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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Most Acme JETMASTER™ fans are
listed by the Canadian Standards
Association Testing Laboratory as
approved. Consult the Acme
representative for availability.

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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