Install Instructions (Venting)

Part number 550-100-103/1110
GAS-FIRED WATER BOILER — Manual addendum — Venting
A–12
Vertical vent/air termination: 3” or 4” concentric (cont.)
Maintain clearances to termination as given below:4.
Vent outlet must be located:a.
At least 6 feet from adjacent walls.s
No closer than 5 feet below roof overhang.s
At least 7 feet above any public walkway.s
At lease 3 feet above any forced air intake within 10 feet.s
No closer than 12 inches below or horizontally from any door s
or window or any other gravity air inlet.
Air inlet must terminate at least 12 inches above the roof or b.
snow line as shown in Figure 12, page A-11. (For Canada, the
minimum is 18 inches.)
Do not terminate closer than 4 feet horizontally from any c.
electric meter, gas meter, regulator, relief valve or other equip-
ment. Never terminate above or below any of these within
4 feet horizontally.
Locate termination so it is not likely to be damaged by foreign 5.
objects, such as stones or balls, or subject to buildup of leaves or
sediment.
Do not connect any other appliance to the vent pipe or multiple 6.
boilers to a common vent pipe.
Multiple vent/air terminations
When terminating multiple Ultra boilers, install the concentric 1.
vent/air termination assemblies as described in this addendum.
All vent outlets must terminate at the same height to avoid
possibility of severe personal injury, death or substantial
property damage.
Place roof penetrations to obtain minimum of 12 inches between 2.
centers of adjacent vent pipe of another boiler for U. S. installations
(see Figure 13, page A-11).
For Canadian installations, provide clearances required by CSA 3.
B149.1 or B149.2 Installation Code.
The air inlet of an Ultra boiler is part of a direct vent connection. 4.
It is not classified as a forced air intake with regard to spacing from
adjacent boiler vents.
Prepare roof penetrations
Roof penetration hole:1.
3” termination: Cut a 5-inch diameter hole to clear the 4½-inch a.
termination outside diameter.
4” termination: Cut a 6.5-inch diameter hole to clear the 6-inch b.
termination outside diameter.
Insert a galvanized metal thimble in the vent pipe hole.c.
Follow all local codes for isolation of vent pipe when passing 2.
through floors, ceilings and roofs.
Provide flashing and sealing boots sized for the concentric termi-3.
nation outside diameter.
Mount the termination as shown in 4. Figure 15, page A-13.
Assembling the concentric termination
See 1. Figure 18, page A-14 for the dimensions and details of the
termination assembly.
Prepare the bird screen (purchased separately if not included with 2.
the kit). Cut the bird screen to size if required. If the bird screen
must be trimmed, cut the bird screen to fit the outside diameter of
the PVC inner pipe supplied with the termination kit.
Partially assemble the vent termination kit in the se-3.
quence shown in Figure 17, page A-14.
DO NOT install the rain cap and bird screen
until the assembly has been inserted through
the roof and all supports have been installed.
Follow instructions to cover the end of the
assembly with plastic before inserting through
the roof penetration to prevent debris from
blocking the air passages.
Use the following procedures to prepare termination 4.
components and cement together.
Deburr inside and outside of pipe ends.5.
Chamfer outside of each pipe end to ensure even cement 6.
distribution when joining.
Clean all pipe ends and fittings.7.
Dry thoroughly.8.
Dry assemble entire vent or air piping to ensure proper 9.
fit before assembling any joint.
For each joint:10.
Handle fittings and pipes carefully to prevent con-a.
tamination of surfaces.
Apply primer liberally to both joint surfaces — pipe b.
end and fitting socket.
While primer is still damp, lightly apply approved c.
cement to both surfaces in a uniform coating.
Apply a second coat to both surfaces. Avoid using d.
too much cement on sockets to prevent cement
buildup inside.
With cement still wet, insert pipe into fitting, twist-e.
ing ¼ turn. Make sure pipe is fully inserted.
If necessary, you can shorten the lengths of the
inner and outer pipes for a shorter finished
assembly. But you must ensure the pipes butt
correctly at both ends. Failure to properly as-
semble the concentric termination can result
in flue gas recirculation, causing possible
severe personal injury or death.
Mount concentric termination
Before beginning vent and air piping from boiler, mount 1.
and secure the concentric termination as shown in Fig-
ure 14, page A-13, and Figure 15, page A-13.
The vent and air piping must be securely
supported, and must not rest its weight on
the boiler fittings. DO NOT drill or screw
into either the vent pipe or air pipe. Failure
to properly support the vent and air piping
could result in vent piping damage, resulting
in possible severe personal injury, death or
substantial property damage.