Table of Contents
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Table of Contents
Related Manuals for Grundfos CU331SP
Summary of Contents for Grundfos CU331SP
- Page 1 GRUNDFOS INSTRUCTIONS CU331SP 2, 3, 5 Hp Installation and operating instructions...
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Page 2: Table Of Contents
1. Limited warranty Introduction General description Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are warranted to the original user only to be free of Applications defects in material and workmanship for a period of 24 months Safety and warnings from date of installation, but not more than 30 months from date Warning of manufacture. -
Page 3: Introduction
PELV = Protective Extra Low Voltage. 3.2 Applications At low air pressure, the cooling capacity of air is reduced, and the The CU331SP was developed for use with Grundfos 2, 3, and 5 CU331SP automatically reduces the performance to prevent Hp 4" SP pumps. -
Page 4: Packaging Label
5.2 Packaging label Required free space above and below the CU331SP The CU331SP can also be identified by means of the label on the Enclosure Space [in (mm)] packaging. 7.9 (200) 6. Mechanical installation For information about enclosure, see 15.1 Enclosure. -
Page 5: Mains And Motor Connection
For single-phase connection, use L1 and L2. Caution The leakage current to ground exceeds 3.5 mA. Mains connection If the CU331SP is connected to an electrical installation where an Check that mains voltage and frequency earth leakage circuit breaker (ELCB) is used as additional Caution... -
Page 6: Connecting The Signal Terminals
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. -
Page 7: Connecting The Signal Relays
The RS-485 screen must be connected to frame. 7.3.4 Access to signal terminals All signal terminals are behind the terminal cover of the CU331SP Fig. 14 Fitting the conductor into the signal terminal front. Remove the terminal cover as shown in Fig.12. -
Page 8: Emc-Correct Installation
9. Control mode 7.6 RFI filters The control mode of the CU331SP is: To meet the EMC requirements, the CU331SP comes with the • Controlled operation (closed loop) with a sensor connected. following types of built-in radio frequency interference filter (RFI). -
Page 9: Menu Overview
10. Menu overview START-UP GUIDE 0. GENERAL 1. OPERATION 2. STATUS 3. INSTALLATION 1/11 2/11 3/11-7/11 Automatic or manual setting of the direction of rotation 8/11 1.5 - 1.9 9/11-10/11 Automatic setting of Stop and Dry-run functions 11/11 1.10-1.14 2.11 2.12 Fig. -
Page 10: Setting By Means Of The Control Panel
It is also possible to see the latest five warnings and alarms. Adjusting the display contrast 3. STATUS shows the status of the CU331SP and the pump. It is Press OK and + for darker display. not possible to change or set values. -
Page 11: Start-Up Guide
Ensure no personnel or equipment is in The start-up guide is started the first time when the CU331SP is danger! connected to the power supply. It can be restarted in menu The CU331SP automatically tests and sets the correct direction GENERAL. - Page 12 During the test, the pump will run for a short time. Ensure no personnel or equipment is in danger! The CU331SP automatically determines and sets the stop and dr- The pump starts after 10 seconds. run functions for the pump and motor combination It is possible to interrupt the test and return to the previous display.
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Page 13: Menu General
In case of warning, the cause will appear in the display. See section 14.1 Warning and alarm list. 11.5.4 Fault log For both fault types, alarm and warning, the CU331SP has a log function. This display is for service use only. Alarm log (1.5-1.9) 11.5 Menu OPERATION 11.5.1 Setpoint (1.1) -
Page 14: Menu Status
Warning log (1.10 - 1.14) 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) In case of a "warning", the last five warning indications will appear in the warning log. -
Page 15: Menu Installation
Sensor measuring range: 0-120 psi 11.7.2 Motor speed high limit (3.2) This display shows the protocol selection for the RS-485 port of the CU331SP. The protocol can be set to these values: • GENIbus • This parameter allows the user to limit the maximum speed that •... -
Page 16: Maintenance And Service
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. 14.1 Warning and alarm list. -
Page 17: Indicator Lights
14.2.3 Locked alarm In case of a locked alarm, the CU331SP will stop the pump and become locked. Pump operation cannot be resumed until the cause of the locked alarm has been remedied and the alarm has been reset. -
Page 18: Cable Length
Always comply with national and local regulations as to cable cross-sections. Do not use the power supply for switching the Note Note CU331SP on and off. 15.6.1 Cable cross-section to signal terminals 15.7.2 Motor output (U, V, W) Maximum cable cross-section to signal AWG 14... -
Page 19: Sound Pressure Level
(PELV) and other high-voltage terminals. 15.8 Sound pressure level The sound pressure of the CU331SP is maximum 70 dB(A). The sound pressure level of a motor controlled by a Variable frequency drive may be higher than that of a corresponding motor which is not controlled by a variable frequency drive. - Page 23 Canada México GRUNDFOS Canada Inc. Bombas GRUNDFOS de México S.A. de C.V. GRUNDFOS Pumps Corporation 2941 Brighton Road Boulevard TLC No. 15 17100 West 118th Terrace Oakville, Ontario Parque Industrial Stiva Olathe, Kansas 66061 L6H 6C9 Aeropuerto Phone: +1-913-227-3400 Phone: +1-905 829 9533 Apodaca, N.L.C.P.
- Page 24 L-CU-TL-012 98369129 0213 ECM: 1110089 www.grundfos.com www.grundfos.us...
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