Section 3-2: Installing Pvtk-1; Section 3-2-1 Venting Layout - Montigo P42DF Installation & Maintenance Manual

P42DF* Indoor Gas Fireplace
Section 3-2:
INSTALLING A ROOF MOUNTED
DIRECT VENT TERMINATION (PVTK-1)
This section applies to installations where the direct vent termi-
nation will be roof mounted.
Section 3-2-1:
VENTING LAYOUT
Selection of components and details of venting lay out should
adhere to the following guidelines:
The maximum termination point is 32' above the fireplace (NOTE:
„
if the maximum termination height is used, the flame pattern
may be affected).
The Vertical termination must be a minimum 2' higher than where
„
the termination exits the roofing materials, (asphalt shingles,
cedar shakes, etc). This distance should be measured from the
high side of the roof slope where the flue flashing intersects the
roofing materials. (see Figures 8 to 8c *).
Termination location must be a minimum 6' from a mechanical
„
air inlet.
Termination location must be a minimum 18" from a parapet wall.
„
A maximum of two offsets (each offset is made up of 2-90°
„
bends) may be made.
Install a firestop at any location where venting passes through
„
combustible materials and construction.
Utilize support straps, or support plates, and rings (as required)
„
to meet acceptable building practices.
Install all roof flashing and storm collars as shown.
„
Roof mounted Terminations
The following details are some possible configurations for Roof mounted
terminations. See below.
PVTK1
Termination
32' max.
Figure 8. Top vent, Roof mounted termination with no offset in vent run.
Page 8
Installation
32' max.
Figure 8a. Top vent, Roof mounted with 1 offset (1 offset= two 90°
bends).
32' max
2' min.
Support ring
Support plate
Firestop
Figure 8b. Top vent, Roof mounted with 2 offsets (1 offset= two 90°
bends).
PVTK1
Termination
Obstacle
PVTK1
Termination
2' min.
Obstacle
2'
2' min.
Support ring
Support plate
Firestop
Support straps or
support plate & ring
Firestop
Support plate
& ring
Firestop
Firestop
XG0195 - 030712