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manual abstract
Fabricate a hearth extension using a material which meets the following specifications: a layer of noncombustible, inorganic material having a thermal conductivity of K=0.84 BTU IN/FT, HR. F (or less) at 1" thick. For example, if the material selected has a K factor of 0.25, such as glass fiber, the following formula would apply: 0.25 x 1.0" = 0.30" thickness required 0.84 Thermal conductivity "K" of materials can be obtained from the manufacturer or supplier of the noncombustible material. If the hearth extension is to be covered, use noncombustible material such as tile, slate, brick, concrete, metal, glass, marble, stone, etc. Provide a means to prevent the hearth extension from shifting and seal gap between the fireplace frame and hearth extension with a noncombustible material (see Figure 3). WARNING: Hearth extension is to be installed only as shown in Figure 3. Mantels A mantel may be installed if desired (see Figure 4). Woodwork such as wood trims, mantels or any other combustible material projecting from the front face must not be placed within 12" of the fireplace opening. Combustible materials above 12" and projecting more than 1 1/2" from the fireplace must not be placed less than 15" from the top opening of the fireplace (NFPA STD 211, Sec. 7-3.3.3). Mantels or any other combustible material also may come up to the side edge of the black metal face of the fireplace just as long as the projection from the front face fall within the limit shown in Figure 4. Fireplace Installation Continued Combustible Material 12 1/4" Ref. Safe Zone for Projection of Combustible Materials 6" Ref. 33° 3" Nom. 11/2" Max. 15" Min. 12" Min. Upper Section of Fireplace Fireplace Opening Seal Gap Fireplace Front FIREBOXSAFE ZONE Top View of Fireplace Ember Protector 7.75" Fireplace Front Raised Hearth 3" Max. Ember Protector Hearth Extension 4.5" 33° Fireplace Front Elevated Seal Gap Min. to Perpendicular Side Wall 12" Combustible Material Must Not Overlap Front Face Ember Protector Figure 3 - Hearth Extension Figure 4 - Mantel Clearances to Combustible Material Venting Installation Optional Outside air Kit (Model ak4/ak4f) The installation of an outside air kit should be performed during the rough framing of the 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). CAUTION: Combustion air inlet ducts shall not terminate in attic space. Chimney Pipe The DESA chimney system consists of 12", 18", 24", 36" and 48" snap-lock, double-wall pipe segments, planned for maximum adaptability to individual site requirements. 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". WARNING: The opening in the collar around the chimney at the top of the fireplace must not be obstructed. Never use blown insulation to fill the chimney enclosure. 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. The pipe sections must be assembled independently as the chimney is installed. When connecting chimney directly to the fireplace, the inner flue pipe section must be installed first with the lanced side up. The outer pipe section can then be installed over the flue pipe section with the hemmed end up. Press down on each pipe section until the lances securely engage the hem on the fireplace starter. The wire will assure the proper spacing between the inner and outer pipe sections. Continue to assemble chimney sections as outlined above, making sure that both the inner and outer pipe sections are locked together. When installing double wall snap-lock chimney together, it is important to assure the joint between the 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 the chimney together (exception, see Figure 9, page 8). LINEAL GAIN PART NO. DESCRIPTION GAIN Georgian Fireplace 66 1/2" 12-12DM 12-12HT Pipe Section 10 5/8" 18-12DM 18-12HT Pipe Section 16 5/8" 24-12DM 24-12HT Pipe Section 23 5/8" 36-12DM 36-12HT Pipe Section 34 5/8" 48-12DM 48-12HT Pipe Section 46 5/8" RLT-12D RLT-12HT Round Termination 7 3/4"* STL-12D Square Chase-Top with Slip Section 7" to 15"* * The lineal gain for the terminations is measured to the flue gas outlet height. Secure to Collars with Metal Tape, Screws or Straps (Min. 1/4" x 20" size) Air Inlet Location Must Allow For Bushes or Snow 15" Galvanized Outer Pipe Hemmed End 12 3/8" Stainless Inner Pipe Air Inlet Eyebrow Vent Hood Required for Wall Installation Vented Crawl Space (Check Local Codes Before Installing in a Vented Crawl Space) Figure 6 - Lineal Gain Fi...
Other models in this manual:Fireplaces - (V)G36H (1.09 mb)
Fireplaces - (V)G36HR (1.09 mb)
Fireplaces - (V)G36R (1.09 mb)