CARNES VBBB Інструкції з монтажу, експлуатації та обслуговування - Сторінка 5
Переглянути онлайн або завантажити pdf Інструкції з монтажу, експлуатації та обслуговування для Вентилятор CARNES VBBB. CARNES VBBB 8 сторінок. Centrifugal fans
Друкувати сторінкуc. Check drive alignment and tension. Does this meet
with drive manufacturer's recommendations?
d. Correct any problems which may have been found.
(Follow safety guidelines - shut power off.) Perform
checklist again until unit is operating properly.
e. Run unit up to speed.
6. After one week of operation, check all nuts, bolts and
set screws and tighten if necessary.
MAINTENANCE OF FANS
This section contains general maintenance instructions for
your CARNES CO. unit. For specific information about
maintenance of components, particularly for
special application fans, see the attached documents.
GENERAL MOTOR MAINTENANCE
The three basic rules of motor maintenance are:
Keep the motor clean, dry and properly lubricated.
Keeping motors and windings clean is important because
dirt and dust serve as thermal insulators. Heat normally
dissipated by the motor is trapped causing overheating
and/or premature failure. Blow dust and dirt out of windings
and off the motor periodically. Use a low pressure (50 psig)
air stream so that winding damage does not occur. Keep
the area surrounding the motor open so that air can circu-
late through the motor cooling fan. Follow normal mainte-
nance schedule given below.
Motors should be kept dry to avoid electrical short circuits.
Motors kept in storage for long periods of time can have
moisture condense on the windings. Be certain the motor
is dry before using.
Some motors are lubricated for life. Motor bearing lubrica-
tion, if required, must follow a rigorous schedule. Motors
less than 10 HP running about eight hours a day in a clean
environment should be lubricated once every five years;
motors 15 to 40 HP, every 3 years; and motors 50 to 150
HP, yearly. For motors in dusty or dirty environments or
running 24 hours a day, divide the service interval by two.
If the environment is very dirty or high temperatures exist,
divide the service interval by 4. Lubrication requirements
are normally attached to the motor. Do not over lubricate.
DRIVE MAINTENANCE
V-belt drives need periodic inspection and occasional belt
replacement. When inspecting drives, look for dirt buildup,
burrs or obstructions which can cause premature belt or
drive replacement. If burrs are found, use fine emery cloth
or a stone to remove the burr. Be careful that dust does
not enter the bearings.
Check the sheaves for wear. Excessive slippage of belts
on sheaves can cause wear and vibration. Replace worn
sheaves with new ones. Carefully align sheaves to avoid
premature sheave failure.
Observe belts for wear. If fraying or other wear is observed
to be mostly on one side of the belts, the drives may be
misaligned. Reinstall the drives according to instructions
given for Fan Installation of Disassembled Units, part 9.
Never use belt dressing on any belts.
When replacing belts, replace the entire set. After initial
replacement and tensioning, recheck belt tension after a
few days to adjust belt tension again. (New belts require a
break-in period of operation.)
BEARING MAINTENANCE
Any instructions covering special lubrication intervals,
bearing assembly or disassembly, or installation details
may be found in the appendix. Any bearing which is disas-
sembled should be kept separate from other bearing parts
as components may not be interchangeable. Maintain
cleanliness of components and bearings to prevent bear-
ing contamination.
Bearing failure can occur from many causes. See Trouble-
shooting section for details.
LUBRICATION
Proper lubrication of bearings helps assure maximum
bearing life. All fans are equipped with decals indicating
relubrication intervals for normal operating conditions.
However, every installation is different and the frequency of
lubrication should be established accordingly.
Experience has shown that airborne moisture and heavy
dust will dramatically reduce the life of the bearing lubri-
cant. If any of these adverse conditions exist it is recom-
mended that bearings be regreased after several days of
operation. Lubrication intervals can then be adjusted based
on the condition of the purged grease.
Figure 8: Ball Bearings
1.
This equipment must not be operated without proper guarding of all moving parts. While per-
forming maintenance be sure remote power switches are locked off. See AMCA Publication
410 for recommended safety practices.
2.
Before starting: Check all set screws for tightness, and rotate wheel by hand to make sure it
has not moved in transit.
RELUBRICATION SCHEDULE (MONTHS) *
Ball Bearing Pillow Blocks
SPEED (RPM)
500
1000
SHAFT DIAMETER
1/2" thru 1-11/16"
6
6
1-15/16" thru 2-7/16"
6
5
2-11/16" thru 2-15/16"
5
4
3-7/16" thru 3-15/16"
4
3
*Suggested initial greasing interval - relubricate while running, if safety permits, until some purging
occurs at seals. Adjust lubrication frequency depending on condition of purged grease. Hours of
operation, temperature, and surrounding conditions will affect the relubrication frequency required.
1. Lubricate with a high quality NLGI No. 2 or No. 3 multipurpose ball bearing grease having rust
inhibitors and antioxidant additives. Some grease having these properties are:
Shell - Alvania No. 2
Gulf - Gulfcrown No. 2
2. Lubricate bearings prior to extended shutdown or shortage and rotate shaft monthly to aid
corrosion protection.
WARNING
1500
2000
2500
3000
3500 4000 5000
5
3
3
2
2
4
2
2
1
1
3
2
1
1
1
2
1
1
1
Mobil - Mobilith 22
American - Rykon Premium 2
2
1
1
1
5