VII. External Filter Bag Assembly

OAS Galvanized Plenum Box

Plenum Box

22 gauge galv.

1. Connect the plenum to the fan / blower outlet with the bolts provided. Band clamp tube filters to the Ring Thimbles on the bottom of the plenum and to the tops of the 5 gal. buckets.

(Check mounting height - Match to bag heights)

Build your own plenum

Plenum box can be constructed of plywood or metal. Oneida Air Systems sells 22 gauge galv. plenum boxes. The filter medium is a 16 ounce polyester felt which has been singed inside to help release caked dust.

For the tube style filters, a 12” dia. ring thimble (Part # FAZ000000) is needed for each filter. The plenum box and the ring thimbles are suspended above the floor at a height that will allow for a 5 gallon plastic bucket and tube filter to fit properly underneath.

A well sealed plywood box will make a good plenum for air distribution through the tube filters. Use plywood for the plenums. Cut 12” dia. holes in the bottom of the box (spaced 2 - 3” apart), so that the ring thimbles fit snugly. The rings should not be able to slide through the holes. Bend Ring Thimble tabs then apply duct sealant or caulk around the edge of the ring thimble. Use sheet metal screws to secure. Be sure to remove any sharp edges from the bucket or ring thimble that may abrade the filter. Slide the filter over the thimble past the raised bead. Secure with a band clamp. Slide the bottom of the filter over a five gallon plastic bucket. Secure with a band clamp or strong bungee (shock cord). Be sure filter is not loose or moving around when the system

is on. This could lead to wear on the filter.

With the use of a cyclone pre-separator, the buckets will not need emptying very often, but do need to be checked occasionally. Simply lift the bucket, the weight will indicate how full the bucket has become.

Note: Plenum hole configuration varies. The number of holes matches the number of filters. 2”

12” 12” 12”

Ring Thimble

Part # - FAZ000000

Hose Clamps

Part # - ACB120000

Tube Filters

16oz. Needle Felted Polyester

1 Micron Filtration

6’ long - Part # FTS060000 8’ long - Part # FTS080000* 10’ long - Part # FTS100000 *Note: Also available with zipper bottoms for 9’ ceilings.

Hose Clamps Part # - ACB120000

Air	2”
Inlet

Plenum box height - 12” min. Use 3/8” or thicker plywood. Seal plenum box with silicone.

5 gallon buckets 12” high (Not supplied with system). Can be purchased, Part No.

SDS050000 or recycled joint compound buckets 11 or food storage containers can be used.

10 HP Pulley Drive Owner’s Manual c O.A.S. 2007