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4.2 Duct connection
•
Install a removable duct for maintenance and inspection and an inspection hole in front of and
behind the fan.
(Secure a space for inspection with the duct removed.)
•
Attach a metal wire net to each of the openings of the intake duct and discharge duct as a
safety measure.
(The metal wire net is an optional accessory.)
•
If the duct is installed inappropriately, increase in resistance may cause not only a lack of air
flow but also stalled operation status, leading to accident resulting in damage to the product.
When installing the duct, pay attention to the following points:
(1) When using a flexible joint, apply
appropriate tension to it.
Keep the length to the minimum
necessary by putting in a reinforcing ring
to prevent shrinkage on the negative
pressure side in particular.
×
〇
(2) When using an elbow with a small
curvature, attach a corner vane to it.
×
〇
(3) Prevent sudden expansion and sudden
reduction.
×
〇
(4) When the intake port is open, attach an
intake bellmouth to retain the
performance.
×
〇
(5) When the discharge port is open, attach a
diffuser to retain the performance.
×
〇
(6) Prevent installing the blower with the
intake port/discharge port close to the
wall.
d or more
d or more
