York Medium Voltage Variable Speed Drive MVVSD09002K-84

Ensure all switches and circuit breakers are opened

Disconnect devices not intended for dielectric test, such as input surge suppressors

Perform dielectric test at 2.25 times the nominal system voltage plus 2,000 V phase-to-ground and phase-to-phase

Calibrate light or buzzer to indicate failure with output current between 1.5 mA and 2.0 mA for every 1,000 V applied

Was the dielectric test performed by qualified personnel?

Refer to safety instructions provided with the test equipment

Use a forklift of adequate capacity to move the sections.

Lift the enclosure from the slots provided in the channel base on the transformer section.

Ensure the inverter section is shipped with 4 x 4 posts attached to the bottom.

Adjust rigging lengths to maintain the enclosure in an upright position.

Ensure the angle between the lifting cables and vertical does not exceed 45°.

Ensure ropes or cables do not pass through the holes in lifting angles or eyebolts.

Use slings with safety hooks or shackles of adequate load rating.

Describe any necessary repairs or replacements

Ensure all safety signs are visible and not obscured

Manually exercise all switches, relays, and other operating mechanisms

Check operating mechanisms for intended function

Are fan overload relays selected and adjusted to correct settings?

Is the drive the correct voltage and current rating for the motor being started?

Safety and Environmental Checks

Ensure all installation safety precautions are followed

Is the installation site meeting all environmental specifications for NEMA 1?

Is the correct power source available?

Is the chiller in the correct working condition and ready to be started?

Verify MVVSD ratings match system data

Remove all blocks or temporary braces used for shipment

Clean out all metal chips, scrap wire, and other debris

Is there an appreciable accumulation of dust or dirt?

Clean the enclosure using a brush, vacuum cleaner, or a clean lint-free brush

Check the integrity of all bus bar supports for secureness and damage