Design Dynamics PFS VF-18P-MHD - Manual (Page 9)

www.fmiproducts.com 116986-01H 9
WARNING: This appliance is
equipped for either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rat-
ing plate. Field conversion is not
permitted.
INSTALLATION AND CLEARANCES
FOR VENT-FREE OPERATION
WARNING: Maintain the
minimum clearances. If you
can, provide greater clearances
from floor, ceiling and adjoining
wall.
MINIMUM FIREPLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42",
Floor 5", Front 36"
INsTallaTIoN
Continued
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured fireplace or listed
vent-free firebox enclosure.
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
protrudes 3
1 /
2
" from the wall. This com-
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.
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
LOG SIZING REQUIREMENTS
Minimum Firebox Size
Log
Size Height Depth
Front
Width
Rear*
Width
18" 20" 14" 35" 22 1 /
2
"
24" 20" 14" 35" 22 1 /
2
"
*Measured at 14" depth
Minimum Noncombustible Material
Clearances
If Not Using Mantel
Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the infor-
mation below.
You must have noncombustible material(s)
above fireplace opening. Noncombustible ma-
terials (such as slate, marble, tile, etc.) must
be at least 1/2" 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" models
only). See Figure 5, page 10, for minimum
clearances.
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material be-
hind it. Noncombustible material must extend
at least 8" up (for all models). If noncom-
bustible material is less than 12", you must
install the fireplace hood accessory. Even if
noncombustible material is more than 12", you
may need the hood accessory to deflect heat
away from your mantel shelf. See Figures 5, 6
and 7, page 10, for minimum clearances.
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42".