Vanguard Heating Gas Log Heater - Manual (Page 12)

12
103515
INSTALLING
Continued
Minimum Non Combustible Material Clearances
If Using Mantel
You must have non combustible material(s) above the fireplace opening. Non
combustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch
thick. With sheet metal, you must have non combustible material behind it. Non
combustible material must extend at least 8 inches up (for all models). If non
combustible material is less than 12", you must install the fireplace hood accessory
(24" and 30" models only). Even if non combustible material is more than 12", you
may need the hood accessory to deflect heat away from your mantel shelf. See
chart below and Figures 6 and 7 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 14.
Figure 6 - Minimum Mantel Clearances Without Using Hood
If above minimum clearances are not met, you must have a hood. Follow
minimum clearances shown in Figure 7 on page 13 when using hood.
Non-Combustible Requirements for
Material Distance (A) Safe Installation
12" or more Non combustible material OK.
Between 8" and 12" 24" or 30" Models: Install fireplace hood accessory
(GA6050 or GA6052, see
Accessories, page 34).
18" Model: Non combustible material OK.
Less than 8" Non combustible 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
If you meet minimum clearance between mantel shelf and top of fireplace opening,
a hood is not required (see Figure 6).
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
Material Height Distances to
Underside of
Mantel
Top of Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
12"
8"
(A)
20"
14"
24 1/2 "
16 3/4 "
27 1/2 "
18 1/2 "
30"
20"
All minimum
distances are
in inches
Log Set
24"/30" Models
18" Model
2 1
/2 "
6"
8"
10"