20
FIGURE 48
BGD42CF ONLY
ADJUSTABLE FIRESTOP INSTALLATION
Apply a bead of caulking all around the edge of the opening and place the fi restop top, so that the vent shield covers the top of the vent within the opening.
The length of the vent shield may be cut shorter for combustible walls that are less than 8 1/2" thick but the vent shield must extend the full depth of the combustible wall.
Place the fi restop bottom against the fi restop top and secure the two together. Adjust the assembly to ensure it is tight to the vent. Secure fi restop to wall. Ensure that both spacer and shield main- tain the required clearance to combustibles. Once the vent pipe is installed in its fi nal position, apply sealant between the vent pipe and the fi restop spacer. This restricts cold air from being drawn into the room or around the fi replace. See Figures
VENT SHIELD
FIGURE 49a
FIRESTOP TOP
FIRESTOP BOTTOM
FIGURE 49b
FIGURE 49c
Where the opening in the outside wall has been cut 13" tall to provide 2" clearance from the vent pipe, terminal extension plate
VERTICAL INSTALLATION
1.Determine the air terminal location, cut and frame 9 3/4" for the BGD36CF(G), or 10 3/4" for the BGD42CF square opening in the ceiling and an opening in the roof to provide the minimum 1" clearance between the fi replace vent pipe and any combustible material. Try to center the exhaust pipe location midway between two joists to prevent having to cut them. Use a plumb bob to line up the center of the openings.
DO NOT FILL THIS SPACE WITH ANY TYPE OF MATERIAL.
A vent pipe shield will prevent |
|
any materials such as insula- |
|
tion, from fi lling up the 1" air | BGD36CF(G) = 9 3/4” |
space around the pipe. Nail | |
headers between the joist for | BGD42CF = 10 3/4” |
extra support. |
|
2.Apply a bead of caulking
(not supplied) to the frame- work or to the Wolf Steel vent pipe shield plate or equivalent (in the case of a fi nished
FIGURE 50
ceiling), and secure over the opening in the ceiling. A
firestop must be placed on the bottom of each framed opening in a roof or ceiling that the venting system passes through.
Apply a bead of caulking all
around and place a fi restop
spacer over the vent shield toFIGURE 51 restrict cold air from being drawn
into the room or around the fi replace. Ensure that both spacer and shield maintain the required clearance to combustibles. Once the vent pipe is installed in its fi nal
position, apply high temperature sealant
3.In the attic, slide the vent pipe collar down to cover up the open end of the shield and tighten.
This will prevent any materials, such as insulation, from fi lling up the 1" air space around the pipe.
FIGURE 52
