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Vektor-CD Centrifugal Laboratory Exhaust
®
Motors
Motor maintenance is generally limited to cleaning
and lubrication. Cleaning should be limited to exterior
surfaces only. Removing dust and grease buildup on
the motor housing assists proper motor cooling. Never
wash-down motor with high pressure spray.
Greasing of motors is only intended when fittings are
provided. Many fractional motors are permanently
lubricated for life and require no further lubrication.
Motors supplied with grease fittings should be
greased in accordance with the manufacturer’s
recommendations. When motor temperature does not
exceed 104ºF (40ºC), the grease should be replaced
after 2000 hours of running time.
Direct drive systems have extended grease lines to
lubricate the motor without removal of any guarding.
Bearings
The bearings for Greenheck fans are carefully
selected to match the maximum load and operating
conditions of the specific class, arrangement, and
fan size. The instructions provided in this manual
and those provided by the bearing manufacturer will
minimize any bearing problems. Bearings are the
most critical moving part of the fan, therefore, special
care is required when mounting them on the unit and
maintaining them.
Greenheck Fan Corporation recommends bearings
to be relubricated quarterly at a minimum. All
Vektor-CD fans use Mobil Mobilith SHC 100 synthetic
grease conforming to NCGI Grade 2. Never mix
greases made with different bases. This will cause a
breakdown of the grease and possible failure of the
bearing. For specific information, contact the factory
representative or the fan system submittals.
Service
V-Belt Drives
The V-belt drive components, when supplied by
Greenheck Fan Corporation, have been carefully
selected for this unit’s specific operating condition.
Caution: Changing V-belt drive components could
result in unsafe operating conditions which may cause
personal injury or failure of the following components:
• Fan Shaft
• Fan Wheel
• Bearings
• V-belt
• Motor
V-Belt Drive Installation — Belt Drive
1. Remove the protective coating from the end of
the fan shaft using mineral spirits or another
similar solvent. Check to ensure that the shaft is
free of nicks and burrs.
2. Slide sheaves on shafts - do not drive sheaves on
as this may result in bearing damage.
3. Align fan and motor sheaves with a straight-edge
or string and tighten.
4. Place belts over sheaves. Do not pry or force
belts, as this could result in damage to the cords
in the belts.
5. Adjust the tension until the belts appear snug.
Run the unit for a few minutes and allow the belts
to “set” properly.
6. With the fan off, adjust the belt tension by moving
the motor pivot plate. When in operation, the
tight side of the belts should be in a straight line
from sheave to sheave with a slight bow on the
slack side.
FAN
MOTOR
FAN
MOTOR
Aligning sheaves with a straight edge