Desa INTERNATIONAL UNVENTED (VENT-FREE) GAS LOG HEATER Owner's Operation And Installation Manual page 9

INSTALLATION
Continued
Carefully follow the instructions below. This will ensure safe
installation into a masonry, UL127-listed manufactured fireplace,
or listed vent-free firebox.
Minimum Clearances For Side Combustible
Material, Side Wall, and Ceiling
A. Clearances from the side of the fireplace cabinet to any combus-
tible material and wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf, etc. is made of
combustible material and protrudes 3
combustible material must be 4" from the side of the fireplace
cabinet (see Figure 4).
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 4 - Minimum Clearance for Combustible 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 fire-
place opening is not needed. Go to Installing Damper
Clamp Accessory for Vented Operation, page 11.
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 on this page.
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 5 for minimum clearances.
For more information, visit www.desatech.com
For more information, visit www.desatech.com
108114
Installation and Clearances For Vent-Free Operation (Cont.)
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 inches up. If noncombustible material is less than
12", you must install the fireplace hood accessory. Even if noncom-
bustible material is more than 12", you may need the hood accessory
to deflect heat away from your mantel shelf. See Figure 5 and
1 / " from the wall. This
Figures 6 and 7, page 10, for minimum clearances.
2
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 11.
*
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.)
Above Fireplace
Noncombustible
Material Distance (A)
12" or more
Between 8" and 12"
Less than 8"
Heat Resistant
Material
INSTALLATION
Requirements for
Safe Installation
Noncombustible material OK.
24" or 30" Models: Install
fireplace hood accessory
(GA6050, GA6052, or
GA6053 see Accessories ,
page 38).
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)
9 9