Lochinvar 51-211 operation manual 2AClearance to Gravity Air Inlets

Installation & Operation Manual

4 Sidewall direct venting (continued)

Vent/air termination – sidewall

Figure 4-1CAlternate Venting Arrangement (if Space Allows) w/Field Supplied Fittings

TO BOILER

INTAKE AIRCOUPLING

CONNECTION

12” MIN

15” MAX

FROM BOILER

VENT PIPE

CONNECTION

BIRD SCREEN

12”

MIN

BIRD

SCREEN

GRADE OR

SNOW LINE

ALTERNATE VENTING ARRANGEMENT

(IF SPACE PERMITS)

Figure 4-1DAlternate Venting Arrangement - Typical Stainless Steel Sidewall Termination of Air and Vent w/ Field Supplied Fittings

TO BOILER
INTAKE AIR	12" MIN
CONNECTION
	15" MAX
FROM
BOILER
VENT PIPE
CONNECTION

12" MIN

BIRD SCREEN

GRADE OR SNOW LINE

5. Maintain clearances as shown in FIG.’s 4-1A thru 4-3B,
pages 22 - 23. Also maintain the following:
a.	Vent must terminate:
	• At least 6 feet from adjacent walls.
	• No closer than 12 inches below roof overhang.
	• At least 7 feet above any public walkway.
	• At least 3 feet above any forced air intake within
	10 feet.
	• No closer than 12 inches below or horizontally
	from any door or window or any other gravity air
	inlet.
b.	Air inlet must terminate at least 12 inches above

Figure 4-2AClearance to Gravity Air Inlets

12"

MIN.

VENT / AIR

TERMINATION 12"

MIN.

12"

MIN.

Figure 4-2BAlternate Clearance to Gravity Air Inlets w/ Field Supplied Fittings

12”

MIN

BIRD

SCREEN

(TYPICAL)

12”

MIN

12”

MIN

Figure 4-3AClearance to Forced Air Inlets

IF LESS

THAN 10’

VENT / AIR	36"
TERMINATION
	MIN.

FORCED AIR

INLET

7' MIN. ABOVE ANY PUBLIC WALKWAY

Figure 4-3BAlternate Clearance to Forced Air Inlets w/ Field Supplied Fittings

grade or snow line; at least 12 inches below the vent

termination; and the vent pipe must not extend

more than 24 inches vertically outside the building

as shown in FIG. 4-1B. Condensate could freeze and

block vent pipe.

c. Do not terminate closer than 4 feet horizontally

from any electric meter, gas meter, regulator, relief

valve, or other equipment. Never terminate above or

below any of these within 4 feet 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.

7’ MIN ABOVE ANY PUBLIC WALKWAY

IF LESS

THAN 10’

36”

MIN

FORCED AIR

INLET

BIRD

SCREEN

(TYPICAL)

23