COOK AWD Series 설치, 운영 및 유지보수 매뉴얼 - 페이지 6

{카테고리_이름} COOK AWD Series에 대한 설치, 운영 및 유지보수 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. COOK AWD Series 13 페이지. Propeller wall fans
COOK AWD Series에 대해서도 마찬가지입니다: 설치, 운영 및 유지보수 매뉴얼 (17 페이지)

페이지 인쇄

Pulley and Belt Replacement

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.

NOTICE! 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 re-

moved from the shaft. The pulley will need replace-

ment 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 grease, rust and burrs from the shaft.

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

on the motor shaft. Damage to the pulleys can occur

when excessive force is used in placing the pulleys on

their respective shafts.

After the pulleys have been correctly placed back onto

their shafts, tighten the pulley setscrews.

8. Install the belts on the pulleys. Align and adjust the

belts to the proper tension as described in Belt and

Pulley Installation, page 2

Bearing Replacement

The fan bearings are pillow block ball bearings.

1. Mark the position of the shaft in reference to both the

bearing races and the propeller and pulley. Make a

note of the clearance between the propeller and the

frame.

2. Remove the pulley.

3. Remove the propeller from the shaft. A two-jaw puller

may be needed to remove the propeller from the shaft.

4. Remove the bearing hold-down bolts. Remove the

shaft and the bearings as one unit.

5. Remove the anti-corrosion coating from the shaft with

a suitable degreaser.

6. Remove the bearing from the shaft using a bearing

puller. If a bearing puller is not available, remove the

bearing by using a wood block and hammer. An emery

cloth or file may be needed to remove imperfections in

the shaft left by the setscrews.

Clean the shaft and bearing bore thoroughly.

8. Place the bearings into position ensuring they are not

on a worn section of the shaft. Tapping the inner ring

face with a soft driver may be required. Do not ham-

mer on the housing.

9. The outer ring of the bearing is spherical and swivels

in the housing to compensate for misalignment. Slight-

ly tighten the hold down bolts.

10. Align the setscrews on the bearings and tighten one

setscrew on each bearing.

11. Rotate the shaft to allow the bearing outer rings to find

the center of free movement.

12. Install the propeller on the shaft and adjust the bearing

position to center the propeller in the opening.

13. Tighten the hold-down bolts to the proper torque. Re-

fer to the Torque Chart, page 4.

14. Turn the shaft by hand. Resistance should be the

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

tightened.

PROPELLER WALL IO&M

15. Tighten the bearing setscrews to the specified torque.

16. Install the pulley and adjust the belt tension.

17. After 24 hours of continuous operation, tighten the set-

screws to the appropriate torque. This assures the full

locking of the inner race to the shaft. Ensure the sock-

et key or driver is in good condition with no rounded

corners. The key should be fully engaged in the set-

screw and held squarely to prevent the rounding out of

the setscrew socket when applying maximum torque.

18. Tighten the bearing setscrews to the specified torque.

19. Install the pulley and adjust the belt tension.

20. After 24 hours of continuous operation, tighten the set-

screws to the appropriate torque. This assures the full

locking of the inner race to the shaft. Ensure the sock-

et key or driver is in good condition with no rounded

corners. The key should be fully engaged in the set-

screw and held squarely to prevent the rounding out of

the setscrew socket when applying maximum torque.

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

• 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:

• 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

B51091-003