Loren Cook ACRU-HP - User Manual

This publication contains the installation, operation and
maintenance instructions for standard units of the AC-
Centrifugal Roof and Wall Exhausters.
• ACE-D / ACE-B
• ACW-D / ACW-B / ACW-HP / ACW-XP
• ACRU-D / ACRU-B / ACRU-HP / ACRU-XP
Carefully read this publication and any
supplemental documents prior to any
installation or maintenance procedure.
Loren Cook AC catalog provides additional information
describing the equipment, fan performance, available
accessories, and specification data.
For additional safety information, refer to AMCA
publication 410-96, Safety Practices for Users and Installers
of Industrial and Commercial Fans.
All of the publications listed above can be obtained from
Loren Cook Company by phoning (417)869-6474,
extension 166; by FAX at (417)832-9431; or by e-mail at
info@lorencook.com.
For information and instructions on special equipment,
contact Loren Cook Company at 417.869-6474.
Receiving and Inspection
Immediately upon receipt of an AC fan, carefully inspect
the fan and accessories for damage and shortage.
• Turn the wheel by hand to ensure it turns freely and
does not bind.
• Check dampers (if included) for free operation of all
moving parts.
• Record on the Delivery Receipt any visible sign of
damage.
Rotating Parts & Electrical Shock Hazard:
Disconnect electric power before working on unit.
Follow proper lockout / tagout procedures to ensure
the unit cannot be energized while being installed or
serviced.
A disconnect switch should be placed near the fan in
order that the power can be swiftly cut off, in case of
an emergency and in order that maintenance
personnel are provided complete control of the power
source.
Grounding is required. All field-installed wiring must
be completed by qualified personnel. All field-
installed wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.
Failure to follow these instructions could result in
death or serious injury.
Centrifugal Roof and Wall Exhausters
INSTALLATION, OPERATION AND MAINTENANCE
Handling
Lift the fan by the shipping
carton or lifting lugs provided
under top cap. NOTICE! Never
lift by the shaft, motor or
housing.
Storage
If the fan is stored for any
length of time prior to installation,
store it in its original shipping
crate and protect it from dust,
debris and the weather.
Installation
If the fan was delivered with the motor unmounted, see
the maintenance section for belt and pulley installation.
If the fan was purchased as a wall mount unit and a
grease terminator or grease trough was not purchased, a 1-
1/16 inch diameter drain hole should be drilled at the bottom
side of the fan for drainage.
Code requirements and environmental effects
The attachment of roof mounted fans to the roof curb
as well as the attachment of roof curbs to the building
structure must exceed the structural requirements
based on the environmental loading derived from the
applicable building code for the site. The local code
official may require variations from the recognized
code based on local data. The licensed engineer of
record will be responsible for prescribing the correct
attachment based on construction materials, code
requirements and environmental effects specific to
the installation.
Failure to follow these instructions could result in
death or serious injury.
AC
Lifting Lugs
®

Summary

INSTALLATION, OPERATION AND MAINTENANCE

Handling and Storage

Proper methods for lifting, moving, and storing the fan unit.

Installation Basics

General installation steps, including motor mounting and drain hole requirements.

Safety Warnings & Inspection

Critical safety measures, electrical hazards, and receiving inspection procedures.

Specific Installation Procedures

Wall Exhauster and Damper Installation

Specific instructions for installing wall-mounted units and dampers.

Wiring Installation and Diagrams

Detailed guide for electrical wiring connections, including diagrams for various motor types.

Operational and Maintenance Procedures

Final Installation Steps

Final checks and procedures after installing the fan, including torque and voltage checks.

Start-up and Inspection

Steps for safely starting the fan and initial inspection intervals.

Maintenance Guidelines

Guidelines for regular maintenance, including inspection frequency and specific component checks.

Fan Components and Adjustments

Fan and Motor Bearings

Information on fan and motor bearings, lubrication, and service.

Changing Shaft Speed

Steps to adjust fan speed using variable pitch pulleys and RPM limits.

Component Service and Replacement

Pulleys, Belts, and Alignment

Instructions for replacing pulleys and belts, and ensuring proper pulley alignment.

Bearing and Wheel Replacement

Procedures for replacing fan bearings and removing the fan wheel.

Performance and Troubleshooting

Wheel-to-Inlet Clearance

Importance of correct clearance for fan performance and adjustment method.

Troubleshooting Guide

Common problems, potential causes, and recommended solutions for fan operation.

Parts Lists: ACE-D and ACE-B

ACE-D Parts List

Detailed component list and diagram for ACE-D models, sizes 70-100 and 120-180.

Parts Lists: ACE-B and ACW-D

ACE-B Parts List

Detailed component list and diagram for ACE-B models, various size ranges.

Parts Lists: ACW-D and ACW-B

ACW-D Parts List

Detailed component list and diagram for ACW-D models, sizes 70-100 and 120-195.

Parts Lists: ACW-B and ACRU-D

ACW-B Parts List

Detailed component list and diagram for ACW-B models, size ranges 100, 120-165, and 180-245.

Parts Lists: ACRU-D and ACRU-B

ACRU-D Parts List

Detailed component list and diagram for ACRU-D models, sizes 70-100 and 120-195.

ACRU-B Parts List

Detailed component list and diagram for ACRU-B models, size ranges 100, 120-245, and 270-490.

Limited Warranty

Warranty Terms and Conditions

Details Loren Cook Company's one-year limited warranty on fans, exclusions, and claim procedures.

Motor Warranty

Information regarding the separate warranty provided by motor manufacturers for furnished motors.

Loren Cook ACRU-HP Specifications

General

Wheel Type	Backward Inclined
Housing Material	Galvanized Steel
Speed	Variable
Fan Type	Centrifugal
Motor Power	0.5 to 15 HP
Construction	Heavy-duty
Mounting	Roof
Applications	Commercial, Industrial