Loren Cook ACRU-D - 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 Fan Units

Safe lifting techniques for the fan, emphasizing proper lifting points.

Fan Storage Guidelines

Recommendations for storing the fan to prevent damage from elements.

General Installation Procedures

Overview of fan installation, including motor mounting and drainage holes.

Critical Safety Warnings

Important alerts regarding rotating parts, electrical shock, and proper lockout/tagout.

Receiving and Inspection Process

Steps to inspect the fan upon arrival for damage and operational readiness.

Wall Exhauster Installation

Damper Installation

Steps for installing dampers, ensuring free operation and correct airflow direction.

Wiring Installation

Guidelines for electrical wiring, adhering to local codes and motor nameplate specifications.

Final Installation Checks

Torque and Fastener Tightness

Ensuring all fasteners are tightened to recommended torque specifications.

Electrical System Verification

Confirming correct amperage and voltage for safe fan operation.

Fan Rotation Direction

Critical check to ensure correct fan rotation to prevent motor damage.

Fan Operation and Monitoring

Initial Start-up Steps

Procedures for powering on the fan for the first time.

Operational Inspection Intervals

Scheduled checks at 30 min, 8 hr, and 24 hr for performance monitoring.

Routine Maintenance Scheduling

Establishing a schedule for regular fan inspections and maintenance tasks.

Fan Bearings and Lubrication

Fan Bearing Relubrication

Intervals and methods for relubricating fan bearings based on operating conditions.

Motor Bearing Maintenance

Procedures for motor bearing care, including lubrication and service.

Changing Fan Shaft Speed

Instructions for adjusting fan speed using variable pitch pulleys.

Pulley and Belt Maintenance

Pulley Alignment Procedure

Steps to ensure proper alignment between motor and fan pulleys.

Bearing Replacement Guide

Process for replacing pillow block ball bearings on the fan.

Wheel Removal Technique

Method for safely removing the fan wheel using a puller.

Wheel-to-Inlet Clearance Adjustment

Troubleshooting Fan Performance

Low Capacity or Pressure Issues

Diagnosing and resolving problems related to reduced fan output.

Vibration and Noise Diagnosis

Identifying causes and solutions for excessive fan vibration and noise.

Motor Overheating Causes and Fixes

Troubleshooting steps for motor overheating problems.

Bearing Overheating Solutions

Identifying causes and fixes for fan bearing overheating.

ACE-D Parts Identification

ACE-D Sizes 70-100 Parts List

Parts list and diagram for ACE-D fan models 70-100.

ACE-D Sizes 120-180 Parts List

Parts list and diagram for ACE-D fan models 120-180.

ACE-B Parts Identification

ACE-B Model Parts Breakdown

Detailed parts list for ACE-B fan models across various sizes.

ACW-D Parts Identification

ACW-D Sizes 70-100 Parts List

Parts list and diagram for ACW-D fan models 70-100.

ACW-D Sizes 120-195 Parts List

Parts list and diagram for ACW-D fan models 120-195.

ACW-B Parts Identification

ACW-B Model Parts Breakdown

Detailed parts list for ACW-B fan models across various sizes.

ACRU-D Parts Identification

ACRU-D Sizes 70-100 Parts List

Parts list and diagram for ACRU-D fan models 70-100.

ACRU-D Sizes 120-195 Parts List

Parts list and diagram for ACRU-D fan models 120-195.

ACRU-B Parts Identification

ACRU-B Model Parts List

Detailed parts list for ACRU-B fan models across various sizes.

Limited Warranty Information

Loren Cook ACRU-D Specifications

General

Brand	Loren Cook
Model	ACRU-D
Category	Fan
Language	English