Greenheck Fan 459968 Ventilation Hood User Manual


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Model TCF and Models QEI/QEID Centrifugal
®
WARNING
Lubricate bearings prior to periods of extended
shutdowns or storage and rotate shaft monthly to
aid in preventing corrosion. If the fan is stored more
than three months, the bearings should be purged
with new grease prior to start-up.
Recommended Fan Bearing Lubrication Schedule (in Months*)
Fan
RPM
Bearing Bore
1
⁄2 - 1 1
1
⁄8 - 1
1
⁄2 1
5
⁄8 - 1
7
⁄8
1
15
⁄16
- 2
3
⁄16
2
7
⁄16
- 3
3
3
⁄16
- 3
1
⁄2
3
15
⁄16
- 4
1
⁄2
To 250 6 6 6 6 6 5 4
500 6 6 6 5 4 3 3
750 6 5 4 3 3 2 2
1000 6 4 3 2 2 1 1
1250 5 3 2 1 1 0.5 0.5
1500 5 2 1 1 0.5 0.5 0.25
2000 5 1 1 0.5 0.25 0.25 0.25
2500 4 0.5 0.5 0.25 0.25 0.25
3000 4 0.5 0.25 0.25 0.25
V-Belt Replacement
The V-belt drive components, when supplied by
Greenheck Fan Corporation, have been carefully
selected for this unit’s specific operating condition.
Changing V-belt drive components could result
in unsafe operating conditions which may cause
personal injury or failure of fan components.
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 (refer to
unit start-up section) and allow the belts to “set”
properly.
6. With the fan off, adjust the belt tension by moving
the motor pivot plate. (Belts are adjusted by
raising or lowering 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
Motors
Motor maintenance is generally limited to cleaning
and lubrication. Cleaning should be limited to exterior
surfaces only. Removing dust and grease build-up on
the motor housing assists proper motor cooling.
Greasing of motor bearings is only required when
fittings are provided. Many fractional motors are
permanently lubricated 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.
CAUTION
Do not allow water or solvents to enter the motor or
bearings. Under no circumstances should motors or
bearings be sprayed with steam, water or solvents.
Fan Bearing Lubrication
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.
Refer to the following chart and the manufacturer’s
instructions for grease types and intervals for various
operating conditions. Never mix greases made with
different bases. This will cause a breakdown of the
grease and possible failure of the bearing.
*Suggested initial greasing interval is based on 12 hour per
day operation and 150º F. maximum housing temperature.
For continuous (24 hour) operation, decrease greasing
interval by 50%.
• Ifpossible,relubricatewithgreasewhileinoperation
without endangering personnel.
• Forballbearings(operating)relubricateuntilclean
grease is seen purging at the seals. Be careful not to
unseat the seal by over lubricating.
• Forballbearings(idle)add1-2shotsofgreaseupto2
in. bore sizes, and 4-5 shots of grease above 2 in. bore
sizes with hand grease gun.
• Forrollerbearings,relubricatewith4shotsofgreaseup
to 2 in. bore size, 8 shots for 2-5 in. bore size, and 16
shots above 5 in. bore size with hand grease gun.
• Adjustlubricationfrequencybasedonconditionof
purged grease.
• AhighqualitylithiumbasegreaseconformingtoNLGI
Grade 2 consistency, such as those listed below, should
be used.
Mobilith SHC 220 Texaco Multifak AFB2
Mobilith AW2 Texaco Premium RB
Shell Alvania #2 Exxon Unirex N2
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