Before starting installation, get familiarized with all safety guidelines and precautions in this guide. Additional resources - including
the VLT® Safe Torque Off Operating Guide for VLT® AutomationDrive EZ FC 321, the Programming Guide, and the Application Guide
- can be downloaded at www.danfoss.com/service-and-support.
1.2 Tools Needed
The following tools are required for installing the VLT® AutomationDrive EZ FC 321.
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Lifting aids to place the unit into position.
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Drill with 10 mm and 12 mm drill bits.
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Tape measurer.
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Torx, Phillips, and slotted screwdrivers (T15, T20, T25, T30, T50, PZ1, SL1, and SL2).
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Wrench with extensions and 7–17 mm sockets.
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Wire crimper.
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Sheet metal punch and/or pliers for cable entry plate.
1.3 Items Supplied
Items supplied vary according to product configuration.
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Make sure that the items supplied and the information on the nameplate correspond to the order confirmation.
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Check the packaging and the drive visually for damage caused by inappropriate handling during shipment. File any claim for
damages with the carrier. Retain damaged parts for clarification.
NOTE! Download the English and French product guides with applicable safety, warning and caution information from https://
www.danfoss.com/en/service-and-support/.
REMARQUE Vous pouvez télécharger les versions anglaise et française des guides produit contenant l'ensemble des informations
de sécurité, avertissements et mises en garde applicables sur le site https://www.danfoss.com/en/service-and-support/.
VLT®AutomationDrive EZ FC 321
Installation Guide
Safety Instructions
2 Safety Instructions
2.1 Overview
This Safety chapter only relates to installing the drive. When programming or operating the drive, refer to the Application Guide or
Programming Guide for applicable safety instructions. To install this product safely:
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Check that the content of the delivery is correct and complete.
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Never install or start up damaged units. File a complaint immediately to the shipping company, if you receive a damaged unit.
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Follow the instructions provided in this installation guide.
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Make sure that all personnel working on or with the drive have read and understood this guide and any additional product
manuals. Contact Danfoss if you are unclear of the given information, or if you are missing information.
2.2 Target Group and Necessary Qualifications
Correct and reliable transport, storage, installation, operation, and maintenance are required for the trouble-free and safe operation
of the drive. Only skilled personnel are allowed to perform all related activities for these tasks. Skilled personnel are defined as
properly trained staff, who are familiar with and authorized to install, commission, and maintain equipment, systems, and circuits in
accordance with pertinent laws and regulations. Also, the skilled personnel must be familiar with the instructions and safety measures described in this manual and the other product-specific manuals. If you are not a skilled electrician, do not perform any electrical installation, and troubleshooting activities.
2.3 Safety Symbols
The following symbols are used in this manual:
D A N G E R
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
W A R N I N G
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
C A U T I O N
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
N O T I C E
Indicates information considered important, but not hazard-related (for example, messages relating to property damage).
2.4 General Safety Precautions
For US and Canadian markets:
W A R N I N G
LACK OF SAFETY AWARENESS
This document gives important information on how to prevent injury and damage to the equipment or the system. Ignoring
them can lead to death, serious injury, or severe damage to the equipment.
Make sure to fully understand the dangers and safety measures incurred in the application.
Installing the drive in a potentially explosive atmosphere can lead to death, personal injury, or property damage.
Install the unit in a cabinet outside of the potentially explosive area.
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Use a motor with an appropriate ATEX protection class.
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Install a PTC temperature sensor to an ATEX PTC-Thermistor device to monitor the motor temperature.
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Install short motor cables.
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Use sine-wave output filters when shielded motor cables are not used.
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2.7 Electrical Installation Precautions
Before you do electrical work on the drive, lock out and tag out all power sources to the drive.
W A R N I N G
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge equipment capacitors, even with the equipment turned
off and locked out/tagged out. Failure to run output motor cables separately or to use shielded cables could result in death or
serious injury.
Run output motor cables separately or use shielded cables.
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Simultaneously lock out/tag out all the drives.
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Protective earth connection and RCD requirements
A properly dimensioned protective earth (PE) setup is essential for the safety of the drive system protecting the user against electrical shock. The PE connections of the drive installation ensure that the drive system remains safe preventing that the single fault
currents will generate any hazardous voltages on accessible conductive part, for example, conductive enclosure parts.
The VLT® AutomationDrive EZ FC 321 shall be installed according to the requirement for PE connection and supplementary protective bonding as specified in IEC/EN 60364-5-54 cl. 543 and 544.
For the automatic disconnection, if there is a fault at the motor side, it shall also be ensured that the impedance of the PE connection between drive and motor is sufficiently low to ensure compliance with IEC/EN 60364-4-41 cl. 411 or 415. The impedance is
verified by initial and periodic test according to IEC 60364-4-41.
In some regions, extra local requirements apply and must be adhered to.
The suitability for connection of PE and protective bonding of accessible conductive parts according to IEN/EN 60364-5-54 to the
drive is ensured by following the design according to IEC/EN 61800-5-1.
Where the FC 321 is used as a component inside specific applications, special requirement for proper connection to the PE may
apply, for example, IEC/EN 60204 and IEC/EN 61349-1.
Protection against motor overload is not included in the default setting. The ETR function provides class 20 motor overload pro-
tection. Failure to set the ETR function means that motor overload protection is not provided and property damage can occur if
the motor overheats.
Enable the ETR function. See the application guide for more information.
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2.8 Safe Operation
When operating the unit, refer to the Programming Guide and Application Guide for guidance and all applicable safety instructions.
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The drive is not suitable as the only safety device in the system. Make sure that additional monitoring and protection devices on
drives, motors, and accessories are installed according to the regional safety guidelines and accident prevention regulations.
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Keep all doors, covers, and terminal boxes closed and securely fastened during operation.