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3
Concentric termination location
Vent termination support
1. Do not alter any component of the concentric vent/
air termination assembly. Assemble and install all
components as supplied.
2. Support the concentric vent/air termination at the
roof penetration as shown in Figure 2.
•
The supports/bracing used must support the
termination assembly to prevent vertical slippage
or sideways movement.
•
The clamps used on the outside of the termination
pipe must not cut into the pipe or contain sharp
edges that could cause a crack to form.
Figure 2
Part number 550-141-965/0703
-
GAS
FIRED WATER BOILER
Termination supports
— Vent Supplement
Multiple vent/air terminations
1. When terminating multiple Ultra boilers, install the
concentric vent/air termination assemblies as
described in this supplement.
All vent outlets must terminate at the same
height to avoid possibility of severe
personal injury, death or substantial
property damage.
2. Place roof penetrations to obtain minimum of 12
inches between centers of adjacent vent pipe of another
boiler for U. S. installations (see Figure 3). For
Canadian installations, provide clearances required
by CSA B149.1 or B149.2 Installation Code.
3. The air inlet of an Ultra boiler is part of a direct vent
connection. It is not classified as a forced air intake
with regard to spacing from adjacent boiler vents.
Figure 3
Multiple terminations
(continued)
7
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