Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 19)

Electrical Installation
Precautions
WARNING:
• EQUIPMENT HAZARD. Rotating shafts and electrical equipment can be hazardous. All
electrical work must conform to national and local electrical codes. Installation, start-
up, and maintenance must be performed by trained and qualified personnel. Failure
to follow these guidelines could result in death or serious injury.
• FIRE HAZARD. Consult the Brake Design Guide IM257 for details on proper
installation of a brake resistor.
NOTICE:
WIRING ISOLATION. Run input power, motor wiring and control wiring in three separate
metallic conduits or use separated shielded cable for high frequency noise isolation.
Failure to isolate power, motor and control wiring could result in less than optimum
frequency converter and associated equipment performance.
For your safety comply with the following requirements:
• Electronic control equipment is connected to hazardous mains voltage. Extreme care
should be taken to protect against electrical hazards when applying power to the unit.
• Run motor cable from multiple frequency converters separately. Induced voltage can
charge equipment capacitors even with the equipment turned off and locked.
Overload and equipment protection:
• An electronically activated function within the frequency converter provides overload
protection in the motor. The overload calculates the level of increase to activate
timing for the trip (controller output stop) function. The higher the current draw, the
quicker the trip response. The overload provides Class 20 motor protection. See
Warnings and alarms section for details on the trip function.
• All frequency converters must be provided with short-circuit and over-current
protection. Input fusing is required to provide this protection. If not factory supplied,
fuses must be provided by the installer as part of installations. See Fuse specifications
section for details.
Figure 3: Frequency converter fuses
Item Description
1 Fuses
2 Ground
Electrical Installation
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 17