Cincinnati Fan PB Guide

OMM-23-1009-page 1
Installation, Safety, Operation & Maintenance Instructions And Parts List
For Models PB, PBS, SPB and LM.
Arrangement 4D Double Blowers
All Cincinnati Fan products are packaged to minimize any damage during shipment. The freight carrier is responsible
for delivering all items in their original condition as received from Cincinnati Fan. The individual receiving this equipment
is responsible for inspecting this unit for any obvious or concealed damage. If any damage is found, it should be noted
on the bill of lading before the freight is accepted and the receiver must file a claim with the freight carrier.
ATTENTION: RECEIVING DEPARTMENT
READ ENTIRE MANUAL, INCLUDING “SECTION IV. INITIAL UNIT STARTUP” BEFORE
ATTEMPTING TO INSTALL AND OPERATE THIS EQUIPMENT.
NOTE
This blower has a unique design in that it has a blower housing and wheel assembly mounted to both ends of the motor. The instruc-
tions contained in this manual pertain to both blowers mounted on either side of the motor. The blower housings, wheels, inlets and
discharges can be the same or different as required by the application. Make sure you follow all instructions for both blower assem-
blies. If you need to order any replacement parts, special instructions may be required.
NOTICE
LONG TERM STORAGE NOTICE
If this blower will NOT be installed and put into operation within 30 days, refer to the “Long Term Storage
Instructions” on pages 12 and 13. Failure to follow all applicable long term storage instructions, will void your
warranty. This blower should be stored indoors in a clean, dry location.
BLOWER SERIAL NUMBER: ________________________ MFG. DATE: ____________________
NOTE: The serial number above is a required reference for any assistance. It is stamped on the blower nameplate.
BLOWER SPECIFICATIONS:
Model: ________ Arrangement: ________
BLOWER PERFORMANCE DATA: (If entered on order)
CFM: ________ SP: ________ (Inches of Water Gauge) Motor BHP: ________
Density: ________ Altitude: ________ (Ft. above S. .) Airstream Temperature: ________°F.
Fan RPM: ________ Maximum Safe Fan RPM: ____________ DO NOT EXCEED THIS RPM
MOTOR DATA: (This section is completed only if the motor was supplied by Cincinnati Fan)
HP: __________ RPM: ____________ Voltage: ______________________________ Phase:________
Hz: ___________ Frame Size: ___________ Enclosure: ____________ Efficiency: ____________
IF Motor is EXP, Class(es) & Group(s) are:_________________________
Manufacturers Model Number: ___________________________ CFV Part Number: ___________
BLOWER SPECIFICATIONS
Form: OMM-23-1009
Effective: 10/30/09
Part No.: 01249

DANGER
OMM-23-1009-page 2
TABLE OF CONTENTS
Hazardous voltage High speed rotating ock out/Tag out to Avoid injury. NEVER Avoid injury. You MUST
can cause electrical equipment can cause prevent personal injury operate without A read and understand all
shock and death. severe personal injury. BEFORE starting ANY required safety instructions in this manual
service or inspection. guards in place. BEFORE installing.
I. GENERAL
A. Unpacking and Handling .............................2
B. Safety Accessories & Instructions............2-3
II. INSTALLATION
A. Vibration.......................................................3
B. Mounting Methods....................................3-4
C. Duct Work Connections...............................4
D. Safety Guards..............................................4
E. Dampers and Valves....................................4
F. Set Screw & Taper-lock Bushing
Torque Values ..............................................5
III. ELECTRICAL
A. Disconnect Switches ...................................5
B. Motors.......................................................5-6
C. Maximum Blower Speed..............................6
IV. INITIAL UNIT STARTUP
A. Pre-Startup & Post-Startup Checks.............7
B. Vibration....................................................8-9
V. ROUTINE INSPECTION & MAINTENANCE .....9
A. Hardware ...................................................10
B. Motor Bearing ubrication .........................10
C. Wheel Balance ..........................................10
D. Vibration.....................................................10
E. Dampers and Valves..................................10
F. Safety Equipment or Accessories .........10-11
VI. ORDERING PARTS .........................................11
VII. TROUBLESHOOTING ................................11-12
VIII. LONG TERM STORAGE ............................12-13
IX. WARRANTY, LIABILITY & RETURNS............14
X. PARTS DRAWING ...........................................15
I. GENERAL
A. Unpacking:
Be careful not to damage or deform any parts of the blower when removing it from the packaging container. All the
packaging material should be kept in the event the blower needs to be returned.
Handling:
Handling of the blower should be performed by trained personnel and be consistent with all safe handling practices.
Verify that all lifting equipment is in good operating condition and has the proper lifting capacity. The blower should
be lifted using well-padded chains, cables or lifting straps with spreader bars. Some blower models have lifting eye
locations provided in the blower base. NEVER lift the blower by an inlet or discharge flange, motor shaft,
motor eye bolt, or any other part of the blower assembly that could cause distortion of the blower
assembly.
B. Safety Instructions & Accessories:
1. Safety Instructions:
All installers, operators and maintenance personnel should read AMCA Publication 410-96, “Recommended Safety
Practices for Users and Installers of Industrial and Commercial Fans”. This manual is included with the blower.
Additional copies can be requested by writing us at Cincinnati Fan, 7697 Snider Rd., Mason, OH 45040-9135
2. Sound:
Some blowers can generate sound that could be hazardous to personnel. It is the responsibility of the user to measure
the sound levels of the blower and/or system, determine the degree of personnel exposure, and comply with all appli-
cable safety laws and requirements to protect personnel from excessive noise.

OMM-23-1009-page 3
3. Air Pressure and Suction:
In addition to the normal dangers of rotating machinery, the blower can present additional hazards from the suction or
pressure created at the blower inlet or discharge. Suction at the blower inlet can draw materials into the blower where
they become high velocity projectiles at the discharge and cause severe personal injury or death. It can also be
extremely dangerous to persons in close proximity to the inlet or discharge as the forces involved can overcome the
strength of most individuals.
NEVER OPERATE A BLOWER WITH A NON-DUCTED INLET AND/OR DISCHARGE. IF THE BLOWER INLET
AND/OR DISCHARGE IS NON-DUCTED, IT IS THE USERS RESPONSIBILITY TO INSTALL AN
INLET AND/OR DISCHARGE GUARD.
NO GUARANTEE OF ANY LEVEL OF SPAR RESISTANCE IS IMPLIED BY SPAR RESISTANT
CONSTRUCTION. IT HAS BEEN DEMONSTRATED THAT ALUMINUM IMPELLERS RUBBING ON RUSTY
STEEL CAN CAUSE HIGH INTENSITY SPAR S. AIR STREAM MATERIAL AND DEBRIS OR OTHER SYSTEM
FACTORS CAN ALSO CAUSE SPAR S.
4. Temperature:
Many blowers, blower components and all motors operate at temperatures that could burn someone if they come in
contact with them. If this potential hazard could exist in your installation, steps must be taken by the user to protect any-
one from coming in contact with this equipment.
5. Spark Resistance; (Per AMCA Standard 99-0401-86 and ISO 13499)
6. Safety Accessories;
Guards:
All moving parts must be guarded to protect personnel. Safety requirements can vary, so the number and types of
guards required to meet company, local, state and OSHA regulations must be determined and specified by the actual
user or operator of the equipment.
NEVER start any blower without having all required safety guards properly installed. All blowers should be
checked on a regular schedule, for missing or damaged guards. If any required guards are found to be missing
or defective, the power to the blower should be immediately turned off and locked out in accordance with
OSHA regulations. Power to the blower should NOT be tuned back on until the required guards have been
repaired or replaced.
This blower can become dangerous due to a potential “windmill” effect, even though all electrical power has been
turned off or disconnected. The blower wheel should be carefully secured to prevent any rotational turning BEFORE
working on any parts of the blower/motor assembly that could move.
7. Access or Inspection Doors:
II. INSTALLATION
A. Vibration:
Before any mounting method is selected, the user should be aware of the effects vibration will have on the blower,
motor and other parts. Improper blower installation can cause excessive vibration causing premature wheel and/or
motor bearing failure, that is not covered under warranty. Vibration eliminator pads, springs or bases should be properly
installed to prevent any blower vibration from transmitting to the foundation, support structure or ducting.
B. Mounting Methods:
1. Floor Mounted Units;
Centrifugal blowers should be mounted on a flat, level, concrete foundation weighing 2-3 times the weight of the com-
plete blower/motor assembly. It is recommended that the foundation be at least 6 inches larger than the base of the
blower. The foundation should include anchor bolts such as shown in Fig. 1 on page 4. Place the blower over the
anchor bolts and shim under each bolt until the blower is level. After shimming, flat washers, lock washers and lock nuts
should be tightened at each anchor bolt. Any gaps between the blower base and the foundation should be grouted. If
the blower will be sitting on some type of vibration pads or mounts, follow the recommended mounting procedures
supplied with the vibration elimination equipment.
WARNING
DANGER
I
SHUT THE BLOWER DOWN IMMEDIATELY IF THERE IS ANY SUDDEN INCREASE IN VIBRATION.
WARNING
NEVER OPEN ANY ACCESS OR INSPECTION DOORS WHILE THE BLOWER IS OPERATING. SERIOUS INJURY OR
DEATH COULD RESULT FROM THE AFFECTS OF AIR PRESSURE, AIR SUCTION OR MATERIAL THAT IS BEING
CONVEYED. DISCONNECT OR LOC OUT POWER TO THE BLOWER AND LET THE BLOWER WHEEL COME TO A
COMPLETE STOP BEFORE OPENING ANY TYPE OF ACCESS OR INSPECTION DOOR.
DANGER

2. Elevated Units;
Improper mounting of elevated blowers can cause vibration problems. The structure that the blower/motor assembly will
be mounted on must be strong enough to support at least 3 times the weight of the entire blower/motor assembly. An
insufficient support will cause excessive vibration and lead to premature wheel and/or motor bearing failure.
Bracing of the support structure must be sufficient enough to prevent any side sway. The entire structure should be weld-
ed at all connection joints to maintain constant alignment of the platform.
OMM-23-1009-page 4
THE IMPROPER DESIGN OF AN ELEVATED PLATFORM STRUCTURE COULD RESULT IN A RESONANT
CONDITION, AND CONSEQUENTLY, CAUSE A LIFE THREATENING, CATASTROPHIC, STRUCTURAL FAILURE.
C. Duct Work Connections:
All duct connections to the blower should include flexible connectors between the ducting and the blower inlet and/or dis-
charge. This will eliminate distortion, noise and vibration from transmitting to the duct and building. The connectors
should be selected to handle the operating conditions for air volume and pressure that the blower will produce. All duct-
ing or accessories, added by the user, should be independently supported. DO NOT use the blower/motor
assembly to support any additional weight. Inlet and/or discharge duct elbows should be located a minimum of 2
blower wheel diameters from the blower. Any duct elbows located closer than 2 wheel diameters to the blower inlet or
discharge WILL reduce the air performance and blower efficiency. Any duct elbows near the blower discharge should be
in the same rotational direction as the blower rotation.
Non-Ducted Blower Inlet:
Any blower with no ducting on the inlet must have an inlet guard. The blower should be located so the blower inlet is, at
least, 1 wheel diameter away from any wall or bulkhead to eliminate a reduction in air flow.
Non-Ducted Blower Discharge:
Any blower with no ducting on the discharge must have a discharge guard.
D. Safety Guards:
Cincinnati Fan offers guards, as optional, to keep your blower in compliance with OSHA safety regulations. These include
inlet or discharge guards. Any blowers built with high temperature construction, a “heat slinger guard” is standard. It is
the responsibility of the user to make sure this blower meets all local, state and OSHA safety regulations. If you have a
specific guard requirement not covered by OSHA, please contact the local Cincinnati Fan sales office for assistance.
E. Dampers and Valves: (Airflow control devices)
If the blower is supplied with any type of air flow control device, it should be closed before initial start-up of the blower to
minimize overloading of the motor. Any airflow control device, with bearings, should be maintained in accordance with
the manufacturers instructions. Any air flow control device, with an automatic control mechanism, should be adjusted per
the manufacturers recommendations.
Fig. 1
DANGER

OMM-23-1009-page 5
F. Set Screw and Taper-lock Bushing Torque Values:
All blower wheel set screws are tightened to the proper torque prior to shipment. Some wheels may have taper-lock
hubs and split, taper-lock bushings to secure the wheel to the motor shaft.
NOTE: Check all set screw or taper-lock bushing torques. Forces encountered during shipment, handling, rigging
and temperature can affect factory settings. For correct torque values, see Tables 1 and 2below.
Set screws should NEVER be used more than once. If the set screws are loosened, they MUST be replaced.
Use only knurled, cup-point, set screws with a nylon locking patch.
CAUTION
ALL WIRING CONNECTIONS, INSPECTION AND MAINTENANCE OF ANY MOTOR MUST BE PERFORMED BY A
LICENSED ELECTRICIAN IN ACCORDANCE WITH THE MOTOR MANUFACTURERS RECOMMENDATIONS, ALL
ELECTRICAL CODES AND OSHA REGULATIONS. FAILURE TO PROPERLY INSTALL, MA E WIRING
CONNECTIONS, INSPECT OR PERFORM ANY MAINTENANCE TO A MOTOR CAN RESULT IN
MOTOR FAILURE, PROPERTY DAMAGE, EXPLOSION, ELECTRICAL SHOC AND DEATH.
DANGER
III. ELECTRICAL
A. Disconnect Switches:
All blower motors should have an independent disconnect switch located in close visual proximity to turn off the elec-
trical service to the blower motor. Disconnects must be locked out in accordance with OSHA “lock out-tag out”
procedures any time inspection or maintenance is being performed on the blower and/or motor assembly.
The “lock out-tag out” procedure should be performed by a licensed electrician or authorized personnel.
All disconnects should be sized in accordance with the latest NEC codes (National Electric Codes) and any local
codes and should be installed only by a licensed electrician. “Slow blow” or “time delay” fuses or breakers should be
used since the initial start-up time for the blower motor, although rare, can be up to 10 seconds.
B. Motors:
1. DO NOT connect or operate a motor without reading the motor manufacturers instructions supplied with
the blower. The basic principle of motor maintenance is: EEP THE MOTOR CLEAN AND DRY. This requires
periodic inspections of the motor. The frequency of the inspections depends on the type of motor, the service and
environment it will be subjected to and the motor manufacturers instructions.
2. Cleaning: Cleaning should be limited to exterior surfaces only. Follow motor manufacturers cleaning instruc-
tions.
3. Lubrication: Most small motors have sealed bearings that are permanently lubricated for the life of the motor.
Some larger motors have grease plugs that should be replaced with grease fittings to perform re-lubrication.
These motors, or any motor with grease fittings, should be lubricated in accordance with the motor manufacturers
recommendations. ubrication frequency depends on the motor horsepower, speed and service. BE SURE you
use compatible grease and DO NOT over grease.
4. Location: If the motor will be outside and subjected to the weather, it is recommended that a weather cover be
installed to keep rain and snow off of the motor. No motors are guaranteed to be “watertight”. Be careful to allow
enough openings between the motor and the motor cover to let the motor ”breath”. If the back end of the motor is
covered, the cover should be no closer than 3” to the back of the motor for proper ventilation.
SET SCREW TORQUE VALUES TORQUE VALUES FOR
TAPER-LOCK BUSHINGS
Diameter & Number
of Treads/Inch
Hex Wrence Size
(Across Flats)
Required Torque
(Inch Pounds)
1/4-20
5/16-18
3/8-16
7/16-14
1/2-13
5/8-11
1/8”
5/32”
3/16”
7/32”
1/4”
5/16”
65
165
228
348
504
1104
Taper-lock
Bushing Size
Required Torque
(Inch Pounds)
H
B
P
Q
R
95
192
192
350
350
Table 2Table 1

5. Wiring Connections: All wiring connections should be made for the proper voltage and phase as shown on the
motor nameplate. Connections should follow the motor manufacturers recommendations as shown on the wiring
schematic. This wiring diagram will be located on the outside of the motor, inside of the motor conduit box or on the
motor nameplate. Reversing some wires might be necessary to get the correct blower rotation.
6. Motors with Thermal Overload Protection: If a motor is equipped with thermal overloads, the thermal overload
must be wired per the wiring schematic to be operable. There are 3 types of thermal overloads:
a. Automatic: These will automatically shut the motor down if the internal temperature exceeds the design limits.
OMM-23-1009-page 6
MAKE SURE YOU LOCK OUT THE POWER TO THE MOTOR BEFORE INSPECTING ANY MOTOR WITH
AUTOMATIC THERMALS. WHEN THE THERMALS COOL DOWN, THEY WILL ALLOW THE MOTOR TO
AUTOMATICALLY START UP AGAIN, UNLESS YOU HAVE LOCKED OUT THE POWER TO THE MOTOR.
DANGER
b. Manual: These motors will have a button on them. If the motor overheats, it will shut down. After you have
inspected the motor and eliminated the over heating problem, you will need to “reset” it by pushing the button.
You should still lock out the power BEFORE inspecting the motor.
c. Thermostats: This type of thermal is a temperature sensing device ONLY. If the motor overheats, the thermo-
stats will open or close (depending on the type) and send a “signal” to the electrical box. THEY WILL NOT
TURN THE MOTOR OFF. These are pilot circuit devices that must be connected to the magnetic starter
circuit.
7. EXPLOSION PROOF Motors: No motor is explosion proof. Explosion proof (EXP) motors are designed so if there is
an explosion WITHIN the motor, the explosion will be CONTAINED INSIDE the motor and not allowed to get out to
the atmosphere. All explosion proof motors must be selected based on the atmosphere and/or the environment the
motor will be operating in. Explosion proof motors are designed, rated, and labeled for their operating conditions
based on Classes, Groups and “T” Codes. The Class, Group and “T” Code of an EXP motor MUST be selected
based on the atmosphere and/or environmental conditions the motor will be operating in. Consult the NEC
(National Electric Code) and the NFPA (National Fire Protection Association) for the proper EXP motor
Class, Group and “T” Code required for your specific application and location.
NOTICE:
a. All EXP motors have some type of thermal overload as required by UL (Underwriters Laboratories).
Refer to all of Section 6 above.
b. All EXP motors are required to have the UL (Underwriters Laboratories) and CSA (Canadian Standards
Association) listing numbers on the motor name plate or on a separate plate attached to the motor. The
Class, Group and “T” Code the motor is designed for must also be listed.
8. Normal Motor Operating Temperatures:
Using your hand to test the normal running temperature of a motor can be a very painful experience;
The normal operating temperature of a fully loaded, open type, electric motor operating in a 70°F. (21° C.)
ambient temperature is 174°F. (79° C.)
C. Maximum Blower Speed and Motor Speed Controllers:
If you will be using any type of motor speed controller with this blower, DO NOT exceed the maximum safe blower
speed. Installing and using a speed control device requires special training and certification as required by the
speed control manufacturer. See the manufacturers instructions for proper use, installation and wiring connections
for the maximum speed settings. It may also be necessary to “block out” some speeds to eliminate a resonant vibra-
tion problem. The maximum safe blower speed is shown on the data sheet shipped with the blower. If you have lost
the data sheet, contact Cincinnati Fan or our sales office for your area. You must have the serial number from the
blower name plate for us to determine the maximum safe blower speed. Cincinnati Fan will only extend the motor
manufacturers warranty, when used with a speed controlling device, if the motor has the words “Inverter Duty”
marked on the motor name plate. If the motor does not have “Inverter Duty” marked on the motor name plate, and
you have a motor failure, you will be required to contact the motor manufacturer for any service or warranty claims.
IF AN EXPLOSION PROOF MOTOR IS USED IN AN AREA CONTAINING VOLITILE LIQUIDS, GASES,
FUMES OR DUST FOR WHICH THE MOTOR WAS NOT DESIGNED TO OPERATE IN, AN
EXPLOSION AND/OR FIRE CAN OCCUR.
DANGER

OMM-23-1009-page 7
IV. INITIAL UNIT STARTUP
A. Pre-Startup & Post-Startup Checks: (Check blocks as each step is completed. Retain this for your records.)
A1. Pre-Startup Checks Completed By: ___________________________________ DATE: ___________________
A2. 8 Hour, Post-Startup Checks Completed By: _______________________ DATE: ___________________
A3. 3 Day, Post-Startup Checks Completed By: _____________________ DATE: ___________________
MAKE SURE POWER TO THE MOTOR IS LOCKED OUT BEFORE STARTING PRE-STARTUP OR POST-STARTUP CHECKS.
1. ■
■■ ■■ ■If possible, CAREFULLY spin either blower wheel by hand to ensure it rotates freely and no rubbing or clicking noise
is heard.
2. ■
■■ ■■ ■Check all blower, foundation and duct work hardware to make sure it is tight.
3. ■
■■ ■■ ■Check all blower wheel set screws to make sure they are tight per Table 1 on page 5.
4. ■
■■ ■■ ■If the wheels have a taper-lock bushing, make sure the bolts are tightened per Table 2 on page 5.
5. ■
■■ ■■ ■Make certain there is no foreign material in the blower or duct work that can become a projectile.
6. ■
■■ ■■ ■Make sure any inspection doors in the duct work are securely bolted or locked.
7. ■
■■ ■■ ■Ensure all electrical power components are properly sized and matched for your electrical system.
8. ■
■■ ■■ ■Check that all required guards are properly secured.
9. ■
■■ ■■ ■Any dampers should be fully opened and closed to make sure there is no binding or interference.
10. ■
■■ ■■ ■If your blower is mounted on an elevated support structure, make sure the structure is welded at all the joint connec-
tions and the structure is properly braced to prevent “side sway”.
11. ■
■■ ■■ ■Close any dampers to minimize load on motor. Especially on blowers with high temperature construction. Never sub-
ject a “cold” blower to a “hot” gas stream. If the blower will be handling “hot gases” greater than 150°F (65°C) it is
imperative that the blower be subjected to a gradual rate of temperature increase, not to exceed 15°F/minute
(8°C/minute). The same temperature limits are also important when the blower is experiencing a drop in temperature
until the temperature drops down to 150°F (65°C). Only, when the entire blower has reached an equilibrium tempera-
ture of 150°F (65°C), or less, should the power be turned off.
12. ■
■■ ■■ ■Make sure the power source connections to the blower motor are per the motor manufacturers instructions.
13. ■
■■ ■■ ■Make sure the blower wheels are stationary prior to startup. Starting a blower with wheels that are rotating back-
wards can cause wheel damage.
14. ■
■■ ■■ ■Apply power to the blower motor momentarily (i.e. “bump start”) to check for proper blower wheel rotation. If the blow-
er is rotating in the wrong direction, reconnect the motor leads per the motor manufacturers wiring schematic. Blower
rotation is determined by viewing the blower from the motor side of the blower, NOT from the inlet side. After
reconnecting the leads, repeat this step. See Fig. 2 below.
NOTICE: Failure to complete and document all the following pre-startup and both post-startup
checks, listed in sections A (below) and B on page 8, could void all warranties.
15. ■
■■ ■■ ■Apply power to the blower motor and let it come up to full speed. Turn off the power. ook and listen for any unusual
noise or mechanical abnormality while the blower wheel is still spinning. If any are noticed, lock out the power, wait for
the blower wheel to come to a complete stop, locate the cause and correct it.
16. ■
■■ ■■ ■Unlock power and start the blower.
17. ■
■■ ■■ ■Measure, record and keep the following motor data for future reference and comparison:
(Single phase motors will only have L1 and L2 leads)
Amperage draw on each motor lead: L1 _______ L2 _______ L3 _______
(Running amps SHOULD NOT exceed the motor nameplate amps for the voltage being operated on)
Voltage coming to motor leads: L1_______ L2_______ L3_______
(Should be about the same input voltage on all leads)
Fig. 2
Clockwise
(CW) Rotation
Counter-Clockwise
(CCW) Rotation

VIBRATION METER PROBE POSITIONS
For Arrangement 4D Blowers
B. Vibration:
The blower was balanced at the factory to comply with ANSI/AMCA Standard 204-05, Category BV-2. However, rough
handling in shipment and/or erection, weak and/or non-rigid foundations, and misalignment may cause a vibration prob-
lem after installation. After installation, the vibration levels should be checked by personnel experienced with vibration
analysis and vibration analysis equipment.
NOTE:
The blower SHOULD NOT be operated if the vibration velocity of the fan exceeds 0.50 inches per second, filter
out, if the blower is rigidly mounted. If the blower is mounted on isolators or on an isolator base, it SHOULD
NOT be operated if the vibration velocity of the blower exceeds 0.75 inches per second, filter out.
Vibration readings for direct driven blowers should be taken on the motor at the top, sides and end as per Fig. 3 below.
After you have taken your vibration readings, write them down in the spaces below and keep for future comparison.
OMM-23-1009-page 8
If the blower is going to be conveying material, it is the users responsibility to periodically turn the blower off and
lock out the power. The blower wheel should then be checked for material build-up and/or erosion. If material has
built up on any parts of the wheel, it MUST be removed and cleaned before it is put back into service. If any parts
of the wheel have been eroded, the wheel MUST be replaced. Failure to perform this inspection can cause
excessive vibration that will damage the blower and/or motor bearings. When vibration becomes excessive, it will
lead to complete blower failure that could cause property damage, severe personal injury and death. The user
must determine the frequency of this inspection based on the actual circumstances of their operation, BUT
checking the vibration readings should NEVER exceed a 12 month period. For the AMCA/ANSI standard for
vibration limits, see Fig. 4 on page 9.
DANGER
Fig. 3

OMM-23-1009-page 9
Fig. 4 Vibration Severity Chart
BEFORE STARTING ANY INSPECTION OR MAINTENANCE, BE SURE BLOWER IS TURNED OFF, POWER IS LOC ED
OUT AND THE BLOWER WHEEL HAS BEEN CAREFULLY SECURED TO PREVENT WIND MILLING. IF THE
OPERATING CONDITIONS OF THE BLOWER ARE TO BE CHANGED (SPEED, PRESSURE, TEMPERATURE, ETC.)
CONSULT CINCINNATI FAN, OR OUR SALES OFFICE FOR YOUR TERRITORY, TO DETERMINE IF THE UNIT WILL
OPERATE SAFELY AT THE NEW CONDITIONS.
WARNING
V. ROUTINE INSPECTION & MAINTENANCE
Periodic inspection of all the blower parts is the key to good maintenance and trouble-free operation. The frequency of
inspections must be determined by the user and is dependent upon the severity of the application. BUT, it should
NEVER exceed a 12 month period. The user should prepare an inspection and maintenance schedule and make sure
it is adhered to.

A. Hardware:
All blower and foundation hardware should be checked to make sure it is tight. Wheel set screws or taper-lock bush-
ings should be tightened to the torque values shown in Tables 1 and 2 on page 5.
NOTE: If any set screws have come loose, they must be thrown away and replaced. NEVER use set screws more
than once. Replace with knurled, cup-point set screws with a nylon locking patch.
B. Motor Bearing Lubrication:
1. Motor Bearings:
Most smaller motors have sealed bearings that never require re-lubrication for the life of the motor. For any motors with
grease fittings, consult the motor manufacturers recommendations with reference to the lubrication frequency and the
type of grease that should be used.
DO NOT over grease the motor bearings. Generally, 1-2 shots should be enough. Use a hand operated grease gun at
no more than 40 PSI. IF POSSIBLE, CAREFULLY lubricate the motor bearings while the motor is running.
C. Wheel Balance:
All blower wheels are balanced at the factory. It is not uncommon that additional “trim balancing” is required after the
blower is assembled. Trim balancing of the blower assembly, in the field, is typically always necessary for all replace-
ment wheels. After any wheel is installed, the final balance of the entire blower assembly should be checked.
Refer to Section B on page 8 and Fig. 4 on page 9. Air stream material or chemicals can cause abrasion or corrosion
of the blower parts. This wear is generally uneven and, over time, will lead to the wheel becoming unbalanced, causing
excessive vibration. When that happens, the wheel must be rebalanced or replaced. The other air stream components
should also be inspected for wear or structural damage and cleaned or replaced if necessary. After cleaning any
blower wheel, it should be balanced and then “trim balanced” on the motor shaft.
There are three ways to balance a blower wheel:
1. Add balancing weights for fabricated aluminum, steel or stainless steel wheels:
Balance weights should be rigidly attached to the wheel at a location that will not interfere with the blower
housing nor disrupt air flow. They should (if at all possible) be welded to the wheel. When trim balancing the
wheel, on the blower, be sure to ground the welder directly to the blower wheel. Otherwise, the welding
current will likely pass through the motor and damage the motor bearings.
2. Grinding off material for cast aluminum wheels:
If you are grinding on the wheel to remove material, be very careful not to grind too much in one area. That
could affect the structural integrity of the wheel.
3. Forward curved wheels, Model LM only (also known as squirrel cage or multivane wheels).
These wheels have balancing clips attached to individual blades around the wheel. That is the only proper
way to balance this type of wheel.
NOTE:
Removing any forward curve wheel from the blower to clean it, requires special attention when reinstalling
the wheel back into the blower housing. Make sure you reinstall the wheel so the proper wheel-to-inlet
clearance is maintained. Failure to do this will affect the blowers airflow (CFM), static pressure (SP) capabil-
ities and efficiency. Consult Cincinnati Fan or our local sales office for your area for assistance if necessary.
D. Vibration:
As mentioned previously in this manual, excessive vibration can cause premature motor bearing failure that could lead
to catastrophic failure of the blower. After performing any routine maintenance, the vibration readings should be taken
again. New readings should be taken (maximum every 12 months) and compared to the readings you recorded in
Figure 3, on page 8, during the initial startup. If any major differences are present, the cause should be deter-
mined and corrected before the blower is put back into operation.
The most common causes of vibration problems are:
1. Wheel unbalance. 3. Poor blower inlet and/or discharge conditions.
2. Mechanical looseness. 4. Foundation stiffness.
E. Dampers and Valves: (Airflow control devices)
Turn off and lock out power to the blower motor. Any dampers or valves should be periodically inspected to make sure
all parts are still operable within their full range and there is no interference with any other damper or blower compo-
nents. Any bearings or seals should be checked for their proper function. The manufacturers maintenance instructions
should be followed.
F. Safety Equipment & Accessories:
It is the users responsibility to make sure that all safety guards required by the company, local, state and OSHA regu-
lations are properly attached and fully functional at all times. If any guards become defective or non-functional at any
time, the power to the blower MUST be turned off and locked out until complete repairs and/or replacements have
been made, installed and inspected by authorized personnel.
OMM-23-1009-page 10

OMM-23-1009-page 11
Any accessories used in conjunction with the blower should also be inspected to make sure they are functioning
within their intended limits and design specifications. The manufacturers maintenance manuals should be referred to
for correct maintenance procedures. These accessories include, but are not limited to, the following:
Shaft seals, inspection doors, vibration isolators or vibration bases, air flow or pressure measuring equipment,
hoods, controls, special coatings, silencers, expansion joints, valves, flexible connectors and filters.
VI. ORDERING REPLACEMENT PARTS:
Under normal conditions, you should not need any spare or replacement parts for at least 24 months after shipment
from Cincinnati Fan. That does not include any wear due to abrasion, corrosion, excessive temperatures, abuse, mis-
use, accident or any severe conditions the fan was not designed for.
NOTICE:
1. If this blower is vital to any process that could cost you lost revenue, we strongly recommend that you keep
a replacement blower wheel and motor at your location.
2. If this blower is vital for the safety of any people and/or animals, we strongly recommend that you keep a
complete blower/motor assembly, as originally ordered, at your location.
To order any parts or complete units, contact us for the name of our sales office for your area. Or you can find
them on our website at: www.cincinnatifan.com
WE MUST HAVE THE BLOWER SERIAL NUMBER FROM THE BLOWER NAME PLATE TO IDENTIFY PARTS CORRECTLY.
VII. TROUBLESHOOTING
Troubleshooting should only be performed by trained personnel. Any potential electrical problems should only
be checked by a licensed electrician. All safety rules, regulations and procedures MUST be followed. Failure to
follow proper procedures can cause property damage, severe bodily injury and death.
DANGER
PROBLEM CAUSE
Excessive Vibration 1.Loose mounting bolts, wheel set screws, taper-lock hubs.
2.Worn or corroded blower wheel.
3.Accumulation of foreign material on blower wheel.
4.Bent motor shaft.
5.Worn motor bearings.
6.Motor out of balance.
7.Inadequate structural support.
8.Support structure not sufficiently cross braced.
9.Weak or resonant foundation.
10.Foundation not flat and level.
Airflow (CFM) Too Low 1.Blower wheel turning in wrong direction (rotation).
2.Actual system static pressure (SP) is higher than expected.
3.Motor speed (RPM) too low.
4.Dampers or valves not adjusted properly.
5.Leaks or obstructions in duct work.
6.Filters dirty.
7.Inlet and/or discharge guards are clogged.
8.Duct elbow too close to blower inlet and/or discharge.
9.Improperly designed duct work
10.Blower wheel not properly located relative to the inlet bell (LM Model only).
Airflow (CFM) Too High 1.Actual system static pressure (SP) is lower than expected.
2.Motor speed (RPM) too high.
3.Filter not in place.
4.Dampers or valves not adjusted properly.
Potential problems and causes listed below are in no order of importance or priority. The causes are only a list
of the most common items to check to correct a problem. If you find the cause of a problem, DO NOT assume it is
the ONLY cause of that problem. Different problems can have the same causes.

VIII. LONG TERM STORAGE INSTRUCTIONS: (Storage exceeding 30 days after receipt of equipment)
NOTE: Failure to a here to these instructions voi s all warranties in their entirety.
1. Storage site selection:
a. evel, well-drained, firm surface, in clean, dry and warm location. Minimum temperature of 50°F (10°C).
b. Isolated from possibility of physical damage from construction vehicles, erection equipment, etc.
c. Accessible for periodical inspection and maintenance.
2. The blower should be supported under each corner of its base to allow it to “breath”. Supports (2 x 4’s, timbers, or
railroad ties) should be placed diagonally under each corner.
3. If the equipment is to be stored for more than three (3) months, the entire blower assembly must be loosely covered
with plastic, but not tightly wrapped.
4. Storage Maintenance:
A perio ic inspection an maintenance log, by ate an action taken, must be evelope an main-
taine for each blower. See example below. Each item must be checke monthly.
EXAMPLE:
Storage / Maintenance Schedule Log
OMM-23-1009-page 12
Long Term Storage instructions continued on page 13.

OMM-23-1009-page 13
5. General Motor Procedure:
If the motor is not put into service immediately, the motor must be stored in a clean, dry, warm location. Minimum
temperature of 50°F. (10°C,). Several precautionary steps must be performed to avoid motor damage during storage.
a. Use a “Megger” each month to ensure that integrity of the winding insulation has been maintained. Record the
Megger readings. Immediately investigate any significant drop in insulation resistance.
b. DO NOT lubricate the motor bearings during storage. Motor bearings are packed with grease at the factory.
c. If the storage location is damp or humid, the motor windings must be protected from moisture. This can be done
by applying power to the motor’s space heaters, (IF AVAI AB E) while the motor is in storage. If the motor does
not have space heaters, storing it in a damp or humid location will, very quickly, cause internal corrosion and
motor failure which is not warranted.
NOTE:
For specific storage instructions, for the actual motor and any accessory parts that were supplied, refer to
the manufacturer’s instructions.

IX. LIMITED WARRANTY:
Cincinnati Fan & Ventilator Company (Seller) warrants products of its own manufacture, against defects of material and workmanship
under normal use and service for a period of eighteen (18) months from date of shipment or twelve (12) months from date of installa-
tion, whichever occurs first. This warranty does not apply to any of Seller’s products or any part thereof which has been subject to
extraordinary wear and tear, improper installation, accident, abuse, misuse, overloading, negligence or alteration. This warranty does
not cover systems or materials not of Seller’s manufacture. On products furnished by Seller, but manufactured by others, such as
motors, Seller extends the same warranty as Seller received from the manufacturer thereof. Expenses incurred by Purchaser’s in
repairing or replacing any defective product will not be allowed except where authorized in writing and signed by an officer of the
Seller.
The obligation of the Seller under this warranty shall be limited to repairing or replacing F.O.B. the Seller’s plant, or allowing credit at
Seller’s option. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EITHER EXPRESSED OR IMPLIED
INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND OF ALL OTHER
OBLIGATIONS AND LIABILITIES OF THE SELLER. THE PURCHASER AC NOWLEDGES THAT NO OTHER REPRESENTA-
TIONS WERE MADE TO PURCHASER OR RELIED UPON BY PURCHASER WITH RESPECT TO THE QUALITY OR FUNCTION
OF THE PRODUCTS HEREIN SOLD.
Removal of the Sellers nameplate or any generic fan nameplate containing the fan serial number voids all warranties, either written or
implied. Failure to complete and document all the pre-startup and post startup checks and perform the suggested routine mainte-
nance checks voids all warranties, either written or implied.
LIMITATION OF LIABILITY:
Notice of any claim, including a claim for defect in material or workmanship, must be given to Seller in writing within 30 days after
receipt of the equipment or other products. Seller reserves the right to inspect any alleged defect at Purchaser’s facility before any
claim can be allowed and before adjustment, credit, allowance replacement or return will be authorized. See RETURNS below.
Seller’s liability with respect to such defects will be limited to the replacement, free of charge, of parts returned at Purchaser’s
expense F.O.B. Seller’s plant and found to be defective by the Seller.
IN NO EVENT WILL SELLER BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER
IN CONTACT, TORT, NEGLIGENCE, STRICT LIABILITY OR OTHERWISE, INCLUDING WITHOUT LIMITATION DAMAGES FOR
INJURY TO PERSONS OR PROPERTY, LOST PROFITS OR REVENUE, LOST SALES OR LOSS OF USE OF ANY PRODUCT
SOLD HEREUNDER. PURCHASER’S SOLE AND EXCLUSIVE REMEDY AGAINST SELLER WILL BE THE REPLACEMENT OF
DEFECTIVE PARTS AS PROVIDED HEREIN OR REFUND OF THE PURCHASE PRICE FOR DEFECTIVE PRODUCTS, AT SELL-
ER’S SOLE OPTION. SELLER’S LIABILITY ON ANY CLAIM, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILI-
TY OR OTHERWISE, FOR ANY LOSS OR DAMAGE ARISING OUT OF OR IN CONNECTION WITH PURCHASER’S ORDER OR
THE PRODUCTS OR EQUIPMENT PURCHASED HEREUNDER, SHALL IN NO CASE EXCEED THE PURCHASE PRICE OF THE
EQUIPMENT GIVING RISE TO THE CLAIM.
RESPONSIBILITY:
It is the understanding of the Seller that Purchaser and/or User will use this equipment in conjunction with additional equipment or
accessories to comply with all Federal, State and local regulations. The Seller assumes no responsibility for the Purchaser’s or Users
compliance with any Federal, State and local regulations.
RETURNS:
Cincinnati Fan & Ventilator Company assumes no responsibility for any material returned to our plant without our permission. An RMA
(Return Material Authorization) number must be obtained and clearly shown on the outside of the carton or crate and on a packing
slip. Any items returned must be shipped freight prepaid. Failure to comply will result in refusal of the shipment at our receiving
department.
OMM-23-1009-page 14
DISCLAIMER
This manual, and all its content herein, is based on all applicable known material at the time this manual was created. Any parts of
this manual are subject to change at any time and without notice.
If any statements, diagrams and/or instructions contained herein, for components not manufactured by the Seller, conflict with
instructions in the manufacturer’s manual (i.e.: motors, dampers, etc.), the instructions in the manufacturer’s manual, for that compo-
nent take precedent.
Should you want the latest version of this manual, please contact us or our sales office for your area. Or, you can print a current ver-
sion by going to our website at: www.cincinnatifan.com
7697 Snider Road, Mason, OH 45040-9135
Phone: [phone] Fax: [phone]
E-Mail: [email protected]

OMM-23-1009-page 15
X. PARTS DRAWING:
Cincinnati Fan manufactures many models and arrangements with special variations. For that
reason, the maintenance manuals contained on our website do not include a parts drawing nor the
completed blower or fan specifications on page 1. For the parts drawing of all the standard
components and specifications for the specific blower or fan that you have, please contact our local
Cincinnati Fan sales office for your area.
You will need to give them the serial number shown on the blower or fan nameplate so they can
supply you the correct information.
Click on “Contact a Sales Rep” on our website for the name and contact information for our local
sales office for your area. www.cincinnatifan.com
PLEASE NOTE