CARNES VFBB 설치, 운영 및 유지보수 지침 - 페이지 2

{카테고리_이름} CARNES VFBB에 대한 설치, 운영 및 유지보수 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. CARNES VFBB 8 페이지. Centrifugal fans

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Housing should be lifted using straps and spreaders. Do not

distort housing or side plates when lifting.

Bearing pedestals should be lifted using straps or padded

chains. Under no circumstances should an attached or sep-

arated bearing pedestal be lifted by the shaft, bearings, dri-

ves, motor or wheel.

The shaft and wheel assembly may be lifted using a hoist

and a spreader with a sling around

the shaft at points nearest the

wheel (See Figure 2). Take care not

to scratch the shaft where the

wheel or bearings will be mounted.

Never lift or support the assembly

by the wheel. Always support the

assembly by the shaft when lifting

or storing. Do not support the shaft

or the wheel on housing sides. Use

only the key provided with the shaft

Figure 2

and wheel.

Wheels shipped separately can be lifted by slings running

through the blades and around the hub. Never lift the wheel

by blades or flanges. Always transport wheels by lifting. do

not roll the wheel as this can damage coatings and change

the balance of the wheel.

Bent shafting is a source of vibration and bearing failure, so

handle the shaft with care. Any scratches on the shaft may

be removed with fine emery cloth or a stone.

UNIT STORAGE

If fan installation is to be delayed, store the unit in an envi-

ronmentally stable and protected area. Vibration should not

exceed 2 mils at the storage site unless the fan is properly

isolated from the vibration. The unit should be reasonably

protected from any accidental impacts. Cover the fan to pro-

tect coatings and to prevent any foreign material or moisture

from entering the inlet or discharge. Take care to protect the

motor, drives and bearings.

Extended storage requires monthly inspections. Check for

corrosion or damage to the unit and for debris within the fan.

Rotate the fan wheel a few revolutions. Stop the wheel in a

position other than the initial position. Grease the bearings

every month with a grease compatible with the grease sup-

plied with the bearings. (See any attachments concerning spe-

cific bearings.)

FOUNDATIONS AND SUPPORTING STRUCTURES

Floor mounted fans should be installed on a flat, level, rigid

concrete foundation with a mass at least three times that of

the assembly supported. The plan area should be no more

than twice that required by the equipment. Foundations with

larger areas should have correspondingly larger mass.

Anchor bolts should be "L" or "T" shaped with sufficient

length for nuts, washers, shims, and threads for draw down.

Each bolt should be placed in a sleeve or pipe with diame-

ter larger than the bolt to allow for adjustment.

Fans mounted to or within a structure should be placed as

close as possible to a rigid member, such as a wall or col-

umn. The structure must be designed for rotating equip-

ment—static design for strength is not sufficient to assure

proper operation. Supports for suspended fans must be

cross-braced to prevent side-sway. Structural resonance

should be at least 20% from fan operating speed. Use vibra-

tion isolators where applicable.

Any ducting should have independent support - do not use

the fan to support ducting. Isolating the fan from ductwork

with flex connections eliminates transmission of vibration.

Fans handling hot gases require expansion joints at both the

inlet and discharge to prevent excessive loads caused by

thermal growth.

FAN INSTALLATION - FACTORY ASSEMBLED UNITS

Follow proper handling instructions given earlier.

1. Move the fan to the final mounting position.

2. Remove skids, crates and packing materials carefully.

3. Place vibrations pads or isolation base on mounting bolts.

Line up holes in fan base with bolts.

4. Place fan on mounting structure. Carefully level unit

using shims as required at all mounting hole locations.

Bolt down unit.

5. Any grout my now be used. The fan should already be

bolted in position before grout is applied. Do not depend

upon grout alone to support rotating equipment.

6. Continue with Operations section.

Additional instructions may be given for some fan models,

components and accessories in the appendix.

FAN INSTALLATION - DISASSEMBLED UNITS

A unit is considered "disassembled" if any component

required for proper operation is shipped or supplied sepa-

rately or in pieces. References earlier instructions concern-

ing proper handling of fan components.

All units where assembly of the fan housing or bearing

pedestal or drive stand is required will have matching sym-

bols on adjacent parts. These symbols are used to identify

which components are joined together. Units which require

extensive assembly may require additional instructions

located in the appendix. Special instructions for some com-

ponents and accessories are also in the appendix.

Instructions for mounting and assembly of unit:

1. Move lower housing/framework to mounting location.

2. If vibration pads or bases are used, place on bolts first.

Place lower housing assembly onto bolts.

3. Level and shim if required. Bolt into place.

4. If separated pedestal or bearing pedestal:

a. Bring bearing pedestal to desired location.

b. Place any vibration base or pads into place. Set

bearing pedestal on bolts.

c. Never distort bearing pedestal by forcing it to align