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A.O. Smith 1700, 3400, 2600 Direct Vent Horizontal Termination, VENT/AIR Termination Locations

Models: 3400 1700 2000 2600

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DIRECT VENT: HORIZONTAL TERMINATION

Gas vent extending through an exterior wall must not terminate adjacent to a wall or below building extensions such as eaves, parapets, balconies, or decks. Failure to comply could result in severe personal injury, death, or substantial property damage.

Installation must comply with local requirements and with the National Fuel Gas Code, ANSI Z223.1 for U.S. installations or CSA B149.1 for Canadian installations.

VENT/AIR TERMINATION LOCATIONS:

Follow these guidelines for locating the vent/air terminations:

1.Make sure the total length of piping for vent or air do not exceed the limits mentioned in Table 14 and Table 15 on

Page 36.

2.Consider the surroundings when terminating the vent and air:

•While positioning the vent termination, ensure vapors will not damage nearby shrubs, plants or air conditioning equipment.

•The flue products will form a noticeable plume as they condense in cold air. Avoid areas where the plume could obstruct window views.

•Prevailing winds could cause freezing of condensate and water/ice buildup where flue products impinge on building surfaces or plants.

•Do not allow accidental contact of flue products with people or pets.

•Do not locate the terminations near building corners, near adjacent buildings or surfaces, window wells, stairwells, alcoves, courtyards, or other recessed areas, where wind eddies could affect performance or cause recirculation .

•Sidewall vent and air inlet terminations must terminate in the same pressure zone.

•Do not terminate above any door or window, where condensate can freeze, causing ice formations.

•Locate or monitor the vent to prevent condensate damage to exterior finishes.

3.The air piping must terminate in a down-turned elbow, using a mesh screen. This setup will avoid recirculation of flue products into the combustion air stream. See Figure 33.

4.The vent piping must terminate with a Tee pointed upwards and away from the air inlet. See Figure 33.

5.Maintain clearances as shown in Figure 33 and Figure 34. Vent must terminate:

•At least 6 feet (1.8 m) from adjacent walls.

•No closer than 12 inches (305 mm) below roof overhang.

•At least 7 feet (2.1 m) above any public walkway.

•At least 3 feet (0.9 m) above any forced air intake within 10 feet (3 m).

•No closer than 12 inches (305 mm) below or horizontally from any door or window or any other gravity air inlet.

Air inlet must terminate at least 12 inches (305 m) above grade or snow line; at least 12 inches (305 mm) below the vent termination; and the vent pipe must not extend more than 24 inches (610 mm) vertically outside the building as shown in Figure 33 and Figure 34.

Do not terminate closer than 4 feet (1.2 m) horizontally from any electric meter, gas meter, regulator, relief valve, or other equipment. Never terminate above or below any of these within 4 feet (1.2 m) horizontally.

6.Locate terminations so they are not likely to be damaged by foreign objects, such as stones or balls, or subject to buildup of leaves or sediment.

Figure 33.  AIR/VENT TERMINATION - HORIZONTAL

Figure 34.  HORIZONTAL CLEARANCES - AIR/VENT

TERMINATION

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A.O. Smith 1700, 3400, 2600, 2000 instruction manual Direct Vent Horizontal Termination, VENT/AIR Termination Locations
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3400, 1700, 2000, 2600 specifications

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