Vanguard SBJ18VNA Owner's Manual - Installation
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114744-01F
11
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" thick. With sheet
metal, you must have noncombustible ma-
terial 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" 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 Figures 5, 6 and 7, 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.
INSTALLATION
Continued
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Noncombustible
Material Distance (A)
Requirements for Safe
Installation
12" or more
Noncombustible mate-
rial OK.
Between 8"
and 12"
2 4 " M o d e l s : I n s t a l l
fireplace hood acces-
sory (GA6050, GA6052,
GA6053, see Accesso-
ries, page 27).
18" Model: Noncombus-
tible material OK.
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 and
damper clamp installed.
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Figure 7 - Minimum Mantel Clearances
When Using Hood
Minimum
Noncombustible
Material
8"
Min.
12"
15"
18"
All minimum
distances are
in inches
20"
2
1
/
2
"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052
or GA6053)
Top of
Fireplace
Opening
Underside of
Mantel Shelf
Log Sets
18", 24"
Models
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
12"
8"
(A)
18"
14"
20"
17"
22"
19"
24"
20"
All minimum
distances are
in inches
Log Set
24" Models
18" Model
2
1/2
"
6"
8"
10"
Mantel Shelf
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
listed below, you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
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 clear-
ances required. Follow minimum clearances
shown in Figure 7 when using hood.