Vermont Casting ODSHR42 - Manual (Page 15)

15
ODSHR Outdoor Woodburning Fireplace
20002264
Side Wall Protection
Adjacent combustible side walls that are within dimen-
sions shown in Figure 25 of fireplace opening must
be protected with CFM Corporation Wall Shield Model
SP40 or a specifically built wall shield described in
Figure 24.
The special wall shield design described in Figure 24 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. CFM Corporation - EH2416, K = .458,
1 inch thick required.
Hearth Installation
A hearth extension is required to protect a combustible
floor in front of the fireplace. Refer to Figure 25 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 25 must be a
durable noncombustible material with a minimum (total)
Rt value of 1.09; refer to Figure 26 for examples. The
overall height (above a combustible floor), depth and
width must be as indicated, with the extension centered
to the fireplace opening.
FP838
Wall shield
5/25/99 djt
40"
Min.
40" Min.
Decorative Non-
combustible Rigid
Covering
Noncombustible Insula-
tion
R
T
= 1.85 Min.
(Manville Ceraform 126
- 1/2" Thick or CFM
Corporation EH2416 - 1"
Thick)
Fig. 24 Noncombustible wall shield dimensions.
FP838
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
WITHOUT
Noncombustible
Surround Facing
Minimum Hearth Extension Dimensions
(for On-Site Construction)
12"
20"
12"
66"
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
Safety strips
must overlap
¹⁄₂ " minimum
May install
noncombustible
decorative
covering
OR .018" min.
sheet metal
Fireplace
Hearth
Combustible
Floor
Minimum
Insulation
Value "R":
4" Min.
Firebox
Opening
22" - Min. clearance
to combustible
perpendicular wall
18" - Min. clearance
to combustible
perpendicular wall when
using noncombustible wall shield*
Side
Wall
Side
Wall
14"**
32¹⁄₂"**
18" 18"
39¹⁄₂"
4" Brick
(Example material)
Combustible material permitted within shaded area.
* Noncombustible wall shield requires 1" CFM Corporation
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.
FP532b
Hearth extension dimension
1/5/00 djt
4"
Shaded area starts
3/4" away from
edge of unit
FP532b
Fig. 25 Combustible side wall protection and hearth extension dimensions.
The top of insulation must be covered with a non-com-
bustible decorative covering or a piece of .018” mini-
mum sheet metal, to protect hearth extension material.
(Fig. 25)
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. 25, and 27 - 29)
WARNING: HEARTH EXTENSION MUST BE IN-
STALLED IN ACCORDANCE WITH FIGURE 24.