Desa VCM-50U - Manual (Page 10)

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Figure 5 - Ventilation Air from Outdoors
Outlet
Air
Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air
Ventilated
Crawl Space
To
Crawl
Space
To Attic
ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the floor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
WARNING: A qualified ser-
vice person must install firebox.
Follow all local codes.
WARNING: Never install
firebox
• in a bedroom or bathroom*
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36" from
front or 42" from top of firebox;
for side clearances see Figure
4, page 11
• in high traffic areas
• in windy or drafty areas
* Unless installed log set is rated
at 10,000 Btu/hr or less.
CAUTION: Log heaters
installed in this firebox create
warm air currents. These currents
move heat to wall surfaces next
to firebox. Installing firebox next
to vinyl or cloth wall coverings or
operating firebox where impuri-
ties (such as, but not limited to, to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls or cause odors.
INsTAllATIoN
NOTICE: The firebox identifica-
tion label (including model num-
ber, serial number, clearances,
etc.) is located on a chain under
the bottom refractory.
IMPORTANT: Vent-free gas log heaters add
moisture to the air. Although this is beneficial,
installing firebox in rooms without enough
ventilation air may cause mildew to form from
too much moisture. See, page 8.
IMPORTANT: Make sure the firebox is level.
If firebox is not level, log set will not work
properly.
Note: Your firebox is designed to be used in
zero clearance installations. Wall or framing
material can be placed against any exterior
surface on the rear, sides, top or bottom of
your firebox, except where standoff spacers
are integrally attached. If standoff spacers are
attached to your firebox, these spacers can
be placed directly against wall or framing ma-
terials. Use the dimensions shown for rough
opening to create the easiest installation.
Use dimensions shown for rough openings
to create the easiest installation (see Built-In
Firebox Installation, page 12).
AIr For CoMBUsTIoN ANd VeNTIlATIoN
Continued