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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

Summary of Contents for LM

Page 1: ... 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 ...

Page 2: ...r 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 p...

Page 3: ...dance 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 ass...

Page 4: ...eters 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 blow...

Page 5: ...ay 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 KEEP THE MOTOR CLEAN AND DRY This requires periodic inspections of the motor The frequency of the inspecti...

Page 6: ... 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 al...

Page 7: ... 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 bl...

Page 8: ...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...

Page 9: ... 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 e...

Page 10: ...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 bl...

Page 11: ...Y 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...

Page 12: ...aintenance 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 periodic inspection and maintenance log ...

Page 13: ... 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 AVAILABLE while the motor is in storage If the motor does not have space heaters storing it in a damp or humid...

Page 14: ...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...

Page 15: ...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 ...

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