Design Dynamics VTD-18N-PDG - Manual (Page 6)

www.desatech.com 111826-02J 6
INStALLAtION
WARNING: Make sure the
selector switch is in the OFF po-
sition before installing heater.
WARNING: Before installing in
a solid fuel burning fireplace, the
chimney flue and firebox must be
cleaned of soot, creosote, ashes
and loose paint by a qualified chim-
ney cleaner. Creosote will ignite
if highly heated. A dirty chimney
flue may create and distribute soot
within the house. Inspect chimney
and firebox flue for damage. If
damaged, repair flue and firebox
before operating heater.
WARNING: Installation, ser-
vice and repair of this appliance
must be performed by a qualified
installer, service agency, compa-
ny or gas supplier experienced
with this type of gas appliance.
Only factory authorized compo-
nents listed in these instructions
may be used in accordance with
manufacturer’s instructions and
all codes and requirements of
the authority having jurisdiction.
Any modifications to this kit,
or use of unauthorized compo-
nents or accessory items will
void manufacturer’s warranty
and may result in a hazardous
condition.
INSTALLATION AND CLEARANCES
Figure 2 shows technical information regarding
installation of your gas log set. Please make sure
all specifications shown are applicable before
installation is attempted.
Flue Opening Specifications
Note:
This vented appliance must be installed
only in a solid-fuel burning or UL127 factory-
built fireplace with a working flue and constructed
of noncombustible material. The fireplace must
include a working flue and venting system with
minimum openings shown in Figure 3.
LOG SIZING REQUIREMENTS
Min.
Flue
Size
Minimum Firebox Size
Log
Size Height Depth
Front
Width
Rear*
Width
18" 17" 14" 24" 20" 8"
24" 17" 14" 28" 22" 8"
*Measured at 14" depth.
SPECIFICATIONS (W.C.)
FUEL INLET
PRESSURE
MANIFOLD
PRESSURE
Min. Max.
NG 7" 10.5" 3.5"
LP 11" 14" 10"
Figure 2 - Technical Information Chart
Figure 3 - Sizes and Clearances
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct, do
not install heater. Call dealer where you bought
heater for proper type heater.
WARNING: This appliance
is equipped for (natural or pro-
pane/LP) gas. Field conversion
is not permitted.
vENTING SPECIFICATIONS FOR
INSTALLATION
The fireplace chimney flue and vent must be draft-
ing properly. To check vent for proper drafting:
Light a tightly rolled newspaper on one end and
place it at the inside front edge of fireplace. Ob-
serve smoke and be sure vent is properly drawing
it up the chimney. If smoke spills out into the room,
extinguish flame and remove any obstruction until
proper venting is achieved.
The chimney flue damper must be fixed open to
provide a minimum of 43 square inches of free
air opening during operation of this log set. A
multipurpose damper clamp is provided to fix the
damper in position.