Ultra Boiler Manual

Part number 550-100-440/0122
87
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ADVANCED INSTALLATION
 (continued)
Figure 98 DIRECT EXHAUST — Sidewall — conguration options and
minimum clearances
4. Consider the surroundings when terminating the vent:
a. Position the vent termination where vapors will not damage
nearby shrubs, plants or air conditioning equipment or be
objectionable.
b. e ue products will form a noticeable plume as they con-
dense 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 ue products impinge on building surfaces
or plants.
d. Avoid possibility of accidental contact of ue products with
people or pets.
e. Do not locate the terminations where wind eddies could aect
performance, such as inside building corners, near adjacent
buildings or surfaces, window wells, stairwells, alcoves, court-
yards 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
nishes.
5. Maintain clearances as shown in the illustrations in this manual
section. Also maintain the following:
a. Vent must terminate:
• At least 6 feet from adjacent walls.
• No closer than 5 feet below roof overhang.
• At lease 3 feet above any forced air intake within 10feet.
• No closer than 48 inches below or horizontally from any
door or window or any other gravity air inlet.
b. Do not terminate closer than 4 feet horizontally from any elec-
tric meter, gas meter, regulator, relief valve or other equipment.
Figure 99 DIRECT EXHAUST — Sidewall — clearances to
openings
Figure 100 DIRECT EXHAUST — Sidewall — clearances from
vent exit to forced air intake
6. Because Ultra boilers are Category IV appliances, the
National Fuel Gas Code, ANSI Z223.1, requires that
the vent must not terminate over a public walkway or
over an area where condensate or vapor could create a
nuisance or hazard, or could be detrimental to the op-
eration of regulators, relief valves, or other equipment.
7. Where the vent penetrates an outside wall, the annular
space around the penetration must be permanently
sealed using approved materials to prevent entry of
combustion products into the building.