The Direct Vent System; Section 3-2: Installing A Roof Mounted Termination; Section 3-2-1: Venting Layout; Roof Mounted Terminations - Montigo L52DF-ST Installation And Maintenance Manual

L52DF-ST* Indoor Gas Fireplace
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 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, (asphalt
shingles, cedar shakes, etc). This distance should be mea-
sured from the high side of the roof slope where the flue flash-
ing intersects the roofing materials. (see Figures 7 to 7b).
Termination location must be a minimum 6' from a mechanical
„
air inlet.
Termination location must be a minimum 18" from a parapet
„
wall.
For a more detailed diagram of allowed termination locations,
„
see Appendix A.
A maximum of two offsets (each offset is made up of two 90°
„
bends) may be made.
Firestops must be installed as required by National & local
„
codes.
Ensure all runs are supported with a minimum of 3 supports
„
per 10' of venting.
Install all roof flashing and storm collars as shown.
„
Page 8
Installation

Roof mounted Terminations

The following details are some possible configurations for Roof
mounted terminations.
Figure 6. Top vent, Roof mounted termination with no offset in vent
run.
Figure 6a. Top vent, Roof mounted with 1 offset
(1 offset= two 90° bends).
PVTK1 Termination
PEXT
PEXT-10
Adaptor
Flue
Collar
PVTK1 Termination
XG0811 -100511.1