Fan Inlet Connections - Greenheck H-G Series Installation, Operation And Maintenance Manual

8. Grease should be pumped in very slowly until a slight
bead forms around the seal. A high grade lithium
base grease should be used.
9. To ensure tightness check pulley setscrews. Proper
keys must be in keyways.
10. Fan RPM should not be readjusted. Only use pulleys
of identical size and type when replacing pulleys.
11. During the first few months of operation check
bearing set screws periodically to ensure tightness.
12. If unit is to be left idle for an extended period,
remove belts and store in a cool, dry place to avoid
premature belt failure.
Recommended Relubrication Frequency in
Months
NOTE: 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 2: Suggested Fan Bearing Greasing Intervals
Interval
(months)
Heavy duty in dirty, dusty locations; high ambient
 to 3 temperatures; moisture laden atmosphere;
vibration.
12 to 24 hours per day, heavy duty, or if moisture
3 to 6
is present
8 to 16 hours per day in clean, relatively dry
6 to 
atmosphere
Infrequent operation or light duty in clean
 to 8
atmosphere

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
Dampers must open
fully. Use motorized
dampers in low airflow
applications to reduce
losses.
Type of Service
Poor
Avoid sharp turns or
entrance conditions
which cause uneven
Good
flow. Use turning vanes
in elbows to reduce
adverse effects.
Table 3: Grease Manufactures
Manufacturer
U.S. Electric Motors
Chevron U.S.A. Inc
Mobil Oil Corporation
Texaco, Inc.
Amoco Oil Co.
Exxon
Shell
Poor
Good
Provide uniform
airflow at fan inlet
to assure optimum
performance.
Grease (NLGI #)
Grease No. 83343
Chevron SRI Grease #2
Mobilith
Mobil 532
Premium BRB #2
Texaco Multifak #2
Rykon Premium #2
Unirex N2
B Shell Alvania #2
Poor
Good
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.
Good
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