Lochinvar WH 55-399 Installation & Operation Manual page 22

4
Sidewall direct venting
Vent/air termination – sidewall
Figure 4-1C Alternate Venting Arrangement (if Space
Allows) w/Field Supplied Fittings
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
ALTERNATE VENTING ARRANGEMENT
(IF SPACE PERMITS)
Figure 4-1D Alternate Venting Arrangement - Typical
Stainless Steel Sidewall Termination of Air and Vent w/
Field Supplied Fittings
TO BOILER
INTAKE AIR
CONNECTION
FROM
BOILER
VENT PIPE
CONNECTION
BIRD SCREEN
GRADE OR SNOW LINE
5. Maintain clearances as shown in FIG.'s 4-1A thru 4-3B,
pages 21 and 22. 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 (FIG. 4-1B); 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 or subject to buildup of leaves or sediment.
22
COUPLING
12" MIN
15" MAX
BIRD SCREEN
12"
MIN
BIRD
SCREEN
GRADE OR
SNOW LINE
12" MIN
15" MAX
12" MIN
Installation & Operation Manual
Figure 4-2A Clearance to Gravity Air Inlets
MIN.
Figure 4-2B Alternate Clearance to Gravity Air Inlets w/
Field Supplied Fittings
Figure 4-3A Clearance to Forced Air Inlets
VENT / AIR
TERMINATION
7' MIN. ABOVE ANY
PUBLIC WALKWAY
Figure 4-3B Alternate Clearance to Forced Air Inlets w/
Field Supplied Fittings
7' MIN ABOVE ANY
PUBLIC WALKWAY
12"
MIN.
VENT / AIR
TERMINATION
12"
MIN.
12"
12"
MIN
BIRD
SCREEN
(TYPICAL)
12"
MIN
12"
MIN
IF LESS
THAN 10'
36"
MIN.
FORCED AIR
INLET
IF LESS
THAN 10'
36"
MIN
FORCED AIR
INLET
BIRD
SCREEN
(TYPICAL)