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Square Centrifugal Inline Fan

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

SQI

This publication contains the installation, operation and

maintenance instructions for standard units of the SQI

Square Centrifugal Inline Fans.

Carefully read this publication and any

supplemental documents prior to any

installation or maintenance procedure.

Loren Cook catalog SQI 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

[email protected].

For information on special equipment, contact Loren

Cook Company Customer Service Department at

(417)869-6474.

Receiving and Inspection

Carefully inspect the fan and accessories for any

damage and shortage immediately upon receipt of the fan.

• 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 base or lifting eyes. NOTICE! Never

lift by the shaft, motor, or housing.

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.

SQI-B

Storage

If fan is stored for any length of time, prior to installation,

completely fill bearings with grease or moisture-inhibiting

oil. Refer to page 4. Store the fan in its original crate and

protect from dust, debris, and weather. To maintain good

working condition of a SQL when it’s stored outdoors, or on

a construction site follow the additional steps below.

• Cover the inlet and outlet, and belt tunnel opening to

prevent accumulation of dust and moisture in the

housing.

• Periodically rotate the wheel and operate dampers (if

supplied) to keep a coating of grease on all internal

bearing parts.

• Periodically inspect the unit to prevent damaging

conditions.

Installation

To prevent damage to the fan during shipping, motors 5

HP and larger, and extremely heavy motors (cast iron or

severe duty) are shipped loose and must be field mounted

by bolting the motor on the motor mounting plate in the

existing mounting slots.

Wiring Installation

NOTICE! All wiring should be in accordance

with local ordinances and the National Electrical

Code, NFPA 70. Ensure the power supply

(voltage, frequency, and current carrying

capacity of wires) is in accordance with the

motor nameplate. Refer to the Wiring Diagrams,

on page 3.

Direct drive - Wire the electrical box on the blower

housing.

Belt drive - The motor can be wired directly since the

motor is external to the fan.

1 2 3 4 5 6 7 8

Inhaltsverzeichnis

Seite 1

Square Centrifugal Inline FanINSTALLATION, OPERATION, AND MAINTENANCE MANUALSQIThis publication contains the installation, operation and maintenance i

Seite 2 - Inspection

2Wiring Installation (continued)Leave enough slack in the wiring to allow for motor move-ment when adjusting belt tension. Some fractional motors hav

Seite 3 - Wiring Diagrams

3FanMotorDamperMotor*SecondDamperMotorTransformer**Transformer**L3L2L1Wiring DiagramsWhen ground is required, attach to ground A or B with no. 6 threa

Seite 4 - Fan Bearings

4around the bearing seals. Excessive grease can damage seal and reduce life through excess contamination and/or loss of lubricant.In the event that th

Seite 5 - Changing Fan Speed

5Changing Fan SpeedAll belt driven fans with motors up to and including 5 HP are equipped with variable pitch pulleys.a. Loosen setscrew on motor pull

Seite 6 - Troubleshooting

6TroubleshootingProblem and Potential CauseLow Capacity or Pressure•Incorrect direction of rotation. Make sure the fan rotates in same direc-tion as t

Seite 7 - SQI-D Parts List

7SQI-D Parts ListPartNo.DescriptionSizes 70-90 Size 120 Size 135 Sizes 150-1651 Hex Bolts) Hex Bolt Hex Bolt Hex Bolt2 Inlet Panel Inlet Panel Inlet

Seite 8 - SQI-B Parts List

8Corporate Offices: 2015 E. Dale Street Springfield, MO 65803 417.869.6474lorencook.comSQI IOM - Jan 2014Limited WarrantyLoren Cook Company warrants