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Size

Bushing

Q & R

P

Alum.

57

36

Steel.

120

84

Alum.

108

72

Steel

240

132

Alum.

228

132

Steel.

348

192

Initial Torque*

Second Torque*

Final Torque*

RECEIVING:

Chicago Blower Corporation equipment is prepared for shipment in

accordance with the Uniform Freight Classification. It is thoroughly

inspected at the factory and, barring damage in transit, should be in

good condition upon arrival.

When a carrier signs Chicago Blower Corporation’s bill of lading, the

carrier accepts the responsibility

for any subsequent shortages or

damage evident or concealed, and

any claim must be made against

the carrier by the purchaser.

Evident shortage or

damage should be

noted on the carrier’s delivery document

before signature of accep-

tance. Inspection by the carrier of damage evident or concealed must be

requested. After inspection, issue a purchase order for necessary parts

or arrange for return of the equipment to Chicago Blower Corporation

factory for repair.

Chicago Blower fans are shipped, skidded, and may be handled and

moved using good rigging techniques, being careful to avoid concentrated

stresses that distort any of the parts.

STORAGE:

If the fan installation is to be delayed, store the unit in a dry, protected

area. Protect the fan, especially fan and motor bearings, from moisture

and vibration. Protect all machined surfaces such as shafts, couplings,

and bushings. Rotate the wheel several revolutions every two weeks,

stopping the wheel in a position other than its initial position. Keep the

bearings fully greased by filling monthly with a grease compatible to that

originally supplied. Contact Chicago Blower for extended storage instructions.

SAFETY PRECAUTIONS:

The fan which you have purchased is a rotating piece of equipment and

can become a source of danger to life or cause injury if not properly

applied. The

maximum operating temperature

or

speed

for which this

fan is designed

must not be exceeded

. These limits are given in our

catalog or on Chicago Blower Corporation drawings.

Personnel who will operate this fan, or those who will perform mainte-

nance thereon,

must be given this bulletin to read and warned of the

potential hazards of this equipment.

This pamphlet contains general recommendations, but specific require-

ments may apply to the individual installation. Such requirements are

outlined in federal, state and local safety codes. Strict compliance with

these codes, and strict adherence to these installation instructions are

the responsibility of the user.

INSTALLATION:

1. Good results

require a proper foundation

. Foundations should be

level, rigid, and of sufficient mass for the equipment. Concrete is

preferable. Its mass should be at least four times the fan weight.

Adequately brace steel platforms in all directions. The minimum natu-

ral frequency of any part must be at least 50% higher than the fan

running speed.

2. Shim the fan support points before tightening foundation bolts. Do not

distort or twist the equipment. Duct connections should be smooth

and straight. Elbows and other transitions should be located at least

five wheel diameters from fan inlet and outlet (see AMCA Publication

201 for further details).

Flexible connections

should be used at inlet

and discharge. The

fan should never support or restrain

any duct

weight or force.

3. Make sure the power is locked “OFF”.

4. Check wheel-to-inlet clearance to make sure it has not shifted during

shipment or handling. There should be approximately equal radial

clearance all around. Rotate wheel by hand to check that it runs free.

5. If the wheel is striking, correct it by

loosening the hub set screws and

reposition the wheel on the shaft, or

loosen the motor mounting bolts

(for Arrangement 4 fans) and

realign the wheel to the inlet so it

does not hit. Position the wheel so

that the set screw over the key is at

the bottom. Torque the bottom set

screw first and then the opposing

set screw next. Torque all set

screws per Torque Values chart.

Turn wheel by hand to verify wheel

to inlet cone clearance.

6. If the fan wheel is fastened with a taper-lock bushing and the wheel

must be shifted, follow this procedure:

a. Remove all bolts from the bushings.

b. Insert two bolts in the threaded holes in the bushing. (Note that one

bolt is left over and not used in the demounting.)

c. Tighten bolts alternately until bushing is loosened in hub. If bushing

does not loosen immediately, lightly tap hub while applying

torque to the bolts.

To reinstall the taper-lock bushing in the wheel hub, insert the three

mounting bolts through the unthreaded bushing holes into the hub.

Alternately tighten the bolts. When tightening, the bolts should be

turned down equally to the Initial Torque requirement given below.

Then tighten the bolts progressively one-half turn per bolt to the

Second Torque setting. Finally, the bolts should be tightened in small

increments to the Final Torque settings.

*Torque values shown are inch lbs. and apply when both components

are either aluminum or steel. If either component is aluminum, use

values for aluminum. Values for steel are for Grade 5 hardware.

Check bushing to verify type or refer to bushing box sent with the fan.

7. Check the motor wiring and fusing in accordance with the National

Electrical Code and local requirements. Follow wiring diagram on the

motor nameplates.

8. Chicago Blower requires that all appurtenances, including ductwork or

stacks, which are attached to the fan inlet or outlet, be independently

supported, unless prior approval has been obtained from Chicago

Blower. Excess dead loads or wind loads can distort the fan housing

causing misalignment and possible failure. Flexible connections are

also necessary to prevent duct expansion or movement from adding

loads to the fan.

9. Chicago Blower recommends the use of caulk or gasket when

mounting appurtenances to the inlet or outlet flanges to minimize

leakage.

2

1/4

5/16

3/8

7/16

1/2

5/8

3/4

20

18

16

14

13

11

10

65.5

136.0

239.0

381.0

586.0

1163.0

2076.0

Bolt

Size

(In. Dia.)

Threads

Per

Inch

Steel Grade 2

Non-Plated

(Inch-lbs.)

SET SCREW TORQUE VALUES