8-1
8.
Special accessories
8.1 Dampers
(1) Refer to the external dimension drawing submitted separately. Install the damper in the
designated place while paying attention to the rotation direction of the vane.
(2) Open and close the vane to check that it does not contact the casing or ducts.
(3) Apply lube grease on the sliding parts of the vane control damper periodically (once
approximately three months).
(4) If the damper is of an electric or air cylinder type, carefully read the instruction manual of each
equipment before use.
8.2 Expansion joints
Take the distance between the sides as shown on the external dimensions drawing, and take
care not to pull or compress the joints excessively. Do not use the expansion joints to correct the
alignment of the fan or duct.
8.3 Filter
Plan the installation of the fan in consideration of installing short ducts in order to facilitate
disassembly of the fan.
Install filters after thoroughly cleaning the inside of the fan and ducts.
Inspect the filter earlier once the operation starts since it tends to clog easily.
Periodically disassemble the filter element and wash it.
Rotation direction
Vane control
Damper
Rotation direction
Vane control
Damper
(Correct) (Wrong)
Opening and closing directions of damper after rotation speed adjustment
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