37402-5-0620
Page 12
Reassembly and Resealing Vent-Air Intake System
When vent-air intake system is removed for servicing the furnace,
the following steps will assure proper reassembly and resealing of
the vent-air intake assembly.
1. Remove old caulking beneath the edge of the outside mount-
ing plate. Apply new caulking beneath the edge of the outside
mounting plate. Use additional caulking to correct uneven wall
surface, such as clapboard.
2. Remove old furnace sealant from flue outlet collar on combustion
chamber and collar of vent cap. Remove old furnace sealant
from both ends of 4” (102mm) diameter flue outlet tube.
3. Attach 6” (152mm) diameter air inlet tube onto the collar of air
drop assembly. Attach caulked, outside mounting plate into
the 6” (152mm) diameter air inlet tube. Position the outside
mounting plate so that 6” (152mm) diameter air inlet tube has
a slight downward slope to the outside. The downward slope
is necessary to prevent the entry of rainwater. Attach outside
mounting plate to exterior wall with (4) #10 x 1 1/2” (38mm)
screws provided.
4. Apply furnace cement or RTV silicone sealant to 4” (102mm)
diameter flue outlet collar on combustion chamber and to
4” (102mm) diameter collar on vent cap. Attach 4” (102mm)
diameter flue outlet tube onto flue outlet collar on combustion
chamber. Attach vent cap into the 4” diameter flue outlet tube.
Attach vent cap to outside mounting 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 project or on Siding (vinyl, aluminum, etc.)
Direct vent furnaces are designed to be installed on a uniform out-
side 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 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 sup-
ported 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 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 10” (254mm)
for DVC-35.
See Figure 9.
If it does, you will need to use the DV-
1190 Extended Flue Kit.
INSTALLATION INSTRUCTIONS (CONT’D)
Vinyl siding kit, DV-822, is available from Empire Comfort Sys-
tems, Inc. The depth is 3” (76mm), which enables the vent cap to
be extended away from siding or projections. The wall depth plus
the additional 3” (76mm) depth of the vinyl siding vent cap exten-
sion should not exceed a total depth of 10” (254mm) for DVC-35.
See Figure 10.
Figure 9
Figure 10
WARNING
When vinyl siding vent kit, DV-822 or 2” x 4” (51mm x 102mm)
framing is added to an existing installation (furnace is
installed) do not attempt to add sections of pipe to the flue
outlet tube or air inlet tube. An air tight seal is required for
both tubes. Refer to Parts List, page 20 to order tubes.
