15.2.3 General settings (3.1.6). If alarm indication has not been selected, the CR Monitor will not react to the alarm and other settings. Forced operation If the CR Monitor has stopped the pump because of an alarm and the operator wants to force the pump into operation, the function "Stop in case of alarm" must be deactivated for the sensor in question. 15.1.3 Monitoring functions (3.1.2) It is possible to set limits for warning and alarm if the duty point moves outside the range learned. These parameters are monitored: pump efficiency flow rate and pressure flow rate and input power cavitation. The CR Monitor can be set to different reactions to alarm for each parameter. 15.1.4 Example: Fault handling, efficiency (3.1.2.1) The menu offers these possibilities of handling an exceeded limit. Selection and setting of an alarm limit and the reaction of the CR Monitor. Selection and setting of warning limit. Possibility of sending warnings and alarms as SMS (only with optional module) and/or e-mail. (To be set via PC Tool.) Fig. 39 Fault handling, efficiency The actual pump performance will be compared with the operating characteristic learned. This requires that learning has been carried out as described in section 11. Learning. If the value for warning or alarm limits is changed, the function will be selected automatically. The limit value set displaces the warning and alarm curve vertically by the value selected. See fig. 40. Learned and actual value are always compared at the same flow rate. [%] 5 % Alarm limit: 5 % 5 % m 3 /h TM04 3043 3508 Fig. 38 Monitoring functions The submenus for each parameter has the same structure. In the next section, the possible settings for alarm handling in connection with efficiency will be described as a general example. Fig. 40 Alarm limit The CR Monitor comes with a hysteresis band for each limit. The purpose is to prevent repeated warnings/alarms caused by small variations of sensor values close to a limit. (The hysteresis band can be changed via PC Tool.) If an alarm limit is exceeded, the CR Monitor can be set to give an alarm and stop the pump, if required. It is generally advisable to let the pump continue to run in case of alarm. If "Stop in case of alarm" has been selected, the pump must be started manually or set to "Auto restart". When the sensor value is within the normal range again (the alarm disappears), restarting will be attempted after a set time delay. Setting of time delay, see section 15.2.3 General settings (3.1.6). 24

Indication in "Alarm status" (2) Warnings and alarms in connection with sensor measurements will be shown this way in 14.2 Current alarms (2.1) and 14.3 Alarm log (2.2): Warning An exceeded warning limit will be shown in Current alarms (2.1) and saved in Alarm log (2.2). The icon will be shown to the right of the upper line. If the sensor value comes within the normal range again, the warning will disappear from Current alarms (2.1). The icon will disappear. A warning indicating that the maintenance interval has been exceeded must be reset when maintenance has been carried out (section 15.3 Maintenance (3.2)). Alarm An exceeded alarm limit will be shown in 14.2 Current alarms (2.1) and 14.3 Alarm log (2.2). The icon will be shown to the right of the upper line. If "Stop in case of alarm" has been selected, the pump will stop if the limit is exceeded. If "Auto restart" has not been selected, the pump cannot start until the sensor value is within the limit and the alarm has been reset. See section 14.2 Current alarms (2.1). The icon will be shown until the alarm has been reset. If "Auto restart" has been selected and the sensor value is within the limit, the pump will start and the alarm will disappear from Current alarms (2.1). The icon will disappear. For setting of "Auto restart", see section 15.2.3 General settings (3.1.6). If alarm indication has not been selected, the CR Monitor will not react to the alarm and other settings. If the CR Monitor has stopped the pump because of an alarm and the operator wants to force the pump into operation, the function "Stop in case of alarm" must be deactivated for the sensor in question. 15.2 Monitoring filters (3.1.3) Possible settings: Setting of max. time with unstable before the CR Monitor is to give a warning. Sending of SMS and/or e-mail if measured data are unstable, and if the duty point is outside the range learned. Fig. 41 Monitoring filters Data are stable when all measured values for the monitoring functions have not changed their level within a given period. If this cannot be achieved within a set time, the CR Monitor will give a warning. The CR Monitor will always give a warning if the duty point is outside the range learned. 15.2.1 Pump and IO 351 (3.1.4) Fault indications from the pump (CRE), CUE (CR) or MP 204 (CR) are monitored. The CR Monitor can be set to give an alarm if the pump stops in case of a fault. This fault is generated by the pump (CRE), CUE (CRE) or MP 204 (CR). The CR Monitor can be set to activate a relay for alarm stop. The CRE and CUE must be set to automatic resetting of alarms. The CR Monitor can be set to give an alarm if there is a fault in the IO 351 and/or sensors. The CR Monitor can be set to activate a relay for alarm stop. Possibility of sending warnings and alarms as SMS (only with optional module) and/or e-mail. (To be set via PC Tool.) Fig. 42 Pump and IO 351 Depending on the setting, the CR Monitor can react to fault indications from the CRE or MP 204 (CR). The setting of the CR Monitor does not change the fault setting of the CRE or MP 204. 25

15.2.2 Other fault handling (3.1.5) Possible settings: Setting of reaction to external fault (digital input) Setting of time delay before fault indication Setting of reaction to other faults (ethernet, memory, hardware) Possibility of sending warnings and alarms as SMS (only with optional module) and/or e-mail. (To be set via PC Tool.) 15.3 Maintenance (3.2) Here the operator can register relubrication or replacement of motor bearings. Possible settings: Sending of SMS (only with optional module) and/or e-mail when it is time to relubricate or replace motor bearings. (To be set via PC Tool.) Fig. 43 Other fault handling It is possible to select "Stop in case of alarm" and "Auto restart" in case of fault. A time delay can be set between the detection of an external fault and the reaction of the CR Monitor. 15.2.3 General settings (3.1.6) Possible settings: Number of restarts before the CR Monitor is to give an alarm Stop if the max. number of restarts is exceeded Possibility of sending alarms as SMS (only with optional module) and/or e-mail. (To be set via PC Tool.) Setting of general restart delay. Fig. 45 Maintenance The CR Monitor will give a warning when it is time to relubricate or replace motor bearings. See section 16.1.3 Maintenance (4.1.3). In this display, the operator can register that motor bearings have been relubricated or replaced. The status display Historical data (1.8) shows the time until the next relubrication or replacement. It is only shown if monitoring of motor bearings has been selected. 15.4 Status display data (3.3) In this display, the values to be shown in the status display are selected. See section 13.1 System status (1.1). Fig. 46 Status display data Fig. 44 General settings If the number of restarts exceeds the number set, the CR Monitor will give an alarm. If "Stop in case of alarm" has been selected, the relay for alarm stop will be activated. In the case of faults where auto restart is possible, the CR Monitor will try to restart the pump after a set time delay when the fault cause has disappeared. Five status values can be shown in the status display. If more than five status values are selected, only the top five will be shown. 26

16. Installation (4) 16.1.1 Learning (4.1.1) Learning is used for comparing the actual duty point with an operating characteristic learned. Setting of warnings and alarms if the duty point deviates from the operating characteristic learned, see section 15.1.3 Monitoring functions (3.1.2). Possibilities in this menu: To start/stop a new learning To delete a current learning To set the learning time of the pump To save and recall an operating characteristic learned. Check that the pump is running faultlessly before starting and carrying out learning. Fig. 47 Installation In menu Installation, it is possible to set these functions: CR Monitor settings Start and stop learning. Save, recall and delete learning sets. Settings in connection with cavitation and pump maintenance. Input/output settings Setting of digital and analog inputs and outputs. Basic settings, CU 351 Selection of service language, display language and units, setting of date and time, password, ethernet connection, GENIbus number and software status. 16.1 CR Monitor settings (4.1) There are three submenus: Learning Cavitation Maintenance. Fig. 49 Learning The display is divided into two categories: Learning management Selection of submenu for storing and recalling learning sets. Learning management Here a new learning can be started, stopped and deleted. Start and stop of learning is described in section 11. Learning. It is possible to delete the current learning set in order to carry out a new learning. Submenus In submenu "Save learning set", it is possible to save up to five learning sets. The learning set which the CR Monitor is using for monitoring the pump will be shown with a time stamp. If the CR Monitor is learning, the time stamp will be --. Fig. 48 CR Monitor settings In submenu "Learning", it is possible to start and stop learning as well as to save and recall operating characteristics learned. In submenu "Cavitation", the safety margin and liquid temperature monitoring are set. In submenu "Maintenance", the operator can set when to relubricate or replace motor bearings. Fig. 50 Save learning set When a learning is stopped manually or after time-out, the operating characteristic learned can be saved at an optional position. Recall learning set In this menu, a previously saved learning set can be recalled and used for monitoring the pump. 27

Learning sets saved have a time stamp. 16.1.3 Maintenance (4.1.3) Possible settings: Selection of monitoring of motor bearings Setting of max. number of relubrications before bearing replacement Lubricating intervals. Fig. 51 Recall learning set 16.1.2 Cavitation (4.1.2) Possible settings: Safety margin for cavitation curve Selection/deselection of liquid temperature monitoring via sensor. Fig. 53 Maintenance Relubrication of motor bearings is only possible for motors 7.5 kw. The monitoring function has been activated from factory for these motor sizes. The factory setting includes these settings: How many times the bearings may be relubricated before replacement. How often the bearings are to be relubricated. It is possible to change the factory setting. For further information about lubrication, see the instructions of the motor in question. The function can also be selected for motors 5.5 kw, but relubrication of motor bearings is not possible for these motors. Fig. 52 Settings for cavitation monitoring The value next to "NPSH safety margin" is added to the NPSH value required (NPSH R ). Limits for warning and alarm are to be set according to NPSH R + the safety margin. See section 15.1.3 Monitoring functions (3.1.2). If the liquid temperature is measured by a sensor, the box "Use constant liquid temperature" must be empty. The cavitation curve is changed in relation to the actual temperature. If the box "Use constant liquid temperature" has been ticked, the temperature of the pumped liquid must be entered. 16.2 Input/output settings (4.2) In this menu, the various analog and digital signal transmitters are configured. The menu consists of these submenus: Digital inputs Analog inputs Digital outputs Analog outputs. Constant liquid temperature is only used if it is known and constant. If the liquid temperature exceeds the value set, the pump may cavitate without a warning and/or alarm from the CR Monitor. Fig. 54 Input/output settings 28

16.2.1 Digital inputs (4.2.1) In this menu, the three digital inputs of the CU 351 and the nine digital inputs of the IO 351 are shown. DI1 and DI3 are connected to the terminal blocks. With the standard configuration in section 8.2 Connection to system, the digital inputs must be configured as follows: DI1 (CU 351) [10] - (External fault) DI3 (CU 351) [14] - (Resetting of alarm). In the case of CR pumps with star-delta starting, the factory configuration of DI2 (CU 351) is: DI2 (CU 351) [12] - (The pump is running (Y/D)). DI2 is not used for a CR pump without star-delta starting, a CRE pump and a CR pump supplied by a CUE. 16.2.2 Analog inputs (4.2.2) In this menu, the analog inputs of the CR Monitor are shown. With the standard configuration in section 8.2 Connection to system, the digital inputs must be configured as follows: AI1 (CU 351) [51] - (Inlet pressure) AI2 (CU 351) [54] - (Discharge pressure) AI3 (CU 351) [57] - (Flow rate) AI1 (IO 351) [57] - (Liquid temperature) * AI2 (IO 351) [60] - (Optional sensor). * * Only to be configured if the sensor is to be used. Fig. 57 Analog inputs Fig. 55 Digital inputs Change of settings Each input can be activated and linked to a certain function. Select a digital input with [ ] and [ ], and press [ok]. This display will appear: Each input can be activated and linked to a certain function. In the display, all analog inputs are shown so that their physical position in the CR Monitor can be identified. Example: AI1 (IO 351-41), [57] AI1: Analog input No 1 (IO 351-41): IO 351, GENIbus number 41 [57]: Terminal No 57 16.2.3 Analog inputs and measured values (4.2.2.1) In these menus, the analog inputs are configured. The display below shows an analog input which has not been configured yet. If "Not used" is selected, the analog input will be deactivated. Fig. 56 Digital inputs and functions Select the function to be linked to the input with [ ] and [ ], and press [ok]. In the display, all digital inputs are shown so that their physical position in the CR Monitor can be identified. Example: DI1 (CU 351), [10] DI1: Digital input No 1 (CU 351): CU 351 [10]: Terminal No 10 Fig. 58 Analog input: Sensor measuring range 29

Procedure First, set the input signal according to the sensor signal range. The CR Monitor supports these signal ranges: 0-20 ma 4-20 ma 0-10 V. Select the sensor signal range with [ ] and [ ], and press [ok]. This display will appear: Select sensor type with [ ] and [ ], and press [ok]. Press [esc], and return to the display for setting the analog inputs: Fig. 61 Analog input: Sensor measuring range Fig. 59 Analog input: Measured input value The setting depends on the sensor type. Go to "Measured input value" with [ ] and [ ], and press [ok]. This display will appear: Finally, set the min. and max. values of the sensor measuring range. 1. Select "Min." or "Max." with [ ] and [ ], and press [ok]. 2. Increase or reduce a value with [+] and [ ], and press [ok]. Repeat this procedure for all analog inputs until the setting corresponds to fig. 57. 16.2.4 Digital outputs (4.2.3) In this menu, the two digital outputs of the CU 351 and the seven digital outputs of the IO 351. The digital inputs of the CR Monitor are factory-set according to the standard configuration in section 8.2 Connection to system: DO1 (CU 351) [71] - (Relay, alarm) DO2 (CU 351) [74] - (Relay, alarm stop) DO4 (IO 351) [82] - (Relay, warning) DO5 (IO 351) [84] - (Relay, ready) It is possible to configure an operating signal relay for a digital output. This is not set from factory. Fig. 60 Analog input: Sensor type Fig. 62 Digital outputs 30

The relays of the digital outputs will be activated in these cases: The CR Monitor is not supplied with current. The CR Monitor is ready, but the pump does not run. The pump is running within the range learned. Set warning limit exceeded. The pump is running outside the range learned. General warning in the CR Monitor Set warning limit exceeded. - "Stop in case of alarm" not selected. Set warning limit exceeded. - "Stop in case of alarm" selected. * The relay will only be activated if a set warning limit is exceeded. Change of settings One or several outputs can be activated by linking it/them to a certain function. Outputs can be deactivated by selecting "No function". Select a digital output with [ ] and [ ], and press [ok]. This display will appear: Relay, ready Operating signal relay Relay, warning Relay, alarm Relay, alarm stop - - - - - x - - - - x x - - - - x x - - - x (x)* x - - - (x)* x x 16.2.5 Analog outputs (4.2.4) In this display, the analog outputs of the CR Monitor can be configured to show one of these parameters: flow rate inlet pressure discharge pressure differential pressure liquid temperature value from optional sensor motor current power speed. Fig. 64 Analog outputs Select the function to be linked to the output with [ ] and [ ], and press [ok]. The display will not show the physical position of the analog output in the CR Monitor. Output signal If the input is connected to one of the analog sensors mentioned in section 16.2.2 Analog inputs (4.2.2), the output signal will correspond to the setting of the sensor. See section 16.2.3 Analog inputs and measured values (4.2.2.1). The output signal of analog outputs for motor current, power and speed will correspond to the range from 0 to the nominal value. Analog output Output signal 0 V 5 V 10 V Motor current 0 A I nom. 2 x I nom. Fig. 63 Digital outputs and functions Power P2 0 kw P nom. 2 x P nom. Speed 0 Hz 50 Hz 100 Hz Select the function to be linked to the output with [ ] and [ ], and press [ok]. In the display, all digital outputs are shown so that their physical position in the CR Monitor can be identified. Example: DO1 (CU 351), [71] DO1: Digital output No 1 (CU 351): CU 351 [71]: Terminal No 71 31

16.3 Basic settings, CU 351 (4.3) In this submenu, it is possible to make the basic settings of the CU 351: Activation of service language, British-English Selection of display language Selection of units Setting of date and time Selection of password for the menus Limits and Installation Setting of ethernet communication Setting of GENIbus number Reading of software status. Here the display language for the CU 351 is selected. Possible settings: British-English German Danish Spanish French Portuguese. Factory setting The display language is British-English. It can be changed at start-up. 16.3.2 Units (4.3.2) Here it is possible to select with what units the various measuring parameters are to be shown in the display. Fig. 65 Basic settings, CU 351 The CU 351 comes with most basic settings, or they are made at start-up and normally not to be changed. The service language, British-English, can be activated for service purposes. If the service language is selected, the symbol will be shown to the right of the upper line of all displays. If the buttons are not touched for 15 minutes, the display will return to the language selected at start-up or to the language selected in 16.3.1 Display language (4.3.1). 16.3.1 Display language (4.3.1) Fig. 66 Display language Fig. 67 Units For the basic setting it is possible to select between SI and US units. It is also possible to select other units for the individual parameters. Setting range Parameter Basic setting Factory setting CU 351 has been set to SI units from factory. SI US Pressure bar psi Possible units kpa, MPa, mbar, bar, m, psi Differential pressure m psi kpa, MPa, mbar, bar, m, psi Head m ft m, cm, ft, in Level m ft m, cm, ft, in Flow rate m 3 /h gpm m 3 /s, m 3 /h, l/s, gpm, yd 3 /s, yd 3 / min, yd 3 /h Temperature C F K, C, F Differential temperature K K K Power kw HP W, kw, MW, HP If units are changed from SI to US or vice versa, all individually set parameters are changed to the basic setting in question. 32

16.3.3 Date and time (4.3.3) In this menu, date and time are set as well as how they are to be shown in the display. 16.3.4 Password (4.3.4) In this menu display it is possible to limit the access to the menus Limits and Installation by means of a password. Fig. 68 Date and time The clock has a built-in rechargeable voltage supply which can supply the clock for up to 20 days if the voltage supply to the CR Monitor is interrupted. If the clock is without voltage for more than 20 days, it must be set again. Setting range The date can be set as day, month and year. The time can be set as a 24-hour clock showing hours and minutes. There are three formats. Examples of format 2005-09-27 13:49 27-09-2005 13:49 9/27/2005 1:49pm Factory setting Local time. If the CR Monitor has been without voltage for more than 20 days since it left the factory, the clock may have returned to the original setting: 01-01-2005 0:00. Date and time may have been changed during the setting of the CR Monitor. There is no automatic changeover to/from daylight-saving time. Fig. 69 Password If the access is limited, it will not be possible to see or set parameters in the menus. The password must consist of four digits and may be used for both menus. Contact Grundfos if you have forgotten your password. Setting via control panel 1. Select the password to be activated, and press [ok]. 2. Select "Enter password", and press [ok]. Now the first digit of the password is flashing. 3. Select digit with [+] and [ ], and save with [ok]. Now the second digit of the password is flashing. 4. Repeat points 1 to 3 if the other password is to be activated. Factory setting Both passwords are deactivated. If a password is activated, the factory setting will be "1234". 16.3.5 Ethernet (4.3.5) Fig. 70 Ethernet The CU 351 is equipped with an ethernet connection for communication with a computer, either directly or via internet. Further information, see section 17.1 Ethernet. 33

16.3.6 GENIbus number (4.3.6) Here a GENIbus number for external communication can be set. Fig. 71 GENIbus number The CR Monitor can be connected to a network and become a part of a superior SCADA system. Further information, see fig. 73 and section 17.2 GENIbus. The communication is carried out according to GENIbus, the Grundfos bus protocol, and enables connection to a building management system or another external control system. Operating parameters can be set via the bus signal. Furthermore, status of important parameters and fault indications can be read from the CU 351. Contact Grundfos for further information. Setting range The number can be set between 1 and 64. Setting via control panel 1. Select "GENIbus number" with [+] and [ ], and press [ok]. 2. Select number with [+] and [ ], and save with [ok]. Factory setting 231. 16.3.7 Software status (4.3.7) Fig. 72 Software status This display shows the software installed in the CU 351 and IO 351. Furthermore, the version code and the version numbers of the configuration files (GSC) read into the unit are shown. As it is a status display, no settings can be made. 34

17. Data communication The CU 351 is equipped with a hardware enabling communication with external units, such as a computer, via an external GENIbus or ethernet connection. Third-party gateway Grundfos G100 gateway Grundfos CIU unit Intranet Internet External GENIbus connection CU 351 External GENIbus module (factory option) Ethernet connection TM04 3161 3808 Fig. 73 Data communication via external GENIbus and ethernet connection 17.1 Ethernet Ethernet is the most widely used standard for local networks (LAN). The standardization of this technology has created some of the easiest and cheapest ways of creating communication between electrical units, for instance between computers or between computers and control units. The web server of the CU 351 makes it possible to connect a computer to the CU 351 via an ethernet connection. The interface can thus be exported from the CU 351 to a computer so that the CU 351 and consequently the system set can be monitored and controlled externally. Grundfos recommends that you protect the connection to the CU 351 in consultation with the system administrator according to your safety requirements. In order to use the web server, you must know the IP address of the CU 351. All network units must have a unique IP address in order to be able to communicate with each other. It is possible to change the factory-set IP address by configuration or by activating a DHCP (Dynamic Host Configuration Protocol) either directly in the CU 351 or via the web server. See the example in fig. 74. Dynamic assignment of an IP address for the CU 351 requires a DHCP server in the network. The DHCP server assigns a number of IP addresses to the electrical units and makes sure that two units do not receive the same IP address. A traditional internet browser is used when connecting to the web server of the CU 351. If you want to use the factory-set IP address, no changes are required in the display. Open the internet browser, and enter the IP address of the CU 351. In order to use dynamic assignment, the function must be activated. Click [ok] "Use DHCP" in the menu line. A check mark next to the menu line shows that the function has been activated. Open internet, and enter the host name of the CU 351 instead of the IP address (the host name is stated at the top of display 4.3.5). The internet browser will now try to establish connection to the CU 351. The host name can only changed by means of a GSC file (configuration file) or via a web server. See Change of network setting on page 36. DHCP requires a host name. This is the first display to be shown when connecting to the CU 351. TM03 2048 3505 Fig. 74 Example of ethernet setting Fig. 75 Connection to the CU 351 35

Factory setting User name: admin Password: admin When user name and password have been entered, a Java Runtime Environment application will start up in the CU 351, provided that it has been installed on the computer in question. If this is not the case, but the computer is connected to internet, then use the link on the screen to download and install the Java Runtime Environment application. Change of network setting When connection to the web server of the CU 351 has been established, it is possible to change the network setting. Fig. 76 Display with link to Java Runtime Environment The Java Runtime Environment application now transfers the user interface of the CU 351 (including display and control panel) to the computer screen. It is now possible to monitor and control the CU 351 from the computer. TM03 2049 3505 Fig. 78 Change of network setting 1. Click the icon "Network admin". 2. Make the changes. 3. Click [Submit] to activate the changes. Change of password TM03 2050 3505 Fig. 77 Network setting TM04 3045 3508 TM03 2051 3505 Fig. 79 Change of password 1. Click the icon "Change password". 2. Enter the new password. 3. Click [Submit] to activate the new password. 17.2 GENIbus By installing a GENIbus module it is possible to connect a CU 351 to an external network. The connection can be established via a GENIbus-based network or a network based on another protocol via a gateway. See fig. 73. Contact Grundfos for further information. The gateway may be a Grundfos G100 gateway or a third-party gateway. Further information on the G100 gateway, see the data booklet G100 (publication no. V7139522). 36

18. Maintenance 18.1 CU 351 Warning Never make any work on pumps, terminal boxes or breaker cabinet until you have ensured that the electricity supply has been switched for at least five minutes and that it cannot be accidentally switched on. The CU 351 is maintenance-free. It must be kept clean and dry. Protect it against direct sunlight. The temperature of the CU 351 must not exceed the limits of ambient temperature. See section 20. Technical data. 19. Taking the CR Monitor out of operation Take the CR Monitor out of operation by switching off the main switch. Warning The conductors to the main switch are still live. Lock the main switch to ensure that the electricity supply cannot be accidentally switched on. Take CRE pumps out of operation by switching off the electricity supply to the motor-protective circuit breaker, automatic circuit breaker or fuse. 20. Technical data 20.1 Ambient temperature During operation: 0 C to +40 C. During transportation and standstill: 20 C to +60 C. The CR Monitor must not be exposed to direct sunlight. 21. Electrical data Supply voltage 3 x 400 VAC + 6/ 10 %, 50 Hz, PE. Internal power consumption Max. 50 W. Digital inputs Open circuit voltage: Closed circuit current: Frequency range: Analog inputs 24 VDC 5 ma, DC 0-4 Hz All digital inputs are supplied with PELV voltage (Protective Extra-Low Voltage). 0-20 ma Input current and voltage: 4-20 ma 0-10 V Repetitive accuracy: ± 0.5 % of full scale Input resistance, current: < 250 Ω Input resistance, voltage: > 50 kω ± 10 % Supply to sensor: 24 V, maximum 50 ma, short-circuit protected All analog inputs are supplied with PELV voltage (Protective Extra-Low Voltage). Digital outputs (relay outputs) Max. contact load: 250 VAC, 2 A. Min. contact load: 5 VDC, 10 ma. Input for PTC sensor/thermal switch For PTC sensor according to DIN 44082. A thermal switch can also be connected. 20.2 Air humidity Max. relative air humidity: 95 %. 20.3 Enclosure class IP54. 20.4 Supported pumps All CR, CRI, CRN pumps with motors mentioned in section 20.5 Supported motors, including CRN MAGdrive. 20.5 Supported motors All 3-phase Grundfos MG EFF1, 50 Hz motors. Siemens motors: 30 to 75 kw. CUE with the motors above. 3-phase Grundfos MGE EFF1 motors up to 22 kw. 20.6 Liquid temperature Pumps with LiqTec: 20 C to +120 C. * The temperature range for pumps without LiqTec depends on sensor and pump. Max. to +180 C. * Pumps with LiqTec and air-cooled top: Up to +180 C. 20.7 Cable lengths Sensors: Max. 200 m. LiqTec: 5 m (15 m on request). GENIbus communication: Max. 500 m. 37

22. Fault finding Warning Never make any work on pumps, terminal boxes or breaker cabinet until you have ensured that the electricity supply has been switched for at least five minutes and that it cannot be accidentally switched on. In the menus under Alarm (2), all faults, warnings and alarms detected by the CR Monitor will be shown with cause and fault code. The table below shows some of the typical faults which may occur in the CR Monitor. For a detailed explanation of cause and remedy, see the service instructions which can be downloaded from WebCAPS (www.grundfos.com > International website > WebCAPS). Fault code Fault indication warning alarm Cause/explanation Remedy 17 Steady state not achievable Measured data are not stable enough for the monitoring functions. The fault may be due to: High dynamics: Valves open and close to quickly. Check valves. Too high control rate. Reduce the control rate. Air in the system. Check the suction side for leakages. Vent the pump. Poor inlet (the pump does not suck well). Check if the inlet is clogged or inappropriately designed. 190 191 A set and activated alarm or warning limit has been exceeded. 196 197 198 23. Disposal Limit exceeded / Reduced efficiency Reduced pressure Increased power consumption This product or parts of it must be disposed of in an environmentally sound way: 1. Use the public or private waste collection service. 2. If this is not possible, contact the nearest Grundfos company or service workshop. The fault indication shows the alarm limit in question. Adjust the system so that the fault cause disappears. The pump efficiency or pressure has fallen compared to the operating characteristic learned, or the pump power consumption has increased. The fault may be due to: Clogging Check the pump and pipework, and remove the clogging. Leakage Find and remedy the leakage. Wear Dismantle the pump, and check the components for wear. Replace defective parts. See the service instructions of the pump. Another liquid is pumped than during learning. Go to display Learning (4.1.1), and carry out a new learning. The bearings have been relubricated. After relubrication, the motor may consume more power until the grease has been distributed in the bearing. 199 Outside the range learned The fault should disappear after maximum 30 minutes of operation when the grease has been distributed in the bearing. If the fault does not disappear, check the bearings. It is important to replace worn bearings with bearings of the same type. If the duty point has been changed on purpose, carry out learning in the new duty point. The fault may be due to: The duty point has been changed on purpose and Go to display Learning (4.1.1), and carry out learning in the new duty point. is now outside the range learned. Hydraulic losses (clogging, leakage, wear). Remove clogging, remedy leakage and replace worn pump parts, if any. Seasonal fluctuations (e.g. water level) Go to display Learning (4.1.1), and carry out learning in the new duty point. 208 Cavitation / The fault may be due to: The pump is cavitating. The cavitation curve of the system depends on the flow rate, liquid temperature, inlet pressure and the pump speed. Adjust one or more of the above parameters to prevent the fault from occurring again. Incorrect safety margin. Set the correct safety margin in display Cavitation (4.1.2). Vapour pressure (other liquid than water). The CR Monitor does not support the pumped liquid. / 38 Subject to alterations.

Argentina Bombas GRUNDFOS de Argentina S.A. Ruta Panamericana km. 37.500 Lote 34A 1619 - Garin Pcia. de Buenos Aires Phone: +54-3327 414 444 Telefax: +54-3327 411 111 Australia GRUNDFOS Pumps Pty. Ltd. P.O. Box 2040 Regency Park South Australia 5942 Phone: +61-8-8461-4611 Telefax: +61-8-8340 0155 Austria GRUNDFOS Pumpen Vertrieb Ges.m.b.H. Grundfosstraße 2 A-5082 Grödig/Salzburg Tel.: +43-6246-883-0 Telefax: +43-6246-883-30 Belgium N.V. GRUNDFOS Bellux S.A. Boomsesteenweg 81-83 B-2630 Aartselaar Tél.: +32-3-870 7300 Télécopie: +32-3-870 7301 Belorussia Представительство ГРУНДФОС в Минске 220090 Минск ул.олешева 14 Телефон: (8632) 62-40-49 Факс: (8632) 62-40-49 Bosnia/Herzegovina GRUNDFOS Sarajevo Paromlinska br. 16, BiH-71000 Sarajevo Phone: +387 33 713290 Telefax: +387 33 231795 Brazil Mark GRUNDFOS Ltda. Av. Humberto de Alencar Castelo Branco, 630 CEP 09850-300 São Bernardo do Campo - SP Phone: +55-11 4393 5533 Telefax: +55-11 4343 5015 Bulgaria GRUNDFOS Pumpen Vertrieb Representative Office - Bulgaria Bulgaria, 1421 Sofia Lozenetz District 105-107 Arsenalski blvd. Phone: +359 2963 3820, 2963 5653 Telefax: +359 2963 1305 Canada GRUNDFOS Canada Inc. 2941 Brighton Road Oakville, Ontario L6H 6C9 Phone: +1-905 829 9533 Telefax: +1-905 829 9512 China GRUNDFOS Pumps (Shanghai) Co. Ltd. 51 Floor, Raffles City No. 268 Xi Zang Road. (M) Shanghai 200001 PRC Phone: +86-021-612 252 22 Telefax: +86-021-612 253 33 Croatia GRUNDFOS predstavništvo Zagreb Cebini 37, Buzin HR-10010 Zagreb Phone: +385 1 6595 400 Telefax: +385 1 6595 499 Czech Republic GRUNDFOS s.r.o. Čajkovského 21 779 00 Olomouc Phone: +420-585-716 111 Telefax: +420-585-716 299 Denmark GRUNDFOS DK A/S Martin Bachs Vej 3 DK-8850 Bjerringbro Tlf.: +45-87 50 50 50 Telefax: +45-87 50 51 51 E-mail: info_gdk@grundfos.com www.grundfos.com/dk Estonia GRUNDFOS Pumps Eesti OÜ Peterburi tee 92G 11415 Tallinn Tel: + 372 606 1690 Fax: + 372 606 1691 Finland OY GRUNDFOS Pumput AB Mestarintie 11 FIN-01730 Vantaa Phone: +358-3066 5650 Telefax: +358-3066 56550 France Pompes GRUNDFOS Distribution S.A. Parc d Activités de Chesnes 57, rue de Malacombe F-38290 St. Quentin Fallavier (Lyon) Tél.: +33-4 74 82 15 15 Télécopie: +33-4 74 94 10 51 Germany GRUNDFOS GMBH Schlüterstr. 33 40699 Erkrath Tel.: +49-(0) 211 929 69-0 Telefax: +49-(0) 211 929 69-3799 e-mail: infoservice@grundfos.de Service in Deutschland: e-mail: kundendienst@grundfos.de Greece GRUNDFOS Hellas A.E.B.E. 20th km. Athinon-Markopoulou Av. P.O. Box 71 GR-19002 Peania Phone: +0030-210-66 83 400 Telefax: +0030-210-66 46 273 Hong Kong GRUNDFOS Pumps (Hong Kong) Ltd. Unit 1, Ground floor Siu Wai Industrial Centre 29-33 Wing Hong Street & 68 King Lam Street, Cheung Sha Wan Kowloon Phone: +852-27861706 / 27861741 Telefax: +852-27858664 Hungary GRUNDFOS Hungária Kft. Park u. 8 H-2045 Törökbálint, Phone: +36-23 511 110 Telefax: +36-23 511 111 India GRUNDFOS Pumps India Private Limited 118 Old Mahabalipuram Road Thoraipakkam Chennai 600 096 Phone: +91-44 2496 6800 Indonesia PT GRUNDFOS Pompa Jl. Rawa Sumur III, Blok III / CC-1 Kawasan Industri, Pulogadung Jakarta 13930 Phone: +62-21-460 6909 Telefax: +62-21-460 6910 / 460 6901 Ireland GRUNDFOS (Ireland) Ltd. Unit A, Merrywell Business Park Ballymount Road Lower Dublin 12 Phone: +353-1-4089 800 Telefax: +353-1-4089 830 Italy GRUNDFOS Pompe Italia S.r.l. Via Gran Sasso 4 I-20060 Truccazzano (Milano) Tel.: +39-02-95838112 Telefax: +39-02-95309290 / 95838461 Japan GRUNDFOS Pumps K.K. Gotanda Metalion Bldg., 5F, 5-21-15, Higashi-gotanda Shiagawa-ku, Tokyo 141-0022 Japan Phone: +81 35 448 1391 Telefax: +81 35 448 9619 Korea GRUNDFOS Pumps Korea Ltd. 6th Floor, Aju Building 679-5 Yeoksam-dong, Kangnam-ku, 135-916 Seoul, Korea Phone: +82-2-5317 600 Telefax: +82-2-5633 725 Latvia SIA GRUNDFOS Pumps Latvia Deglava biznesa centrs Augusta Deglava ielā 60, LV-1035, Rīga, Tālr.: + 371 714 9640, 7 149 641 Fakss: + 371 914 9646 Lithuania GRUNDFOS Pumps UAB Smolensko g. 6 LT-03201 Vilnius Tel: + 370 52 395 430 Fax: + 370 52 395 431 Malaysia GRUNDFOS Pumps Sdn. Bhd. 7 Jalan Peguam U1/25 Glenmarie Industrial Park 40150 Shah Alam Selangor Phone: +60-3-5569 2922 Telefax: +60-3-5569 2866 México Bombas GRUNDFOS de México S.A. de C.V. Boulevard TLC No. 15 Parque Industrial Stiva Aeropuerto Apodaca, N.L. 66600 Phone: +52-81-8144 4000 Telefax: +52-81-8144 4010 Netherlands GRUNDFOS Netherlands Veluwezoom 35 1326 AE Almere Postbus 22015 1302 CA ALMERE Tel.: +31-88-478 6336 Telefax: +31-88-478 6332 e-mail: info_gnl@grundfos.com New Zealand GRUNDFOS Pumps NZ Ltd. 17 Beatrice Tinsley Crescent North Harbour Industrial Estate Albany, Auckland Phone: +64-9-415 3240 Telefax: +64-9-415 3250 Norway GRUNDFOS Pumper A/S Strømsveien 344 Postboks 235, Leirdal N-1011 Oslo Tlf.: +47-22 90 47 00 Telefax: +47-22 32 21 50 Poland GRUNDFOS Pompy Sp. z o.o. ul. Klonowa 23 Baranowo k. Poznania PL-62-081 Przeźmierowo Tel: (+48-61) 650 13 00 Fax: (+48-61) 650 13 50 Portugal Bombas GRUNDFOS Portugal, S.A. Rua Calvet de Magalhães, 241 Apartado 1079 P-2770-153 Paço de Arcos Tel.: +351-21-440 76 00 Telefax: +351-21-440 76 90 România GRUNDFOS Pompe România SRL Bd. Biruintei, nr 103 Pantelimon county Ilfov Phone: +40 21 200 4100 Telefax: +40 21 200 4101 E-mail: romania@grundfos.ro Russia ООО Грундфос Россия, 109544 Москва, ул. Школьная 39 Тел. (+7) 495 737 30 00, 564 88 00 Факс (+7) 495 737 75 36, 564 88 11 E-mail grundfos.moscow@grundfos.com Serbia GRUNDFOS Predstavništvo Beograd Dr. Milutina Ivkovića 2a/29 YU-11000 Beograd Phone: +381 11 26 47 877 / 11 26 47 496 Telefax: +381 11 26 48 340 Singapore GRUNDFOS (Singapore) Pte. Ltd. 24 Tuas West Road Jurong Town Singapore 638381 Phone: +65-6865 1222 Telefax: +65-6861 8402 Slovenia GRUNDFOS PUMPEN VERTRIEB Ges.m.b.H., Podružnica Ljubljana Blatnica 1, SI-1236 Trzin Phone: +386 01 568 0610 Telefax: +386 01 568 0619 E-mail: slovenia@grundfos.si Spain Bombas GRUNDFOS España S.A. Camino de la Fuentecilla, s/n E-28110 Algete (Madrid) Tel.: +34-91-848 8800 Telefax: +34-91-628 0465 Sweden GRUNDFOS AB Box 333 (Lunnagårdsgatan 6) 431 24 Mölndal Tel.: +46(0)771-32 23 00 Telefax: +46(0)31-331 94 60 Switzerland GRUNDFOS Pumpen AG Bruggacherstrasse 10 CH-8117 Fällanden/ZH Tel.: +41-1-806 8111 Telefax: +41-1-806 8115 Taiwan GRUNDFOS Pumps (Taiwan) Ltd. 7 Floor, 219 Min-Chuan Road Taichung, Taiwan, R.O.C. Phone: +886-4-2305 0868 Telefax: +886-4-2305 0878 Thailand GRUNDFOS (Thailand) Ltd. 92 Chaloem Phrakiat Rama 9 Road, Dokmai, Pravej, Bangkok 10250 Phone: +66-2-725 8999 Telefax: +66-2-725 8998 Turkey GRUNDFOS POMPA San. ve Tic. Ltd. Sti. Gebze Organize Sanayi Bölgesi Ihsan dede Caddesi, 2. yol 200. Sokak No. 204 41490 Gebze/ Kocaeli Phone: +90-262-679 7979 Telefax: +90-262-679 7905 E-mail: satis@grundfos.com Ukraine ТОВ ГРУНДФОС УКРАЇНА 01010 Київ, Вул. Московська 8б, Тел.:(+38 044) 390 40 50 Фах.: (+38 044) 390 40 59 E-mail: ukraine@grundfos.com United Arab Emirates GRUNDFOS Gulf Distribution P.O. Box 16768 Jebel Ali Free Zone Dubai Phone: +971-4- 8815 166 Telefax: +971-4-8815 136 United Kingdom GRUNDFOS Pumps Ltd. Grovebury Road Leighton Buzzard/Beds. LU7 8TL Phone: +44-1525-850000 Telefax: +44-1525-850011 U.S.A. GRUNDFOS Pumps Corporation 17100 West 118th Terrace Olathe, Kansas 66061 Phone: +1-913-227-3400 Telefax: +1-913-227-3500 Usbekistan Представительство ГРУНДФОС в Ташкенте 700000 Ташкент ул.усмана Носира 1-й тупик 5 Телефон: (3712) 55-68-15 Факс: (3712) 53-36-35 Addresses revised 22.10.2008

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