valutazioni - 3, GPA: 4
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Actual lengths gained after fitting overlaps must be taken into consideration (lineal gain) and are given in the lineal gain chart (see Figure 6). Lineal Gain is the actual measurable length of a part after two or more parts are connected. For Canada, use chimney parts designated "HT". Venting Installation Figure 5 - Outside Air Kit Secure to Collars with Metal Tape, Screws or Straps (Min. 1/4" x 20" size) Air Inlet Location Must Allow For Bushes or Snow Vent Hood Required for Wall Installation Air Inlet Eyebrow Vented Crawl Space (Check Local Codes Before Installing in a Vented Crawl Space) Optional Outside air Kit (Model ak 4/ak 4f) Installation of an outside air kit should be performed during rough framing of fireplace due to the nature of it's location. Outside combustion air is accessed through a vented crawl space (AK4F) or through a sidewall (AK4). See Figure 26 on page 14 for instruction of operating air kit. CAUTION: Combustion air inlet ducts shall not terminate in attic space. The maximum height for the air vent can not exceed 3 feet below the flue gas outlet of the termination. Assembly and installation of double wall chimney system Each double wall chimney section consists of a galvanized outer pipe, a stainless steel inner flue pipe and a wire spacer. Pipe sections must be assembled independently as chimney is installed. When connecting chimney directly to fireplace, inner flue pipe section must be installed first with lanced side up. The outer pipe section can then be installed over flue pipe section with hemmed end up. Press down on each pipe section until lances securely engage hem on fireplace starter. The wire will assure proper spacing between inner and outer pipe sections. WARNING: The opening in collar around chimney at top of fireplace must not be obstructed. Never use blown insulation to fill chimney enclosure. VenTing insTallaTion Continued Continue to assemble chimney sections as outlined above, making sure that both inner and outer pipe sections are locked together. When installing double wall snap-lock chimney together, it is important to assure the joint between chimney sections is locked. Check by pulling chimney upward after locking. The chimney will not come apart if properly locked. It is not necessary to add screws to keep chimney together (exception, see Figure 7). OFFSET RISE CHIMNEY LENGTH A B 12" 18" 24" 36" 48" 4 3/8" 16 3/8" ELBOW SET ONLY 9 3/4" 25 1/2" 1 12 3/4" 30 3/4" 1 15" 34 3/4" 1 18" 40" 1 1 21 1/4" 46 1/4" 1 23 3/4" 49 1/4" 1 1 27 3/4" 56 3/4" 1 30" 60 3/4" 1 1 33" 66" 1 1 36" 71" 1 1 38 1/4" 75" 2 41 1/4" 80 1/4" 1 1 1 45" 86 3/4" 2 46 3/4" 89 1/2" 1 1 1 51" 97" 1 1 53 1/4" 101" 1 2 56 1/4" 106 1/4" 2 59 1/4" 111 1/2" 1 1 1 61 3/4" 115 1/2" 1 2 64 3/4" 120 3/4" 1 2 68 1/4" 127" 2 1 70" 130" 1 1 2 74 1/4" 137 1/2" 1 2 1 76 3/4" 141 1/2" 1 2 1 79 3/4" 146 3/4" 4 OFFSET CHART (22-50 FT. SYSTEM HEIGHT) Screws USING ELBOW OFFSETS (30E-12DM) 1. To achieve desired offset, you may install combinations of 12", 18", 24", 36" and 48" length of double wall pipe (see offset chart and Figure 7). 2. Chimney weight above offset rests on return elbow. Straps must be securely nailed to rafters or joists (see Figure 8, details a and b). 3. Maximum length of pipe between supports (return elbow or 12S-12DM) is 6' of angle run. Maximum of two 6' angle run sections per chimney system (see Figure 9, page 8). 4. All pipe connections between offset and return must be secured with two screws on outer pipe only (see Figure 7). Do not penetrate inner stainless. 2" Min. Straps Straps StrapsStraps Detail A Return Elbow Detail B Angle Firestop See Detail A See Detail B Figure 8 - Ceiling Support Pipe 12S-12DM B A Figure 7 - Elbow Offset 116010-01E VenTing insTallaTion Continued Return Elbow Offset Elbow Return Elbow Offset Elbow 6' Max. 6' Max. 6' Max. 6' Max. 6' Max. 6' Max. Return Elbow Offset Elbow Offset Elbow Return Elbow A B C Offset Elbow Ceiling Support Pipe 12S-12DM Return Elbow Figure 9 - Typical Offset Terminations FIRESTOP SPACERS (1100EFS-10DM) Firestop spacers are required at each point where chimney penetrates a floor space. Their purpose is to establish and maintain required clearance between chimney and combustible materials. When pipe passes through a framed opening into a living space above, firestop must be placed onto ceiling from below as shown in Figure 10. They also provide complete separation from one floor space to another or attic space as required by most codes. When double wall pipe passes through a framed opening into an attic space, firestop must be placed into attic floor as shown in Figure 11. Figure 10 - Firestop Spacer with Living Space Above Ceiling Existing Ceiling Frame Firestop Spacer Screws or Staples (Min. of 8) Firestop Spacer Screws or Staples (Min. of 8) Existing Ceiling Frame Figure 11 - Firestop Spacer with Attic Space Above Ceiling PENETRATING THE ROOF To maintain a 1" clearance to the pipe on a roof with a pitch, a rectangula...
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