The Class 8839 Econo-flex™ Type 3R drive is a packaged, outdoor-rated, adjustable-speed drive for commercial and industrial hvac and pump applications. It includes a thermal management system that allows equipment to operate in -10 to 50 degrees C ambient temperatures. The drive has a coordinated circuit breaker for short-circuit protection, and the motor isolation and bypass contactors have a mechanical and electrical interlock to prevent accidental backfeeding. The drive is preprogrammed for variable-torque operation and prewired with hvac controls and interface connection. Other features include industrial-rated control operators, pilot devices, and bottom conduit entries that are prepunched with conduit entry locations.

Square D/Schneider Electric, 1415 S. Roselle Rd., Palatine, IL 60067-7399; 847-397-2600; 847-925-7271 (fax); (e-mail); (website).

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