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R-3122
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 mount-
ing 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 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 projec-
tion, 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 projec-
tion. 2" x 4" (51mm x 102mm) framing whose outside dimensions
match the overall dimensions of the mounting plate is recom-
mended. 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 10" (254mm) for DVC-35. (See Figure 6) If it does you
will need to use the DV-1190 Extended Flue Kit.
Vinyl siding vent kit, DV-822, is available from Empire Comfort
Systems, Inc. The depth is 3" (76mm), which enables the vent cap
to be extended away from vinyl siding or projections. The wall
depth plus the additional 3" (76mm) depth of the vinyl siding vent
cap extension should not exceed a total depth of 10" (254mm) for
DVC-35. (See Figure 6a)
Warning: When vinyl siding vent kit, DV-822 or 2" x 4"
(51mm x 102mm) framing is added to an existing installa-
tion (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 15
to order tubes.
Figure 6
Figure 6a
Mark the 6" (152mm) diameter air inlet tube 1/2" (13mm)
beyond the outside wall. Remove 6" (152mm) diameter air inlet
tube from collar of air drop assembly.
2. Attach 4" (102mm) diameter flue outlet tube onto flue outlet
collar on combustion chamber. Be sure 4" (102mm) diameter
flue outlet tube is placed as far as possible onto the collar of flue
outlet. Mark the 4" (102mm) diameter flue outlet tube 2 1/4"
(57mm) beyond the outside wall. Remove 4" (102mm) diam-
eter flue outlet tube from collar of flue outlet on combustion
chamber.
3. Mark or wrap tape completely around the tubes at the marked
points to help in making a true cut. Do not crimp or enlarge
tubes.
Installing Vent Assembly (See Figure 5)
1. Place provided caulking beneath the edge of the outside mount-
ing plate. Use additional caulking to correct uneven wall
surface, such as clapboard.
2. 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 mount-
ing 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.
3. 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" (102mm) diameter flue
outlet tube. Attach vent cap to outside mounting plate with (3)
#10 x 1/2" (13mm) screws provided.
4. Installation is completed.
Figure 5
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 mounting
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 combus-
tion chamber and collar of vent cap. Remove old furnace
sealant from both ends of 4" (102mm) diameter flue outlet tube.
