Greenheck USGF (462077) - Manual (Page 9)

9 Model USGF Ultimate Steel Grease Fan
®
Recommended Relubrication Frequency in Months
If unusual environment conditions exist (extreme temperature, moisture or contaminants) more frequent lubrication is
required.
A good quality lithium base grease, conforming to NLGI Grade 2 consistency, such as those listed here may be used.
Table 3: Grease Manufacturers
Manufacturer Grease (NLGI #2)
U.S. Electric Motors Grease No. 83343
Chevron U.S.A. Inc Chevron SRI Grease #2
Mobil Oil Corporation
Mobilith
Mobil 532
Texaco, Inc.
Premium BRB #2
Texaco Multifak #2
Amoco Oil Co. Rykon Premium #2
Exxon Unirex N2
Shell B Shell Alvania #2
Table 2: Suggested Fan Bearing Greasing Intervals
Interval
(months)
Type of Service
1 to 3
Heavy duty in dirty, dusty locations; high
ambient temperatures; moisture laden
atmosphere; vibration.
3 to 6
12 to 24 hours per day, heavy duty, or if
moisture is present
6 to 12
8 to 16 hours per day in clean, relatively dry
atmosphere
12 to 18
Infrequent operation or light duty in clean
atmosphere
Dampers must open fully.
Use motorized dampers
in low airflow applications
to reduce losses.
Avoid sharp turns or
entrance conditions
which cause uneven flow.
Use turning vanes in
elbows to reduce adverse
effects.
Provide uniform airflow
at fan inlet to assure
optimum performance.
Provide uniform airflow
at fan inlet and through
the damper to assure
optimum performance.
The curb cap should be
three wheel diameters
from the radius. Use
turning vanes in duct
when possible.
Fan Inlet Connections
In order to assure proper fan performance, caution must be exercised in fan placement and connection to the
ventilation system. Obstructions, transitions, poorly designed elbows, improperly selected dampers, etc, can cause
reduced performance, excessive noise and increased mechanical stress. For performance to be as published, the
system must provide uniform and stable airflow into the fan.
Poor Poor Good
Good
Poor Poor Good
Good