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Final Installation Steps

1. Inspect

fasteners

mounting and bearing fasteners then tighten according to

Recommended Torque for Setscrews/Bolts.

2. Inspect for correct voltage with a voltmeter.

3. Ensure all accessories are installed.

Operation

Pre-Start Checks

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

2. Ensure fasteners and setscrews, particularly those used

for mounting the fan, are tightened.

3. Inspect belt tension and pulley alignment.

4. Inspect motor wiring.

5. Ensure belt touches only the pulley.

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

Inspect wheel-to-inlet clearance. The correct wheel-to-

inlet clearance is critical to proper fan performance.

8. Close and secure all access doors.

9. Restore power to fan.

Start-Up

Turn on the fan. In variable speed units, set 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 off the fan. Lock out all electrical power

and check for the cause of the trouble. Refer to

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.

Recommended Torque for Setscrews/Bolts (IN-LB)

Setscrews

Recommended

Key Hex

Torque

Size

Across

Flats

Min.

5/64"

#10

3/32"

1/4

1/8"

5/16

5/32"

140

3/8

3/16"

250

7/16

7/32"

355

1/2

1/4"

560

5/8

5/16"

1120

3/4

3/8"

1680

7/8

1/2"

4200

9/16"

5600

QMX IO&M

and

setscrews,

particularly

Hold Down Bolts

Recommended

Size

Torque

Max.

3/8"-16

324

1/2"-13

780

5/8"-11

1440

160

3/4"-10

2400

290

7/8"-9

1920

405

1"-8

2700

640

1-1/8"-7

4200

1280

1-1/4"-7

6000

1920

4800

6400

Maintenance

fan

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 inspections be con-

ducted 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 Con-

ditions Chart

• Inspect variable inlet vanes (if supplied) for freedom of op-

eration 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 direc-

tion as the wheel

• Inspect springs and rubber isolators for deterioration and

replace as needed

• Inspect for cleanliness. Clean exterior surfaces only. Re-

moving 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

exterior of the fan 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

Fan Status

Class

Normal Conditions

(clean, dry & smooth)

QMX

Extreme Conditions

(dirty/wet/rough)

Normal Conditions

(clean, dry & smooth)

QMXHP

Extreme Conditions

(dirty/wet/rough)

Normal Conditions

(clean, dry & smooth)

QMXXP

Extreme Conditions

(dirty/wet/rough)

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.

Maximum Interval

Shaft Size

(operation hrs)

>1-1/2"

7500

<1-1/2"

2000

>1-1/2"

1500

<1-1/2"

400

>2"

5000

<2"

1000

>2"

1000

<2"

200

>4"

2000

<4"

1000

>4"

400

<4"

200

B51092-005