8
104385
UNVENTED NATURAL GAS LOG HEATER
CGS2718N, CGS3124N, CLD3018N,
CLD3924NT, and CCL3930NT(A)
INSTALLATION
Continued
Heat Resistant
Material
(A)
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note:
If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible material
must extend at least 8" up (for all models). If
noncombustible material is less than 12", you
must install the fireplace hood accessory (24"
model only). See Figure 5 at right for mini-
mum clearances.
IMPORTANT:
If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
Noncombustible
Requirements for
Material Distance (A)
Safe Installation
12" or more
Noncombustible material okay.
Between 8" and 12"
24" Model: Install fireplace hood acessory (GA6050,
GA6052, or GA6053, see
Accessories, page 25).
18" Model: Noncombustible material okay.
Less than 8"
Noncombustible material must be extended to at
least 8". See
Between 8" and 12", above. If you
cannot extend material, you must operate heater
with flue damper open.
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
NOTICE: You may use non-ther-
mostat heater as a vented prod-
uct. If so, you must always run
heater with chimney flue damper
open. If running heater with
damper open, noncombustible
material above fireplace opening
is not needed. Go to
Installing
Damper Clamp Accessory for
Vented Operation, page 10
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible mate-
rial must extend at least 8 inches up (for all
models). If noncombustible material is less
than 12", you must install the fireplace hood
accessory (24" model only). Even if non-
combustible material is more than 12", you
may need the hood accessory to deflect heat
away from your mantel shelf. See Figure 5
and Figures 6 and 7 on page 9 for minimum
clearances.
IMPORTANT:
If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
