Clearances; Installing Supplied Metal Header; Installing Nailing Flange Extension - Montigo L38DF-ST Indoor Installation & Maintenance Manual

Clearances

1" clearance is maintained on sides and bottom of vent runs and 2"
above horizontal vent runs to any combustible material.
L38DF-ST* 17½"
† NOTE: Clearance from top of fireplace to a combustible ceiling
within the fireplace enclosure.
When installing a shelf over the top of the fireplace, the following
guidelines must be adhered to:
For Side Vent applications, the minimum clearance is 10" from the
top of the fireplace to the underside of any combustible shelf.
For Top Vent applications, the minimum clearance is 17½" from the
top of the fireplace to the underside of any combustible shelf.
XG0810 - 070714
Installation
10" 1" 0" 4"
Installing the supplied non combustible header
Included with the L38DF-ST* gas fireplace are two metal headers
made of galvanized steel. The metal headers must be installed after
the fireplace has been back framed in place. Install metal headers at
34 1/2" from the base of the unit, as shown in figure 6.
34 1/2"
Figure 6. Installing the supplied metal headers, both sides typical.
Installing the Nailing Flange Extension
Once the fireplace is placed into the rough framed opening, the
supplied Nailing Flange Extension (Part No. H38074) must be fasten
securely into place, with nails or wood screws. as shown in Figure 7.
Figure 7. Installing the Nailing Flange Extension.
Note: The nailing flange extension can be substituted with a piece
of NON-Combustible material of the same size and thermal char-
acteristics, ie: cement board or equivalent. This is recommended in
applications where the facing materials will not adhere to the metal
nailing flange.
L38DF-ST* Indoor Gas Fireplace
40"
Supplied
Non-Combustible
Header
6"
Page 7