IMI-34 - page 2

RECEIVING:
ChicagoBlowerCorporationequipment isprepared for shipment inaccordance
with theUniformFreight Classification. It is thoroughly inspected at the factory
and, barringdamage in transit, shouldbe ingood conditionuponarrival.
When a carrier signs Chicago Blower Corporation’s bill of lading, the
carrier accepts the responsibility
for any subsequent shortages or
damage evident or concealed, and
any claimmust bemade against the
carrier by the purchaser.
Evident shortage or
damage should be noted on
the carrierʼs delivery document
before signature of acceptance. Inspection
by the carrier of damage evident or concealed must be requested. After
inspection, issue a purchase order for necessary parts or arrange for return
of the equipment toChicagoBlower Corporation factory for repair.
Chicago Blower Corporation fans are shipped completely assembled and
skidded, and may be handled and moved using good rigging techniques,
being careful to avoid concentrated stresses that will distort any of the parts.
STORAGE:
If the fan is not to be installed promptly, store it in a dry location with the
bearings and the shaft protected against moisture, dust, corrosion and
physical damage. If the fan must be exposed to the elements, protect
against these elements with particular attention given to the bearings.
Keepbearings fully greased.
SAFETYPRECAUTIONS:
The fanwhich you have purchased is a rotating piece of equipment and can
become a source of danger to life or cause injury if not properly applied.The
maximumoperating temperature andspeed
for which this fan is designed
must not be exceeded
. These limits are given in our catalog, in the order
write-up, or onChicagoBlower Corporation drawings.
Personnel who will operate this fan, or those who will performmaintenance
thereon,
must begiven thisbulletin to readandwarnedof thepotential
hazards of this equipment.
Thispamphlet containsgeneral recommendations, but specific requirements
may apply to the individual installation. Such requirements are outlined
in federal, state and local safety codes. Strict compliance with these codes,
and strict adherence to these installation instructions are
the responsibility
of the user.
INSTALLATION:
1. Good results
require a proper foundation.
Foundations should be
level, rigid, and of sufficient mass for the equipment. Concrete is
preferable. Itsmassshouldbeat least four times the fanweight.Adequately
brace steel platforms in all directions. The minimum natural frequency
of any part must be at least 50% higher than the fan or driver
running speed.
2. Shim the fan support points before tightening foundation bolts. Do not
distort or twist the equipment.Make sure that the fan shaft is level.
3. ChicagoBlower requires that all appurtenances, includingductworkor stacks,
which are attached to the fan inlet or outlet, be independently supported,
unless prior approval has been obtained fromChicago Blower. Excess
dead loads or wind loads can distort the fan housing causing misalign-
ment and possible failure. Flexible connections are also necessary to
prevent duct expansion or movement fromadding loads to the fan.
V-BELTDRIVES:
1.Alignment of thedrivesmust becheckedwithastraightedgeor laser align-
er. Belt tensionmust be properly adjusted to assure good belt and bear-
ing life.Sheave facesshouldbeparallel andalignedwithin1/16".
Usebal-
anced sheaves.
2. All fan bearings have been selected for normal belt tension. Excess belt
tension can cause premature bearing failure on fan andmotor
3. It is normal onV-drives handlingmore than 20HP to “squeal” on start-up.
Do not tighten belts too tight.
Normal belt tension can be determined
by being able to depress belt, at mid-point a distance equal to one belt
width, with normal finger pressure.
4. Adjust belt tension by loosening the motor base side bolts and lifting or
lowering themotor top plate.Retighten side base bolts.
BEARINGS:
1. Lubricate fan bearings per instructions packed with the fan. For ball bear-
ingsuseShell AlvaniaEP2, and for roller bearingsuseTexicoMolytexEP2.
Lubricate the bearings immediately on receipt.
2.
Bearingsmust be properly locked to the shaft.
Check before operation.
Make sure bearing locking collar is in position and set screws tight. See
bearing instructions.
VERTICALOPERATION:
If the fan is tooperatewith itsshaft vertical, reset the fanbearingsas follows:
1. With the shaft vertical, unlock the drive end bearing set screws and turn
the shaft by hand. This allows the wheel end bearing to take the gravity
load of the shaft andwheel.
2. Re-lock the drive end bearing locking device and set screws so that this
bearing now takes just the belt pull.
OPERATIONOFFAN:
After installing the fan per these instructions and those of themanufacturers
of components,
make final safety checks
to prevent injury to personnel or
damage to the equipment.
1. Check bearings for alignment, proper lubrication, locking collars tight,
withwheel and inside of the housing clean and free of debris.
2. Check wheel position for proper clearance. A 3/16" to 5/8" radial gap is
satisfactory depending on the fan size.
3.Check all set screws and bolts for tightness.
4.Turn thewheel by hand to see that it rotates freely.
5. Start fan and allow unit to reach full speed, then shut down. During this
short period, check for vibrationor anyunusual noise. If anyareobserved,
locate the cause and correct.
6. The run-in period should be at least eight hours. Check bearings a
minimumof once each hour during this period. Overgreasing may cause
bearings to heat up. There need be no concern if the bare hand can be
held on the bearings briefly. Bearings will vent extra grease and cool
down after start-up.
7. Maximumambient or airstream temperature is 160°F.
MAXIMUMVIBRATIONLIMITS
VALUESSHOWNAREPEAKVELOCITY
INCHES/SEC. FILTEROUT
MAINTENANCE:
To insure long life and trouble-free service, frequently check all bearing
lubrication. See the bearingmanufacturer’s instructions packedwith the fan.
Should excessive vibration develop, check the following possibilities:
(1) Buildup of dirt or foreign matter on wheel; (2) Bolts on bearings,
housings, foundation and driver loose; (3)V-belt drive improperly aligned,
belts must have proper tension, sheaves must be balanced; (4) Check
bearing locking collars for tightness; (5) Checkwheel set screws; (6) Foreign
matter entered fan causing damage to wheel, shaft or bearings;
(7) Vibrationmay be coming froma source other than the fan.Stop the fan
and determine if the vibration still exists.Disconnect the driver from the fan
and operate it by itself to determine if it produces vibration; (8) Proper
clearance between thewheel and casing.
If the fan is to remain idle for an extended period, Protect the exposed
surfaces. Bearings should be protected in line with manufacturer’s
recommendations and the shaft should be rotatedmonthly.
RIGIDLYMOUNTED
FLEXIBLYMOUNTED
0.40
0.65
0.25
0.35
0.50
0.70
START-UP ALARM SHUTDOWN
IMI-34
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