Guide Specs

SERIES 03 BACKWARD CURVED CENTRIFUGAL FAN, SINGLE WIDTH SK-880-03 NOVEMBER, 1997

The belt drive Backward Curved Centrifugal Fan, Single Width shall be manufactured by Hartzell Fan, Inc.®, Series 03, ARRG. 1, 9, 9M, or 10, Class I, II, or III. Wheels available are the backward curved (BC, 12" - 60") or the airfoil (BA, 18" - 60"). Rotation as determined by the drive side of the fan, shall be clockwise or counter-clockwise. Fan housing, for sizes 12" through 33", shall be field rotatable and the discharge shall be any of the eight AMCA standard positions. Sizes 36" through 60" shall be a fixed construction for the rotation and discharge specified. The fan shall be packaged, completely assembled and ready to install, except for ARRG. 1, which is less motor and drive.

The fan housing and base shall be a heavy gauge commercial quality carbon steel suitable for temperatures up to 300° F. and with modifications up to 800° F. (ARRG. 10 limited 250° F. to 600° F.). The housing and wheels shall be continuously welded in compliance with AWS D1.1 standard. The wheels shall be commercial quality carbon steel with single thickness airfoil blades or double thickness hollow airfoil blades and have non-overloading horsepower characteristics. The wheel shall be mounted to the fan shaft with a split taper bushing. The shafts shall be ground and polished. The fan bearings shall be heavy duty, self-aligning ball or roller type (depending on fan size, motor HP, and performance) relubricatable for continuous service. They shall have a minimum L10 life of 50,000 hours. The belts shall be an oil, heat, and static-resistant type, oversized for continuous duty. Lifting lugs are a standard feature, for ease of handling and installation.

The fan assembly shall be dynamically balanced at the Hartzell factory prior to shipping. Fans shall be balanced in accordance with AMCA Standard 204-96, fan application category BV-3 (comparable to Grade G6.3). Fans shall be manufactured in accordance with Hartzell's standard quality assurance procedures. The fan performance shall be based on tests conducted in Hartzell's AMCA accredited laboratory and conducted in accordance with the latest revision of AMCA Standard 210 for air performance and AMCA Standard 300 for sound. Fans shall be licensed to bear the AMCA Certified Sound and Air Performance Rating Seal for the BC wheel only.