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Wiring of the motor should be performed according to Electrical Installation Technology Standards and
Internal Wiring Standards by a licensed electrician. (Also refer to the instruction manual of the motor.)
Before performing test operation, make sure that there are no
materials, bolts, nuts, tools, etc. left behind after installation inside
the connected ducts or casing or near the inlet or outlet. If such
objects are left behind, they may be sucked in or blown out during
test operation, resulting in damage.
Do not climb or stand on the fan. Doing so may result in
deformation and damage of the fan or falling off of the worker.
Intake of gases at temperatures outside the specified temperature
range may result in failure of the motor or wiring section or in
breakage of the impeller.
(Temperature range: -10 to 40°C; Relative humidity: 90% or less)
Solid objects, dust, or liquids cannot be sucked in. Doing so may
result in damage.
When speed is reduced using an inverter, etc., vibration amplification or sound may occur at
specific frequencies (rotation speeds) due to resonance between the fan body, surrounding
ductwork, and mounting plates. If this occurs, avoid operation at those frequencies. Shipment
inspection* of the fan is performed only at the rated rotation speed. Operation at other speeds
(frequencies) is not guaranteed.
* Operation testing cannot be performed for non-standard products or parts in some cases.
Cautions regarding adjustable-at-rest impeller blades
Although with this fan the angle at which the blades are attached to
the impeller can be changed to achieve other performance
characteristics, it is also possible that problems may occur due to
the following factors if the blade angle is changed by the customer.
There is a danger of damage. The blade attachment angles are set
at the factory to meet the performance requirements of customers;
if the blade angle must be changed later, please consult our
company's service personnel. (Service charges will apply.) For
details, please contact your dealer or sales office.
Factors causing problems due to angle change
• Power may be increased, causing the motor to become overloaded and burned out.
• Changes in the attachment positions of blades may make the impeller unbalanced.
• If the angle change is non-uniform, abnormal flow may occur, causing malfunctions due to abnormal
noise or vibration.
• If nut tightening torque is insufficient, the nut may become loose, allowing the blade to rattle and
causing a malfunction.
