COOK SQN Series - User Manual

1SQN IO&M B51141-004
®
Receiving
Inspection
Immediately, upon receipt of an SQN fan, carefully in-
spect the fan and accessories for damage and shortage.
• Turn the wheel by hand to ensure it turns freely and does
not bind.
• Inspect dampers for free operation of all moving parts
• Record on the Delivery Receipt any visible sign of damage.
Handling
Lift the fan by the lifting holes.
NOTICE! Never lift by the shaft, motor or housing.
SQN-B
Lifting HolesLifting Holes
SQN
Centrifugal Square Inline Fans
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Rotating Parts & Electrical Shock Hazard:
Fans should be installed and serviced by qualied person-
nel only.
Disconnect electric power before working on unit (prior to
removal of guards or entry into access doors).
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 o󰀨, in case of an emer-
gency and in order that maintenance personnel are pro-
vided complete control of the power source.
Grounding is required. All eld-installed wiring must be
completed by qualied personnel. All eld installed wiring
must comply with National Electric Code (NFPA 70) and all
applicable local codes.
Fans and blowers create pressure at the discharge and
vacuum at the inlet. This may cause objects to get pulled
into the unit and objects to be propelled rapidly from the
discharge. The discharge should always be directed in a
safe direction and inlets should not be left unguarded. Any
object pulled into the inlet will become a projectile capable
of causing serious injury or death.
When air is allowed to move through a non-powered fan,
the impeller can rotate, which is referred to as windmill-
ing. Windmilling will cause hazardous conditions due to
unexpected rotation of components. Impellers should be
blocked in position or air passages blocked to prevent draft
when working on fans.
Friction and power loss inside rotating components will
cause them to be a potential burn hazard. All components
should be approached with caution and/or allowed to cool
before contacting them for maintenance.
Under certain lighting conditions, rotating components
may appear stationary. Components should be veried to
be stationary in a safe manner, before they come into con-
tact with personnel, tools or clothing.
Failure to follow these instructions could result in death or
serious injury.
The attachment of roof mounted fans to the roof curb as
well as the attachment of roof curbs to the building struc-
ture must exceed the structural requirements based on the
environmental loading derived from the applicable build-
ing code for the site. The local code o󰀩cial may require
variations from the recognized code based on local data.
The licensed engineer of record will be responsible for pre-
scribing the correct attachment based on construction ma-
terials, code requirements and environmental e󰀨ects spe-
cic to the installation.
This publication contains the installation, operation and
maintenance instructions for standard units of the SQN:
Centrifugal Square Inline Fans.
Carefully read this publication and any
supplemental documents prior to any
installation or maintenance procedure.
Loren Cook catalog, SQN, provides additional informa-
tion describing the equipment, fan performance, available
accessories and specication data.
For additional safety information, refer to AMCA Publi-
cation 410-96, Safety Practices for Users and Installers of
Industrial and Commercial Fans.
All of the publications listed above can be obtained from:
• lorencook.com
• info@lorencook.com
• 417-869-6474 ext. 166
For information and instructions on special equipment,
contact Loren Cook Company at 417-869-6474.

Summary

Receiving

Inspection

Inspect fan and accessories for damage and shortage upon receipt. Check wheel rotation and dampers.

Handling

Lift the fan by the designated lifting holes. Never lift by the shaft, motor, or housing.

Safety Warnings

Rotating Parts & Electrical Shock Hazard

Fans should be installed and serviced by qualified personnel. Disconnect power before work.

Storage

Wiring Diagrams

Vari-Flow

Refers to external supplements for EC or VF2 motor wiring.

Single Speed, Single Phase Motor

Wiring for single speed, single phase motors, including grounding and reversal.

2 Speed, 2 Winding, Single Phase Motor

Wiring for 2-speed, 2-winding single phase motors, including grounding and reversal.

Single Speed, Single Phase, Dual Voltage

Wiring for dual voltage single phase motors, including grounding and reversal.

3 Phase, 9 Lead Motor Y-Connection

Wiring diagram for 3-phase, 9-lead Y-connected motors, including reversal.

3 Phase, 9 Lead Motor Delta-Connection

Wiring diagram for 3-phase, 9-lead delta-connected motors, including reversal.

2 Speed, 1 Winding, 3 Phase Motor

Wiring for 2-speed, 1-winding 3-phase motors requiring magnetic control.

2 Speed, 2 Winding, 3 Phase

Wiring for 2-speed, 2-winding 3-phase motors, including reversal for each speed.

Typical Damper Motor Schematic

Schematic showing typical damper motor connections for single and 3-phase applications.

Installation

Motor Installation

Instructions for mounting motors (3 HP and larger, or heavy) that are shipped loose.

Wiring Installation

General guidelines for wiring installation, referencing NEC and diagrams.

Direct Drive

Instructions for wiring the electrical box on the blower housing for direct drive units.

Belt Drive

Wiring instructions for belt drive units, including slack and motor removal.

Belt and Pulley Installation

Guidance on belt tension, pulley adjustment, and alignment for belt-driven fans.

Pulley Alignment

Details on adjusting pulley alignment using set screws and checking for gaps.

Blower Installation

Optional Side Discharge Installation

Final Installation Steps

Operation

Pre-Start Checks

Steps to perform before starting the fan, including power lockout and fastener checks.

Start Up

Inspection Intervals

30 Minute Interval

Inspect bolts, setscrews, and motor mounting bolts after 30 minutes of operation.

8 Hour Interval

Inspect belt alignment and tension after 8 hours of operation.

24 Hour Interval

Inspect belt tension after 24 hours of operation.

Maintenance Schedule

General Maintenance

Inspect bolts, belts, bearings, and cleanliness regularly as per recommendations.

Fan Bearings

Relubrication Intervals

Guidelines for relubricating fan bearings based on operating conditions and RPM.

Motor Services

Changing Fan Speed

Pulley and Belt Replacement

Bearing Replacement

Wheel Replacement

Wheel-to-Inlet Clearance

Troubleshooting

Low Capacity or Pressure

Potential causes for low fan capacity or pressure, including rotation and inlet conditions.

Excessive Vibration and Noise

Causes of excessive vibration and noise, such as unbalanced wheels, belts, or bearings.

Overheated Motor

Troubleshooting steps for an overheated motor, including wiring, rotation, and voltage.

Overheated Bearings

Potential causes for overheated bearings, such as lubrication or belt tension issues.

Parts Lists

SQN-B;SQN-HP Side Discharge Parts

SQN-D

SQN-D Side Discharge

Limited Warranty

COOK SQN Series Specifications

General

Model	SQN Series
Power Consumption	Varies by model
Noise Level	Varies by model
Frequency	60 Hz
Material	Galvanized Steel
Weight	Varies by model