TOA Electronics CST-38 - Manual (Page 18)

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 18
GAS LINE INSTALLATION
The CST and CPF fireplaces have been ap-
proved to accept a
¹⁄₂" (13 mm) gas line for an
approved gas appliance. Always have the appli-
ance installed by a qualified, licensed plumber
in accordance with all local building codes. The
gas line may enter either end of the fireplace.
CAUTION: PLUMBING CONNECTIONS SHOULD
ONLY BE PERFORMED BY A QUALIFIED, LI-
CENSED PLUMBER. MAIN GAS SUPPLY MUST
BE OFF WHEN PLUMBING GAS LINE TO FIRE-
PLACE OR PERFORMING SERVICE.
If you’re installing a gas line, connect it before
the fireplace is framed and enclosed in the
finished wall. The gas knockout is determined
by a 1
¹⁄₈" (29 mm) round indentation located
at the bottom and slightly off center in the side
refractories. THE KNOCKOUT IS ALWAYS RE-
MOVED FROM INSIDE THE FIREPLACE. DO
NOT REMOVE THE KNOCKOUT UNLESS YOU
ARE INSTALLING A GAS LINE. If removal is
attempted from the outer wrapper, side-re-
fractory damage may occur. With a medium-
sized hammer, lightly tap the surface of the
indentation. The refractory material is very
thin in this area and is easily removed. Once a
small hole has been made, continue tapping
until you have reached sufficient diameter for
the gas line to fit through. The entire knockout
does not have to be removed. Remove insula-
tion in the gas line channel.
Install a ¹⁄₂" (13 mm) gas supply line through
fireplace wall for connection to a decorative
gas appliance inside the firebox. Outside, the
gas supply line must connect to a gas shut-off
valve usually recessed flush into the wall or
floor. The valve should be controlled by a
removable valve key for safety.
Always plumb gas line installation per local
codes. Check all connections with soap suds;
leaks will bubble. Never test any gas line con-
nection with a match or open flame.
IMPORTANT: REPACK INSULATION MATERIAL
IN SQUARE HOLE AROUND GAS LINE, INTE-
RIOR AND EXTERIOR, TO SEAL.
In Canada, this provision is intended for con-
nection to a decorative gas appliance only in
accordance with the latest National Gas Instal-
lation Code, CAN 1-B149.1. This complies
with the ULC S610 standard.
For all areas other than Canada, this provision
is intended only for connection to a decorative
gas appliance incorporating an automatic shut-
off device and complying with the standard for
Decorative Gas Appliances for installation in
vented fireplaces, ANSI Z21.60. Install in ac-
cordance with the National Fuel Gas Code,
ANSI Z223.1.
CAUTION: WHEN USING THE DECORATIVE
GAS APPLIANCE, THE FIREPLACE DAMPER
MUST BE SET IN THE FULLY OPEN POSITION.
COLD CLIMATE INSULATION
If you live in a cold climate, it is especially
important to seal all cracks around the fire-
place and wherever cold air could enter the
room with noncombustible material. Surround
material must be caulked where it meets the
black metal facing of the fireplace to avoid
cold air intrusion. Use noncombustible caulk-
ing material only on fireplace facing to seal.
Also, the outside air inlet duct should be
wrapped with noncombustible insulation to
minimize the formation of condensation. Do
not place insulation materials directly against
the chimney sections.
Note: 2" (51 mm) air space must be preserved
for all materials extending for any continuous
length adjacent to the chimney.
It is especially important to insulate between
the studs of an outside chase cavity and under
the floor if the floor is above ground level. Do
not place insulation directly against the fire-
place or chimney system.
FIREPLACE FINISHES
Mantels and Trim
It is sometimes best to frame your fireplace
after it is positioned and the chimney is in-
stalled. Frame enclosure for chimney and
fireplace with 2 x 4’s (or heavier) lumber.
Note: The header may rest on the two (2) metal
top spacers on top of the unit but the header
must not be notched to fit around the spacers.
In Canada, the minimum height for a combus-
tible mantel is 18" (457 mm) above the opening.
Figure 54 shows typical Canadian installation.
In installations other than Canada, combustible
mantels and trim may be installed 12" (305mm)
above the opening as per NFPA 211, Section 7-
3.3.3. and
Figure 55. If a mantel is of a non-
combustible material, it is exempt from the
requirements as long as it does not interfere
with the operation of glass doors.
Figure 54
Figure 55
Hearth Extensions and Wall Shields
A hearth extension must be installed with all
fireplaces. Its purpose is twofold. It protects a
combustible floor in front of the fireplace from
both radiant heat and sparks and it distin-
guishes the prescribed hearth extension area
from other non-protected surfaces.
The hearth extension must extend beyond the
front and both sides of the CPF-38 and CST-38
fireplace side openings. A hearth extension on
the end opening of the CPF-38 fireplace is
optional. Use a hearth extension constructed
of a durable noncombustible material having
an equal or greater insulating value of k=.84
BTU IN/FT
2 HR ° F or a thermal resistance that
equals or exceeds r=1.19 HR ° F FT 2 /BTU IN. A
minimum ³⁄₈" (10 mm) thick noncombustible
material is all that is required over a noncom-
bustible or slab floor.
18"
(457 mm)
Min.
Finished Wall
Spacer
Combustible
Mantel
and Trim
8"
(203 mm)
Max.
False
Header
Typical Canadian Installation
Fireplace Opening
12"
(305 mm)
Min.
5 ¹⁄₄"
(133 mm)
Finished Wall
Spacer
Combustible
Mantel
and Trim
8"
(203 mm)
Max.
False
Header
Typical U.S. Installation
1 ¹⁄₂"
(38 mm)
Fireplace Opening