Firestop spacers are not available for nor are they re- quired on vertical walls.
DO NOT put any sealant around the area where the outer pipe slides through the firestop spacer. If you seal this area, it may cause a fire hazard.
Canadian Requirements
for Insulation Shield
In Canada, an attic insulation shield is required to pre- vent attic insulation from contacting the chimney sec- tion. Framing dimensions for the chimney hole should measure 14¹⁄₂" x 14¹⁄₂" (368 x 368mm)(SK8). (An attic shield MUST be installed on top of attic joists (above the floor level). (Fig. 19)
NOTE: In the U.S., it is a good idea, although not al- ways required, to install an attic insulation shield where
Install the attic insulation shield with the flanges on its base extending down into the framing hole. Nail each corner of attic insulation shield to the framing members of the ceiling hole using 8d nails. Attic shields are not required at the roof.
Continue Installing Pipe to Complete Run
Continue attaching pipe sections to complete system to next level always being careful that the pipe is firmly snapped locked in place before proceeding to next pipe section.
Chimney Supports
If chimney supports are required, they are installed the same as elbows. Nail chimney support straps to ad- jacent structural framing, as shown on Figure 8, Page
8.Bend straps as necessary and make sure they are secure so they will support the weight of the chimney. A chimney support is 2¹⁄₂" (64mm) long when installed. Consider this dimension when determining how many straight chimney sections are needed.
NOTE: Chimney supports are generally used in long runs in a chase installation. A chimney support can- not be mounted directly to the fireplace.
Additional Ceilings
If you encounter additional ceilings, repeat same steps required for first ceiling installation. Refer to firestop
illustration on Page 12, Figure 18.
Penetrating the Roof
Run pipe to roofline. Since chimney system must be vented to the
If a chase is used, refer to the installation manual pro-
vided with the termination cap.
STR/CVR Series Woodburning Fireplaces
Attic Insula- tion Shield
Nails
(4 required)
Attic Joist
Base
Ceiling Flanges
FP263
Fig. 19 Attic shield installlation (Canadian requirement).
Locate Chimney Centerpoint on Roof
Use same procedure detailed in locating centerpoint of the flue system.
Drive a nail up through roof at the centerpoint. This will determine center point on outside of the roof.
Cut and Frame Roof Hole
Size of roof hole varies with the type of chimney termi- nation installed. Refer to installation instructions pro- vided with the chimney termination to find correct size of roof hole.
NOTE: The air space dimensions in this manual that pertain to model 11CF chimney pipe have been changed from 2" to 1" (51 - 25mm) clearance for first joist space only. This change only applies to Majes- tic Fireplaces models STR42 and CVR42 fireplaces. Because of framing concerns these models, and only these models, have been tested and approved at the reduced clearance. In all other cases the minimum air space referred to on the UL label on the 11CF pipe must be maintained. A special firestop is shipped with these units that will maintain the 1" (25mm) clearance at the first joist. The chimney hole size for this firestop will be 15¹⁄₂" (394mm). Refer to Figure 18 for ceiling joist installation instructions.
There must be an air space (1¹⁄₂" (38mm) with SK8 and 1" (25mm) with 11CF) between outermost portion of chimney sections and any adjacent combustible sur- faces. (Fig. 20) (Combustible surfaces include burnable materials such as: ceiling members, joists, flooring, combustible insulation and roof structures.)
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