Hog Slat Inc. Newton Grove, NC USA January 2020 7 Ventilation System Once completed; using a couple of people, check door for binding. Then make sure that all of the hinge attachment points have been screwed to bottom Perimeter Stringer. In some cases, especially retrofit of door to older houses, it may not be possible for the Tunnel Door System to exactly fit the available opening. In this instance, the Tunnel Door System will be larger in height and width than the opening. If this happens the Tunnel Door System overhang should be centered top-to-bottom and/or left-toright. Actuation Rod and Pulleys Special Note: Consideration should be given to other hardware located on wall when positioning the actuator rod and pulleys for proper operation to avoid interference with Tunnel Door operation. This is especially important in retrofit of tunnel Door Systems in existing houses. These items could include winches, wall inlets, etc. A ¾” Nylon Pulley (supplied) should be located on the centerline of each door split bolt using a ¼ x 3 ½ cup hook (supplied) positioned approximately 3” above door in top Perimeter Board (See Figure 7). Hook should be closed after pulley is assembled. Figure 7 The 3/16” Control Rod should be cut approximately 2 feet longer than total door width. (For Example; Rod for 80 Foot Door should be 82 Feet long). Control Rod should be positioned on ledge above door created by top Perimeter Board skewed toward pull direction (control machine end) of system with other end flush with door edge. Caution: Great care should be taken when uncoiling Control Rod as it is under tension and will want to spring straight. It would be impossible to show every way to cable the Tunnel Doors. Generally, the Control Machine, DoubleBack Pulleys and Hand Winch would be mounted to the end wall. A 25 pound weight should be attached to end of Control Rod opposite the Control Machine and Winch using necessary 3/16” Galvanized Cable, clamps and necessary pulleys to ensure that weight is located away from other equipment and does not interfere with day-today operation for facility. The other end of Control Rod should be attached to Manual Winch and control machine in the same manner mentioned before. See (Figure 8) for method of attaching Cable to control Rod using (3) clamps. Note: Cable Clamps are alternated 180°. Control Rod should be attached to top edge of Perimeter Board using ¼ x 3 ½” Cup Hooks. Care should be taken in positioning cup hooks as not to interfere with the
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