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Part number 550-100-400/0119
69
d. Avoid possibility of accidental contact of fl ue 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.
f. Do not terminate above any door or window or under a deck.
Condensate can freeze, causing ice formations.
g. Locate or guard vent to prevent condensate damage to exterior
fi nishes.
3. Maintain clearances as shown in Figure 70, page 68 , Figure 71 ,
Figure 71 and Figure 73 . Also maintain the following:
a. Vent must terminate:
At least 6 feet from adjacent walls.
No closer than 5 feet 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” above grade or snow line
c. Do not terminate closer than 4 feet horizontally (above or
below) from any electric meter, gas meter, regulator, relief
valve or other equipment.
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.
Multiple vent/air terminations
1. When terminating multiple Ultra boilers, terminate each vent/air
connection as described in this manual.
All vent pipes and air inlets must terminate at the same
height to avoid possibility of severe personal injury,
death or substantial property damage.
2. Place wall penetrations to obtain minimum clearance as shown
in Figure 73 for U. S. installations. For Canadian installations,
provide clearances required by Natural Gas and Propane Instal-
lation
CAN/CSA
B149.1 or B149.2 Installation Code.
3. The air inlet of an Ultra boiler is part of a direct vent connection.
It is not classifi ed as a forced air intake with regard to spacing
from adjacent boiler vents.
4. Combustion air (NOT vent piping) can be manifolded as shown
in Figure 59, page 59 .
®
Series 4
gas-fired water boiler — Boiler Manual
Figure 71 Termination location eil-cLain ent
air plate clearances to openins
Figure 72Termination location eil-cLain ent
air plate clearances to pulic ala or
forced air intae
Figure 73 Termination location eil-cLain ent
air plate multiple oilers clearance from
ent to air intae of the net oiler
Sidewall vent/air termination: Weil-McLain cap (cont.)
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