Install Instructions (Venting)

Part number 550-100-103/1110
GAS-FIRED WATER BOILER — Manual addendum — Venting
A–16
DIRECT VENT: Vertical vent / sidewall air (continued)
Termination and fittings
Prepare the vent termination coupling by inserting a bird screen. 1.
Bird screens must be purchased separately. See the parts list at the
end of this manual for part numbers.
If using 3-inch piping for an Ultra-230, cut a 4-inch bird screen a.
by placing 3-inch fitting on screen and cutting around it as a
template.
Maintain the required dimensions of the finished termination 2.
piping as shown in Figure 20.
Multiple vent terminations
When terminating multiple Ultra boilers, terminate each vent/air 1.
connection as described in this section.
Place adjacent terminations at least 6 inches apart. 2.
For Canadian installations, provide clearances required by CSA 3.
B149.1 or B149.2 Installation Code.
Connecting from vent termination to boiler
Install the termination penetration as instructed in the preced-1.
ing. Then proceed to page 18 to complete the piping between the
termination and the boiler.
Determine location for air inlet elbow
The air inlet of an Ultra boiler is part of a direct vent connection. 1.
It is not classified as a forced air intake with regard to spacing from
adjacent appliance terminations.
Locate the air inlet elbow (termination) using the following 2.
guidelines.
The air piping must terminate in a down-turned elbow as shown 3.
in Figure 21.
Apply the configuration on the left side of a. Figure 21 unless
the terminations would fail to meet minimum clearance to
grade or snow line.
Apply the configuration on the right side of b. Figure 21 when
the terminations need to be raised higher to meet clearance to
grade or snow line.
The air pipe may run up the side of the building, as shown. c.
The vent and air pipes must be secured with braces, and all
clearances and lengths must be maintained. Space braces no
further than 24 inches apart.
You must consider the surroundings when terminating the air 4.
connection:
Make sure there are no obstructions for air flow. DO NOT a.
locate the termination where plants could grow and cause
obstruction to air flow.
Do not locate the terminations where wind eddies could affect b.
performance or cause recirculation with exhaust from other
appliances, such as inside building corners, near adjacent build-
ings or surfaces, window wells, stairwells, alcoves, courtyards
or other recessed areas.
Locate the air inlet termination at least 12 inches below and c.
12 inches horizontally from any appliance or building vent
outlet.
Locate terminations so they are not likely to be damaged by foreign 5.
objects, such as stones or balls, or subject to buildup of leaves or
sediment.
Vent termination (through the roof) for direct Figure 20
vent: vertical vent / sidewall air
Sidewall air inlet (termination) for direct vent: Figure 21
vertical vent / sidewall air