Electrical Installation; Safety Instructions; Emc-Compliant Installation - Danfoss VLT HVAC Drive FC 102 Operating Manual

VLT® HVAC Drive FC 102
Operating Guide

5 Electrical Installation

5.1 Safety Instructions

See the Safety Precautions section for general safety warnings.
EXCESSIVE HEAT AND PROPERTY DAMAGE
Overcurrent can generate excessive heat within the drive. Failure to provide overcurrent protection can result in risk of fire and
property damage.
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Additional protective equipment such as short-circuit protection or motor thermal protection between drive and motor is
required for applications with multiple motors.
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Input fusing is required to provide short circuit and overcurrent protection. If fuses are not factory-supplied, the installer
must provide them. See maximum fuse ratings in the Specifications chapter.
WIRE TYPE AND RATINGS
All wiring must comply with local and national regulations regarding cross-section and ambient temperature requirements. For
power connections, minimum 75 °C (167 °F) rated copper wire is recommended. Refer to the the Specifications chapter.
INDUCED VOLTAGE
Induced voltage from output motor cables from different drives that are run together can charge equipment capacitors even
with the equipment turned off and locked out. Failure to run output motor cables separately or use shielded cables could result
in death or serious injury.
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Run output motor cables separately or use shielded cables.
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Simultaneously lock out all the drives.
SHOCK HAZARD
The drive can cause a DC current in the PE conductor. Failure to use a Type B residual current-operated protective device (RCD)
may lead to the RCD not providing the intended protection and therefore may result in death or serious injury.
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When an RCD is used for protection against electrical shock, only a Type B device is allowed on the supply side.
PROPERTY DAMAGE
Protection against motor overload is not included in the default setting. For the North American market, the ETR function pro-
vides class 20 motor overload protection in accordance with NEC. Failure to set the ETR function means that motor overload pro-
tection is not provided and property damage can occur if the motor overheats.
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Enable the ETR function by setting parameter 1-90 Motor Thermal Protection to [ETR trip] or [ETR warning].

5.2 EMC-compliant Installation

To obtain an EMC-compliant installation, be sure to follow all electrical installation instructions.
Also, remember to practice the following:
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