IMI-DC-37 - page 2

Chicago Blower Corporation equipment is prepared for shipment
in accordance with the Uniform Freight Classification. It is
thoroughly inspected at the factory, has usually been run tested,
and, barring damage in transit, should be in perfect condition.
When a carrier signs the Chicago Blower Corporation’s bill of
lading, the
carrier accepts the responsibility
for any subsequent
shortages or damageevident or concealed, and
anyclaimmust be
made against the carrier by the purchaser.
Evident shortage or
damage should be noted on the carrier’s 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 toCBC factory for repair.
Chicago Blower Corporation Design 37 fans are shipped com-
pletely assembled. These units may be handled and moved using
good rigging techniques, being careful to avoid concentrated
stresses that will distort any of the parts.
If the fan is not to be installed promptly, store in a dry place with
the motor and wheel protected against moisture, dust, corrosion
and physical damage. Contact the Motor manufacturer for special
instructions. For extended periods call Chicago Blower for instruc-
The fan which 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
maximum operating temperature
for which
this fan isdesigned
must not beexceeded
.These limitsaregiven in
our catalog, in the order write-up, or onChicago Blower Corporation
Personnel who will operate this fan, or those who will perform
maintenance thereon,
must be given this bulletin to read and
warnedof the potential hazards of this equipment.
This pamphlet contains general recommendations, but specific
requirements may apply to the individual installation. Such re-
quirements 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.
The environment unique to your installation will determine if
blade and/or motor guards are required - therefore all guards are
available as optional accessories.
1.Good results
require proper mounting
. The support structure
should be rigid, and of sufficient mass for the equipment.
2.Shim the fan support points before tighteningmounting bolts. Do
not distort or twist the equipment.
3.Make sure the power is locked “OFF”.
4.Checkwheel-to-housing clearance tomake sure it has not shifted
duringshipment or handling.Thereshouldbeapproximatelyequal
blade tipclearanceall around.Rotatewheel byhand tocheck that
it runs free.
If the wheel is striking, correct it by loosening the motor
support bolts and recentering thewheel to the “eye” of the orifice
so it does not hit. Retighten all set screws and bolts and test for
clearance again.
5.Check motor wiring and fusing in accordance with the National
Electrical Code and local requirements. Followwiring diagramon
themotor nameplate.
6.Chicago Blower requires that all appurtenances, including duct-
work or stacks, which are attached to the fan inlet or outlet, be
independently supported, unlessprior approval hasbeenobtained
fromChicago Blower. Excess dead loads or wind loads can dis-
tort the fan housing causing misalignment and possible failure.
Flexibleconnectionsarealsonecessary toprevent duct expansion
or movement fromadding loads to the fan.
After installing the fan per these instructions and those of the
manufacturers of components,
make final safety checks
to prevent
injury to personnel or damage to the equipment.
1. Be sure all personnel are well clear of the fan so that extremities
or clothingwill not be pulled into the rotor.
2.Make sure the wheel track and any ductwork is clean and free of
3.Bumpstart the fan tocheckproper rotationwhich isdeterminedby
the rotation arrowmolded on each blade. If thewheel turns in the
wrong rotation, reverse motor rotator per the motor instructions,
usually by interchanging any two leads on a three phasemotor.
4.Start andallowunit to reach full speed, thenshut down.During this
short period, check for vibration, anyunusual noise, or overheating
of the motor, and that the airflow direction is correct. Check the
motor amps drawn against the nameplate rating.
5. After the trial run lock the power “OFF”.
6. Recheck tightness of hold-down bolts, all set screws and keys,
and retighten if necessary. Recheck again after 8 and 24 hours of
actual operation.
7. The run-in period should be at least eight hours. Check themotor
bearings andmotor heating aminimumof once each hour. Do not
overgrease motor bearings. Relubricate per motor manufacturer’s
8.When Design 37 fans are furnished with adjustable pitch pro-
pellers, a POWERSET pitch setting card is included. See the
POWERSET card for instructions on changing the propeller blade
pitch setting.
Should excessive vibration or motor temperature later develop,
check the following possibilities: (1) Buildup of dirt or foreign
matter onwheel; (2) Bolts onmotor or fan housing foundation loose;
(3) The wheel eroding or corroding; (4) Wheel set screws loose;
(5) Vibration coming from source other than the fan; (6) Foundation
settled; (7) Clearance betweenwheel and housing has changed and
wheel is hitting.
If the fan is to remain idle for an extended period, protect motor and
exposedsurfaces.Follow themotormanufacturer’s recommendations
for storage and rotate the shaft by hand several revolutions each
The warranty on Chicago Blower fans is our standard warranty. The
warranty on themotor is that extended by themotor manufacturer.
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