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H. Construction <br />1. The VFD enclosure housing controller, modules, and components shall be NEMA Type <br />12, painted steel. The enclosure shall be free-standing, 72 inch minimum height, suitable <br />for mounting against a wall, and constructed with all modules, components, and load, line <br />and control terminations fully front accessible on an interior dead -front door panel. The <br />enclosure shall have provision for top or bottom entry of wiring and conduits, as required, <br />with adequate space for wire entry and bending in accordance with the NEC. The <br />controller enclosure shall have gasketed doors mounted on semiconcealed hinges, with <br />three point lockable door latches. Enclosures shall have panel -mounted ventilation units <br />with washable filters sized to properly cool the VFD within an ambient temperature of 90 <br />degrees, F. Ventilation units shall be powered by the drive's control power transformer <br />which shall be oversized for this purpose. <br />a. Mount the following devices on the front of the VFD deadfront panel: <br />1. Hand/Off/Automatic motor run selector switch. <br />2. Manual Speed potentiometer or equivalent. <br />3. Digital indicator calibrated in percent of maximum output speed (frequency). <br />4. Master Reset pushbutton. <br />5. Power On indicating light. <br />6. Cabinet door handle with mechanical interlock to disconnect switch or <br />incoming line circuit breaker. <br />7. Controller Fault indicating light. <br />8. Controller Keypad. <br />9. Motor Run indicating light. <br />10. Motor Overload indicating light. <br />11. Other Fault indicating lights, when required. <br />12. Overload Reset pushbutton. <br />13. Elapsed run-time meter. <br />14. Emergency Stop pushbutton. <br />Note: Items 2 & 3 may be integral to the keypad. <br />044572017 <br />16483-8 <br />