IOMM Starter 7
Safety Precautions
Electrical codes require that all equipment (starter, motor, operator station, etc.) be properly
grounded. An incoming disconnect must be locked open before wiring or servicing the starter,
motor, or other related equipment. The equipment must only be serviced by qualified
personnel fully familiar with the equipment.
The opening of the branch circuit protective device may be an indication that a fault current
has been interrupted. To reduce the risk of electrical shock, current carrying parts and other
components of the starter should be inspected and replaced if damaged.
Equipment is at line voltage when AC power is connected. Pressing the Stop push-button on
the chiller control panel does not remove AC mains potential. All phases must be
disconnected before it is safe to work on machinery or touch motor terminals and control
equipment parts.
Power Factor Capacitors, Surge Capacitors and Lightning Arrestors
These devices MUST NOT be used with solid state starters. The SCR’s in the starter will be
damaged by the di/dt levels created.
On wye-delta starters, they are connected between the starter and the motor.
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