User Guide

Part number 550-100-400/0717
80
®
SERIES 4 GAS-FIRED WATER BOILERBoiler Manual
DIRECT VENT: Vertical vent / sidewall air (continued)
Termination and fi ttings
1. Prepare the vent termination coupling by inserting a bird screen.
Bird screens must be purchased separately. See the parts list at the
end of this manual for part numbers.
a. If using 3-inch piping for an Ultra-230, cut a 4-inch bird screen
by placing 3-inch fi tting on screen and cutting around it as a
template.
2. Maintain the required dimensions of the fi nished termination
piping as shown in Figure 92 .
Multiple vent terminations
1. When terminating multiple Ultra boilers, terminate each vent/air
connection as described in this section.
2. Place adjacent terminations at least 6 inches apart.
3. For Canadian installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code.
Connecting from vent termination to boiler
1. Install the termination penetration as instructed in the preced-
ing. Then proceed to page 82 to complete the piping between the
termination and the boiler.
Determine location for air inlet elbow
1. 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 appliance terminations.
2. Locate the air inlet elbow (termination) using the following
guidelines.
3. The air piping must terminate in a down-turned elbow as shown
in Figure 93 .
a. Apply the confi guration on the left side of Figure 93 unless
the terminations would fail to meet minimum clearance to
grade or snow line.
b. Apply the confi guration on the right side of Figure 93 when
the terminations need to be raised higher to meet clearance to
grade or snow line.
c. The air pipe may run up the side of the building, as shown.
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.
4. You must consider the surroundings when terminating the air
connection:
a. Make sure there are no obstructions for air fl ow. DO NOT
locate the termination where plants could grow and cause
obstruction to air fl ow.
b. Do not locate the terminations where wind eddies could affect
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.
c. Locate the air inlet termination at least 12 inches below and 12
inches horizontally from any appliance or building vent outlet.
5. 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.
&IGURE Vent termination (through the roof) for direct
vent: vertical vent / sidewall air
&IGURE Sidewall air inlet (termination) for direct vent:
vertical vent / sidewall air