Comfort Glow CGD3924NT, CGD3930NT, CGD3018NT, CGB3924NT, CGB3930NT, CCL3018NT, CCL3924NT, CCL3930NT Owner's Operation And Installation Manual page 8

VENT-FREE NATURAL GAS LOG HEATER
INSTALLATION
Continued
Minimum Clearances For Side
Combustible Material, Side Wall,
and Ceiling
A. Clearances from the side of the fire-
place cabinet to any combustible ma-
terial and wall should follow diagram
in Figure 5.
Example: The face of a mantel, book-
shelf, etc. is made of combustible ma-
1
terial and protrudes 3 / " from the wall.
2
This combustible material must be 4"
from the side of the fireplace opening
(see Figure 5).
Note: When installing your gas logs
into a manufactured firebox, follow
firebox manufacturer's instructions for
minimum clearances to combustible
materials.
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42 inches.
Example
*Minimum 16 inches from Side Wall
Figure 5 - Minimum Clearance for Com-
bustible to Wall
NOTICE: Manual control heaters
may be used as a vented product.
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.
For more information, visit www.desatech.com
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" and 30" models only). See Figure 6 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.
Noncombustible
Material Distance (A)
12" or more
Between 8" and 12"
*
Less than 8"
Heat Resistant
Material
Figure 6 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
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" and 30" models only). Even
if noncombustible material is more than
12", you may need the hood accessory to
deflect heat away from your mantel shelf.
See Figure 6 and Figures 7 and 8 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.
Requirements for
Safe Installation
Noncombustible material okay.
24" or 30" Models: Install fireplace hood acces-
sory (GA6050, GA6052, or GA6053 see Accesso-
ries, page 27).
18" Model: Noncombustible material okay.
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.
(A)
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