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Фрагмент инструкции
This opening must be large enough to provide a minimum 1” air space clearance from the vertical vent pipe to any combustible framing. 6. Install the Firestop/Thimble assembly to the framed opening in the ceiling using common nails or screws. Note: The thimble assembly is adjustable up or down as needed within the firestop. It is also designed with a pivoting firestop for use with 0 - 3/12 pitch cathedral ceilings. 7. To begin vent system assembly, first layout all the vent components on the floor in the order in which they will be assembled. 8. Stretch the 4” diameter inner flex flue and 7” diameter outer flex vent to the maximum length of 6 feet. 9. Install the spring spacers provided around the 4” diameter flex flue at 1 foot intervals, then slide the flue pipe with spacers into the 7” diameter outer flex vent pipe. Make sure the springs are spaced evenly starting at 12 inches from the fireplace collar. See Figure 30. FLEX OUTER AIR INTAKE PIPE SPACER SPRINGS FLEX FLUE PIPE Figure 29 Figure 30 305mm 305mm 305mm 305mm 12” 12” 12” 12” 4” FLEX VENT PIPE SPACER SPRINS Step-By-Step Installation For Flex DV Kit DVVK-4FV DIRECT VENT TERMINATION KIT (cont.) Page 22 25613-0-0309 10. With the flex vent assembly and the 48” long hard pipe components laid out on the floor, begin securing these parts together. First, apply a generous bead of silicone sealant to the inside of the 4” diameter flex flue (not the end with the preinstalled connector), then slide the flex flue over the 4” diameter hard pipe flue. Be sure to overlap at least 1-1/4”. Secure this connection with a 4” diameter band clamp provided. Be careful not to damage or tear the flex flue when tightening clamp. 11. Repeat the connection process for the outer 7” diameter flex vent to hard pipe connection. Use silicone sealant at this joint also, overlap at least 1-1/4”, then secure the joint with the 7” diameter band clamp provided. Be careful not to damage or tear the flex vent pipe when tightening the clamp. 12. While the venting is still on the floor, assemble the roof jack components as shown in Figure 31 and pre-install the roof jack assembly to the hard pipe approximately 18” from the top end of the hard pipe. 13. Now the pre-assembled vent system may be carried to the roof, then lowered through the roof cutout opening (see step 5). Feed the flex vent end down through the roof opening and firestop/thimble assembly installed in steps 4 through 6. 14. Secure the roof support assembly to the roof sheathing with at least (4) nails/screws through each support bracket. Check that the combustible clearances through the roof framing will maintain at least a 1” clearance from the vent pipe. 15. Determine how high the vent terminal should be located above the roof line based on the roof pitch information shown in Figure 33. Adjust the vent system height by loosening the pre-installed roof support pipe clamp and sliding the vent pipe up or down as pre-determined, then re-tighten the pipe clamp. Install a couple of sheet metal screws through the pipe clamp into the outer hard vent pipe to lock in place. 16. Check to make sure that the bottom end of the flex vent is long enough to reach the fireplace adapter collars. If too long, trim off the extra flex vent not needed. NUT (2) SCREW (2) PIPE CLAMP ROOF BRACKET (2) WING NUT (2) H X 12 VENT CAP GAS VENT LOWEST DISCHARGE OPENING ROOF PITCH IS X/12 H (Min.) - Minimum height from Figure 31 roof to lowest discharge opening Figure 33 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) DVVK-4FV DIRECT VENT TERMINATION KIT (cont.) Figure 32 When terminating the vent cap near an exterior wall or overhang, maintain minimum clearances as shown in Figure 32. 25613-0-0309 Page 23 17. To attach the vent connections at the fireplace, be sure the 7” diameter adapter collar has been installed per step 3. Apply a bead of silicone sealant to the 4” diameter flex connector, then slide the flex pipe adapter collar into the fireplace flue collar and secure by installing a minimum of two (2) screws through the flue collar and into the adapter. See Figure 34. 18. Apply sealant to the 7” diameter adapter collar, slide outer flex vent over the collar, then secure with a 7” diameter band clamp. See Figure 34. 19. Once the lower connections are made and the flex pipe is secured with support bands as required (3 feet minimum between supports) then the roof flashing can be installed. See Figure 35. 20. Install the roof flashing, and seal using common constructions practices. 21. An additional storm collar band is provided in kit that may be used as an attic insulation shield. The collar can be installed around the flex pipe (or hard pipe) just above the firestop thimble. This collar will act as a shield to prevent blown insulation from entering the thimble. 22. To complete the vent installation, install the vent termination cap t...
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