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Operation and Maintenance Manual Efficient Silent Inline Fan - ESI

motors, etc. Multi-speed motors should with an acid resisting paint. Competent vibration level of the fan is also dependent
be started at lowest speed and run at high advice should be sought when corrosive upon its installation and foundation. Fans
speed only after satisfactory low speed fumes are present. shipped completely assembled have been
operation. Check fan speed on belt drive Blow out open type motor windings with trim balanced at the factory.
units and adjust motor sheave to give low pressure air to remove dust or dirt. Before any attempt is made at
the desired RPM. Balance system by Air pressure above 50 psi should not balancing, check for any other causes
adjusting damper or VIVs. be used as high pressure may damage of vibration or unbalance as listed in the
At first indication of trouble or vibration, insulation and blow dirt under loosened TROUBLESHOOTING CHECKLIST.
shut down and check for difficulty. tape. Dust can cause excessive insulation A fan handling clean air should not need
temperatures. Do not exceed OSHA air rebalancing after original balance. Dust
Maintenance pressure requirements. build-up on fan blades or wear can cause
Always disconnect or shut off fan Excessive vibration will shorten the life fan unbalance. Periodic inspection of the
before attempting any maintenance. of any mechanical device. Correct any fan should be made to determine the
A definite time schedule for inspecting all imbalance situation before returning fan amount of dirt build-up or wear.
rotating parts should be established. The to service. Portable instruments are available that
frequency of inspection depends on the LUBRICATION OF HINGE BEARINGS will indicate vibration in mils (1 mil = 0.001
severity of operation and the location of ON POWER ROOF VENTILATORS inches). Each fan has a Quality Assurance
the equipment. Stack cap damper hinge bearings are label affixed to the fan. All pertinent
Fan bearing alignment should be checked oil impregnated and may never need information on factory balance is recorded
at regular intervals. Misalignment can lubrication. A drop or two of 10W30 motor on the label for the owner's information
cause overheating, wear to bearing dust oil every 6 to 12 months will not hurt the and use.
seals, bearing failure and/or unbalance. bearings. Check damper operation to IMPORTANT NOTE:
Fan bearings should be lubricated at detect binding or checking. Adjust hinge THE FAN MUST BE CHECKED AND
regular intervals. Periodic inspection pin bearing bracket to resume free damper CORRECTED FOR ANY OUT OF
will be necessary. If grease is found to operation. BALANCE CONDITION ANY TIME
be breaking down, replenish grease by SHAFT COOLING WHEEL OPTION A COMPONENT OF THE ROTATING
pumping new grease into bearing until all (HIGH TEMPERATURE UNITS) ASSEMBLY IS REPLACED OR
the old grease has been evacuated. See ALTERED.
section on BEARING LUBRICATION. For some high temperature applications,
a shaft cooling wheel is factory installed. LUBRICATION OF ANTI-FRICTION
Bearings on high speed fans tend to run Fan maintenance may require the cooling BEARINGS
hot: 75°F to 100°F above ambient. Do not wheel to be removed. Be certain to
replace a bearing because it feels to hot reassemble the cooling wheel with the Bearings on assembled fans receive
to touch. Place a contact thermometer fins towards the bearings. Reversing their initial lubrication from the bearing
against the bearing pillow block and check the assembly will heat rather than cool manufacturer. Bearings shipped separate
the temperature. Before you investigate the shaft. Mark one side of the split in from the fan or as a replacement may not
high temperature, realize that ball or the cooling wheel and match mark the be lubricated before shipment. When there
roller bearing pillow blocks can have a shaft so that the cooling wheel can be is the slightest doubt, the safe practice is
total temperature of 225°F (107°C). High repositioned on the shaft where it was to assume that the bearing has not been
temperature bearings are rated at 425°F originally installed. Changing the angular lubricated. Always turn fan off before
(218°C). position of the cooling wheel on the shaft lubricating.
Foundation bolts and all set screws should will affect the dynamic balance of the fan. For grease lubricated ball or roller bearing
pillow block, a good grade of grease, free
be inspected for tightness. LUBRICATION LINES - PLASTIC OR from chemically or mechanically active
Fans should be inspected for wear and COPPER material should be used. These greases
dirt periodically. Any dirt accumulated in Lubrication lines installed at the factory are a mixture of lubricating oil and a soap
housing should be removed. The impeller are not filled with grease at the factory. base to keep the oil in suspension. They
may have to be cleaned. A wash down Caution must be used when first greasing have an upper temperature limit where
with steam or water jet is usually sufficient, the bearings to purge air from the lines oil and soap base oxidize and thermally
covering bearings so water will not enter without blowing bearing seals or over- decompose into a gummy sludge.
the pillow blocks. Impellers having worn greasing a bearing.
blades should be replaced. Impellers Mixing of different lubricants is not
require careful rebalancing before ADJUSTABLE MOTOR BASE recommended. If it is necessary to change
being returned to service. Replacement Belt drives can be aligned and adjusted to a different grade, make or type of
impellers should have the balance by loosening clamping bolts and sliding lubricant, flush bearing thoroughly before
checked upon start-up and corrected as motor axially and retightening. Belt tension changing. Regreasing will vary from 3
required to operate properly in it's specific can be fine tuned adjusted by loosening months to a year depending on the hours
application. or tightening the adjustment bolts. Loosen of operation, temperature and surrounding
conditions. Special greases may be
Repairing of exterior and interior parts of clamping bolts first, then adjust adjusting required for a dirty or wet atmosphere
bolts and retighten clamping bolts. Belt
fans and ducts will extend the service life tension is adjusted with the adjusting bolts (consult your lubricant supplier).
of the installation. Select a paint which will and maintained with the clamping bolts. When grease is added, use caution to
withstand the operating temperatures. For prevent any dirt from entering the bearing.
normal temperatures a good machinery FAN MECHANICAL BALANCING The pipe plug or grease relief fitting should
paint may be used. Corrosive fumes Fan impellers are balanced statically and be open when greasing to allow excess
require all internal parts to be wire dynamically by the factory, but may require grease to flow out. The pillow block should
brushed, scraped clean and repainted further trim balancing. The final installed

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