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TCF&B ES-52
port the shaft or the wheel on housing sides. Use only the
key provided with the shaft and wheel.
Wheels shipped separately can be lifted by slings running
through the blades and around the hub. Never lift the wheel
by blades or flanges. Always transport wheels by lifting. Do
not roll the wheel as this can damage coatings and change
the balance of the wheel.
Bent shafting is a source of vibration and bearing failure,
so handle the shaft with care. Any scratches on the shaft
may be removed with fine emery cloth or a stone.
Short Term Storage
If fan installation is to be delayed, store the unit in a pro-
tected area. Protect the fan and motor bearings from mois-
ture and vibration (or shock loading).
Long Term Storage
Prior to Storage — Fan bearings (and motor bearings per
the motor manufacturer’s specifications) are to be greased
at the beginning of extended storage. On belt driven units
the belt tension should be reduced to less than half the
specified value for the fan’s design to prevent a sag/set from
forming in the shafts and belts. If the unit was supplied with
a motor the motor windings should be meggered at this time
and recorded for comparison prior to placing in service. If
the fan housing was supplied with a drain connection, this
plug should be removed to prevent moisture from accumu-
lating in this portion of the unit during storage.
Storage — Fans should be stored indoors whenever possi-
ble where control over temperature, shock and dust is rea-
sonably maintained. If the unit is to be stored outside in the
elements, it should be covered with a water resistant mate-
rial. The bearings should be shielded individually from water
and dirt; however, do not tightly seal them to avoid trapping
condensation. Stored equipment should be housed on a
clean, dry floor or blocked up off the ground to prevent units
from sitting in any water or on the ground. If shock or vibra-
tion will be present during storage the unit may need to be
placed on some type of vibration dampening material to aid
in preventing brinelling of the bearing surfaces.
Periodic Check — On a monthly interval the equipment
should be checked to ensure that it has remained in an
acceptable stored condition. The fan (and motor if supplied)
should be rotated several times while adding enough grease
to replenish the bearing surfaces with fresh grease or to
maintain a full bearing cavity. Grease used must be com-
patible with that already supplied in the motor and fan bear-
ings. The fan impeller should be left at approximately 180
degrees from that of the previous month to prevent the shaft
and impeller from taking a set in one position. Storage
records should be maintained which indicate the above
requirements have been followed. Consult the motor manu-
facturer for proper storage, space heater connection and
lubrication if the unit was supplied with one.
Startup — When the unit is removed from storage all the
bearing grease should be purged and replenished with fresh
grease per lubrication decal. The motor should be meg-
gered to verify that the resistance is still at a satisfactory
level compared to the value recorded prior to storage.
Foundations and Supporting Structures
Floor mounted fans should be installed on a flat, level, rigid
concrete foundation with a mass at least three times that of
the assembly supported. The plan area should be no more
than twice that required by the equipment. Foundations with
larger areas should have correspondingly larger mass.
Anchor bolts should be “L” or “T” shaped with sufficient
length for nuts, washers, shims, and threads for draw-down.
Each bolt should be placed in a sleeve or pipe with a diam-
eter larger than the bolt to allow for adjustment.
Fans mounted to or within a structure should be placed
as close as possible to a rigid member such as a wall or col-
umn. The structure must be designed for rotating equip-
ment; static design for strength is not sufficient to insure
proper operation. Supports for suspended fans must be
cross-braced to prevent side sway. Structural resonance
should be at least 20% from fan operating speed. Vibration
isolators should be used where applicable.
Any ducting should have independent support; do not
use the fan to support ducting. Isolating the fan from duct-
work with flex connections eliminates transmission of vibra-
tion. Fans handling hot gases require expansion joints at
both the inlet and discharge to prevent excessive loads
caused by thermal growth.
Fan Installation, Factory Assembled Units
Follow proper handling instructions given earlier.
1. Move the fan to the final mounting position.
2. Remove skid, crates, and packing materials carefully.
3. If supplied, place vibration pads or isolation base on
mounting bolts. Line up holes in fan base with bolts.
4. Place fan on mounting structure. Carefully level unit using
shims as required at all mounting hole locations. Bolt
down the unit.
5. Any grout may now be used. Bolt the fan in position
before applying grout. Do not depend upon grout to sup-
port rotating equipment.
6. Continue with Operations Checklist.
Additional instructions may be given for some fan models,
components and accessories in the appendix.
Fan Installation – Disassembled Units
A unit is considered “disassembled” if any component
required for proper operation is shipped or supplied sepa-
rately or in pieces. Reference earlier instructions concerning
proper handling of fan components.
Instructions for Mounting and Assembly of Unit:
1. Move lower housing/framework to mounting location.
2. If vibration pads or bases are used, place on bolts first.
Place lower housing assembly onto bolts.
3. Level and shim if required. Bolt into place.
4. If separated pedestal or bearing pedestal:
a. Bring bearing pedestal to desired location.
b. Place any vibration base or pads into place. Set bear-
ing pedestal on bolts.
c. Never distort bearing pedestal by forcing it to align
with a non-level surface. Shim beneath the pedestals
as required.
d. Check bearing centerline height. Change centerline
height to match centerline height of housing. High tem-
perature units may require the housing centerline to be
lower when cold so that it will be centered when hot.
e. Measure from housing to bearing pedestal to bring
bearing pedestal into square with housing (a large
square may also suffice).
f. Bolt into position.
5. Shaft and wheel assembly preparation:
a. Clean protective coating off shaft with solvent. Do
