Install Instructions (Venting)
Part number 550-100-103/1110
A–23
GAS-FIRED WATER BOILER — Manual addendum — Venting
DIRECT EXHAUST — Sidewall (continued)
DIRECT EXHAUST — Sidewall — configuration options Figure 26
and minimum clearances
Consider the surroundings when terminating the vent:4.
Position the vent termination where vapors will not damage a.
nearby shrubs, plants or air conditioning equipment or be
objectionable.
The flue products will form a noticeable plume as they con-b.
dense in cold air. Avoid areas where the plume could obstruct
window views.
Prevailing winds could cause freezing of condensate and water/c.
ice buildup where flue products impinge on building surfaces
or plants.
Avoid possibility of accidental contact of flue products with d.
people or pets.
Do not locate the terminations where wind eddies could affect e.
performance, such as inside building corners, near adjacent
buildings or surfaces, window wells, stairwells, alcoves, court-
yards or other recessed areas.
Do not terminate above any door or window or under a deck. f.
Condensate can freeze, causing ice formations.
Locate or guard vent to prevent condensate damage to exterior g.
finishes.
Maintain clearances as shown in the illustrations in this manual 5.
section. Also maintain the following:
Vent must terminate:a.
At least 6 feet from adjacent walls.s
No closer than 5 feet below roof overhang.s
At lease 3 feet above any forced air intake within 10 feet.s
No closer than 48 inches below or horizontally from any s
door or window or any other gravity air inlet.
Do not terminate closer than 4 feet horizontally from any b.
electric meter, gas meter, regulator, relief valve or other equip-
ment.
DIRECT EXHAUST — Sidewall — Figure 27
clearances to openings
DIRECT EXHAUST — Sidewall — Figure 28
clearances from vent exit to forced air intake
Because 6. 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 nui-
sance or hazard, or could be detrimental to the operation
of regulators, relief valves, or other equipment.
Where the vent pen7. etrates 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.