Assessments - 2, GPA: 5
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See Figure B. Maintain equal distance between spring spacers. 3. Remove the 6-." dia. Vent collar from the fireplace. Replace this collar with the 7" dia. Flex Vent adapter collar provided with the vent kit. 4. Slide the Flex Vent flue pipe into the Outer Flex Vent pipe. 5. 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 9" wide by 11" high. The minimum combustible clearance from the horizontal vent is 1" from sides and bottom, and 3" above the vent pipe. See Figure D. 6. 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. 7. If the venting is to long, trim off any excess vent before attaching the vent end connectors. 8. Attach the Termination Cap to the outside of the house. 9. 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. 10. 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. 11. Attach the Outer Vent pipe to the 7" dia. Collar on the fireplace with a large band clamp provided. Sealant may also be used on the outer vent connections. 12. Check all vent connections for tightness. Make sure horizontal venting has the proper rise and combustible clearances required. Refer to venting charts in fireplace instruction manual. 8 (203 mm) 8 (203 mm) 8 (203 mm) 4 FLEX VENT PIPE SPACER SPRING FIGURE B ” ” ” ” FLEX OUTER VENT FLEX FLUE PIPE SPACER SPRINGS FIGURE A Top of Vent Combustibles NOT allowed in shaded area 1" 1" 3" (25 mm) 7” Diameter intake vent 4” Diameter flue (25 mm) (76 mm) FIGURE D Flex venting can be installed either vertically or horizontally off of the DVD Series fireplaces. When installing a horizontal vent run from top connections, maintain at least ." rise for every 12" of vent run. When venting horizontal off the rear vent connections, allow a minimum rise of 2". Refer to Figure 42 when mounting termination near vinyl siding. CAUTION: Always stretch and secure venting with wire or metal strapping to ensure that the horizontal runs do not sag. If space permits, it is generally easier to attach venting in the top vent configuration. Because of sharp edges, always use gloves when handling the flex vent components. Vent connections should overlap a minimum of 1" for proper sealing. Always follow the general venting requirements for vent terminal location, vent lengths, and clearance to combustible materials. The DVVK-4F FLEX VENT KIT includes the following components: • (1) Horizontal Termination Cap • (1) 4-foot section of Flex vent with spacers (4" flue/7" outer pipe) • (1) 4" dia. Flue adapter collar • (1) 7" dia. Outer Vent adapter collar • (1) Wall Firestop/Thimble Assembly • Hardware pack that includes band clamps and screws BAND CLAMP 4 DIA. FLUE ADAPTOR COLLAR 4 DIA. FLEX FLUE PIPE 7 DIA. FLEX VENT PIPE APPLY HIGH TEMPERATURE SEALANT 7 DIA. INLET ADAPTOR COLLAR (WITH GASKET) ” FIGURE C ” ” ” DVVK-4F FLEX VENT INSTRUCTIONS VERTICAL TERMINATION Locate and mark the center point of the vent pipe using a nail on the underside of the roof. Drive the nail through the center point. Mark the outline of the roof hole around this center point. NOTE: Size of the roof hole dimensions depend on the pitch of the roof. There must be a 1 inch clearance (25mm) to the vertical pipe sections. This clearance is to all combustible material. Cover the opening of the vent pipe and cut and frame the roof hole. Use framing lumber the same size as the roof rafters and install the frame securely. Flashing anchored to frame must withstand high winds. The storm collar is placed over this joint to make a watertight seal. Non-hardening sealant should be used to completely seal this flashing installation. Determining Minimum Vent Height Above the Roof. WARNING: Major U.S. building codes specify minimum chimney and/orvent height abovetheroof top. Theseminimum heights are necessary in the interest of safety. These specifications are summarized in Figure 47. LOWEST DISCHARGE VENT CAP OPENING GAS VENT H ROOF PITCH IS X/12 H (Min.) -Minimum height fromroof to lowest discharge opening ROOF PITCH H (Min.) Flat to 6/12 12" (305 mm) 6/12 to 7/12 15" (381 mm) Over 7/12 to 8/12 18" (457 mm) Over 8/12 to 16/12 24" (610 mm) Over 16/12 to 21/12 36" (914 mm) When terminating the vent cap near an exterior wall or overhang, maintain minimum clearances as shown in Figure 48. General Maintenance Conduct an inspection of th...
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