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13117-9-0907Page 10
Installing Vent Assembly
Attention: Do not attempt to cut vent tubes. When you order appropriate
vent kit for measured wall depth, the vent tubes will fit together.
1. Place provided caulking beneath the collar of the outside mounting
plate. Use additional caulking to correct uneven wall surface, such
as clapboard.
2. Insert six inch air tube on outside mounting plate INTO six inch air
tube attached to inlet air drop chute. Place four inch flue tube on
vent cap OVER four inch flue tube attached to combustion cham-
ber. Position the outside mounting plate so that six inch air 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 four (4) 10 x 1 1/2" screws.
3. Installation is completed.
Reassembly And Resealing Vent-Air Intake System.
When vent-air intake system is removed for service the furnace, the fol
-
lowing steps will assure proper reassembly and resealing of the vent-air
intake assembly.
1. Remove old caulking beneath the collar of the outside mounting
plate. Apply new caulking beneath the collar of the outside mount
-
ing plate. Use additional caulking to correct uneven wall surface,
such as clapboard.
2. Insert six inch air tube on outside mounting plate INTO six inch air
tube attached to inlet air drop chute. Position the outside mounting
plate so that the six inch air 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
four (4) 10 x 1 1/2" screws.
3. Place four inch flue tube on vent cap OVER four inch flue tube at-
tached to combustion chamber. Attach vent cap to outside mount-
ing plate with three (3) 10 x 1/2" screws.
4. 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 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 win
-
dow 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 pro
-
jection within 6" 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" framing whose outside
dimensions match the overall dimensions of the mounting plate is rec-
ommended. The 2" x 4" 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" framing should not exceed
a total depth of 19" for DV-25T and DV-35T (See Figure 7) (Refer to
Vent Kits page 3).
Figure 8
Vinyl siding vent kit, DV-822, is available from Empire Comfort Sys
-
tems, Inc. The depth is 3", which enables the vent cap to be extended
away from siding or projections. The wall depth plus the additional 3"
depth of the vinyl siding vent cap extension should not exceed a total
depth of 19" for DV-25T and DV-35T. (See Figure 8) (Refer to Vent Kits
page 3)
Warning: When vinyl siding vent kit, DV-822 or 2" x 4" fram-
ing 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 Vent Kits, page 3 to order tubes.
Figure 7