Greenheck Fan Mixed Flow Fans Belt and Direct Drive QEI-L - Manual (Page 4)

Value Added Features
Maintenance / Serviceable Construction Advantages
The following value added features are incorporated into the design to allow for quick and
easy field service.
QEI-L and QEI service advantages:
• Bearing lubrication is performed through extended grease fittings located on the
outside of the fan housing.
• The entire shaft and bearing assembly can be removed as a single assembly from
the inlet end of the fan housing.
• An adjustable motor base is provided for tightening the fan belts.
QEID service advantages:
• Extended lubrication lines are provided for motor bearing requiring lubrication.
Smaller frame motors use sealed bearings and are permanently lubricated.
Electrostatic Powder Coatings
Powder coatings offer a uniform, durable and high-quality finish.
Standard powder coating is a one-coat process applied over
a phosphatized surface that generally meets or exceeds the
corrosion resistance of a comparable wet paint.
Greenheck offers a number
of in-house coatings applied
via “electrostatic powder.” The
standard coating, Permatector™,
is excellent for indoor or outdoor
applications and is resistance to
many common chemicals. Consult
Greenheck’s Product Application
Guide, Performance Coatings for
Ventilation Products
, for a complete
listing of coatings and a relative
resistance chart. For corrosive environments (i.e. coastal), see page 9
for information on our zinc-rich basecoat technology.
Quality Assurance Test
Before shipment, all Greenheck mixed flow fans are tested at the design speed after final assembly.
QEI-L fans are checked for amp draw and the levels are recorded. QEI-I/II and QEID fans are
subjected to a complete vibration analysis. The maximum allowable vibration on a QEI-I/II at the fan
bearings is 0.15 in/sec. peak velocity for the specified RPM. QEID maximum vibration is 0.08 in/sec.
peak velocity on the fan housing for the specified RPM. A record
of the vibration test result is available upon request.
By performing the vibration test, we are able to provide more than
wheel balancing, it is also a diagnostic tool for finding potential
problems. A defective bearing or motor, bent shaft or misaligned
sheaves may cause excessive vibration. A
complete vibration test will uncover
these problems before the fan leaves
the factory.
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