The Direct Vent System; Roof Mounted Terminations - Montigo L52DF-ST L-Series Installation & Maintenance Manual

Section 3:
Venting
Montigo supplies a variety of direct venting and termination options.
The direct vent termination location MUST be selected such that
it is the highest point in the venting assembly. It should also be
selected such that it provides the shortest vent run possible. Should
it be impossible to ensure that the termination is the highest point or
should it be impossible to meet the venting guidelines laid out below
please contact your Montigo dealer to discuss power venting options.
NOTES FOR PLANNING VENTING:
Venting can terminate through the roof or through an
„
exterior wall.
Refer to Appendix A - Termination Locations to ensure the
„
planned termination location is acceptable.
Once the termination location has been established, refer
„
to the appropriate section below for installation details
All fireplaces shipped from the factory are Top vent.
„
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, (asphault 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 11 to 11c *).
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.
„
Part No. XG0811 -100511
Installation

Roof mounted Terminations

The following details are some possible configurations for Roof
mounted terminations. See below.
Figure 11. Top vent, Roof mounted termination with no offset in
vent run.
Figure 11a. Top vent, Roof mounted with 1 offset (1 offset= two 90°
bends).
L52DF-ST* Indoor Gas Fireplace
PVTK1 Termination
PVTK1 Termination
Page 7