Desa Tech CRL3124PA/NA - Manual (Page 10)

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INSTALLATION
Continued
Noncombus-
tible Material
Distance (A) Requirements for Safe
Installation
12" or more Noncombustible material
okay.
Between 8"
and 12" 24" Models: Install fireplace
hood accessory (GA6050,
GA6052 or GA6053 see
Accessories, page 38).
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.
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantel shelf. If you do not meet the clearances
in Figure 6, page 11 you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between man-
tel shelf and top of fireplace opening, a hood
is not required (see Figure 6, page 11).
Determining Minimum Mantel Clearance
When Using a Hood
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clear-
ances shown in Figure 7, page 11 when
using hood.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
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 12.
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 infor-
mation 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" thick. With sheet metal, you
must have noncombustible material behind
it. Noncombustible material must extend at
least 8" up. If noncombustible material is less
than 12", you must install the fireplace hood
accessory (24" models only). See Figure 5 for
minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 11.
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" thick. With sheet metal, you
must have noncombustible material behind it.
Noncombustible material must extend at least
8" up. If noncombustible material is less than
12", you must install the fireplace hood acces-
sory (24" 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 5 and Figure 6 and 7
on page 11 for minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 12.