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).

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

Figure 8

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