Desa CGD3018 - Manual (Page 8)

111160-01B
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8
INSTALLATION
Continued
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 fire-
place opening is not needed. Go to
Installing Damper
Clamp Accessory for Vented Operation, page 10.
Minimum Clearances For Side Combustible Mate-
rial, Side Wall, and Ceiling
A. Clearances from the side of the fireplace cabinet to any com-
bustible material and wall should follow diagram in Figure 5.
Example: The face of a mantel, bookshelf, etc. is made of
combustible material and protrudes 3 1 /
2
" from the wall. 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 fire-
box, 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.
Figure 5 - Minimum Clearance for Combustible to Wall
If Using Mantel
You must have noncombustible material(s) above the fireplace
opening. Noncombustible 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). 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 Install-
ing Damper Clamp Accessory for Vented Operation, page 10.
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. Noncombustible 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 Install-
ing 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" or 30" Models: Install
fireplace hood accessory
(GA6050, GA6052, or
GA6053 see
Accessories,
page 28).
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 6 - Heat Resistant Material (Slate, Marble, Tile, etc.)
Above Fireplace
*Minimum 16 inches from Side Wall
*
Example
INSTALLATION
Installation and Clearances for Vent-Free Operation (Cont.)