Langley/Empire DV-40E-5, DV-20E-5 Furnace Installation, Vent Terminal Figure

FURNACE INSTALLATION (continued)

Be sure to deburr the ends with a file after cutting. Installation is easy after cutting the wall opening secure the vent terminal box in place using the (4) 10 x 1" hex-head screws provided. Locate the box so that the middle exhaust tube is directed toward the furnace exhaust outlet opening. See Figure 8. Attach the black 2" flexible inlet air hose to the bottom 2" connector on the vent box using a hose clamp. Secure the other end to the lower inlet air box connector using the hose clamp. Do not kink hose. Attach the long straight end of the 2" orange silicone exhaust elbow to the middle vent terminal tube and rotate the elbow toward the furnace exhaust outlet. Secure the hose to the vent box using a hose clamp. Carefully push the furnace back closer to the wall and secure the exhaust elbow to the 2" exhaust tube exiting the unit. Secure the elbow in place using the last remaining hose clamp. The furnace can now be secured to the wall.

The furnace can be vented with up to a maximum length of 15' (4.6m) including termination vent and using 2 - 90° elbows. Also, the furnace can be vented with up to a maximum length of 10' (3m) including termination vent and using 3 - 90° elbows. For longer vent lengths order the vent kit, Part Number DVE-1 and DVE-2. See Figures 11 and 12 illustrating extended vent run and venting options.

Note: If the extended vent kit is used and the exhaust vent pipe is run through a cold space, such as an attic or a garage, the pipe should be insulated using 1/2" (13mm) thick fiberglass insulation or equivalent to keep the flue products warm enough to avoid condensation. Also, slope 1/4" (6mm) per foot (305mm) the vent terminal horizontal run downward toward the outside of the house to assure any condensate flow out of vent system. Horizontal vent pipe runs of 5 feet (1.5m) or more in length may accumulate condensation in the exhaust pipe and must, therefore, be sloped downward to drain any condensate out of the end vent terminal. Use straps or other suitable supports spaced every 5 feet (1.5m) to adequately hold pipe. Be sure to avoid any low spots or sags in pipe run. Be sure all connections are tight using the hose clamps as shown in Figure 9, "Vent Coupling Connections."

For wall depths thicker than 10" (254mm) order the extended vent terminal kit which will cover walls to 32" (813mm) thickness. The vent pipes must be cut to length to assemble for desired wall thickness.

For extended venting, it is also acceptable to use 2" (51mm) diameter

the vent system. In doing this, it is important to securely seal the vent system and slope all horizontal runs downward 1/4" (6mm) per foot (305mm) toward the vent terminal outside to drain out any condensate. It is also necessary to adequately support both the exhaust and intake and to center the exhaust pipe in the wall.

Be sure to consult local codes prior to installation to verify allowable procedures.

Installation of Shroud

To complete inside installation, secure furnace to the wall bracket by attaching the two wall mounting brackets to the wall bracket by using (2) 10 x 1/2" (13mm) hex-head screws provided (See Figures 4 and 6). To attach the right shroud and left shroud to the casing back, the 3/4" wide flange on the shroud must be positioned toward the casing side. When positioned correctly, the (6) louvers on the shroud will be facing up and the knock-out on the shroud will be facing down. Attach the right shroud and left shroud to the casing back with (3) 10x1/2" hex-head screws supplied in hardware package, for each shroud. Attach top shroud to right shroud and left shroud with (4) Phillips-head screws, supplied in hardware package. Insert air filter into top shroud.

Attention: If the right shroud and left shroud are installed incorrectly, with the 3/4" wide flanges facing inward, the top shroud will not be able to be installed onto the side shrouds. The top shroud will appear to be 2 inches, too narrow.

Vent Terminal (Figure 10)

Place the 6 3/8" x 6 3/8" (162mm x 162mm) black foam, wall plate gasket within the mounting plate. The 4 3/4" (121mm) diameter hole in the black foam gasket will allow for installation of the concentric vent tube assembly. Slide the outside mounting plate into place on the concentric vent tube assembly. The outside mounting plate should seal against the face of the building and be secured in place using (4) 10 x 1" hex-head screws. Be sure to caulk and seal around the pipe on the exterior using high temperature exterior grade, silicone caulk rated at 204°C/400°F. Wipe some silicone sealant on the 2" (51mm) exhaust pipe extension. The end cap can be pushed into place on the exhaust outlet tube.

Attention: The opening on the bottom of the end cap must be positioned toward the ground. The opening on the bottom cannot be pivoted to the right or left, it must be centered toward the ground.

PVC or ABS pipe for the combustion air intake supply piping only to the unit. If this is used, the pipe and fittings must conform to ANSI and ASTM Standards D1785 for SCH. 40 PVC, D2665 for PVC-DWV, D2241 for SDR-21 and SDR-26 PVC, D2661 for ABS-DWV and F628 for SCH. 40 ABS. Pipe cement and primer must be used and conform to ASTM Standard D2564 for PVC or D2235 for ABS. This PVC or ABS pipe must not be used for the exhaust vent pipe run.

Note: Type SDR pipe is not approved for use in Canada.

For new construction installation, the intake and exhaust vent can be run inside a wall, a vertical or horizontal distance prior to exiting the wall. This can be done but not the preferred method of

CAULK AROUND PIPE

EXHAUST FITTING-SLIDE ONTO 2" EXHAUST TUBE AND USE RTV SEALANT TO SECURE IN PLACE WITH OUTLET POINTED DOWN AS SHOWN

NO. 10 X 1 1/2"

SCREWS (4)

INLET AIR

EXHAUST	12"(305mm)MIN.
AIR
	ABOVE GRADE

installation due to the inability to perform periodic inspection of

Figure 10

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