Lochinvar WH 55-399 Sidewall direct venting, Vent/air termination sidewall, Determine location

4 Sidewall direct venting

Vent/air termination – sidewall

Installation & Operation Manual

Figure 4-1APVC/CPVC/Polypropylene Sidewall Termination of Air and Vent

￿WARNING

￿WARNING

Follow instructions below when determining vent location to avoid possibility of severe personal injury, death, or substantial property damage.

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.

	TO BOILER
	INTAKE AIR
	CONNECTION
FROM BOILER
VENT PIPE
CONNECTION	12"
POSSIBLE ORIENTATIONS
	MIN
	TO
	OVER-
	HANG
	VENT / AIR
	TERMINATION

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 16 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.

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

f.Do not terminate above any door or window. Condensate can freeze, causing ice formations.

g.Locate or guard vent to prevent condensate damage to exterior finishes.

		12"
		MIN
		GRADE OR
		SNOW LINE
Table 4A Sidewall Vent Kit
Model	Kit Number	Vent Size
55 - 110	KIT30044	2 inch vent
110 - 285	KIT30045	3 inch vent
399	KIT30046	4 inch vent

If using the alternate sidewall termination:

3.The air piping must terminate in a down-turned elbow as shown in FIG. 4-1B. This arrangement avoids recirculation of flue products into the combustion air stream.

4.The vent piping must terminate in an elbow pointed outward or away from the air inlet, as shown in FIG. 4-1B.

￿WARNING Do not exceed the maximum lengths of the outside vent piping shown in FIG. 4-1B.

Excessive length exposed to the outside could cause freezing of condensate in the vent pipe, resulting in potential boiler shutdown.

Figure 4-1BAlternate PVC/CPVC/ Polypropylene Sidewall Termination of Air and Vent w/Field Supplied Fittings

TO BOILER

INTAKE AIR BIRD SCREEN

CONNECTION

FROM BOILER	12” MIN
VENT PIPE
	15” MAX
CONNECTION

TERMINATION

PLATE

12”

MIN BIRD SCREEN

GRADE OR

SNOW LINE

22