4 Sidewall direct venting
Vent/air termination – sidewall
WARNING Follow instructions below when determining vent location to avoid
possibility of severe personal injury, death, or substantial property damage.
WARNING A gas vent extending through an exterior wall shall 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 & Operation Manual
Sidewall vent and air inlet terminations must terminate in the same pressure zone.
f.Do not terminate above any door or above or below any window. Condensate can freeze, causing ice formations.
g.Locate or guard vent to prevent condensate damage to exterior finishes.
Figure 4-1 Sidewall Termination of Air and Vent
NOTICE PVC/CPVC or ABS is acceptable air inlet pipe material.
WARNING
CAUTION
Do not connect any other appliance to the vent pipe or multiple boilers to a common vent pipe except as noted in Section 2 on page 18. Failure to comply could result in severe personal injury, death, or substantial property damage.
Sidewall venting commercial products will result in large exhaust plumes in cold climates. Consideration should be taken when locating in proximity to windows, doors, walkways, etc.
FROM BOILER VENT
PIPE CONNECTION
TO BOILER INTAKE
AIR CONNECTION
36" MIN |
48" MAX |
NOTICE | Installation must comply with local | |
requirements and with the National Fuel | ||
| ||
| Gas Code, NFPA 54 / ANSI Z223.1 for U.S. | |
| installations or CSA B149.1 for Canadian | |
| installations. |
Determine location
Locate the vent/air terminations using the following guidelines:
1.The total length of piping for vent or air must not exceed the limits given in the General Venting Section on page 17 of this manual.
2.You must consider the surroundings when terminating the vent and air:
a.Position the vent termination where vapors will not damage nearby shrubs, plants or air conditioning equipment or be objectionable.
b.The flue products will form a noticeable plume as they condense in cold air. Avoid areas where the plume could obstruct window views.
c.Prevailing winds could cause freezing of condensate and water/ice buildup where flue products impinge on building surfaces or plants.
d.Avoid possibility of accidental contact of flue products with people or pets.
e.Do not locate the terminations where wind eddies could affect performance or cause recirculation, such as inside building corners, near adjacent buildings or surfaces, window wells, stairwells, alcoves, courtyards, or other recessed areas.
12" MIN
GRADE OR
SNOW LINE
3.Maintain clearances as shown in FIG.’s
a.Vent must terminate:
•At least 6 feet (1.8 m) from adjacent walls.
•Not less than 7 feet (2.1 m) above grade where located adjacent to public walkways.
•No closer than 12 inches (305 mm) below roof overhang.
•At least 3 feet (.9 m) above any forced air intake within 10 feet (3 m).
•No closer than 4 feet (1.2 m) horizontally from any door or window or any other gravity air inlet.
b.Air inlet must terminate at least 12 inches (305 m) above grade or snow line; at least 36 inches (914 mm) below the vent termination.
c.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.
4.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. | 21 |
|
