Montigo R320-ST - Manual (Page 10)

Step2. Back-framing the Fireplace; installing 2 x 4's, (Typical Both
sides). Ensure you have the required 2 x 4's to complete the project.
Cut Four (4) - 2 x 4's to fit under the front & rear fireplace throat,
(horizontal), fit & remove. These must be no closer than 3" below
the bottom edge of glass. Next, cut the short 2 x 4's, to fit at each
end under the previous Horizontals.
Next, cut the required quantity of short filler 2x4's under the lower
Horizontal. The number of pieces will be determined by the length,
and model of fireplace. (Follow Typical building codes and practices
when spacing). Next, cut the Required Left and Right Vertical 2 x 4's
and space at 3" from side of apron. Install the Two Non-combustible
Headers (one per side), supplied by Montigo, as per Figure 3.
Step1:Removescrewsfromperimeterofglassasshown
below. The screws will be used to fasten the cement board,
provided by Montigo, to the unit in the finishing stages. Remove
the marked screws above and below the glass. Place provided
template to check screw hole positioning. Transfer template to
provided cement board to pre drill pilot holes. Refer to figures
below for Screw locations.
R420
4 Screws Top
&
4 Screws
Bottom
Front View Side View
Figure 1 Sec.3 R320 Fireplace Screw Locations. Both Sides are Typical.
R320
3 Screws Top
&
3 Screws
Bottom
Front View Side View
Figure 2 Sec.3 R420 Fireplace Screw Locations. Both Sides are Typical.
Section3:Finishing
Figure 3 Sec.3 Fireplace installation, (Ensure you maintain the 3" clearance to combustibles) Both Sides are Typical.
1"
Clearance
1"
Clearance
3” Clearance
to combustibles
3" Clearance
to combustibles
Non-combustible Header
(Supplied by Montigo)
2 X 4, (Top
Horizontal)
2 X 4, (Bottom
Horizontal)
2-pcs 2 x 4, (vertical)
Both Sides Typical
Both
Sides
Typical
First wood header installed
at 19” from top of glass
3” Clearance to
combustibles
First
combustible
(2) 2X4s
Space supplied
Non-Combustible Header(s)
to allow 6” of Cement board
to be fastened to
2 X 4 fillers, (Vertical) use typical
building practices when spacing
Space between
2 x 4s
R320 = 47½”
R420 = 59½”
Note: Images are shown without screens for clarity
purposes. However, your fireplace should not be
operated without proper installation of screens.
R320-ST & R420-ST Power Vent Indoor Gas Fireplace
Page 10
XG0774 - 150121
Installation