GC150 SERIES DIRECT VENT GAS APPLIANCE
b.Amount of venting required. Due to the many different combinations that can be used when con- structing venting, the number of vent sections required can only be determined by the installer.
Note: Horizontal runs will require the use of one Vent Support (VS4) for every 3' of vent.
2.Preparing the wall for interior wall shield. A hole measuring 10" wide X 12" high must be cut and framed in the exterior wall where venting will be terminated. If the wall being penetrated is con- structed of
The hole must be positioned so the vent system will have a 1/4" rise for every 12" of run AND be perpendicular to the wall. See Figure 6. The height of the hole must be located to meet all local and national codes and not be easily blocked or obstructed. The minimum height to the top of the exterior wall hole is 45” from the base of the unit. This figure will increase by the length of each verti- cally positioned vent section added to the venting system.
3.Interior Wall Shield. An interior wall shield must be installed each time the venting system penetrates a wall. This shield has been designed to maintain the minimum clearances needed for the venting system and prevent cold air infiltration.
After the venting hole has been cut and framed, secure an interior wall shield into position with four 1" fasteners, one in each corner. Bend out the tabs located on the inner portion of the wall shield and use a 1/2" screw to secure each tab to the penetrating pipe. See Figure 7. (1/2" screws are used to avoid penetrating the inner pipe.)
Note: Exterior wall thickness must be a min- imum of 4" to a maximum of 231⁄2”.
4.Venting through the wall. Horizontal venting must terminate within the shaded area shown in Figure 5 on the previous page. For example, if your vertical rise is the minimum one foot, venting can terminate anywhere between 16 inches and 3 feet.
The last section of vent may require cutting, depend- ing upon wall thickness and appliance location. The end of the vent must penetrate the exterior wall. Cut the pipe so the outer vent section extends past the exterior wall by 1" and the inner vent section extends past the exterior wall by 21⁄2". See Figure 8.
Figure 6
Exterior Wall Hole
Figure 7
Interior Wall Shield
Figure 8
Venting Through the Wall
NOTE: IF THE TERMINATION CAP IS SUR- ROUNDED BY VINYL SIDING OR IS LOCAT- ED BELOW A VINYL SOFFIT, A VINYL SHIELD MUST BE USED TO PREVENT DAM- AGE TO THE VINYL.
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