Desa VYM27NR Owner's Operation And Installation Manual page 8

VANGUARD FLAME MAX
UNVENTED NATURAL GAS LOG HEATER
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 fireplace opening is not
needed.
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 both fireplace openings. Noncom-
bustible materials (such as slate, marble,
tile, etc.) must be at least 1/2 inch thick.
With sheet metal, you must have noncom-
bustible material behind it. Noncombus-
tible material must extend at least 8" up (for
all models). If noncombustible material is
less than 12", you must install the fireplace
hood accessory. See Figure 5 at right 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.
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. Even if noncombustible 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, page 9, for minimum clearances.
Noncombustible
Material Distance (A)
12" or more
Between 8" and 12"
Less than 8"
Heat Resistant
Material
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
8
®
Requirements for
Safe Installation
Noncombustible material OK.
Install fireplace hood accessory (GA6050, GA6052
or GA6053, see Accessories , page 24).
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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