Assessments - 1, GPA: 4
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WALLFIRESTOP Figure 37 Installing Firestops (Figures 38, 39, 40 and 41) Firestops are required for safety whenever the vent system passes throughaninteriorwall,anexteriorwall,oraceiling.Thesefirestops act as a firebreak heat shield and as a means to insure that minimum clearances are maintained to the vent system. Horizontalrunsintheventsystemwhichpassthrougheitherinterior or exterior walls, require the use of wall firestops on both sides of the wall through which the vent passes. Cut a 10-3/8 inch x 12-3/8 inch hole in wall. Position firestop (SD1249) on interior side of wall for 10-3/8 inch x 12-3/8 inch hole. Attention: Wall firestop hole is off-set towards bottom of wall opening. Secure with nails or screws. Continue the vent run through the firestop (See Figure 38). HOLE IS OFF-SET TOWARDS BOTTOM OF WALL OPENING. Figure 38 Vertical runs of this system which pass through ceilings require the use of ONE (1) ceiling firestop at the hole in each ceiling through which the vent passes. Position a plumb bob directly over the center of the vertical vent component and mark the ceiling to establish the center point of the vent. Drill a hole or drive a nail through this center point and check the floor above for any obstructions such as wiring or plumbing runs. Reposition the appliance and vent system, if necessary, to accommodate ceiling joists and/or obstructions. Cut a 10 1/2 inch x 10 1/2 inch hole through the ceiling, using the center point previously marked. Frame the hole with framing lumber the same size as the ceiling joists. (See Figure 39) If the area above the ceiling is NOT an attic, position and secure the ceiling firestop (SD-1263) on the ceiling side of the previously cut and framed hole. (See Figure 40) If the area above the ceiling is an attic, position and secure the firestop on top of the previously framed hole. (See Figure 41) NOTE: Remove insulation from the framed area in the attic before installing the firestop and/or vent pipes. Page 24 17375-10-0706 FRAMING AND FINISHING (continued) Figure 39 Figure 40 HORIZONTAL TERMINATION Attach the termination cap with the four wood screws provided. Before attachmentof thetermination, run a bead of siliconesealant rated above 250°F on its outside edge too, so as to make a seal to the exterior wall. NOTE: Woodscrewscanandshouldbereplacedwithappropriate fasteners for use on stucco, brick, concrete or other types of siding. CAUTION: If exterior walls are finished with vinyl siding, (or materials that could become discolored or warp) it is necessary to install the vinyl siding standoff SD-1250. Vinyl siding standoff SD-1250 will be installed between the vent termination and the exterior wall. (See Figure 42) This horizontal vent termination bolts onto the flat portion of the vinyl siding standoff, so an air space will exist between the wall and the termination cap. Figure 42 NOTE: Termination cap should pass through the wall firestop from the exterior of the building. Adjust the termination cap to its final exterior position on the building. Warning: Termination cap must be positioned so that arrow is pointing up. Figure 41 See Horizontal Termination Page 25 and Vertical Termination Page 27-28. 17375-10-0706 Page 25 Page 26 17375-10-0706 INSTALLATION 1. Unpack vent components and check that all items are included. 2. Check to see that the vent spacer springs are located around the flue vent at 8" and 12" intervals along its length. See Figure A. If not, stretch the spacer springs to about 15" long and wrap them around the flue, then interlock the ends of each spring about 2". See Figure B. Maintain equal distance between spring spacers. 3. Use existing 8" dia. inlet collar to attach outer vent pipe. 4. Install the Wall Firestop/Thimble assembly as required through the wall. Refer to the venting charts in the fireplace manual to determine the proper height and size of the vent opening. The minimum opening should be 10" wide by 12" high. The minimum combustible clearance from the horizontal vent is 1" from sides and bottom, and 3" above the vent pipe. See Figure D. 5. In most cases, after determining the length of the vent that is needed, it may be easier to install the flue and outer vent pipes to the Termination Cap first, then from the outside, feed the venting through the wall to the fireplace. 6. If the venting is to long, trim off any excess vent before attaching the vent end connectors. 7. Attach the Termination Cap to the outside of the house. 8. Prior to making the vent connections, apply high temperature sealant (1000 degree F min.) to the vent connections before securing with the band clamps provided. Note: the flue pipe end without the adapter is to be installed to the Termination Cap. 9. Apply sealant to the outside of the flue pipe adapter and connect to the flex flue pipe. Then insert the adapter into the fireplace flue. Secure flue adapter to the fireplace flue with a minimum of two screws provided. See Figure C. 10. Attach the Outer Vent p...
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