Lochinvar Shield SNR150-100 - Manual (Page 23)

23
Vent/air termination – sidewall
3
Sidewall direct venting
(continued)
VENT / AIR
TERMINATION
12"
MIN.
12"
MIN.
12"
MIN.
Figure 3-2A Clearance to Gravity Air Inlets
5. Maintain clearances as shown in FIG.’s 3-1A thru 3-3B,
pages 22 and 24. 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
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.
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.
ALTERNATE VENTING ARRANGEMENT
(IF SPACE PERMITS)
BIRD
SCREEN
12”
MIN
12” MIN
15” MAX
COUPLING
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
BIRD SCREEN
Figure 3-1C Alternate PVC/CPVC Venting Arrangement
(if Space Allows) w/Field Supplied Fittings
Installation & Service Manual TM
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
BIRD SCREEN
12" MIN
12" MIN
15" MAX
MODELS SNR150-100 THRU SNA500-125
Figure 3-1D Alternate PVC/CPVC/SS Venting
Arrangement - Typical Stainless Steel Sidewall
Termination of Air and Vent w/Field Supplied Fittings,
Utilizing 90° Elbow Intake
12" (305 MM) MIN
15" (381 MM) MAX
12" (305 MM) MIN
FROM BOILER
VENT PIPE
CONNECTION
TO BOILER
INTAKE AIR
CONNECTION
BIRD SCREEN
MODELS SNA285-125 THRU SNA500-125 WITH FASNSEAL ONLY
Figure 3-1E Alternate SS Venting Arrangement -
Typical Stainless Steel Sidewall Termination of Air and
Vent w/Field Supplied Fittings, Utilizing FasNSeal’s
Hood Intake