Montigo R520 Installation, Operation & Maintenance Manual page 16

C-View Residential R520-R620 Series Indoor Gas Fireplace
combustibles), Figure 16b. Next, cut four vertical 2 x 4's to install between the Upper and Lower Horizontal 2 x 4's, (2-pcs either side). (En-
sure these are placed the required 1" clearance to combustibles). Cut the top 2 x 4 (horizontal) to fit between the vertical 2 x 4's (iether side of
fireplace) as shown. Last, install the Supplied Steel Header 1" above the fireplace throat.
Non-Combustible header,
(supplied by Montigo)
1" clear-
Figure 16b. Fireplace installation, (Ensure you maintain the 1" clearance to combustibles).
Step 4. As shown in Figure 16c; Cut a sheet of Non-combustible concrete board to overlap the new Horizontal & Vertical 2 x 4's, See Figure
16b, Above. Place the Non-combustible wall board above the fireplace throat, allowing 1/8" clearance from the rim above the fireplace opening.
Pre-drill the board with 1/8" drill and secure to framing with Nails, use flat heat sheet metal screws to fasten the board to the metal header.
Sheet metal Screws to attach Non-Combustible
cement board to Steel header.
Pre-drill for Nail fasteners
Combustible framing
Clearance required for
expansion of the fireplace
when in operation.
1/8"
Figure 16c. Non-combustible Board over the Fireplace, (supplied by Montigo).
Page 16
2 x 4
(horizontal)
ance
Installation
2 x 4
2-pcs 2 x 4 (vertical)
(horizontal)
Both Sides Typ.
1" clear-
ance
Non-Combustible cement board,
(supplied by Montigo) or Equiv.
f i r e f e a t u r e
1" clearance
1" clearance
Part No. XG0771 - 0070111