Guide Specs

SERIES 63G G-DUTY BELTED UPBLAST ROOF VENTILATOR, STEEL SK-880-63-G FEBRUARY, 2002

The Belted Upblast Roof Ventilator, Steel, shall be manufactured by Hartzell Fan, Inc., Series 63. Standard sizes are 18" through 48". The ventilator shall be packaged, completely assembled and ready to install.

The belt drive upblast roof ventilator propeller shall be an airfoil design, cast of 319 aluminum in compliance with Federal Specification QQ-A-601E and ASTM B26. Propellers shall be retained on the fan shaft utilizing a split taper bushing or a clamp block arrangement.

Tubular motor mounts shall provide support for the motor. Steel motor base shall be adjustable to accommodate a range of motor sizes. Motors shall be totally enclosed air over type. All fractional motors shall be permanently lubricated, non-regreasable. Integral horsepower motors shall be supplied with regreasable bearings. Removable windband for ease of maintenance of motor and drive assembly shall be standard.

The propeller shall be mounted in a high efficiency air seal fan orifice with the smaller diameter of the ring overlapping the propeller tips.

Standard construction shall include a painted galvannealed steel orifice panel. Bearings, drives, and drive shaft shall be mounted in close proximity to motor for ease of maintenance and extended belt life. Fixed pitch drives shall be standard.

The stack cap shall be rolled, welded construction of minimum 20 gauge painted galvannealed steel. Stack cap lids shall be constructed of galvanized steel. Butterfly lids shall open automatically when the unit is on, close weather-tight when the unit is off. Discharge airstream shall prevent entry of rain or snow during operation.

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