Lennox International Inc EL180UHE Horizontal Right Position, Venting Using a Masonry Chimney

HORIZONTAL RIGHT POSITION

Top Vent Discharge

Vent Pipe

Pressure Switch

Flue

Transition

Cover Plate

AIR

FLOW Collector Box

Make-Up Box

DGas supply piping must be brought into the unit from the bot­ tom in order to accommodate the flue pipe.

DCut combustion air inducer tubing from 9” to 8” to avoid inter­ ference with inducer motor

DRemove make-up box assembly (2 screws) and cut wire tie to free make-up box wires. Re-install make-up box on other side of cabinet.

DRe-secure make-up box wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and secure to the gas manifold.

FIGURE 20

HORIZONTAL RIGHT POSITION

Side Vent Discharge - no modifications necessary

Make-Up Box

Pressure Switch

Vent Pipe

AIR

FLOW

Flue Transition

Collector Box

FIGURE 21

The EL180UHE series units are classified as fan-assisted Category I furnaces when vertically vented according to the latest edition of National Fuel Gas Code (NFPA 54 / ANSI Z223.1) in the USA. A fan-assisted Category I fur­

nace is an appliance equipped with an integral mechanical means to either draw or force combustion products through the combustion chamber and/or heat exchanger. The EL180UHE is not approved for use with horizontal venting. NOTE - Use these instructions as a guide. They do not su­ persede local codes. This furnace must be vented accord­ ing to all local codes these installation instructions, and the provided venting tables in these instructions

The venting tables in this manual were extracted from the National Fuel Gas Code (NFPA 54 / ANSI Z223.1) and are provided as a guide for proper vent installation. Proper ap­ plication, termination, construction and location of vents must conform to local codes having jurisdiction. In the ab­ sence of local codes, the NFGC serves as the defining doc­ ument.

Use self-drilling sheet metal screws or a mechanical fas­ tener to firmly secure the vent pipe to the round collar of the flue transition. If self-drilling screws are used to attach the vent pipe, it is recommended that three be used. Drive one self-drilling screw through the front and one through each side of the vent pipe and collar. See figure 22.

Install the first vent connector elbow at a minimum of six inches (152 mm) from the furnace vent outlet. See figure 22.

Venting Using a Masonry Chimney

The following additional requirements apply when a lined masonry chimney is used to vent this furnace.

Masonry chimneys used to vent Category I central fur­ naces must be either tile‐lined or lined with a listed metal lining system or dedicated gas vent. Unlined masonry chimneys are prohibited. See figures 23 and 24 for com­ mon venting.

A chimney with one or more sides exposed to the outside of the structure is considered to be an exterior chimney.

An exterior masonry chimney that is not tile-lined must be lined with B1 vent or a listed insulated flexible metal vent. An exterior tile-lined chimney that is sealed and capped may be lined with a listed uninsulated flexible metal vent. If the existing chimney will not accommodate a listed metal liner, either the chimney must be rebuilt to accommodate one of these liners or an alternate approved venting meth­ od must be found.

Insulation for the flexible vent pipe must be an encapsu­ lated fiberglass sleeve recommended by the flexible vent pipe manufacturer. See figure 23.

Refer to the tables and the venting information contained in these instructions to properly size and install the venting system.

IMPORTANT

Once the venting system is installed, attach the “Dis­ connected Vent” warning sticker to a visible area of the plenum near the vent pipe. See figure 22. The warning sticker is provided in the bag assembly. Or­ der kit 66W04 for additional stickers.

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