Installing The Nailing Flange; Top Vent Venting Runs - Montigo L52DF Installation & Maintenance Manual

f i r e f e a t u r e
Installing the Nailing
Flange Extension
Once the fireplace is placed into the rough framed opening, and the
supplied steel lintel is in place, (Part No. L42087) (see Figure 2),
the supplied nailing extension must be placed along the top edge of
the fireplace and securely fastened in place to the metal lintel, and
combustible wood framing. Note: The nailing flange extension can be
substituted with a piece of NON-Combustible material of the same
size and thermal characteristics, ie: cement board or equivilent.
Figure 6c. Installing the Nailing Flange Extension.
Converting to Top Vent/ Rear Vent
L52DF Top Vent
Use the following instructions to convert an L52DF Top Vent. For Top
Vent use:
1. Install the 5" inner flue cap on the rear flue outlet and secure the
cap in place with five screws, as shown in figure 7a.
2. Install the 8" outer flue cap on the rear flue outlet, and secure it
with five screws, as shown in figure 7a.
Figure 7a. Flue cap installation, Top Vented L52DF fireplace.
3. Install the flue gasket material and flue cover plate on the rear vent
outlet . Fasten the plate with four screws, as illustrated below.
4. Install the 5" inner flue collar and the 8" outer flue collar in place
on the top vent outlet using 5 screws, as illustrated below.
Figure 7b. Flue collar installation, Top Vented L52DF fireplace.
Part No. XG0185 - 092909
Installation
5" Inner ue Cap Fl
8" Outer ue Cap Fl
5" Inner Flue Collar
8" Outer Flue Collar
Flue Gasket
Flue Cover Plate
L52DF Rear Vent
Use the following instructions to convert an L52DF Only for Rear Vent use:
1. Install the 5" inner flue cap on the top flue outlet and secure the
cap in place with five screws, as shown in figure 8a.
2. Install the 8" outer flue cap on the top flue outlet, and secure it
with five screws, as shown in figure 8a.
Figure 8a. Flue cap installation, Rear Vented L52DF fireplace.
3. Install the flue gasket material and flue cover plate on the top
vent outlet. Fasten the plate with four screws, as illustrated in
figure 8b.
4. Install the 5" inner flue collar and the 8" outer flue collar in place
on the rear vent outlet using 5 screws, as illustrated below.
Figure 8b. Flue collar installation, Rear Vented L52DF fireplace.

Top Vent Venting Runs

For the L52DF Top Vent, there are two types of installations: A) Through-
The-Wall Installations and B) Vertical (Through-The-Roof) Installations.
A) Through-The-Wall Installations
Before you install any venting, you must determine whether the venting
run will be acceptable. Unacceptable venting can affect the fireplace's
combustion.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of the
termination and the horizontal run from the from the fireplace flue
L52DF Flush Indoor Gas Fireplace
8" Outer Flue Cap
5" Inner Flue Cap
Flue Gasket
Flue Cover Plate
8" Outer Flue Collar
5" Inner Flue Collar
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