COOK AWB Series 설치, 운영 및 유지보수 매뉴얼 - 페이지 5

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

페이지 인쇄

• Inspect belt wear and alignment. Replace worn belts

with new belts and adjust alignment as needed. See Belt

and Pulley Installation, on page 2.

• Bearings should be inspected as recommended in the

Conditions Chart, below.

• Inspect for cleanliness. Clean exterior surfaces only.

Removing dust and grease on motor housing assures

proper motor cooling.

Lubricants

Loren Cook Company uses petroleum lubricant in a

lithium base conforming to NLGI grade 2 consistency.

Other grades of grease should not be used unless the

bearings and lines have been flushed clean. If another

grade of grease is used, it should be lithium-based.

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.

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 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

NEMA Frame Size

Up to and

including 184T

1800

Over

RPM

1800

and

RPM

less

3 yrs.

months

1 yr.

months

Motors are provided with a polyurea mineral oil NGLI #2

grease. All additions to the motor bearings are to be with a

compatable grease such as Exxon Mobil Polyrex EM and

Chevron SRI.

213T-365T

404T and larger

1800

Over

RPM

1800

and

RPM

less

2 yrs.

1 yr.

months

1 yr.

months

The above intervals should be reduced to half for vertical

shaft installations.

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, 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.

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

Up to 1000

1000 to

3000

Over 3000

Any Speed

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.

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.

Changing Shaft Speed

Over

1800

All belt driven Propeller Wall fans with motors up to and

RPM

including 5HP are equipped with variable pitch pulleys. To

change the fan speed, perform the following:

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

months

key, if equipped.

b. 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.

months

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).

Temp °F

Greasing Interval

-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

< -30

Consult Factory

> 200

1 week