Assessments - 5, GPA: 4.2
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Insulating Fireplace Enclosure for Cold Climates If you live in a cold climate, it is not required but highly recommended that you insulate fireplace enclosure to eliminate cold air penetration as much as possible. Insulate base of fireplace with a noncombustible insulation rated for a minimum of 300°F. Insulating is very important for outside wall installations over a concrete slab. If fireplace is installed on a platform, insulation should be placed on top of the platform before fireplace is set. (Fig. 9) When a fireplace is installed in a chase or on an outside wall, enclosure should be treated like any outside wall in a home. Insulation should be installed on the inside wall as well as the outside wall(s). In a chase, it is also a good idea to install a firestop at the first ceiling level above the fireplace and enclose the chase with sheeting material. Insulation may then be installed above sheeting material to assure the space around the fireplace is totally protected. (Fig. 3) When installing the chimney, DO NOT caulk between outer pipe and firestop. It is vital that some air be allowed to flow through this very thin gap. CAUTION: WHEN INSTALLING A FIREPLACE IN AN INSULATED ENCLOSURE, BE SURE ALL REQUIRED AIR SPACES ARE MAINTAINED. (Page 12, Fig. 19) FP555 Hard Flat Surface Insulation Platform Chimney Sup- port Strap SKCS8 FP284 Fig. 8 Chimney support installation Fig. 9 Insulating between platform and fireplace. Framing Majestic Fireplaces® ODSR Series "A" Framing can be constructed before or after the fireplace is set in place, however, most installers build the frame before setting the fireplace. Frame fireplace with 2 x 4 lumber or heavier materials. Refer to framing dimensions in Figures 1, 2, 3 or 4 for basic fireplace specifications. NOTE: Framing should be positioned to accommodate wall covering and fireplace facing material. Chimney Setup Since you have already preplanned the chimney run, you should know exactly how the installation is to be accomplished — how much pipe is required, the number of elbows, if any, and type of termination to be used. CAUTION: REPORT TO YOUR DEALERS ANY PARTS DAMAGED IN SHIPMENT, SPECIFICALLY CHECK THE END CONNECTION OF CHIMNEY SECTIONS AND ELBOWS. NOTE: Fireplaces may use CFM Corporation model SK8, or Model S (three wall) chimney systems. The ODSR Series "A" Fireplace will accept the SK8 chimney system as is; but a TWABR adapter collar is required when using the Model S (triple wall) chimney system. The installation procedure described in this manual applies only to the SK8 system. Either chimney system may be used, but may not be mixed. Straight-Up Chimney Installation To mark the centerline of the flue, put the fireplace in final position and measure out from the wall: 9..." (235mm). Mark a spot on the ceiling directly above the fireplace. Draw a line parallel to the back wall through this mark. (Fig. 10) Using a plumb bob positioned directly over center point of fireplace flue collar, mark the ceiling to establish the chimney center point. (Fig. 10) Offset Installation In order to clear an obstruction, it may be necessary to offset chimney from vertical. This is accomplished by using CFM Corporation elbows. Use the 30° Offset Elbow table on Page 5 to determine proper offset and parts required. Each offset requires two (2) elbows. The second elbow is equipped with support straps. It is very important to install the second elbow in each offset as close to the ceiling or support as possible so that the elbow straps can be secured to framing members to help support the weight of the chimney. FP556 Fig. 10 Locate centerline of chimney with plumb line. 9..." (235mm) Chimney Centerline Actual Centerpoint Plumb Line Plumb Bob Imaginary Centerpoint Determine offset distance of your chimney arrangement from centerline of fireplace to centerline of chimney where it is to pass through ceiling. Locate center point of the chimney on ceiling as though a straight up chimney arrangement is to be used. Measure your offset dimension from straight up chimney center point on ceiling. Ceiling Chimney Hole/ Possible Obstructions The size of the hole in ceiling will vary with the angle at which the chimney passes through ceiling. Drive a nail up through ceiling at marked chimney center point. Go to floor above and see where hole will be cut. Check to see where existing ceiling joists and other possible obstructions are located...i.e. wiring, plumbing etc... If necessary, reposition chimney and/or fireplace to avoid obstructions. ABABCeiling Joist Ceiling Framing Members Chimney Hole ABABCeiling Joist Ceiling Framing Members Chimney Hole Majestic Fireplaces® ODSR Series "A" Cutting the Hole Cover fireplace collar opening and cut proper sized chimney hole in chimney. The SK8 pipe allows you to run pipe through a typical 16” on center joist without cutting joists. Framing the Ceiling Hole Frame the ceiling chimney hole as shown in Figure 12. It is good practice to use framing lumber t...
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