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GREASE FAN CONSTRUCTION FEATURES GREASE EXHAUST CLASSIFICATION PDU-RG and PNU-RG exhausters are listed by Underwriters Laboratories (UL) for restaurant exhaust in their "Fire Protection Equipment Directory" under "Power Ventilators for Restaurant Exhaust Applications (YZHW)." To meet the requirements for this application, PDU-RG and PNU-RG exhausters passed two very demanding test: Normal Temperature Test required the fan to operate continuously while exhausting air at 300° F without any deteriorating effect to the fan which would cause unsafe operation. Abnormal Flare-Up Test required the fan to operate continuously while exhausting burning grease vapors at 600° F for approximately 15 minutes without any deteriorating effect to the fan which would cause unsafe operations. /— GREASE TROUGH KIT (OPTIONAL) Collects grease to avoid drainage onto roof surface. Easy clip on attachment; does not require tools for removal. CURB (OPTIONAL) Designed to meet NFPA* requirements. Constructed of heavy gauge galvanized steel with continuous weld seams. CURB HINGE KIT (OPTIONAL) Allows entire exhauster to swing away for access to wheel and ductwork for cleaning. *To comply with NFPA 96 the unit must be mounted on a curb of sufficient height to raise the discharge to 40" or more. PNU-SE CONSTRUCTION FEATURES EMERGENCY SMOKE CONTROL MOTOR Motors are heavy-duty type with pre-lubricated ball bearings requiring minimum maintenance. All motors are located out of the air stream and are cooled with ambient air. DRIVE ASSEMBLY Motor and drive assembly are located out of exhaust air stream. Drive assembly and motor support are constructed of a rugged galvanized steel frame. Belts are static free, heat and oil resistant. Cast iron drives are sized for 150% of drive horsepower. COMPARTMENT SHIELD Insulation restricts heat propagation into motor compartment. DISCONNECT SWITCH Factory disconnect mounted as standard. All wiring and electrical components comply with National Electrical Codes (NEC) and are either UL Listed or Recognized. BEARINGS Permanently lubricated bearings are used in duplex split pillow block housing. Bearings are resiliently mounted in neoprene rings, providing extra protection and vibration isolation. The bearing assembly is rated at an L50 life of 200,000 hours and features Acme's 5-year Limited Warranty. COMPARTMENT COVER Constructed of heavy gauge aluminum. Quick release latches allow easy removal of cover for access to motor compartment without tools. BREATHER TUBES Cooling fins located on top of the impeller draw outside air through the breather tubes directly into the motor compartment resulting in maximum motor life. VIBRATION ISOLATION Neoprene vibration isolators are installed to isolate motor and drive base from fan housing. WINDBAND Constructed of heavy gauge aluminum with rolled bead for extra strength. Orifice base and motor base constructed of galvanized steel Model PNU-SE is Listed for Electrical (UL/C-UL 705) File No. E39982 and is Listed for Power Ventilator for Smoke Control System File No. MH25680. UL Listed for: 500°F for 4 and 8 hours 630°F for 4 hours 1000°F for 15 and 25 minutes APPLICATIONS General Clean Air Exhaust Emergency Smoke Control PNU-SE exhausters are Listed by Underwriters Laboratories (UL) as Power Ventilators for Emergency Smoke Control Systems. STEEL IMPELLER Backward inclined, non-overloading centrifugal steel impeller. Operates with a minimum of air noise and maximum efficiency while exhausting high temperature air. Page 4