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Location where no dangerous chemicals are present.
4.1.2
Foundation and mounting
For the amount of foundation concrete to use, a general reference is that an amount equal to 3
times the weight of the fan is suitable.
When mounting on top of a frame, be sure to mount it on a surface having sufficient structural
strength.
If there is a gap between the fan and the foundation surface, use liner plates (steel plates for filling
gaps) to fill the gap and verify that the fan does not rock before tightening the foundation bolts.
When mounting in the middle of a duct, take the weight of the fan into consideration and be sure to
use duct having sufficient strength. In addition, if necessary use hanging bolts, wire cables, etc. to
support the weight of the fan.
Be sure to fully tighten bolts and nuts.
Mounting orientation should be horizontal or with the inlet facing down. Mounting with inlet facing
upward is non-standard. In addition, vertical mounting of fans with foot-mounted motors is not
correct.
If the fan will be mounted in a high location and especially frequent inspection or repairs are
expected, lifting equipment should be installed.
4.2 Connection to ducts
Install removable ducts for maintenance and inspection holes before and/or after the fan. (Be sure to
provide enough space for removing ducts and performing inspection.)
Install screens at the duct inlet and/or outlet for safety. (Screens are optional accessories.)
If the ductwork is not suitable, not only will resistance be increased and air flow be insufficient, the
fan may operate stalled. This may result in breakage. Be careful of the following points when
installing ductwork.
(1) When using expansion/contraction joints, be sure to apply sufficient tension. In particular, install a
collapse-prevention reinforcement ring on the inlet-side expansion/contraction joint so that it does
not collapse due to vacuum and use the minimum possible length.
(2) For small-radius-curve elbows, install corner vanes.
Horizontal mounting
Inlet facing down
Inlet facing up
(non-standard)
Foot-mounted motor
