Hog Slat Inc. Newton Grove, NC USA August 2022 12 Air Storm Fans 12. The butterfly assembly comes pre-installed onto housing. Inspect orientation of butterfly Correct orientation of the butterfly is critical to correct operation. This side up decal should indicate orientation. If decal is absent orientation can be determined by location of bolt on vertical upright of butterfly. It should be oriented toward the top of the fan. At this time also inspect tightness of fit of the butterfly to the orifice. OI The following step is optional. If desired, the butterfly assembly may be removed and included sponge gasket can be installed around the outermost circumference of the orifice and the butterfly assembly reinstalled. IF COMPLETED ENSURE CORRECT ORIENTATION OF THE BUTTEFLY FROM ABOVE.
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