Greenheck USGF (462077) - Manual (Page 8)

8 Model USGF Ultimate Steel Grease Fan
®
Operation
1. Before starting up or operating fan, check all
fasteners for tightness. In particular, check the
setscrews in wheel hub (and pulleys, if applicable).
2. While in the OFF position or before connecting the
fan to power, turn the fan wheel by hand to be sure it
is not striking the venturi or any obstacle.
3. Start the fan and shut it off immediately to check
rotation of the wheel with directional arrow in the
motor compartment, see figure 13.
4. When the fan is started, observe the operation and
check for any unusual noises.
5. With the system in full operation and all ductwork
attached, measure current input to the motor and
compare with the nameplate rating to determine if
the motor is operating under safe load conditions.
6. Keep inlets and approaches to fan clean and free
from obstruction.
Inspection
Inspection of the fan should be conducted at the first
30 minute and 24 hour intervals of satisfactory operation.
30 Minute Interval
Inspect bolts, setscrews and motor mounting bolts.
Adjust and tighten as necessary.
24 Hour Interval
Check all internal components. Inspect belt alignment
and tension. Adjust and tighten as necessary.
Maintenance
Once the fan has been put into operation, a periodic
maintenance program should be set up to preserve
the reliability and performance of the fan. Installation
and maintenance are to be performed only by qualified
personnel who are familiar with local codes and
regulations and who are experienced with this type of
equipment.
Motor maintenance is generally limited to cleaning and
lubrication (where applicable). Cleaning should be limited
to exterior surfaces only. Removing dust buildup on
motor housing ensures proper motor cooling.
Greasing of motors is only intended when fittings are
provided. Many fractional horsepower motors are
permanently lubricated and should not be lubricated
after installation. Motors supplied with grease fittings
should be greased in accordance with manufacturers’
recommendations. Where motor temperatures do not
exceed 104ºF (40ºC), the grease should be replaced after
2,000 hours of running time as a general rule.
Wheels require strong attention when moving air
in grease applications. Grease, oil and dust may
accumulate causing an imbalance. When this occurs, the
wheel and housing should be cleaned to ensure smooth
and safe operation.
All fasteners should be checked for tightness each time
maintenance checks are performed prior to restarting
unit.
A proper maintenance program will help these units
deliver years of dependable service.
Belt/Bearing Maintenance
1. Belts tend to stretch after a period of time. They
should be checked periodically for wear and
tightness. When replacing belts, use the same type
as supplied with the unit.
2. Matched belts should always be used on units with
multigroove pulleys.
3. For belt replacement, loosen the tensioning device
enough to allow removal of the belt by hand. Do not
force belts on or off. This may cause cords to break
leading to premature belt failure.
4. Once installed, adjust belts as shown in “Pre‑Starting
Checks.”
5. Shaft bearings can be classified in two groups:
relubricating and non‑relubricating. All bearings on
model USGF fans are factory lubricated and require
no further lubrication under normal use (between
‑20º to 180ºF (-29º to 82ºC) in a relatively clean
environment).
6. Units installed in hot, humid or dirty locations should
be equipped with special bearings. These bearings
will require frequent lubrication. Caution should be
taken to prevent over packing or contamination.
7. Grease fittings should be wiped clean. The unit
should be in operation while lubricating. Extreme
care should be used around moving parts.
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. When installing restaurant exhaust applications
follow NFPA 70 for cleaning fans.
10. Grease containers must be emptied at regular
intervals to prevent overflow.
11. To ensure tightness, check pulley setscrews. Proper
keys must be in keyways.
12. Fan RPM should not be readjusted. Only use pulleys
of identical size and type when replacing pulleys.
13. During the first few months of operation check
bearing setscrews periodically to ensure tightness.
14. 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.
WARNING
Correct direction of wheel rotation is critical.
Reversed rotation will result in poor air performance,
motor overloading and possible burnout.
WARNING
Always disconnect, lock and tag power source before
servicing. Failure to disconnect power source can
result in fire, shock or serious injury.
WARNING
This unit should be made non‑functional when cleaning
the wheel or housing (fuses removed, disconnect
locked off).