Vanguard VYD18NRB Owner's Operation page 10

LOG SIZING REQUIREMENTS
Minimum Firebox
Log
Size Height
18" 17"
24" 17"
30" 17"
* Measured at 14" depth.
Minimum Clearances For Side Combustible
Material, Side Wall and Ceiling
A. Clearances from the side of the fireplace
cabinet to any combustible material and
wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
1
protrudes 3 / " from the wall. This com-
2
bustible 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".
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.
Example
*Minimum 16 inches from Side Wall
Figure 4 - Minimum Clearance for
Combustible to Wall
10
INSTALLATION
Front Rear *
Depth Width Width
14" 24"
14" 28"
14" 34"
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Continued
Minimum Noncombustible Material
Clearances
Note: If using a mantel proceed to If Using
Mantel, page 11. If not using a mantel, follow
the information on this page.
20"
You must have noncombustible material(s)
21"
above the fireplace opening. Noncombustible
24"
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.
Noncombustible
Material Distance
(A)
12" or more
Between 8" and
12"
Less than 8"
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
If Not Using Mantel
Requirements for Safe
Installation
Noncombustible material
okay.
24" or 30" Models: Install
fireplace hood accessory
(GA6050 or GA6053 see
Accessories, page 31).
18" Model: Noncombus-
tible material okay.
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.
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