Grain Systems Tanks PNEG-4021 - Manual (Page 73)

8. Instructions
PNEG-4021 40 Series 18', 21' and 24' Diameter Bins 73
Auto-Vent Assembly and Installation Instructions
The following instructions are for assembling and installing the Auto-Vent. First, check the packing list to
ensure all components have been shipped. The unit is easiest assembled in the upside down position
as shown in the instructions.
Assembly
1. Take all parts out of the shipping box and check if all parts are present.
2. Turn one roof vent housing (MIS-6778) upside down. (See Figure 8A.)
3. Insert 5/16" x 1-1/4" bin bolt with neoprene washer through hole in the side of roof vent. Place
jamb nut onto the bolt and tighten. (See Figure 8A.)
4. Slide flap assembly (MIS-6777) on to bolt. The bolt should slide through hole in the flap assembly
bracket. Install with curvature cupped upward and the brackets in the position as shown in Figure 8A .
5. Insert 5/16" x 1-1/4" bin bolt with neoprene washer through the other side of the roof vent, through
jamb nut and other flap assembly bracket. Tighten nut against vent housing side.
6. Apply a bead of tube caulking around three (3) housing sides of the roof vent where it meets the
hold-down angle.
7. Place hold-down angle (MIS-4404) on the assembled roof vent. The wide end of the hold-down angle
must face vent discharge. Once aligned, screw nine (9) #10 self-drilling (S-280) screws through the
roof housing and into the hold-down angle.
(See Figure 8B on Page 74.)
Figure 8A
Ref # Part # Description
A MIS-6777 Flap Assembly
B MIS-6778 Vent Housing Assembly
C 5/16" x 1-1/4" Nut and Bolt