Desa VS18NV Owner's Operation And Installation Manual page 11

INSTALLING
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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 14.
Minimum Non Combustible Material Clearances
If Not Using Mantel
Note: If using a mantel, go to page 12. If not using a mantel, follow the informa-
tion on this page.
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" up (for all models). If non combus-
tible material is less than 12", you must install the fireplace hood accessory (24"
and 30" models only). See chart below and Figure 5 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.
Non-Combustible
Material Distance (A)
12" or more
Between 8" and 12"
Less than 8"
Figure 6 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
NOTICE
Requirements for
Safe Installation
Non combustible material OK.
24" or 30" Models: Install fireplace hood
accessory (GA6050 or GA6052, see
Accessories, page 35).
18" Model: Non combustible material OK.
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.
Heat Resistant
Material
(A)
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