Loren Cook ACRU-B User Manual

Typical Specifications

Model:

Description:

Certifications:

Construction:

Wheel:

Motor:

Bearings:

Belts & Drives:

Product:

ACRU-B

Fan shall be a spun aluminum, roof mounted, belt driven, upblast centrifugal
exhaust ventilator.

Fan shall be manufactured at an ISO 9001 certified facility. Fan shall be listed by
Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705). Fan
shall bear the AMCA certified ratings seal for sound and air performance.

The fan shall be of bolted and welded construction utilizing corrosion resistant
fasteners. The spun aluminum structural components shall be constructed of
minimum 16 gauge marine alloy aluminum, bolted to a rigid aluminum support
structure. The aluminum base shall have a one piece inlet spinning and
continuously welded curb cap corners for maximum leak protection. The
windband shall have a rolled bead for added strength. A two piece top cap shall
have stainless steel quick release latches to provide access into the motor
compartment without the use of tools. An integral conduit chase shall be
provided into the motor compartment to facilitate wiring connections. The motor,
bearings and drives shall be mounted on a minimum 14 gauge steel power
assembly, isolated from the unit structure with rubber vibration isolators. These
components shall be enclosed in a weather-tight compartment, separated from
the exhaust airstream. Lifting lugs shall be provided to help prevent damage
from improper lifting. Unit shall bear an engraved aluminum nameplate.
Nameplate shall indicate design CFM, static pressure, and maximum fan RPM.
Unit shall be shipped in ISTA certified transit tested packaging.

Wheel shall be centrifugal backward inclined, constructed of 100 percent
aluminum, including a precision machined cast aluminum hub. Wheel inlet shall
overlap an aerodynamic aluminum inlet cone to provide maximum performance
and efficiency. Wheel shall be balanced in accordance with AMCA Standard
204-96, Balance Quality and Vibration Levels for Fans.

Motor shall be heavy duty type with permanently lubricated sealed ball bearings
and furnished at the specified voltage, phase and enclosure.

Bearings shall be designed and individually tested specifically for use in air
handling applications. Construction shall be heavy duty regreasable ball type in a
cast iron pillow block housing selected for a minimum L50 life in excess of
200,000 hours at maximum cataloged operating speed.

Belts shall be oil and heat resistant, non-static type. Drives shall be precision
machined cast iron type, keyed and securely attached to the wheel and motor
shafts. Drives shall be sized for 150 percent of the installed motor horsepower.
The variable pitch motor drive must be factory set to the specified fan RPM.

Fan shall be model ACRU-B as manufactured by
Loren Cook Company of Springfield, Missouri.

10/20/03