Chicago Blower Corporation equipment is prepared for shipment in
accordance with the Uniform Freight Classification. It is thoroughly
inspected at the factory and, barring damage in transit, should be in good
condition upon arrival.
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 claim must be made against
the carrier by the purchaser.
Evident shortage or
damage should be
noted on the carrier’s delivery document
before signature of accep-
tance. 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 to Chicago Blower Corporation
factory for repair.
Chicago Blower fans are shipped skidded and may be handled and
moved using good rigging techniques, being careful to avoid concentrated
stresses that distort any of the parts.
If the fan is not to be installed promptly, store it in a dry place with the
motor and wheel protected against moisture, dust, corrosion and physi-
cal damage. If the unit must be exposed to weather, contact the Motor
manufacturer for special instructions. For long extended storage periods
call Chicago Blower for instructions.
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
maximum operating temperature
for which this
fan is designed
must not be exceeded.
These limits are given in our
catalog or on Chicago Blower Corporation drawings.Typically the airstream
temperature must not exceed 150°F., but with special consideration of
motor selection, may be able to operate up to 200°F
Personnel who will operate this fan, or those who will perform maintenance
must be given this bulletin to read and warned of the poten-
tial hazards of this equipment.
This pamphlet contains general recommendations, but specific require-
ments may apply to the individual installation. Such requirements are out-
lined in federal, state and local safety codes. Strict compliance with these
codes, and strict adherence to these installation instructions
responsibility of the user.
1. Good results
require a proper foundation.
Foundations should be
level, rigid, and of sufficient mass for the equipment. Concrete
is preferable. Its mass should be at least four times the fan weight.
Adequately brace steel platforms in all directions. The minimum natur-
al frequency of any part must be at least 50% higher than the fan
2. Shim the fan support points before tightening foundation bolts. Do not
distort or twist the equipment. Duct connections should be smooth
and straight. Elbows and other transitions should be located at least
five wheel diameters from fan inlet. Flexible connections should be
used at inlet and discharge. The fan should never support or restrain
any duct weight or force.
3. Make sure the power is locked “OFF”.
4. Check wheel-to-inlet clearance to make sure it has not shifted during
shipment or handling. There should be approximately equal axial
clearance all around and maintain an overlap of the inlet cone and
wheel. See Detail. Add “A” to the measured blade tip width for proper
set-up of inlet cone to inside of backplate. Rotate wheel by hand to
check that it runs free.
OPERATION OF FAN:
After installing the fan per these instructions and the instructions of the
manufacturers, make final safety checks to prevent injury to personnel or
damage to the equipment.
Always block rotating parts to prevent
windmilling while inspecting the fan.
1. Lock power source in “OFF” position
2. Make sure the wheel inside of the fan housing and any ductwork is
clean and free of debris.
3. If fan is equipped with optional Inlet Vane Control (IVC), check IVC
handle location. See Detail. Handle may have been rotated out of posi-
tion for shipping purposes. Loosen locknut, rotate handle to position
shown on assembly drawing and tighten locknut.
Note: The pivot bolt
must be installed to allow free movement of the IVC operating han-
Note: Manual operation has an additional wing nut that must
be positioned and tightened also.
4. Unblock rotating parts and turn the wheel by hand to
it rotates freely.
5. Start (bump) fan to check for proper rotation. Rotation is viewed
from the drive side (or behind the motor on A/4 fans). If the wheel
turns in the wrong direction, reverse motor rotation per motor instruc-
tions – usually by interchanging any two leads on a three phase
6. Start fan and allow unit to reach full speed, then shut down. During
this short period, check for excessive vibration, any unusual noise, or
overheating of the motor. Check the motor amps drawn against the
nameplate rating. A plate over the fan inlet will limit the horsepower
drawn during a test run with limited ductwork.
7. After the trial run lock the power “OFF”.
8. Recheck for tightness of hold-down bolts, wheel set screws and
keys, and retighten if necessary. Recheck after eight hours and again
after twenty-four hours of operation.
PACKAGED FORCED DRAFT and CUSTOM FANS