Empire Comfort Systems DV-210-7SG - Manual (Page 9)

Page 9 12433-5-0606
3" (76mm) diameter flue outlet tube. Attach vent cap to outside
wall plate with (3) #10 x 1/2" (13mm) screws provided.
5. Reassembly and resealing vent-air intake system is
completed.
Installing a Vent Near a Window Ledge, Other Type of Projection
or on Vinyl Siding
Direct vent furnaces are designed to be installed on a uniform
outside wall. When the wind comes from any angle (up, down or
from either side), it must hit the vent cap equally over both the air
inlet and the flue outlet portions of the vent. Any wall projection,
such as a door or window casing, which disturbs the wind on one
side of the air inlet section will result in back pressure on the flue
section smothering the flame and eventual pilot outage.
When the vent cap is to be installed on vinyl siding or it appears that
a projection within 6" (152mm) of any side of the air inlet section
could shield the air inlet section, the entire vent should be supported
away from the wall at least the distance of the projection. 2" x 4"
(51mm x 102mm) framing whose outside dimensions match the
overall dimensions of the mounting plate is recommended. The 2"
x 4" (51mm x 102mm) framing protects vinyl siding from possible
warpage or discoloration. All joints can then be sealed and painted.
The wall depth plus the additional depth of the 2" x 4" (51mm x
102mm) framing should not exceed a total depth of 13" (330mm)
for DV-210/DV-215. (See Figure 5)