Side Wall Protection; Hearth Installation - Majestic ODSR36A Owners Installation And Operating Manual

Majestic Fireplaces

Side Wall Protection

Adjacent combustible side walls that are within the mini-
mum dimensions shown in Figure 24 of fireplace open-
ing must be protected with MHSC Wall Shield Model
SP40 or a specifically built wall shield described below.
The special wall shield design described in Figure 20 is
an alternate method of adding protection to side walls
and can be used in place of the SP40 with the same
wall clearances specified for the SP40. Rt must =1.85
minimum.
Examples of wall shield insulation:
1. Manville - CERAFORM 126, K=.27,
1/2 inches thick
2. MHSC - EH2416, K = .458,
1 inch thick required.
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
4" BRICK
(Example material)
E
F**
A - Min. clearance
C**
to combustible
perpendicular wall
SIDE
B - Min. clearance
WALL
to combustible
perpendicular wall when
using noncombustible wall shield*
Combustible material permitted within shaded area.
* Noncombustible wall shield requires 1" EH2416 insulation
(minimum R Value = 1.85) between decorative
noncombustible rigid covering and combustible wall.
Minimum height and width is 40" x 40".
** Dimension/degree of angle will vary depending on thickness
of noncombustible surround facing.
ODSR36A
ODSR42A
Fig. 24 Combustible side wall protection and hearth extension dimensions.
16
ODSR Series "A"
®
WITHOUT
Noncombustible
Surround Facing
Shaded area starts
1/2" away from
edge of unit.
FIREBOX
OPENING
A B C
16" 12" 48°
406 mm 305 mm
20" 12" 42°
508 mm 305 mm
A hearth extension is required to protect a combustible
floor in front of the fireplace. Refer to Figure 24 for mini-
mum dimensions and mounting detail.
NOTE: Hearth Extension must not cover the air
inlet opening of a fireplace.
The hearth extension described in Figure 24 must be a
durable noncombustible material with a minimum (total)
Rt value of 1.09; refer to Figure 25 for examples. The
overall height (above a combustible floor), depth and
width must be as indicated, with the extension centered
to the fireplace opening.
The top of insulation must be covered with a noncom-
bustible decorative covering or a piece of .018" mini-
mum sheet metal, to protect hearth extension material.
(Fig. 24)
Secure the hearth extension to the floor to prevent
shifting, using trim molding or other similar means at
three (3) outer edges. Seal crack between the fireplace
hearth and hearth extension with a noncombustible
material. (Figs. 24 and 26)
Minimum Hearth Extension Dimensions
(for On-Site Construction)
4"
E
D
May install
noncombustible
decorative
covering
OR .018" min.
SIDE
sheet metal
WALL
4" MIN.
COMBUSTIBLE
FLOOR
D E F
41° 18" 14"
457 mm 356 mm 197 mm
35° 18" 14"
457 mm 356 mm 292 mm
FP594
SR/SC
11/20/97

Hearth Installation

G
H
J
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
FIREPLACE
HEARTH
MINIMUM Safety strips
INSULATION
must overlap
VALUE "R"
���" minimum
G H J
7³⁄₄" 16" 48"
406 mm 1219 mm
11¹⁄₂" 20" 61¹⁄₂"
508 mm 1562 mm
G
FP594
20006811