2
1.0 Inspection
All equipment should be carefully inspected for damage when
received. Any shortage, damage, or breakage should be noted and a
claim filed immediately with the carrier. All AAF shipments are F.O.B.
factory.
2.0 Lifting
The Type K Exhauster is equipped with either lifting lugs or eyes. The
exhauster must NEVER be lifted by the shaft or housing. Caution
must be used during handling and mounting. Dropping the unit just a
few inches can imprint the bearing balls or rollers into the inner and
outer races. This will result in vibration and premature bearing failure.
3.0 Storage
Type K Exhausters should be stored in a dry, protected area where
bearings, wheels, fan shaft motors, and starters are not exposed to
moisture, dust, or corrosion. If it is necessary to store the unit
outdoors, special care should be taken to eliminate the accumulation
of moisture, dust, and corrosive materials and other contaminants.
The motor, bearings, and shaft should be covered with a protective
lubricant and/or weather resistant cover.
In addition, “Puddle Corrosion” may occur within a bearing when
water from moisture laden air comes in contact with the unprotected
steel surfaces of the bearing races. Water collects in voids caused by
the lubricant level dropping.
Grease-lubricated bearings should be re-lubricated upon arrival at the
storage site, and periodically during storage. The impeller should be
manually rotated and the bearings greased at frequent intervals,
depending on the environment, but normally every 4–6 weeks of the
storage period should be sufficient.
4.0 Installation
1. Remove any protective covering on the bearings and motor shaft,
and remove shipping skids.
2. The exhauster should be mounted on a flat, level, rigid foundation.
If vibration isolators are used, a sub-base must be used to support
the exhauster with the isolators located at each corner of the sub-
base. Connecting ductwork requires flexible connections when
vibration isolators are used.
3. Carefully line up unit with the anchor bolts in the foundation and
shim if necessary for leveling. Secure the exhauster in place by
tightening all nuts on anchor bolts.
Where ground support is not feasible, overhead support is possible.
The foundation can be hung from suspension rods, or, where
conditions permit, the exhauster can be rotated 180° and bolted.
However, the same precautions must be taken in order to ensure the
fan is level and securely fastened to the support.
4.1 Installation Procedures for Standard A, B, C, and D Section
V-Belt Drives*
Step 1: The K Exhauster is supplied with drives of various
manufacturers. Detailed installation instructions supplied by the
manufacturers are included in the instruction envelope.
Step 2: After placing the set of matched belts in the sheave grooves,
take up the slack in the belts and start the drive. Tension the drive
until the belts have only a slight bow in the slack side of the drive
while it is operating under load.
Step 3: Stop the drive and measure the belt span (see sketch on the
following page). Using a spring scale, apply a force to any one of the
belts in the center span. The force should be perpendicular to the
span and toward the center of the drive. easure the force required to
deflect any one of the belts 1/64 inch for every inch of span length. For
example, the deflection of a 32 inch span would be 1/64 inch multiplied
by 32, or 1/2inch.
Step 4: The amount of force required to deflect the belt should
compare with the recommended values listed in the table on the
following page. Initially, you should tighten the belts to the values
listed in Column A. There will normally be a drop in tension during the
first 24 to 48 hours of operation. During this “run-in” period, the belts
seat themselves in the sheave grooves, and the initial stretch is
removed. After a day or two, the drive should be stopped again and
another check made for the correct amount of tension. The tension
should now compare with the values in Column B. If the force is
below the low value in Column B, the belts are too loose and should
be tightened. If the force is greater than the high value in Column B,
the bolts should be loosened so that the force is between the high
and low value in Column B.
5.0 Operation Start Up
1. Insure wheel is tight on shaft and the foundation bolts, sheaves,
and bearings are secured.
2. Turn fan rotor manually to insure there is no rubbing or binding.
3. ake certain the rotation of the fan wheel is the same as that
indicated on the fan housing.
4. After exhauster has operated for a few hours, retighten all bolts.
5. V-belt drives should be checked to determine if proper alignment
and belt tension are correct. All V-belt drives require an initial run-in
period during which initial stretch is removed from the belt and
seating of the belts in grooves takes place. To compensate for this
loss in tension, the drive is installed with greater tension than
required for normal operation.
6. See planograph 88P-108381. Remove one for correct lubrication
system. After bearing equilibrium temperature has been reached,
adjust the lubrication system as required.
*For belts other than standard A, B, C or D section, see manufacturer’s
instructions included with drive.
