Design Dynamics VF-18P-MHD Gas Heater User Manual


 
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116986-01H 9
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INSTALLATION AND CLEARANCES
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WARNING: Maintain the
   
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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 replace or listed
vent-free rebox enclosure.
Minimum Clearances For Side
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A. Clearances from the side of the replace
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 replace cabinet (see Figure 4).
Note: When installing your gas logs into
a manufactured rebox, follow rebox
manufacturer’s instructions for minimum
clearances to combustible materials.
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
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  
Front
Width
Rear*
Width
18" 20" 14" 35" 22
1
/
2
"
24" 20" 14" 35" 22
1
/
2
"
*Measured at 14" depth
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Clearances
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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 replace 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 replace hood accessory (24" models
only). See Figure 5, page 10, for minimum
clearances.
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You must have noncombustible material(s)
above the replace 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 replace hood accessory. Even if
noncombustible material is more than 12", you
may need the hood accessory to deect heat
away from your mantel shelf. See Figures 5, 6
and 7, page 10, for minimum clearances.
B. Clearances from the top of the replace
opening to the ceiling should not be less
than 42".