Loren Cook QMXD-HP, QMXS, QMX, QMXS-HP, QMXE-HP Installation, Operation And Maintenance Manual

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Page 1

OPERATION & MAINTENACE

MANUAL

FANS

Job Name: MICKEY LELAND CPAYM

Location: HOUSTON, TEXAS

Architect: HARRISON KORNBERG

Engineer: SHAH SMITH & ASSOCIATES

Contractor: ENVIROTECH MECHANICAL

Date: APRIL 20, 2016

Submitted By: RUSTY REED

A Certified Minority Owned Small Business Enterprise

P. O. Box 630409, Houston, TX 77263-0409

Phone: (713) 266-1761 Fax: (713) 781-6532

www.distribaire.com

Page 2

QMX

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation and maintenance instructions for standard units of the QMX-Mixed Flow Inline.

• QMX • QMXD-HP • QMX-HP • QMXE

• QMXS • QMXE-HP • QMXS-HP • QMXU

• QMXU-HP • QMXLE • QMXLE-HP

Carefully read this publication prior to any installation or maintenance procedure.

Loren Cook catalog, QMX, 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 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 inlet vane dampers (if supplied) for free operation of all moving parts.

• Record on the Delivery Receipt any visible sign of

damage.

WARNING

This unit has rotating parts. Safety precautions should be exercised at all times during installation, operation, and maintenance. ALWAYS disconnect power prior to working on fan.

Handling

Lift the fan by lifting lugs. Never lift by the shaft, motor, or

housing.

Mixed Flow Inline

• Periodically inspect the unit to prevent damaging conditions.

Personal Safety

Disconnect switches are recommended. Place the disconnect switch 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.

Installation

QMX and QMX-HP can be mounted horizontally or vertically to a floor or a ceiling in various motor positions and discharges. QMXU, QMXU-HP, QMXE, QMXE-HP, QMXS and QMXS-HP are all designed to be roof mounted on typical roof curbs. The QMXLE or QMXLE-HP units, however, should not be mounted on sheet metal roof curbs, but supported by integral members of the roof structure, designed and constructed by others per local requirements and environments.

Most motors are shipped mounted on the fans with belts and drives installed. However, extremely heavy motors are shipped separately, and some motors are shipped separately due to height limitations. These motors and drives will require field installation.

NOTE

Although a certain amount of vibration is inherent in operating fans, extreme vibration is a serious problem that may cause structural and mechanical failure.

Isolation Installation

To help prevent vibration and noise from being transferred

to the building, isolators are recommended.

Floor Mounted Spring Isolators

a. Mount fan on isolation base or rails (if supplied). b. Elevate fan (or isolation base) to operating height and

insert blocks to hold in position.

c. Position isolators under the fan and vertically align by

inserting leveling bolt through mounting holes in the fan or the base. The isolator must be installed on a level surface.

Storage

If the fan is stored for any length of time prior to installation, completely fill the bearings with grease or moistureinhibiting oil. Refer to Lubricants on page 6. Also, store the fan in its original crate and protect it from dust, debris and the weather.

• Cover the inlet and outlet, and belt tunnel opening to prevent the accumulation of dirt and moisture in the housing.

• Periodically rotate the wheel and operate inlet vane dampers (if supplied) to keep a coating of grease on all internal bearing parts.

QMX

Page 3

d. Adjust the isolators by turning the leveling nut counter

clockwise several turns at a time alternately on each isolator until the fan weight is transferred onto the isolators and the fan raises uniformly off the blocks. Then remove the blocks.

e. Turn lock nut onto leveling bolt and secure firmly in

place against the top of the mounting flange or frame.

f. Secure isolators to mounting surface.

Spring Isolator

Figure 1 -Floor Mount Isolators

Rubber-In-Shear Isolator

Floor Mounted Rubber-In-Shear (RIS) Isolators

a. Mount fan on isolation base or rails (if supplied). b. Elevate fan to provide room to insert isolators

between the fan and foundation and block in position. c. Position isolators under fan and secure bolts. d. Remove blocks and allow fan to rest on floor. Isolators

must be installed on a level surface (leveling should

not be required). e. Secure isolators to mounting surface.

Ceiling Mounted Spring and Rubber-in-Shear (RIS) Isolators

a. Elevate fan to operating height and brace. b. Attach threaded rod to overhead support structure

directly above each mounting hole. Rod should extend

to within a few feet of fan. c. Attach isolator to end of threaded rod using a nut on

each side of isolator bracket. d. Insert another section of threaded rod through the fan

mounting hole and isolator. e. Attach two nuts to threaded rod in isolator. f. Place adjusting nut and locking nut on threaded rod

near fan mounting bracket. g. Alternately rotate adjusting nut at each mounting loca-

tion until the fan weight is uniformly transferred to the

isolators. Remove bracing.

duct diameter of straight duct before placing an elbow or damper. Clearance is also required on the inlet and outlet for maintenance such as pulley or bearing replacement.

Non-Ducted Inlet Clearance

If your fan has an open inlet (no duct work), the fan must be placed 1 effective wheel diameter away from walls and bulkheads.

MIN

1 DIA

Non-ducted Inlet Clearance

Free Discharge

Avoid a free discharge into the plenum. This will result in lost efficiency because it doesn’t allow for a static regain.

Correct

Free Discharge

Incorrect

Inlet Duct Turns

For ducted inlets, allow at least 3 effective wheel diameters between duct turns or elbows and the fan inlet.

MIN

Correct

Incorrect

Inlet Duct Turns

3 DIA

Discharge Duct Turns

Where possible, allow 3 duct diameters between duct turns or elbows and the fan outlet. Refer to the drawing below.

Ceiling Mounted Spring Isolator

Figure 2 - Ceiling Mount Isolators

Rubber-In-Shear Ceiling Isolators

Duct and Damper Installation

Efficient fan performance relies on the proper installation of inlet and discharge ducts, as well as dampers. Be sure your fan conforms to the guidelines below and allows 3

Correct

MIN

3 DIA

Incorrect

Discharge Duct Turns

Page 4

Wheel-to-Inlet Clearance

1 foot

1/4 inch

The correct wheel-to-inlet clearance is critical to proper fan performance. This clearance should be verified before initial start-up since rough handling during shipment could cause a shift in fan components. Refer to wheel/inlet drawing below for correct overlap.

Adjust the overlap by loosening the wheel hub and moving the wheel along the shaft to obtain the correct value. Trim balance as necessary following procedure (.0785 in/sec max).

A uniform radial gap (space between the edge of the cone and the edge of the inlet) is obtained by loosening the inlet cone bolts and repositioning the inlet cone.

SEE DETAIL A

OVERLAP

RADIAL GAP

DETAIL A

Wheel/Inlet Overlap

Unit

Overlap

Size

(Inches)

90 0.16

120 0.19

135 0.20

150 0.22

165 0.23

180 0.24

202 0.27

225 0.29

245 0.31

270 0.33

300 0.37

330 0.41

365 0.45

402 0.50

445 0.55

490 0.61

540 0.67

600 0.76

Belt and Pulley Installation

Belt tension is determined by the sound the belts make when the fan is first started. Belts will produce a loud squeal which dissipates after the fan is operating at full capacity. If the belt tension is too tight or too loose, lost efficiency and possible damage can occur.

Do not change the pulley pitch diameter to change tension. This will result in a different fan speed.

a. Loosen motor plate adjustment bolts and move motor

plate in order that the belts can easily slip into the grooves on the pulleys. Never pry, roll, or force the belts over the rim of the pulley.

b. Adjust the motor plate until proper tension is reached.

For proper tension, a deflection of approximately 1/4” per foot of center distance should be obtained by firmly

pressing the belt. Refer to Figure 3. c. Lock the motor plate adjustment nuts in place. d. Ensure pulleys are properly aligned. Refer to Figure 4.

Tolerance

Center Distance

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

Figure 4

Maximum

Gap

OFFSET ANGULAR OFFSET/ANGULAR

CENTER

DISTANCE

(CD)

GAP

Figure 4 indicates where to measure the allowable gap for the drive alignment tolerance. All contact points (indicated by WXYZ) are to have a gap less than the tolerance shown in the table. When the pulleys are not the same width, the allowable gap must be adjusted by half of the difference in width. Figure 5 illustrates using a carpenter’s square to adjust the position of the motor pulley until the belt is parallel to the longer leg of the square.

Figure 5

Wiring Installation

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.

Lock off all power sources before unit is wired to power source.

Leave enough slack in the wiring to allow for motor movement when adjusting belt tension. Some fractional motors have to be removed in order to make the connection with the terminal box at the end of the motor. To remove motor, remove bolts securing motor base to power assembly. Do not remove motor mounting bolts.

Personal Safety

Follow the wiring diagram in the disconnect switch and the wiring diagram provided with the motor. Correctly label the circuit on the main power box and always identify a closed switch to promote safety (i.e., red tape over a closed switch).

Figure 3

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pulley

setscrew and by moving the motor pulley on the motor shaft.

Page 5

Use of Variable Frequency Drives

Motors -

Motors that are to be operated using a Variable Frequency Drive (VFD) must be VFD compatible. At a minimum, this must be a Premium Efficiency motor with Class F insulation. Motors that are not supplied by Loren Cook Company should have the recommendation of the motor manufacturer for use with a VFD.

Grounding -

The fan frame, motor and VFD must be connected to a common earth ground to prevent transient voltages from damaging rotating elements.

Wiring -

Line reactors may be required to reduce over-voltage

spikes in the motors. The motor manufacturer should be

Wiring Diagrams

consulted for recommended line impedance and usage of line reactors or filters, if the lead length between the VFD and the motor exceeds 10 feet (3m).

Fan -

It is the responsibility of the installing body to perform coast-down tests and identify any resonant frequencies after the equipment is fully installed. These resonant frequencies are to be removed from the operating range of the fan by using the “skip frequency” function in the VFD programming. Failure to remove resonant frequencies from the operating range will decrease the operating life of the fan and void the warranty.

Single Speed, Single Phase Motor

Ground A

T-1

T-4

Line

Ground B

When ground is required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-1 and T-4.

2 Speed, 2 Winding, Single Phase Motor

Ground A

High Speed

T-1

T-4

Ground B

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-1 and T-4 leads.

Low Speed

Line

3 Phase, 9 Lead Motor Y-Connection

Low Voltage

208/230 Volts

1 728

To reverse, interchange any 2 line leads.

3 9

L2L

High Voltage

460 Volts

456

789

L2L

3 Phase, 9 Lead Motor Delta-Connection

Low Voltage

208/230 Volts

High Voltage

9 5

460 Volts

789

456

2 Speed, 1 Winding, 3 Phase Motor

High Speed

Together

Motor

To reverse, interchange any 2 line leads. Motors require magnetic control.

Line

Low Speed

Motor

Open

Line

4 5

Single Speed, Single Phase, Dual Voltage 2 Speed, 2 Winding, 3 Phase

Ground A

Line

T-5

J-10

Ground B

T-5

J-10

Ground B

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-5 and J-10 leads.

Link A

Link B

Low Voltage

Ground A

Link A & B

Line

To reverse: High Speed-interchange leads T11 and T12. Low Speed-interchange leads T1 and T2. Both Speeds-interchange any 2 line leads.

Page 6

Typical Wiring Path for Roof Mounted Units

For sizes 135-600, route conduit under motor cover between the motor support rails and out to enclosure as shown in Figure 1 below.

Figure 1

ble to interchange two leads at this location so that the fan is operating in the correct direction.

QMX

QMX-HP

Size 135-600, Run Liquidtite Between Weather Cover and Unit

Liquidtite

For sizes 90-120, route conduit through holes in the sides of the motor support saddle as shown in Figure 2 below.

Figure 2

90-120, Run Liquidtite Through Holes in Saddle

Enclosure May Be Located in Either Corner (Liquidtite Not Shown)

Wheel Rotation

Test the fan to ensure the rotation of the wheel is the same as indicated by the arrow marked Rotation.

115 and 230 Single Phase Motors

Fan wheel rotation is set correctly at the factory. Changing the rotation of this type of motor should only be attempted by a qualified electrician.

208, 230, and 460, 3 Phase Motors

These motors are electrically reversible by switching two of the supply leads. For this reason, the rotation of the fan cannot be restricted to one direction at the factory. See Wiring Diagrams for specific information on reversing wheel direction.

Do not allow the fan to run in the wrong direction. This will overheat the motor and cause serious damage. For 3-phase motors, if the fan is running in the wrong direction, check the control switch. It is possi-

Weather Cover

Final Installation Steps

a. Inspect fasteners and setscrews, particularly fan

mounting and bearing fasteners, and tighten according to the recommended torque shown in the table

Recommended Torque for Setscrews/Bolts. b. Inspect for correct voltage with voltmeter. c. Ensure all accessories are installed.

Operation

Pre-Start Checks

a. Lock out all the primary and secondary power

sources. b. Ensure fasteners and setscrews, particularly those

used for mounting the fan, are tightened. c. Inspect belt tension and pulley alignment. d. Inspect motor wiring. e. Ensure belt touches only the pulley. f. Ensure fan and ductwork are clean and free of debris. g. Inspect wheel-to-inlet clearance. The correct wheel-

to-inlet clearance is critical to proper fan performance. h. Close and secure all access doors. g. Restore power to the fan.

Start Up

Turn the fan on. In variable speed units, set the fan to its

lowest speed and inspect for the following:

• Direction of rotation.

• Excessive vibration.

• Unusual noise.

• Bearing noise.

• Improper belt alignment or tension (listen for squealing).

• Improper motor amperage or voltage.

If a problem is discovered, immediately shut the fan off. Lock out all electrical power and check for the cause of the trouble. See Troubleshooting.

Inspection

Inspection of the fan should be conducted at the first 30

minute, 8 hour and 24 hour intervals of satisfactory opera-

tion. During the inspections, stop the fan and inspect as per the Conditions Chart.

30 Minute Interval

Inspect bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.

8 Hour Interval

Inspect belt alignment and tension. Adjust and tighten as necessary.

24 Hour Interval

Inspect belt tension. Adjust and tighten as necessary.

Page 7

Recommended Torque for Setscrews/Bolts

Setscrews

Size

No.10 3/32” 28 33 3/8”-16 240

1/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 1200

3/8” 3/16” 228 275 3/4”-10 2100

7/16” 7/32” 29 348 7/8”-9 2400

1/2” 1/4” 42 504 1” -8 3000

5/8” 5/16” 92 1104

3/4” 3/8” 120 1440

Key Hex

Across

Flats

Recommended

Torque

Min. Max. Size

(IN/LB)

Hold Down Bolts

Wrench

Torque

Maintenance

Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and location of the fan.

Inspect fans exhausting corrosive or contaminated air within the first month of operation. Fans exhausting contaminated air (airborne abrasives) should be inspected every three months.

Regular inspections are recommended for fans exhausting non-contaminated air.

It is recommended the following inspection be conducted twice per year.

• Inspect bolts and setscrews for tightness. Tighten as necessary.

• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. Refer to Belt and Pulley Installation, page 3.

• Bearings should be inspected as recommended in the Conditions Chart.

• Inspect variable inlet vanes (if supplied) for freedom of operation and excessive wear. The vane position should agree with the position of the control arm. As the variable inlet vanes close, the entering air should spin in the same direction as the wheel.

• Inspect springs and rubber isolators for deterioration and replace as needed.

• Inspect for cleanliness. Clean exterior surfaces only. Removing dust and grease on motor housing assures proper motor cooling. Removing dirt from the wheel and housing prevents imbalance and damage.

Lubrication - Fan Bearings

QMX bearings are lubricated through a grease fitting on the outer housing and should be lubricated by the schedule, Conditions Chart.

For best results, lubricate the bearing while the fan is in operation. Pump grease in slowly until a slight bead forms around the bearing seals. Excessive grease can burst seals thus reducing bearing life.

Lubrication Conditions Chart

Fan Class Fan Status Shaft Size

Normal Conditions

(Clean, Dry & Smooth)

QMX

QMX-HP

Extreme Conditions

(Dirty/Wet/Rough)

Normal Conditions

(Clean, Dry & Smooth)

Extreme Conditions

(Dirty/Wet/Rough)

> 1-1/2” 7,500 < 1-1/2” 2,000 > 1-1/2” 1,500 < 1-1/2” 400

> 2” 5,000 < 2” 1,000 > 2” 1,000 < 2” 200

Maximum Interval (opera-

tional hrs)

In the event the bearing cannot be seen, use no more than three injections with a hand-operated grease gun.

Before lubricating, the grease nipple and immediate vicinity should be thoroughly cleaned without the use of high pressure equipment. The grease should be supplied slowly as the bearing rotates until fresh grease slips past the seal. Excessive pressure should be avoided to prevent seal damage.

Exceptions to the greasing interval chart:

• Periodic Applications (any break of one week or

more): it is recommended that full lubrication be performed

prior to each break in operation.

• Higher Temperature: it is recommended to halve the intervals for every 30F increase in operating temperature above 120F not to exceed 230F for standard bearings; High Temperature bearings (optional) can operate up to 400F.

• Vertical Shaft: it is recommended that the intervals

should be halved.

Loren Cook Company uses petroleum lubricant in a lithium base. Other types of grease should not be used unless the bearings and lines have been flushed clean. If another type of grease is used, it should be a lithium-based grease conforming to NLGI grade 2 consistency.

A NLGI grade 2 grease is a light viscosity, low-torque, rust-inhibiting lubricant that is water resistant. Its temperature range is from -30F to +200F and capable of intermittent highs of +250F.

Lubrication - Motor Bearings

Motors are provided with prelubricated bearings. Any lubrication instructions shown on the motor nameplate supersede instructions below.

Motor bearings without provisions for relubrication will operate up to 10 years under normal conditions with no maintenance. In severe applications, high temperatures or excessive contaminates, it is advisable to have the maintenance department disassemble and lubricate the bearings after 3 years of operation to prevent interruption of service.

For motors with provisions for relubrication, follow intervals of the table below.

Relubrication Intervals

NEMA Frame Size

Service

Conditions

Standard 3 yrs. 6 months 2 yrs. 6 months 1 yr. 3 months

Severe 1 yr. 3 months 1 yr. 3 months 6 months 1 months

Up to and

including 184T

1800 RPM

and less

Over 1800

RPM

213T-365T 404T and larger

1800 RPM

and less

Over 1800

RPM

1800 RPM

and less

Over 1800

RPM

Motors are provided with a polyurea mineral oil NGLI #2 grease. All additions to the motor bearings are to be with a compatible grease such as Exxon Mobil Polyrex EM and Chevron SRI.

The above intervals should be reduced to half for vertical shaft installations.

Motor Services

Should the motor prove defective within a one-year period, contact your local Loren Cook representative or your nearest authorized electric motor service representative.

Page 8

Changing Shaft Speed

All belt driven fans with motors up to and including 5 HP are equipped with variable pitch pulleys. To change the fan speed, perform the following:

a. Loosen setscrew on driver (motor) pulley and remove

key, if equipped.

If the pulley has multiple grooves, all must be adjusted

to the same width.

c. After adjustment, inspect for proper belt tension.

Speed Reduction

Open the pulley in order that the belt rides deeper in

the groove (smaller pitch diameter).

Speed Increase

Close the pulley in order that the belt rides higher in the groove (larger pitch diameter). Ensure that the speed limits of the fan and the horsepower limits of the motor are maintained.

Max Catalog RPM

Pulley and Belt Replacement

a. Loosen and remove belts

by adjusting motor mounting plate.

b. Remove pulleys from

their respective shafts.

c. Clean the motor and fan

shafts.

d. Clean bores of pulleys

and coat the bores with heavy oil.

e. Remove grease, rust, or

burrs from the pulleys and shafts.

Fan Size

120 3707 4490 135 3295 3991 150 2907 3510 165 2633 3191 180 2423 2925 202 2152 2600 225 1937 2340 245 1780 2149 270 1623 1866 300 1465 1679 330 1332 1527 365 1207 1381 402 1081 1252 445 988 1132 490 897 1028 540 813 933 600 732 -

QMX QMX-HP

90 4943 5987

f. Remove burrs from shaft by sanding. g. Place fan pulley on fan shaft and motor pulley on its

shaft. Damage to the pulleys can occur when excessive force is used in placing the pulleys on their

respective shafts. h. Tighten in place. i. Install belts on pulleys and align as described in the

Belt and Pulley Installation section.

Bearing Replacement

The fan bearings are pillow block ball bearings.

a. Loosen and remove belts by adjusting motor mounting

plate b. Remove the bearing cover by removing the bolts

around the perimeter of the bearing cover. Do not

remove fan sheave yet. c. Remove inlet cone by removing attaching bolts/nuts

around perimeter of the inlet plate. d. Remove wheel by loosening setscrews and sliding off

shaft. e. Record the location of the fan sheave from end of

shaft, and remove the sheave. f. Record the distance from the bearing to the end of the

shaft. g. Loosen setscrews on bearings and remove shaft. j. Remove bearings from bearing base and replace with

new ones, noting the exact location of each; do not

fully tighten base bolts.

k. Slide shaft through bearings until shaft protrudes the

same amount as measured above. Tapping the inner race of each bearing with a soft driver may be required. Do not hammer the end of the shaft or the

bearing housing.

l. Return setscrews to same location as marked above

and tighten one setscrew on each bearing to half its specified torque.

m. Rotate the shaft to allow the bearings to align them

selves. n. Replace wheel but do not tighten yet. o. Replace inlet cone. Wheel may need to be moved to

allow proper alignment. Care should be taken to

insure that inlet cone is centered inside wheel before

and after tightening attaching bolts. p. Slide wheel on shaft to achieve proper wheel/inlet

overlap and tighten wheel set screws. Refer to

Wheel-to-Inlet Clearance on page 3. q. Tighten hold-down bolts to proper torque. r. Turn the shaft by hand. resistance should be the

same as it was before hold-down bolts were fully tight-

ened. s. Tighten all bearing setscrews to full specified torque. t. Replace the sheave, align with motor sheave, and

adjust the belt tension. u. Test run fan and retighten all setscrews and bolts, and

trim balance as necessary (.0785 in/sec max). v. Replace discharge cover.

Wheel Replacement

The wheel has a pre-machined shoulder in the hub for

the use of most 2 and 3 jaw mechanical puller.

a. Align center of the puller with the center of the shaft. b. Ensure all setscrews in the hub, normally two, are

fully removed.

c. Slowly remove wheel from the shaft.

SEE DETAIL A

PRE-MACHINED SHOULDER

DETAIL A

Page 9

Troubleshooting

Problem and Potential Cause

Low Capacity or Pressure

•Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

•Poor fan inlet or outlet conditions. There should be a straight clear duct at the inlet or outlet.

•Improper wheel alignment.

Excessive Vibration and Noise

•Damaged wheel.

•Belts misaligned.

•Belts too loose; worn or oily belts.

•Loose fasteners.

•Speed too high.

•Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

•Bearing set screws loose.

•Bearings need lubrication or replacement.

•Debris in impeller.

•Fan surge.

•See page 4 for issues regarding use of VFD.

Overheated Motor

•Motor improperly wired.

•Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

•Cooling air diverted or blocked.

•Improper inlet clearance.

•Incorrect fan speed.

•Incorrect voltage.

Overheated Bearings

•Improper bearing lubrication

•Excessive belt tension.

Page 10

QMX/QMXD-HP/QMX-HP Parts List

Horizontal Mount

Direct Drive

ITEM

NUMBER

1 Companion Flange (Optional) 16 Bearing Cover 2 External Inlet Vane Damper (Optional) 17 Bearings (Two Required) 3 Inlet Spiral Guard or Safety Screen (Optional) 18 Isolator (Four Required Optional) 4 Inlet Cone 19 Isolation Rails - Horizontal Mount (Optional) 5 Mix-Flow Wheel 20 Base - Horizontal Mount (QMX) 6 Shaft 21 Thrust Restraint - Horizontal Mount (Optional) 7 Access Door (Optional) 22 Isolation Structure - Vertical Mount (Optional) 8 Motor Cover (Optional) 23 Housing - Vertical Mount (QMX)

9 Housing-Horizontal Mount (QMX) 24 Shaft Locking Collar - Vertical Mount 10 Motor 25 Housing - Direct Drive 11 Motor Plate (QMX) 26 Base - Direct Drive 12 Belt Guard 27 Motor Plate - Direct Drive 13 Belt Set 28 Motor Cover - Direct Drive 14 Drive Pulley 29 Mix-Flow Wheel - Direct Drive 15 Discharge Safety Screen (Optional) 30 Horizontal Split Housing (Optional)

DESCRIPTION

ITEM

NUMBER

ITEM

DESCRIPTION

Vertical Mount

Page 11

QMXE/QMXE-HP Parts List

QMXS/QMXS-HP Parts List

ITEM

NUMBER

1 QMX Curb Cap

2 QMXE Birdscreen

3 QMXE Top Cap Post

4 QMXE Baffle Brace

5 QMXE Top Cap Extension (for Size 90 only)

6 QMXE Top Cap

See common parts (not shown) listed on page 9.

ITEM

DESCRIPTION

ITEM

NUMBER

1 QMX Curb Cap

2 QMXS Top Cap-Open

3 QMXS Upper Baffle Brace

4 QMXS Top Cap Post

5 QMXS Birdscreen

6 QMXS Top Cap

7 QMXS Lower Top Cap Post

8 QMXS Lower Baffle Brace

9 QMXS Adapter Plate

See common parts (not shown) listed on page 9.

ITEM

DESCRIPTION

Page 12

QMXU/QMXU-HP Parts List

ITEM

NUMBER

ITEM

DESCRIPTION

1 QMX Curb Cap

2 QMXU Lifting Lug

3 QMXU Damper

4 QMXU Damper Stop

5 QMXU Windband

6 QMXU Discharge Guard (Optional)

See common parts (not shown) listed on page 9.

QMXLE/QMXLE-HP Parts List

ITEM

NUMBER

ITEM

DESCRIPTION

1 QMXLE Mixing Box

2 QMXLE Curb Cap

3 QMXLE Middle Section

4 QMXLE Adapter Plate

5 QMXLE Stack Damper

6 QMXLE Windband

7 QMXLE Lifting Lug

See common parts (not shown) listed on page 9.

Page 13

Arrangement 3 Parts List

ITEM

NUMBER

1 Arr. 3 Bearing Support

2 Arr. 3 Shaft

3 Arr. 3 Spiral Guard

4 Arr. 3 Base

5 Arr. 3 Housing

6 Arr. 3 Motor Cover

See common parts (not shown) listed on page 9.

Limited Warranty

Loren Cook Company warrants that your Loren Cook fan was manufactured free of defects in materials and workmanship, to the extent stated herein. For a period of one (1) year after date of shipment, we will replace any parts found to be defective without charge, except for shipping costs which will be paid by you.

This warranty is granted only to the original purchaser placing the fan in service.

This warranty is void if the fan or any part thereof has been altered or modified from its original design or has been abused, misused, damaged or is in worn condition or if the fan has been used other than for the uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear.

To make a warranty claim, notify Loren Cook Company, General Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining in writing, in detail, your complaint and referring to the specific model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notified, within thirty (30) days of our receipt of your complaint, in writing, as to the manner in which your claim will be handled. If you are entitled to warranty relief, a warranty adjustment will be completed within sixty (60) business days of the receipt of your written complaint by Loren Cook Company.

This warranty gives only the original purchaser placing the fan in service specifically the right. You may have other legal rights which vary from state to state.

For fans provided with motors, the motor manufacturer warrants motors for a designated period stated in the manufacturer’s warranty. Warranty periods vary from manufacturer to manufacturer. Should motors furnished by Loren Cook Company prove defective during the designated period, they should be returned to the nearest authorized motor service station. Loren Cook Company will not be responsible for any removal or installation costs.

ITEM

DESCRIPTION

Corporate Offices: 2015 E. Dale Street Springfield, MO 65803 417.869.6474

lorencook.com

QMX IOM - Oct 2012

Page 14

AC / VCR

Centrifugal Roof & Wall exhausters

Installation, Operation, and Maintenance Manual

This publication contains the installation, operation and maintenance procedures for standard units of the AC & VCR: Centrifugal Roof and Wall Exhausters.

Carefully read this publication and any supplemental documents prior to any installation or maintenance procedure.

Loren Cook Company’s AC catalog & VCR catalog provide additional information describing the equipment,

fan performance, available accessories and specication

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.

Rotating Parts & Electrical Shock Hazard:

Fans should be installed and serviced by qualied personnel

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 off, in case of an emergency and in order that maintenance personnel are provided 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 windmilling. 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 contact with personnel, tools or clothing.

Failure to follow these instructions could result in death or serious injury.

Receiving and Inspection

Carefully inspect the fan and accessories for any

damage and shortage immediately upon receipt of fan.

• Turn the wheel by hand to ensure it turns freely and does not bind.

• Inspect dampers (if included) for free operation of all moving parts.

• Record on the Delivery Receipt any visible sign of damage.

Handling

Lift the fan by the 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

Code Requirements & 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 ofcial 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 specic to the installation.

Failure to follow these instructions could result in death or serious injury.

ACE

Lifting lugs

ACW

ACRU, ACSC & VCR

AC/VCR IO&M B51003-001

Page 15

If the fan was delivered with the motor unmounted, see

Conduit for

Control)

the maintenance sections for belt and pulley installation.

Downblast

Wall Exhausters

If the fan is a wall mount unit and a grease terminator or grease trough was not purchased, a 1-1/16 inch diameter drain hole should be inserted on the bottom side of the unit for drainage.

If your fan is a wall exhauster with a round base, a mounting template is shipped with the fan. Use the template to locate the necessary lag screws or anchor bolts on the wall. The fan can then be lifted and attached easily. Secure with lag screws, anchor bolts, or other suitable fasteners.

Topcap

Wires

Motor

WheelBaffle

VCR Installation

A. Ensure the fan discharge is a minimum 40 inches above the roof the roof surface and a minimum of 10 foot from any building air intake in order to comply with NFPA

96.

B. Minimum exhaust velocity in the duct should be 1500 FPM in accordance with NFPA 96.

C. If the fan is installed on a surface that is not level, install the fan in a position that places the drain tube at the lowest position.

D. Secure the fan to the roof curb at all four corners using a minimum of four anchor bolts, lag screws or other suitable fastener.

Inlet

Upblast

Topcap

Wires

Vent Tube

Conduit

junction

(used for grease)

Damper Installation

If your fan is supplied with dampers, follow the directions below.

• Place the damper inside the curb or inside the duct

Baffle

work. Ensure the damper will open freely for the correct

direction of the airow.

• Secure to curb at the damper shelf.

• Drill hole in the curb shelf for conduit needed for motor

wiring.

• Operate the dampers manually to ensure the blades

move freely.

• Install fan over curb while aligning the conduit location

with the conduit hole in the curb.

compartment of the unit for ACE, ACRU and ACW units. The motor’s wiring box may be on the side of the motor, the shaft end of the motor or the opposite shaft end of the

motor. If an additional eld wiring compartment is added,

Smoke control

Use of any backdraf t dampers is not permitted. Fire dampers and/or smoke dampers may be required in a smoke control system. These dampers must meet the requirements determined by the local code authority.

then an approved metal box with cover must be secured to the unit with two screws in order that the box does not rotate. All wiring must be protected from abrasion where they enter and exit. The ground wire must be secured

under the green ground screw within the eld wiring

compartment. See motor wiring diagram, NEC and local

Wiring

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.

ACRU Upblast units have two wiring conduits. The horizontal conduit is directly above the vertical conduit.

code for additional details.

For VCR and ACSC units a separate NEMA 3 eld

wiring compartment is provided on the exterior of the unit.

For further information refer to the National Electrical Code and the wiring diagram provided on the motor.

ACE downblast units have a single vertical conduit.

The motor’s wiring box is the approved eld wiring

AC/VCR IO&M B51003-001

Motor

Wheel

Inlet

Conduit

junction

(used for Smoke

Page 16

NOTICE! Follow the wiring diagram in the

T-

Ground B

Ground A

Line

Ground A

Ground B

T-

Line

Ground B

J-10

Ground A

Line

oltage

3 Phase, 9 Lead Motor Y-

208/230 V

oltage

3 Phase, 9 Lead Motor

Motor

Black (High)

White Line

Black Line

disconnect switch and the wiring diagram provided with the motor. Correctly label the circuit on the main power box and always identify a closed switch to promote safety (i.e., red tape over a closed switch).

1. Remove the top cap which covers the motor assembly by unlatching the snap clips.

2. For internal wiring, run the electrical wire and conduit through the opening drilled in the damper shelf (refer to Damper Installation), then through the wiring conduit in the ventilator base to the motor compartment. For external wiring, run the wires through the horizontal conduit on upblast units, or under top cap in downblast units.

3. Pull the wires through and complete the wiring.

Use the following diagrams to wire the motor except

for EC and EC/PM wiring diagrams, see additional supplement.

Single Speed, Single Phase Motor

When ground is required, attach

to ground A or B with no. 6

thread forming screw. To reverse, interchange T-1 and T-4.

2 Speed, 2 Winding, 3 Phase

To reverse: High Speed-interchange leads T11 and T12.

Low Speed-interchange leads T1 and T2. Both Speedsinterchange any 2 line leads.

Second

Damper

L2 L1

Transformer*

Typical Damper Motor Schematic

Fan

Motor

ansformer**

Damper

Motor*

For 3 phase, damper motor voltage should be the same between L1 and L2. For single phase application, disregard L3. *Damper motors may be available in 115, 230 and 460 volt

models. The damper motor nameplate voltage should be veried

prior to connection. ** A transformer may be provided in some

installations to correct the damper motor voltage to the specied

voltage. +Damper not available with ACSC.

Shade Pole or PSC Motors

2 Speed, 2 Winding, Single Phase Motor

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-1 and T- 4 leads.

High Speed

Low Speed

Single Speed, Single Phase, Dual Voltage

789

456

Line

T-5

J-10

Ground B

Connection

Low Voltage

208/230 Volts

728

L2L

3 9

T-5

Link A

Link B

Low Voltage

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-5 and J-10 leads.

Delta-Connection

Low Voltage

olts

7 6

To reverse, interchange any 2 line leads.

AC/VCR IO&M B51003-001

High V

460 Volts

2-Speed PSC Motors

Line

Red (Low)

* Cap or insulate unused lead

FSC - 115 VOLT 10 AMP

Link A & B

FAN*

FSC

WHITE

BLACK

FSC - 240 VOLT 5 AMP

High V

460 Volts

456

789

L2L

FAN*

* See wiring diagram for motor wiring.

Locate away from heat.

Page 17

Electrical Shock & Fire Hazard:

Insulate Unused Leads Separately.

Failure to follow these instructions could result in death or serious injury.

wheel/inlet drawing for correct overlap.

Adjust the overlap by loosening the wheel hub and moving the wheel along the shaft to obtain the correct value.

A uniform radial gap (space between the edge of the cone and the edge of the inlet) is obtained by loosening the upper or lower bearing.

Grease Terminator

PVC Extension

Fan Inlet Side Sealing Nut

Lid

Sealing Nut

Te r minator

Final Installation Steps

1. Ensure fasteners and set screws, particularly fan mounting and bearing fasteners are tightened according to the recommended torque(inch-lbs) shown

on the table below.

Setscrews

Size

No. 10 3/32” 28 33 3/8 ”-16 260

1/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 120 0

3/8” 3/16” 250 290 3/4”-10 2040

7/16 ” 7/3 2” 355 405 7/8” -9 2100

1/2” 1/4” 560 640 1”-8 3000 5/8” 5/16” 114 0 1300 1-1/8 ”-7 4200 3/4” 3/8” 1680 19 20 1-1/4”-7 6000

Key Hex

Across

Flats

Recommended

Torque Inch-lbs.

Min. Max. Size

Hold Down Bolts

Wrench

Tor q u e

2. Inspect for correct amperage with an ammeter and correct voltage with a voltmeter.

3. Ensure that all accessories are installed.

4. Test the fan to be sure the rotation is the same as indicated by the arrow marked ‘Rotation’.

NOTICE! Do not allow the fan to run in the wrong direction. This will overheat the motor and cause serious damage. For 3-phase motors, if the fan is running in the wrong direction, check the control switch. It is possible to interchange two leads at this location so that the fan is operating in the correct direction.

5. Inspect wheel-to-inlet clearance. Wheels may shift in shipment. To realign wheel-to-inlet, shift upper bearing so there is an equal radial clearance between the

wheel and inlet.

Wheel-to-Inlet Clearance

The correct wheel-to-inlet clearance is critical to

proper fan performance. This clearance should be

veried before initial start-up since rough handling during

shipment could cause a shift in fan components. Refer to

Size Overlap

60 - 165 3/16” 180 - 245 1/4” 270 - 300 5/16 ” 330 - 365 3/8”

402 7/16 ”

445 - 490 1/2”

540 13/16

Operation

Pre-Start Checks

1. Lock out all the primary and secondary power sources.

2. Inspect and tighten fasteners and setscrews, particularly fan mounting and bearing fasteners Refer to Torque chart.

3. Inspect belt tension and pulley alignment. Refer to Belt and Pulley Installation.

4. Inspect motor wiring. Refer to Wiring Installation.

5. Ensure belt touches only the pulleys.

6. Rotate the wheel to ensure it rotates freely.

7. Ensure fan and ductwork are clean and free of debris.

8. Close and secure all access doors.

9. Restore power to fan.

Start Up

Turn on the fan. (In variable speed units, set the fan to

its lowest speed.) Inspect for the following:

• Direction of rotation

• Excessive vibration

• Unusual noise

• Bearing noise

• Improper belt alignment or tension (listen for squealing)

• Improper motor amperage or voltage

If a problem is discovered, immediately shut the fan off. Lock out all electrical power and check for the cause of the trouble. Refer to the Troubleshooting section.

Inspection

Inspection of the fan should be conducted at the rst

30 minute, 8 hour and 24 hour intervals of satisfactory operation. During the inspections, stop the fan and inspect as instructed.

30 Minute Interval

Inspect bolts, setscrews, and motor mounting bolts.

Adjust and tighten as necessary.

AC/VCR IO&M B51003-001

Page 18

8 Hour Interval

Inspect belt alignment and tension. Adjust and tighten

as necessary.

24 Hour Interval

Inspect belt tension. Adjust and tighten as necessary

Year-round Inspection

Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and location of the fan. Regular inspections may be required per local codes. Contact the local code authority for inspection requirements.

All Units

It is recommended the following inspections be conducted twice per year.

• Inspect bolts and setscrews for tightness. Tighten as

necessary. Refer to Torque chart.

• Inspect belt wear and alignment. Replace worn belts

with new belts and adjust alignment as needed. Refer

to Belt and Pulley Installation, page 3.

• Bearings should be inspected as recommended in the

Conditions Chart.

• Inspect for cleanliness. Clean exterior surfaces only.

Removing dust and grease on motor housing assures

proper motor cooling.

Units exhausting corrosive or contaminated air

• Inspect fans exhausting corrosive or contaminated air

within the rst month of operation. Fans exhausting

contaminated air should be inspected every three

months.

NOTICE! ACSC fan is intended for general ventilation, and is UL listed for Smoke Control Systems. The fan should not be used to exhaust corrosive or contaminated air.

VCR & ACRU

• Regular inspections of the Grease Terminator 2 are

recommended. Depending on the amount of grease

discharged through the fan, the Grease Terminator

2 should be changed every 30 to 45 days to ensure

proper operation. Any buildup of grease is easily

seen during a visual inspection of the clear canister.

However, if the Grease Terminator 2 becomes

saturated, grease will no longer be absorbed.

Maintenance

Fan Bearings

NOTICE! The fan bearings are provided prelubricated. Any specialized lubrication instructions on fan labels supersedes information provided herein. Bearing grease is a petroleum lubricant in a lithium base conforming to a NLGI #2 consistency. If user desires to utilize another type of lubricant, they take

responsibility for ushing bearings and lines, and

maintaining a lubricant that is compatible with the installation.

A NLGI #2 grease is a light viscosity, low-torque, rustinhibiting lubricant that is water resistant. Its temperature range is from -30°F to 200°F and capable of intermittent highs of 250°F.

Relubrication Intervals

RPM Te m p °F Greasing Interval

Up to 1000

1000 to 3000

Over 3000

Any Speed < -30 Consult Factory Any Speed > 200 1 week

For moist or otherwise contaminated installations; divide the interval by a factor of 3. For vertical shaft installations divide the interval by a factor of 2.

-30 to 120 6 months

120 to 200 2 months

-30 to 120 3 months

120 to 200 1 month

-30 to 120 1 month

120 to 200 2 weeks

For best results, lubricate the bearing while the fan is in operation. Pump grease in slowly until a slight bead forms around the bearing seals. Excessive grease can damage seal and reduce life through excess contamination and/or loss of lubricant.

In the event that the bearing cannot be seen, use no more than three injections with a hand operated grease gun.

Motor Bearings

Motors are provided with prelubricated bearings. Any lubrication instructions shown on the motor nameplate supersede instructions below.

Motor bearings without provisions for relubrication should operate up to 10 years under normal conditions with no maintenance. In severe applications, high temperatures or excessive contaminates, it is advisable to have the maintenance department disassemble and lubricate the bearings after 3 years of operation to prevent interruption of service. For motors with provisions for relubrication, follow intervals of the table.

NOTICE! Motors are provided with a polyurea mineral oil NGLI #2 grease. All additions to the motor bearings are to be with a compatible grease such as Exxon Mobil Polyrex EM and Chevron SRI. To inspect, clean or repair refer to the diagram below and follow these steps:

NEMA Frame Size

Service

Conditions

Standard 3 yrs

Severe 1 yr

1800 RPM

Up to &

including 184T

Over 1800

and

less

RPM

months

213T - 365T 404T and larger

1800 RPM

and less

2 yrs

1 yr

Over 1800 RPM

months

months6 months1 month

1800

RPM and

less

1 yr

months

Over 1800 RPM

The above intervals should be reduced to half for vertical shaft installations.

Motor Services

Should the motor prove defective within a one-year period, contact your local Loren Cook representative or your nearest authorized electric motor service representative.

AC/VCR IO&M B51003-001

Page 19

Changing Shaft Speed

1/4 inch

OFFSET ANGULAR OFFSET/ANGULAR

Belt driven ventilators (5HP or less) are equipped with variable pitch pulleys. To change fan speed, perform the following

1. Remove belt. (See pulleys / belts for details)

2. Loosen setscrew on driver (motor) pulley and remove

key, if equipped.

3. Turn the pulley rim to open or close the groove facing. If

the pulley has multiple grooves, all must be adjusted to

the same width.

4. After adjustment, reinstall belt and inspect for proper

belt tension.

Maximum RPM

Size

60 1981 - - - - - 70 1941 - - - - - 80 1806 - - - - - -

100 2013 - 2002 - - - -

120 1669 - 1671 - - - 135 1574 - 1574 - - - -

150 1519 - 1520 - 1952 - 165 1296 - 1295 - 17 28 - 2508 180 1513 - 1546 - 1829 - 2396 195 13 48 - 135 3 - 1570 - 2100

210 119 0 - 1205 - 1626 - 2126 225 1043 - 1086 - 1435 - 1879 245 885 - 901 - 1185 123 4 1616

270 752 - 766 - 1025 1049 1656 300 837 861 837 877 980 104 6 1391 330 716 734 716 748 830 912 11 8 2 365 624 648 624 659 735 872 1132 402 539 550 539 560 - - 445 463 465 463 473 - - 490 360 396 360 403 - - 540 347 401 - - - - -

ACE

Standard Reinforced Standard Reinforced Standard Reinforced Standard

Speed Reduction:

Open the pulley in order that the belt rides deeper in

the groove (smaller pitch diameter).

Speed Increase:

Close the pulley in order that the belt rides higher in the groove (larger pitch diameter). Ensure that the RPM limits of the fan and the horsepower limits of the motor are maintained.

Replace Pulleys / Belts

1. Clean the motor and fan shafts.

2. Loosen the motor plate mounting bolts to relieve the

belt tension. Remove the belt.

3. Loosen the pulley setscrews and remove the pulleys

from the shaft. If excessive force is required to remove

the pulleys, a three-jaw puller can be used. This tool,

however, can easily warp a pulley. If the puller is used,

inspect the trueness of the pulley after it is removed

from the shaft. The pulley will need replacement if it is

more than 0.020 inch out of true.

4. Clean the bores of the pulleys and place a light coat of

oil on the bores.

5. Remove any grease, rust or burrs from pulleys.

6. Place the fan pulley on the fan shaft and the motor

ACRU, ACSC, ACW & VCR

Standard HP XP

pulley on the motor shaft. Damage to the pulleys can occur when excessive force is used in placing the pulleys on their respective shafts.

7. After the pulleys have been correctly placed back onto their shafts, tighten the pulley setscrews.

Belt tension

Belt tension is determined by the sound of the belts

when the fan is rst started. The belts will produce a

loud squeal, which dissipates after the fan is operating at full capacity. If belt tension is too tight or too loose, lost

efciency and damage may occur.

Do not change the pulley pitch diameter to change

tension. The change will result in a different fan speed.

Figure 1

1 foot

1. Loosen motor plate adjustment bolts and slide motor plate so that belts easily slip into the grooves on the pulleys. Never pry, roll, or force the belts over the rim of the pulley.

2. Slide motor plate until proper tension is reached. For

proper tension, a deection of approximately 1/4” per foot of center distance should be obtained by rmly

pressing the belt. Refer to Figure 1.

3. Lock the motor plate adjustment bolts in place.

4. Ensure pulleys are properly aligned. Refer to gure 2.

Figure 2

CENTER

DISTANCE

(CD)

Center Distance Maximum Gap

Up thru 12” 1/16”

12 through 48” 1/8”

Over 48” 1/4”

GAP

Belt Alignment

Pulley alignment is adjusted by loosening the motor

pulley setscrew and by moving the motor pulley on the

AC/VCR IO&M B51003-001

Page 20

motor shaft. Figure 2 indicates where

Drilled hole placement. Wheel puller.

to measure the allowable gap for the drive alignment tolerance. All contact points (indicated by WXYZ) are to have a gap less than the tolerance shown in the table. When the pulleys are not the same width, the allowable gap must be adjusted by half of the difference in width. Figure 3 illustrates using a carpenter’s square to adjust the position of the motor pulley until the belt is parallel to the longer leg of the square.

Figure 3

Bearing Replacement

The fan bearings are pillow block type ball bearings.

1. Remove the old bearing.

2. Remove any burrs from the shaft by sanding.

3. Slide new bearings onto the shaft to the desired location and loosely mount bearings onto the bearing support. Bearing bolts and setscrews should be loose enough to allow shaft positioning.

4. Correctly position the wheel and tighten the bearing bolts securely to the bearing support.

5. Align setscrews bearing to bearing and secure tightly to the shaft. NOTICE! Never tighten both pairs of setscrews before securing bearing mounting bolts. This may damage the shaft.

6. Inspect the wheel position again. If necessary, readjust by loosening the bearing bolts and setscrews and repeat from step 3.

Wheel Replacement

1. Drill two holes approximately centered between the shaft and the edge of the hub outer dimension with the following dimensions:

• 1/4” diameter

• 3/8” to 1/2” deep

• 180° apart in face of hub

2. Tap 1/4” holes to 5/16” thread with the 5/16” hole tap. Do not drill or tap any larger than recommended.

3. Screw the puller arms into the tapped holes full depth of threads (3/8” to 1/2” approximately). Align center of puller with center of shaft. Make certain all setscrews in hub (normally a quantity of two) are fully removed. Work puller slowly to back wheel off the shaft.

Troubleshooting

Review the following problems and causes

Low Capacity or Pressure

• Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

• Poor fan inlet conditions. There should be a straight clear duct at the inlet.

• Improper wheel alignment.

Excessive Vibration and Noise

• Damaged or unbalanced wheel.

• Belts too loose; worn or oily belts.

• Speed too high.

• Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

• Bearings need lubrication or replacement.

• Fan surge.

Overheated Motor

• Motor improperly wired.

• Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

• Cooling air diverted or blocked.

• Improper inlet clearance.

• Incorrect fan RPMs.

• Incorrect voltage.

Overheated Bearings

• Improper bearing lubrication

• Excessive belt tension.

Recommended Puller: Lisle No. 45000 Sterling Wheel Puller. This puller is available at most automotive parts retail outlets.

AC/VCR IO&M B51003-001

Page 21

ACE-D Parts

ACE-D 70-100

Item

1a 1b Top Cap Cylinder Top Cap Cylinder

2 Bolts (4) Top Cap Clip (4) Top Cap Clip (4) 3 Motor Motor Motor 4 Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe 6 Wheel Assembly Wheel Assembly Wheel Assembly 7 Bird Screen Bird Screen Bird Screen 8 Base Base Base 9 Conduit Conduit Conduit

10 Spacer (4) Spacer (4) Spacer (8)

11 Post (4) Upper Post (4) Upper Post (8) 12 - Lower Post (4) Lower Post (8) 13 - - Power Assembly

70-10 0 101-180 150 -30 0

Top Cap

ACE-D Description

Top cap Lid Top cap Lid

ACE-B Parts

ACE-D 101-180

Item

60-100 120-24 5 270-300 330-540

1a Top Cap Lid Top Cap Lid Top Cap Lid Top Cap Lid

Top Cap

Cylinder

Top Cap Clip

3 Motor Motor Motor Motor 4 - Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe Bafe

7 Bird Screen Bird Screen Bird Screen Bird Screen

8 Base Base Base Base

9 Conduit Conduit Conduit Conduit 10 Spacer (4) Space r (4) Space r (4) Sp ac er (4) 11 Upper Post (4) Upper Post (4) Upper Post (8) Upper Post (8) 12 Lower Post (4) Lower Post (4) Lower Post (8) Lower Post (8) 13 - - - Brace (8)

15 Shaft Shaft Shaft Shaft 16 Bearing Bearing Bearing Bearing 17 Drive Sheave Drive Sheave Drive Sheave Drive Sheave 18 Driven Sheave Driven Sheave Driven Sheave Driven Sheave 19 Belt Set Belt Set Belt Set Belt Set

(4)

Wheel

Assembly

Power

Assembly

ACE-B

ACE-B Par ts Description

Top Cap Cylinder

Top Cap Clip

(4)

Wheel

Assembly

Power

Assembly

Top Cap Clip

Top Cap

Cylinder

(8)

Wheel

Assembly

Power

Assembly

Top Cap Cylinder

Top Cap Clip

(8)

Wheel

Assembly

Power

Assembly

ACE-D 195-300

AC/VCR IO&M B51003-001

Page 22

ACW-D Parts

Item

1a 1b Top Cap Cylinder Top Cap Cylinder

10 - Spacer (4) Spac er (8)

11 - Brace (4)

12 Grommet (2) Grommet (2) Grommet (2) 13 Cooling Tube-Angled Cooling Tube Cooling Tube 14 - - Power Assembly

15 Post (4) Post (4)

70-10 0 101-195 150 -245

Top Cap

ACW-D Description

Top cap Lid Top cap Lid

Br ace (4) (15 0 -19 5) Brace (8)(210-245)

Post (4) 150-195 Post (8) 210-245

ACW-D 70-100

ACW-D 101-195

C-Face Mount

ACW-D 150-245

AC/VCR IO&M B51003-001

Base Mount

ACW-B Parts

Item

1a Top Cap Lid Top Cap Lid Top Cap Lid

2 Top Cap Clip (4) Top Cap Clip (4) Top Cap Clip (8) 3 Motor Motor Motor 4 Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe

7 Bird Screen Bird Screen Bird Screen 8 Wall Flange Wall Flange Wall Flange

9 Spacer (4) Space r (4) Space r (8) 10 Post (4) Post (4) Post (8) 11 Wind Band Wind Band Wind Band 12 - B race (4) Brace (8) 13 Power Assembly Power Assembly Power Assembly 14 Shaft Shaft Shaft 15 Bearing (2) Bearing (2) Bearing (2) 16 Drive Sheave Drive Sheave Drive Sheave 17 Driven Sheave Driven Sheave Driven Sheave 18 Belt Set Belt Set Belt Set 19 Ve n t Tube Ve nt Tu b e Ven t Tube 20 Grommet (2) Grommet (2) Grommet (2)

Top Cap Cylinder

Assembly

ACW-B Par ts Description

100 120-165 180-24 5

Wheel

Top Cap Cylinder

Wheel

Assembly

192012

Top Cap Cylinder

Wheel

Assembly

Page 23

ACRU-D Parts

ACRU-D Sizes 70-100

Item

1a Top Cap Top Cap Lid Top Cap Lid

1b -

2 Bolts (4) Top Cap Clip (4) Top Cap Clip (8) 3 Motor Motor Motor 4 Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe

Assembly 7 Bird Screen Bird Screen Bird Screen 8 Base Base Base 9 Conduit Conduit Conduit

10 Isolator (4) Isolator (4) Isolator (8) 11 Post (4) Upper Post (4) Upper Post (8) 12 - Lower Post (4) Lower Post (8) 13 Wind Band Wind Band Wind Band 14 - Brace (4) Brace (8)

Vent Tu b e -

16 Grommet (2) Grommet (2) Grommet (2)

ACRU-D Parts Description

70-10 0 101-195 210 -300

Wheel

Angled

Top Cap Cylinder

Wheel

Assembly

Vent Tu b e -

Angled

Top Cap Cylinder

Wheel Assembly

Vent Tu b e -

Angled

ACRU-B Parts

8 6

ACRU-D Sizes 101-195

Item

1a Top Cap Lid Top Cap Lid Top Cap Lid 1b Top Cap Cylinder Top Cap Cylinder Top Cap Cylinder

2 Top Cap Clip (4) Top Cap Clip (4) Top Cap Clip (8) 3 Motor Motor Motor 4 Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe 6 Wheel Assembly Wheel Assembly Wheel Assembly 7 Bird Screen Bird Screen Bird Screen 8 Base Base Base 9 Conduit Conduit Conduit

10 Isolator (4) Isolator (4) Isolator (8) 11 Upper Post (4) Upper Post (4) Upper Post (8) 12 Lower Post (4) Lower Post (4) Lower Post (8) 13 Wind Band Wind Band Wind Band 14 - B ra ce (4) Brace (8) 15 Power Assembly Power Assembly Power Assembly 16 Shaft Shaft Shaft 17 Bearing (2) Bearing (2) Bearing (2) 18 Drive Sheave Drive Sheave Drive Sheave 19 Driven Sheave Driven Sheave Driven Sheave 20 Belt Set Belt Set Belt Set 21 Vent Tu b e Ve nt Tub e Ve n t Tube 22 Grommet (2) Grommet (2) Grommet (2)

ACRU-B Parts Description

100 120 -2 45 270-490

ACRU-D Sizes 210-300

AC/VCR IO&M B51003-001

Page 24

VCR-D Parts VCR-B Parts

VCR-D Sizes 70-195

VCR-D Sizes 210-300

Item

1a Top Cap Lid Top Cap Lid 1b Top Cap Cylinder Top Cap Cylinder

2 Top Cap Clip (4)

3 Motor Motor 4 Motor Plate Motor Plate 5 Bafe Bafe 6 Wheel Assembly Wheel Assembly 7 NEMA 3 Junction NEMA 3 Junction 8 Base Base 9 Conduit Conduit

10 Upper Post (4)

11 Lower Post (4) Lower Post (8) 12 Wind Band Wind Band 13 B race (4) Brace (8) 14 Ve n t Tube Vent Tu b e 15 Grommet (2) Grommet (2) 16 - Power Assembly 17 Cut Off * Cut Off *

*Cut off Plate is only on the VCR-HP and VCR-XP.

AC/VCR IO&M B51003-001

VCR-D Parts Description

101-195 210-300

Top Cap Clip (4) (210-245)

Top Cap Clip (8) (270-300)

Upper Post (4) (210-245)

Upper Post (8) (270-300)

VCR-B Sizes 100- 490

Item

1a Top Cap Lid Top Cap Lid Top Cap Lid 1b Top Cap Cylinder Top Cap Cylinder Top Cap Cylinder

2 Top Cap Clip (4) Top Cap Clip (4) Top Cap Clip (8) 3 Motor Motor Motor 4 Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe 6 Wheel Assembly Wheel Assembly Wheel Assembly 7 Base Base Base 8 Conduit Conduit Conduit

9 Isolator (4) Isolator (4) Isolator (4) 10 Upper Post (4) Upper Post (4) Upper Post (8) 11 Lower Post (4) Lower Post (4) Lower Post (8) 12 Wind Band Wind Band Wind Band 13 Br ac e (4) Brace (4) Brace (8) 14 Power Assembly Power Assembly Power Assembly 15 Shaft Shaft Shaft 16 Bearing (2) Bearing (2) Bearing (2) 17 Ve n t Tube Vent Tu be Vent Tu b e 18 Driven Sheave Driven Sheave Driven Sheave 19 Belt Set Belt Set Belt Set

20 Ven t Tube Vent Tu be Vent Tu b e

21 Grommet (2) Grommet (2) Grommet (2)

22 Cut Off* Cut Off* Cut Off* 23 Insulation Insulation Insulation

*Cut off Plate is only on the VCR-HP and VCR-XP.

100-225 245 270-490

NEMA 3 Junction

VCR-B Parts Description

NEMA 3 Junction

Box

NEMA 3 Junction

Box

Page 25

ACSC Parts

ACSC-D Sizes 100-490

Item

1a Top Cap Lid Top Cap Lid Top Cap Lid 1b Top Cap Cylinder Top Cap Cylinder Top Cap Cylinder

2 Top Cap Clip (4) Top Cap Clip (4) Top Cap Clip (8) 3 Motor Motor Motor 4 Motor Plate Motor Plate Motor Plate 5 Bafe Bafe Bafe 6 Wheel Assembly Wheel Assembly Wheel Assembly

7 Base Base Base 8 Conduit Conduit Conduit 9 Isolator (4) Isolator (4) Isolator (8)

10 Upper Post (4) Upper Post (4) Upper Post (8) 11 Lower Post (4) Lower Post (4) Lower Post (8) 12 Wind Band Wind Band Wind Band 13 Brace (4) Brac e (4) Brace (8) 14 Power Assembly Power Assembly Power Assembly 15 Shaft Shaft Shaft 16 Bearing (2) Bearing (2) Bearing (2) 17 Liquid Tite Conduit Liquid Tite Conduit Liquid Tite Conduit 18 Driven Sheave Driven Sheave Driven Sheave 19 Belt Set Belt Set Belt Set 20 Vent Tu b e Ven t Tube Vent Tu b e 21 Grommet (2) Grommet (2) Grommet (2) 22 Insulation Insulation Insulation

100-225 245 270- 490

NEMA 3 Junction

Box

ACSC-B Parts Description

NEMA 3 Junction

Box

NEMA 3 Junction Box

Limited Warranty

Loren Cook Company warrants that your Loren Cook fan was manufactured free of defects in materials and workmanship, to the extent stated herein. For a period of

one (1) year after date of shipment, we will replace any parts found to be defective without charge, except for shipping costs which will be paid by you.

This warranty is granted only to the original purchaser placing the fan in service.

This warranty is void if the fan or any par t thereof has been altered or modied from its original design or has been abused, misused, damaged or is in worn condition or

if the fan has been used other than for the uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear.

To make a warranty claim, notify Loren Cook Company, General Of ces, 2015 East Dale Street, Springeld, Missouri 65803- 4637, explaining in writing, in detail, your

complaint and referring to the spec ic model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notied, within

thirty (30) days of our receipt of your complaint, in writing, as to the manner in which your claim will be handled. If you are entitled to warrant y relief, a warranty adjustment will be completed within sixty (60) business days of the receipt of your writ ten complaint by Loren Cook Company.

This warranty gives only the original purchaser placing the fan in service specically the right. You may have other legal rights which var y from state to state.

For fans provided with motors, the motor manufacturer war rants motors for a designated period stated in the manufacturer’s warranty. Warranty periods var y from manufacturer to manufacturer. Should motors furnished by Loren Cook Company prove defective dur ing the designated period, they should be returned to the nearest authorized motor service station. Loren Cook Company will not be responsible for any removal or installation costs.

Corporate Ofces 2015 E. Dale Street Springeld, MO 65803

Phone 417-869-6474 Fax 417-862-3820 LorenCook.com

AC/VCR IO&M B51003-001

January 2016

Page 26

SQI

Square Centrifugal Inline Fan

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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 info@lorencook.com.

For information on special equipment, contact Loren Cook Company Customer Service Department at (417)869-6474.

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.

Grounding is required. All field-installed wiring must be completed by qualified personnel. All fieldinstalled 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.

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

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.

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.

SQI-B

Page 27

Motor Plate

Adjustment Nut

Tolerance

Center Distance

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

Maximum

Gap

OFFSET ANGULAR OFFSET/ANGULAR

Motor Plate Adjustment

Wiring Installation (continued)

Belt and Pulley Installation

1/4 inch

1 foot

Figure 2

X Y

CENTER

DISTANCE

(CD)

GAP

Final Installation Steps

a. Ensure that all accessories are

installed.

b. Ensure that the blower is secured to

ductwork.

c. Inspect wheel-to-inlet clearance. Ensure wheel does not rub against the inlet.

d. T est the fan to ensure the rotation of the wheel is the same as indicated by the rotation label.

e. Inspect for correct amperage with

Figure 3

an ammeter and correct voltage with a voltmeter.

Figure 1

Do not change the pulley pitch diameter to change ten-

sion. This will result in a different fan speed.

a. Loosen motor plate adjustment nuts on stud bolts and move motor plate in order that the belts can easily slip into the grooves on the pulleys. Never pry , roll, or force the belts over the rim of the pulley.

b. Adjust the motor plate until proper tension is reached. For proper tension, a deflection of approximately 1/4” per foot of center distance should be obtained by firmly pressing the belt. Refer to Figure1.

c. Lock the motor plate adjustment nuts in place.

d. Ensure pulleys are properly aligned. Refer to Figure 2.

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pulley setscrew and by moving the motor pulley on the motor shaft.

Figure 2 indicates where to measure the allowable gap for the drive alignment tolerance. All contact points (indicated by WXYZ) are to have a gap less than the tolerance shown in the table. When the pulleys are not the same width, the allowable gap must be adjusted by half of the difference in width. Figure 3 illustrates using a carpenter’s square to adjust the position of the motor pulley until the belt is parallel to the longer leg of the square.

Operation

Pre-Start Checks

a. Lock out all the primary and secondary power sources.

b. Inspect and tighten fasteners and setscrews, particularly fan mounting and bearing fasteners. Refer to Torque chart.

c. Inspect belt tension and pulley alignment.

d. Inspect motor wiring.

e. Ensure fan and ductwork are clean and free of debris.

f. Close and secure all access doors.

g. Restore power to the fan.

Start Up

Turn the fan on. In variable speed units, set the fan to its lowest speed and inspect for the following:

• Direction of rotation.

• Excessive vibration.

• Unusual noise.

• Bearing noise.

• Improper belt alignment or tension (listen for squealing).

• Improper motor amperage or voltage.

NOTICE! If a problem is discovered, immediately shut the fan off. Lock out all electrical power and check for the cause of the trouble. See Troubleshooting.

Inspection

Inspection of the fan should be conducted at the first 30

minute, 8 hour and 24 hour intervals of satisfactory opera-

tion. During the inspections, stop the fan and inspect as per the chart below.

Page 28

Wiring Diagrams

Single Speed, Single Phase Motor

When ground is required, attach to ground A or B with no. 6 thread forming screw. To reverse, interchange T-1 and T-4.

2 Speed, 2 Winding, Single Phase Motor

T-1

T-4

Ground B

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-1 and T-4 leads.

Single Speed, Single Phase, Dual Voltage

T-5

J-10

Ground B

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-5 and J-10 leads.

Typical Damper Motor Schematic

Fan

Motor

Transformer**

Ground A

Damper

Motor*

Ground A

Link A Link B

Low Voltage

Second Damper

Motor

High Speed

Low Speed

Line

J-10

Transformer**

T-5

Ground B

L3 L2 L1

Line

Ground A

Link A & B

For 3 phase, damper motor voltage should be the same between L1 and L2. For single phase application, disregard L3. *Damper motors may be available in 115, 230 and 460 volt models. The damper motor nameplate voltage should be verified prior to connection. **A transformer may be provided in some installations to correct the damper motor voltage to the specified voltage.

Line

Wiring Diagrams

3 Phase, 9 Lead Motor Y-Connection

Low Voltage

208/230 Volts

728

L2L

To reverse, interchange any 2 line leads.

2 Speed, 1 Winding, 3 Phase Motor

Motor

To reverse, interchange any 2 line leads. Motors require magnetic control.

2 Speed, 2 Winding, 3 Phase

To reverse: High Speed-interchange leads T11 and T12. Low Speed-interchange leads T1 and T2. Both Speeds-interchange any 2 line leads.

SQI-D 70-90

Black (High)

Blue (Medium)

NOTE: Insulate unused leads separately; leads are located at the motor inside the unit.

FSC

3 Phase, 9 Lead Motor Delta-Connection

3 9

High Speed

1 2 3

4 5

High Voltage

460 Volts

456

789

Together

L2L

1 2

Low Voltage

208/230 Volts

Line

High Voltage

7 6

L3L

460 Volts

789 456

L1L

Low Speed

Line

Motor

3 4

Open

5 6

White Line

* *

Red (Low)

WHITE

Line

SQI-D

FAN*

FSC

BLACK

*See SQI Wiring Diagram for correct lead.

Page 29

30 Minute Interval

Inspect bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.

8 Hour Interval

Inspect belt alignment and tension. Adjust and tighten as necessary.

24 Hour Interval

Inspect belt tension. Adjust and tighten as necessary.

Maintenance

Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and location of the fan.

Inspect fans exhausting corrosive or contaminated air within the first month of operation. Fans exhausting contaminated air (airborne abrasives) should be inspected every three months.

Yearly inspections are recommended for fans exhausting non-contaminated air. It is recommended the following inspections be conducted twice per year.

• Inspect bolts and setscrews for tightness. Tighten as necessary. Refer to Torque chart.

• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. Refer to Belt and Pulley Installation.

• Bearings should be inspected as recommended in the Conditions Chart.

• Inspect for cleanliness. Clean exterior surfaces only. Removing dust and grease on motor housing assures proper motor cooling.

Recommended Torque for Setscrews/Bolts (IN/LB)

Setscrews

Size

No.10 3/32” 28 33 3/8”-16 240

1/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 1200

3/8” 3/16” 228 275 3/4”-10 2100

7/16” 7/32” 348 384 7/8”-9 2040

1/2” 1/4” 504 600 1”-8 3000 5/8” 5/16” 1104 1200 1-1/8”-7 4200 3/4” 3/8” 1440 1800 1-1/4”-7 6000

Key Hex

Across

Flats

Recommended

Torque

Min. Max. Size

Hold Down Bolts

Wrench

Torque

Fan Bearings

The fan bearings are provided prelubricated. Any specialized lubrication instructions on fan labels supersedes information provided herein. Bearing grease is a petroleum lubricant in a lithium base conforming to a NLGI #2 consistency. If user desires to utilize another type of lubricant, they take responsibility for flushing bearings and lines, and maintaining a lubricant that is compatible with the installation.

A NLGI #2 grease is a light viscosity, low-torque, rustinhibiting lubricant that is water resistant. Its temperature range is from -30°F to 200°F and capable of intermittent highs of 250°F.

Bearings should be relubricated in accordance with the condition chart below.

For best results, lubricate the bearing while the fan is in operation. Pump grease in slowly until a slight bead forms

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

In the event that the bearing cannot be seen, use no more

than three injections with a hand operated grease gun.

Conditions Chart

RPM Temp °F Greasing Interval

Up to 1000

1000 to 3000

Over 3000

Any Speed < -30 Consult Factory Any Speed > 200 1 week

For moist or otherwise contaminated installations; divide the interval by a factor of 3. For vertical shaft installations divide the interval by a factor of 2.

-30 to 120 6 months

120 to 200 2 months

-30 to 120 3 months

120 to 200 1 month

-30 to 120 1 month

120 to 200 2 weeks

Motor Bearings

Motors are provided with prelubricated bearings. Any lubrication instructions shown on the motor nameplate supersede instructions below.

Direct Drive 1050/1075,1200,1300 &1500 rpm units use a prelubricated sleeve bearing that has a oil saturated wicking material surrounding it. The initial factory lubrication is adequate for up to 10 years of operation under normal conditions. However, it is advisable to add lubricant after 3 years. Use only LIGHT grade mineral oil or SAE 10W oil up to 30 drops. If the unit has been stored for a year or more it is advisable to lubricate as directed above. For VCR direct drive units and other units in severe conditions, lubrication intervals should be reduced to half.

Motors without sleeve bearings (as described above) will have grease lubricated ball or roller bearings. Motor bearings without provisions for relubrication will operate up to 10 years under normal conditions with no maintenance. In severe applications, high temperatures or excessive contaminates, it is advisable to have the maintenance department disassemble and lubricate the bearings after 3 years of operation to prevent interruption of service.

For motors with provisions for relubrication, follow intervals of the table below

Relubrication Intervals

Service

Conditions

Standard 3 yrs. 6 months 2 yrs. 6 months 1 yr. 3 months

Severe 1 yr. 3 months 1 yr. 3 months 6 months 1 months

Up to and

including 184T

1800 RPM

and less

Over 1800

RPM

NEMA Frame Size

213T-365T 404T and larger

1800 RPM

and less

Over 1800

RPM

1800 RPM

and less

Over 1800

RPM

Motors are provided with a polyurea mineral oil NGLI #2 grease. All additions to the motor bearings are to be with a comparable grease such as Exxon Mobil Polyrex EM and Chevron SRI.

The above intervals should be reduced to half for vertical

shaft installations.

Motor Services

Should the motor prove defective within a one-year period, contact your local Loren Cook Company representative or your nearest authorized electric motor service representative.

Page 30

Changing Fan Speed

All belt driven fans with motors up to and including 5 HP

are equipped with variable pitch pulleys.

a. Loosen setscrew on motor pulley. b. Open or close the groove facing to change the pitch

diameter.

Speed Reduction - Open the pulley in order that the

belt rests deeper in the groove.

Speed Increase - Close the pulley in order that the

belt rests higher in the groove. Ensure RPM limits of the fan and the horsepower limits of the motor are maintained.

c. Retighten pulley setscrew on one of the flat areas of

the motor shaft.

d. After the adjustment is made, check for proper belt

Maximum RPM

SQI-B

Size

120 2966 150 2692 135 2460 165 2687 150 2209 180 1958 165 2158 195 1901 180 1814 210 1702 195 1590 225 1797 210 1417 245 1775 225 1490 270 1525 245 1485 300 1271 270 1244 330 1208 300 1041 365 1000 330 992 402 995 365 833 402 714

Maximum RPM

90 3341 135 2624

SQI-HP

Size

Maximum RPM

e. Slide new bearings onto the shaft to the desired loca-

tion and loosely mount bearings onto the bearing support. Bearing bolts and setscrews should be loose enough to allow shaft positioning.

f. Correctly position the wheel and tighten the bearing

bolts securely to the bearing plate.

g. Align setscrews bearing to bearing and secure tightly

to the shaft.

NOTICE! Never tighten both pairs of setscrews before securing bearing mounting bolts. This may damage the shaft.

h. Inspect the wheel position again. If necessary, read-

just by loosening the bearing bolts and setscrews and repeat from step e.

Wheel Replacement

a. Drill two 1/4” diameter holes, 180 apart centered

approximately between the shaft and the outside diameter of the hub, 3/8” to 1/2” in depth.

b. Tap 1/4” holes to 5/16” thread with a 5/16” hole tap.

Do not drill or tap greater than recommended.

c. Screw the puller arms to the full depth of the threads

into the tapped holes. Align center of the puller with the center of the shaft. Ensure all setscrews in the hub, normally two, are fully removed.

d. Slowly remove wheel from the shaft.

tension. See the Belt and Pulley Installation section.

Pulley and Belt Replacement

a. Remove pulleys from their respective shafts. b. Clean the motor and fan shafts. c. Clean bores of pulleys and coat the bores with heavy

oil.

d. Remove grease, rust, or burrs from the pulleys and

shafts. e. Remove burrs from shaft by sanding. f. Place fan pulley on fan shaft and motor pulley on its

shaft.

NOTICE! Do not hammer the pulleys onto the shafts because this may damage the bearings.

g. Tighten in place. h. Install belts on pulleys and align as described in the

Belt and Pulley Installation section.

Bearing Replacement

The SQI-B fan bearings are pillow block ball bearings.

a. Remove outer access door. b. Remove bolts/screws to inner housing access doors.

Open and remove the inner access door to reveal

bearings. c. Remove the old bearing. d. Remove any burrs from the shaft by sanding.

Above - Drilled hole placement. Right - Wheel puller.

Recommended Puller

Lisle No. 45000 Sterling Wheel Puller. This puller is avail-

able at most automotive parts retail outlets.

Page 31

Wheel-to-Inlet Clearance

The correct wheel-to-inlet clearance is critical to proper fan performance. This clearance should be verified before initial startup since rough handling during shipment could cause a shift in fan components. Refer to wheel/inlet drawing for correct overlap.

Adjust the overlap by loosening the wheel hub and moving the wheel along the shaft to obtain the correct value.

A uniform radial gap (space between the edge of the cone and the edge of the inlet) is obtained by loosening the inlet cone bolts and repositioning the inlet cone.

Troubleshooting

Problem and Potential Cause Low Capacity or Pressure

•Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

•Poor fan inlet conditions. There should be a straight clear duct at the inlet.

•Improper wheel alignment.

Excessive Vibration and Noise

•Damaged or unbalanced wheel.

•Belts too loose; worn or oily belts.

•Speed too high.

•Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

•Bearings need lubrication or replacement.

Overheated Motor

•Motor improperly wired.

•Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or belt drive assembly.

•Cooling air diverted or blocked.

•Improper inlet clearance.

•Incorrect fan RPMs.

Size Overlap

70 - 165 3/16” 180 - 245 1/4” 270 - 300 5/16” 330 - 365 3/8”

402 7/16”

Overheated Bearings

•Improper bearing lubrication

•Excessive belt tension.

Page 32

SQI-D Parts List

Discharge View

Inlet View

Air Flow

Inlet View

Air Flow

Part

No.

1 Hex Bolts) Hex Bolt Hex Bolt Hex Bolt 2 Inlet Panel Inlet Panel Inlet Panel Inlet Panel 3 Inlet Inlet Inlet Inlet 4 Access Door Access Door Access Door Access Door 5 Electric Box Electric Box Electric Box Electric Box 6 Straightening Vanes Straightening Vanes Straightening Vanes Straightening Vanes

Not Shown:

7 Wheel Assembly Wheel Assembly Wheel Assembly Wheel Assembly 8 — — — Slot Cover 9 Motor Motor Motor Motor

Sizes 70-90 Size 120 Size 135 Sizes 150-165

Description

Discharge View

Page 33

SQI-B Parts List

Discharge View

Inlet View

Air Flow

Inlet View

Discharge View

Air Flow

Part

No.

90 - 165 180 - 210 225 - 402

Description

1 Motor Plate Motor Plate Motor Plate 2 Hex Bolt Hex Bolt Hex Bolt 3 Inlet Panel Inlet Panel Inlet Panel 4 Inlet Inlet Inlet 5 Access Door Access Door Access Door 6 Straightening Vane Straightening Vane Straightening Vane 7 Driven Sheave Driven Sheave Driven Sheave 8 Belt Set Belt Set Belt Set 9 Driver Sheave Driver Sheave Driver Sheave

10 Motor Motor Motor

Not Shown:

11 Wheel Assembly Wheel Assembly Wheel Assembly 12 Slot Cover Slot Cover Slot Cover 13 Bearings Bearings Bearings 14 Shaft Shaft Shaft

Limited Warranty

This warranty is granted only to the original purchaser placing the fan in service. This warranty is void if the fan or any part thereof has been altered or modified from its original design or has been abused, misused, damaged or is in worn condition or if the fan

has been used other than for the uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear. To make a warranty claim, notify Loren Cook Company, General Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining in writing, in detail, your complaint

and referring to the specific model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notified, within thirty (30) days of our receipt of your complaint, in writing, as to the manner in which your claim will be handled. If you are entitled to warranty relief, a warranty adjustment will be completed within sixty (60) business days of the receipt of your written complaint by Loren Cook Company.

This warranty gives only the original purchaser placing the fan in service specifically the right. You may have other legal rights which vary from state to state. For fans provided with motors, the motor manufacturer warrants motors for a designated period stated in the manufacturer’s warranty. Warranty periods vary from manufacturer

to manufacturer. Should motors furnished by Loren Cook Company prove defective during the designated period, they should be returned to the nearest authorized motor service station. Loren Cook Company will not be responsible for any removal or installation costs.

Corporate Offices: 2015 E. Dale Street Springfield, MO 65803 417.869.6474

lorencook.com

SQI IOM - Dec 2016

Page 34

Limited Warranty

This warranty is granted only to the original purchaser placing the fan in service. This warranty is void if the fan or any part thereof has been altered or modified from its

original design or has been abused, misused, damaged or is in worn condition or if the fan has been used other than for the uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear.

This warranty gives only the original purchaser placing the fan in service specifically the right. You may have other legal rights which vary from state to state.