Vanguard VYD18NRB Owner's 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 inches up (for all models). If noncombustible
material is less than 12", you must install the
fireplace hood accessory (24" and 30" Mod-
els Only). Even if noncombustible material is
more than 12", you may need the hood ac-
cessory to deflect heat away from your mantel
shelf. See Figure 5, page 10, and Figures 6
and 7 for minimum clearances.
10"
8"
6"
2 ½"
Minimum
(A)
Noncombustible
Material
12"
8"
Minimum Non-
Combustible
Material Height
Figure 6 - Minimum Mantel Clearances
Without Using Hood
12"
10"
8"
6"
2½"
Minimum
Noncombustible
Material
Hood
(GA6050 or
GA6053)
Figure 7 - Minimum Mantel Clearances
When Using Hood
113093-01J
INSTALLATION
Mantel Shelf
Underside of
Mantel Shelf
Log Set
24"/30"
24"
18" 20" 22" Models
20" 18" Model
8" 14" 17"
Top of
Fireplace
Opening
Distances to
Underside of
Mantel
Mantel Shelf
Undersid
of Mantel
Shelf
8" 12" 15" 18" 20"
Min.
Top of
Fireplace
Distances to
Opening
Underside of
Mantel
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Continued
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.
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
clearances required. Follow minimum clear-
ances shown in Figure 7 when using hood.
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the
firebox may become hot to
the touch. If installed properly,
these temperatures meet the
requirement of the national
product standard. Follow all
minimum clearances shown in
this manual.
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
of the following:
• operate the logs only with the
flue damper open
• raise the mantel to an accept-
able height
• remove the mantel
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