Installation, Operation & Maintenance Manual
IM-166
5
Handling
Handling of all air moving equipment should be conducted by trained personnel and be consistent with safe handling practices. Verify
the lift capacity and operating condition of handling equipment. When using hoisting equipment, only qualified and trained personnel
should operate the equipment.
Units shipped completely assembled may be lifted with slings and spreader bars. (Use well-padded chains, cables or nylon straps,
rated to lift the required weight.) On most units, lifting lugs are designed to protect the fan and fan housing from damage. Never lift a
fan by the inlet or discharge flange, shafting or drives, impeller, motor or motor base, or in any other manner that may bend or distort
parts. Never lift with slings or timbers passed through the fan inlets.
For fans provided without lifting lugs, use a forklift or pallet jack to handle the equipment. Consult a qualified person before lifting.
Partial or disassembled units require special handling. All parts should be handled in a method that protects the coatings and parts
from damage. Components should be handled such that forces are not concentrated to avoid bending or distortion.
The housing should be lifted using suitably rated spreader bars and padded chains or straps. Do not distort housing or side plates
when lifting.
The shaft and impeller assembly may be lifted using a hoist and a spreader with slings around the shaft at either side of the impeller.
Use the spreader bar to ensure that the slings do not push against the sides of the impeller as this may distort the impeller. Take care
not to damage the shaft where the impeller or bearings will be mounted. Never lift or support the assembly by the impeller. Always
support the assembly by the shaft when lifting or storing (see the section regarding proper storage of equipment). Do not support the
shaft or the impeller on the housing sides. See the Fan Installation section for additional details.
Impellers shipped separately can be lifted by slings running between the blades or through the hub. Never lift the impeller by a single
blade or single point on the flange/shroud. Do not to put a chain within the hub bore. Always transport impellers by lifting, do not roll
the impeller as this can damage coatings and change the balance of the impeller.
Bent shafting is a source of vibration and bearing failure, so be sure
to handle the shaft with care. If the shaft is bent, replace the shaft.
Any scratches on the shaft may be repaired with fine emery cloth
or a stone. Remove only the displaced metal that forms a high
point at the edge of the scratch.
1. Bearing pedestals should be lifted using straps or padded
chains. Under no circumstance should an attached or separated
bearing pedestal be lifted by the shaft, bearings, drives, motor
or impeller.
2. Note some rotor assemblies may have an off-center CoG and
therefore a qualified person should be consulted before lifting.
CAUTION
Lift completely
assembled fans with
straps and spreader bar,
as shown
Lifting lugs are provided on most units.
1. Maintain handling equipment to avoid serious personal injury and do not stand under
the load.
2. If supplied, only use the provided lifting lugs to lift the equipment.
3. Ensure that the lifting equipment is rated for the capacity to be lifted.
CAUTION
