T4800 INSTALLATION INSTRUCTIONS
9. Marking the Exit Point of the Roof
Locate the point where the chimney will exit the roof by plumbing down to the center of the chimney. Drive a nail up through the roof to mark the center. See Figure 14.
10.Cutting out the Hole in the Roof
Measure to either side of the nail and mark the 17” x 17” or 17” x 26” opening required. This is measured on the horizontal; actual length may be larger depending on the pitch of the roof. Cut out and frame the opening. See Chapter 25 of the Uniform
Building Code for Roof Framing Details.
Be sure to maintain a 2” minimum air space between the chimney section and the roof.
11.Assembling the Chimney Sections Through the Roof
Continue to add chimney sections through the roof opening, maintaining at least a 2” air space.
12.Installing the Roof Flashing
If a roof flashing is to be used, install the roof flashing appropriate to the roof pitch and install a round termination cap following the instructions shipped with the cap.
For chase installations you can use a round termination cap (TR11), a round telescoping termination cap (TR11T) or a square termination cap (ST1175). A chase installation must use a chase top. Chase tops are available from your Heatilator distributor. See page 20 for building a chase.
13.Installing the Outside Air Kit
The outside air kit is supplied as a standard feature with this fireplace and its use is highly recommended to minimize the effects of negative pressure within the structure. It is recommended to utilize the shortest duct run to optimize the performance of the outside air kit. The outside air kit inlet thimble should be positioned at least four feet above the ground level, in a manner that will not allow snow, leaves, etc. to block the inlet.
The outside air kit is installed on the left hand side of the fireplace. Remove the cover plate from the side of the fireplace assembly where the air kit is to be installed. See Figure 15 for handle location.
14.Installing the Chimney Air Kit
When installing the chimney air kit, follow the instructions provided with this accessory.
Figure 14 - Ceiling/Attic Construction
Figure 15 - Air Kit Handle Location
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