Acme Engineering UBH-UF Installation Manual

TABLE OF CONTENTS
Page
Construction Features ---------------------------------------------------------3
High Temperature and Smoke Exhaust Application -------------------------------------4
Performance Data ------------------------------------------------------------5
Dimensional Data-------------------------------------------------------------6
Typical Specifications ----------------------------------------------------------6
Optional Accessories ----------------------------------------------------------7
Optional Coatings-------------------------------------------------------------7
Warranty Statement -----------------------------------------------------------8
MODEL UBH Tube Axial Belt Drive Upblast Roof Exhauster
The rugged design of the UBH is best suited for commercial roof exhaust applications where conditions require the motor, drives, and bearings to be out of the airstream. The high velocity upblast discharge of the UBH disperses air high above the building’s roof. The UBH mounts directly over the roof opening for efficient exhaust from ducts or open areas. Models are available in 9 sizes ranging from 16 to 60 inches with a CFM range of 1757 to 61,236 and static pressures up to
inch. UBH exhausters are capable to
handle temperatures up to 200°F.
Acme Engineering & Manufacturing Corp. certifies that Upblast Roof Exhauster Models UBH, UBH-UF and UBH-SE shown on page 5 are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311 and comply with the requirements of the AMCA Certified Ratings Program.
Most Acme JETMASTER™ fans bear the U.L. listing mark. Consult the Acme representative for availability.
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CONSTRUCTION FEATURES
WINDBAND
Windbands are made of heavy gauge steel with a flange at the top to provide extra strength and protection from driving crosswinds. A channel type cross tie member provides additional lateral rigidity for the windband and serves as an open position stop for butterfly dampers.
BUTTERFLY DAMPERS
Butterfly dampers automatically swing up to full open position to permit free passage of exhaust air and fumes. They automatically close when the fan is turned off. Constructed of heavy gauge aluminum and reinforced with two full length hinge brackets for extra durability.
DRIVES
All drives use heavy-duty type neoprene spark proof, oil, and heat resistant V-Belts. Drives are 1 or 2 belt combinations depending on horsepower. Motor and fan sheaves are cast iron.
BEARINGS
Pre-lubricated bearings are used in a duplex split pillow block bearing housing. The bearings remain in perfect alignment after shipment, installation, and subsequent operation. Bearings are resiliently mounted in neoprene rings, providing extra protection and vibration isolation. The bearing assembly is rated at an L-50 life of 200,000 hours. Acme provides a 5 Year Limited Warranty on duplex split pillow block bearings and shaft. Unitary pillow block bearings are used on UBH60, UBH-UF and UBH-SE models.
STAINLESS HINGE PINS
Positive damper action is insured by stainless steel hinge pins in nylon bearings for quieter, low friction operation. No lubrication required.
MAGNETIC LATCHES/DRAINAGE TROUGH
Weather protection is provided by magnetic latches that hold dampers closed when the exhauster is not in use. A water trough is positioned under the butterfly damper hinge to provide drainage for rain, melting ice, and snow.
RUBBER BUMPERS
Dampers open and close against rubber bumpers for quieter operation.
PROPELLERS
Propellers utilize the high efficiency circular arc airfoil blade design. Constructed of all welded heavy gauge aluminum (except UBH54, UBH-UF and UBH-SE Models, which are steel). All other sizes available with steel construction. Precision balanced.
HOUSING
Standard construction of windband, curb-base, housing and frame is of heavy gauge steel with an epoxy finish.
MOTOR WEATHER COVER
Motor weather covers protect motor and drive from adverse weather conditions.
STREAMLINED BELT & BEARING ENCLOSURE
Full streamline virtually eliminates the turbulence and air drag produced by conventional belt enclosures. Bearings are ventilated with outside air for cooler operation. Maximum recommended temperature of UBH model not to exceed 200°F.
EPOXY FINISH
A tough baked-on acrylic epoxy is the standard finish inside and out for all steel parts. Access door, motor cover, aluminum prop, and butterfly dampers are not coated. Attractive in appearance, it is a multi-purpose finish that provides exceptional resistance to attack by many chemicals and corrosive agents. Metal surfaces are prepared prior to painting by an iron phosphate process for superior rust protection and bonding of the paint to the base metal.
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