Grundfos CU331SP Installation And Operating Instructions Manual Download Page 23

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Grundfos c

ies

USA

GRUNDFOS Pumps Corporation
17100 West 118th Terrace
Olathe, Kansas 66061
Phone: +1-913-227-3400
Telefax: +1-913-227-3500

Canada

GRUNDFOS Canada Inc.
2941 Brighton Road
Oakville, Ontario
L6H 6C9
Phone: +1-905 829 9533
Telefax: +1-905 829 9512

México

Bombas GRUNDFOS de México S.A. de C.V.
Boulevard TLC No. 15
Parque Industrial Stiva
Aeropuerto
Apodaca, N.L.C.P. 66600
Phone: +52-81-8144 4000
Telefax: +52-81-8144 4010

Summary of Contents for CU331SP

Page 1: ...GRUNDFOS INSTRUCTIONS CU331SP 2 3 5 Hp Installation and operating instructions ...

Page 2: ...w the exclusion or limitation of incidental or consequential damages and some jurisdictions do not allow limit actions on how long implied warranties may last Therefore the above limitations or exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from jurisdiction to jurisdiction 2 Symbols used in this document 1 Limited warran...

Page 3: ...er certain conditions The CU331SP will reduce its performance under these conditions low air pressure at high altitude long motor cables The required measures are described in the next two sections 4 4 1 Reduction at low air pressure PELV Protective Extra Low Voltage At low air pressure the cooling capacity of air is reduced and the CU331SP automatically reduces the performance to prevent overload...

Page 4: ...ons and weight 2 Fit the screws but leave loose Mount the CU331SP and tighten the four screws Fig 4 Drilling of holes 7 Electrical connection 7 1 Electrical protection 7 1 1 Protection against electric shock indirect contact Protective conductors must always have a yellow green PE or yellow green blue PEN color marking Instructions according to EN IEC 61800 5 1 The CU331SP must be stationary insta...

Page 5: ...h A mains switch can be installed before the CU331SP according to local regulations See fig 5 7 2 2 Wiring diagram The wires in the terminal box must be as short as possible Excepted from this is the protective conductor which must be so long that it is the last one to be disconnected in case the cable is inadvertently pulled out of the cable entry Fig 5 CU331SP wiring diagram Mains connection 1 C...

Page 6: ...etting the signal type of the analog input The factory setting of the inputs is voltage signal U This setting must be changed to I prior to starting the CU331SP Be sure the power supply is switched off Remove the control panel to set the contact See fig 11 Fig 11 Setting contact A54 to current signal I Note Note The cable screen must be exposed and in physical contact with the mounting plate and c...

Page 7: ...r signal relays normal state not activated 7 4 1 Signal Relay The signal relays on the CU331SP are predefined as follows Relay 1 Pump running Relay 2 Alarm Fig 16 Terminals for relay connection Terminal Type Function 12 24 V out Supply to sensor 18 DI 1 Digital input start stop 20 GND Common frame for digital inputs 55 GND Common frame for analog inputs 54 AI 2 Sensor input sensor 1 0 4 20 mA 61 R...

Page 8: ...eet the EMC requirements the CU331SP comes with the following types of built in radio frequency interference filter RFI Single phase input three phase output Description of RFI filter types RFI filter types are according to EN61800 3 Fig 17 Example of stripped cable with screen Fig 18 Do not twist the screen ends 8 Operating modes The following operating modes are set on the control panel in menu ...

Page 9: ...OPERATION 2 STATUS 3 INSTALLATION 0 1 1 1 2 1 3 1 1 11 0 2 1 2 2 2 3 2 2 11 1 3 2 3 3 3 1 4 2 4 3 4 3 11 7 11 Automatic or manual setting of the direction of rotation 8 11 1 5 1 9 2 5 3 5 2 6 9 11 10 11 Automatic setting of Stop and Dry run functions 11 11 1 10 1 14 2 7 2 11 2 12 ...

Page 10: ... 21 Example of display in the start up guide Fig 22 Example of display in the user menu 11 2 Back to factory setting Follow this procedure to get back to the factory setting 1 Switch off the power supply to the CU331SP 2 Press On Off OK and while switching on the power supply The CU331SP will reset all parameters to factory settings The display will turn on when the reset is completed Warning The ...

Page 11: ...etting of the direction of rotation The CU331SP automatically tests and sets the correct direction of rotation without changing the cable connections This test is not suitable for certain pump types and will in certain cases not be able to determine for certainty the correct direction of rotation In these cases the CU331SP changes over to manual setting where the direction of rotation is determine...

Page 12: ...e operating mode Normal Then display 1 1 of menu OPERATION will appear 11 3 9 Manual setting when the direction of rotation is not visible It must be possible to observe the pressure Information displays Press OK to continue The pump starts after 10 seconds It is possible to interrupt the test and return to the previous display The pressure will be shown during the test if a pressure sensor is con...

Page 13: ...rm or warning An alarm will activate an alarm indication in CU331SP and cause the pump to change operating mode typically to stop However for some faults resulting in alarm the pump is set to continue operating even if there is an alarm A warning will activate a warning indication in CU331SP but the pump will not change operating or control mode Alarm 1 3 In case of an alarm the cause will appear ...

Page 14: ...l Stop Min or Max Furthermore it shows where this operating mode was selected CU331SP menu Bus External or On Off button 11 6 3 Actual value 2 3 This display shows the actual value controlled 11 6 4 Measured value sensor 1 2 4 This display shows the actual value measured by sensor 1 connected to terminal 54 If no sensor is connected to the CU331SP will appear in the display 11 6 5 Speed 2 5 Tolera...

Page 15: ...ection function The pump will check the flow regularly by reducing the speed for a short time If there is no or only a small change in pressure this means that there is low flow The speed will be increased until the stop pressure actual setpoint 0 5 x ΔH is reached and the pump will stop after a few seconds The pump will restart at the latest when the pressure has fallen to the start pressure actu...

Page 16: ...4 2 1 Warning The CU331SP will continue the operation as long as the warning is active The warning remains active until the cause no longer exists Some warnings may switch to alarm condition 14 2 2 Alarm In case of an alarm the CU331SP will stop the pump or change the operating mode depending on the alarm type and pump type See 14 1 Warning and alarm list Pump operation will be resumed when the ca...

Page 17: ...h 15 3 Surroundings 15 4 Terminal tightening torques Indicator light Function On green The pump is running or has been stopped by a stop function If flashing the pump has been stopped by the user CU331SP menu external start stop or bus Off orange The pump has been stopped with the On Off button Alarm red Indicates an alarm or a warning Type Function Relay 1 Pump running Relay 2 Alarm TM03 9002 280...

Page 18: ...ximum cable cross section to signal terminals rigid conductor AWG 14 Maximum cable cross section to signal terminals flexible conductor AWG 18 Minimum cable cross section to signal terminals AWG 20 Typical shaft power P2 Hp Maximum fuse size A Fuse type Maximum conductor cross section1 AWG mm2 2 40 gG 7 10 3 40 gG 7 10 5 80 gG 7 10 Typical shaft power P2 Hp Maximum fuse size A Bussmann RK1 Maximum...

Page 19: ...cy drive may be higher than that of a corresponding motor which is not controlled by a variable frequency drive 16 Disposal This product or parts of it must be disposed of in an environmentally sound way 1 Use the public or private waste collection service If this is not possible contact the nearest Grundfos company or service workshop Subject to alterations Terminal number 54 Current signal A54 I...

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Page 23: ...7 3400 Telefax 1 913 227 3500 Canada GRUNDFOS Canada Inc 2941 Brighton Road Oakville Ontario L6H 6C9 Phone 1 905 829 9533 Telefax 1 905 829 9512 México Bombas GRUNDFOS de México S A de C V Boulevard TLC No 15 Parque Industrial Stiva Aeropuerto Apodaca N L C P 66600 Phone 52 81 8144 4000 Telefax 52 81 8144 4010 ...

Page 24: ...29 0213 ECM 1110089 The name Grundfos the Grundfos logo and be think innovate are registered trademarks owned by Grundfos Holding A S or Grundfos A S Denmark All rights reserved worldwide Copyright Grundfos Holding A S www grundfos com ...

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