Ultra Boiler Manual

Part number 550-100-440/0122
74
  
3” or 4” concentric (cont.)
Figure 82 Installing and supporting the concentric sidewall vent
assembly
Figure 83 Concentric termination requirements
Ensure that the wall material is strong enough
to prevent the rain cap from being pushed
inward if struck or pushed from the outside.
Install terminations — concentric pipes
1. Assemble the vent termination as described for vertical concen-
tric terminations, beginning on page76.
If necessary, you can shorten the lengths of the inner
and outer pipes for a shorter nished assembly. But
you must ensure the pipes butt correctly at both ends.
Failure to properly assemble the concentric termina-
tion can result in ue gas recirculation, causing possible
severe personal injury or death.
2. Wall penetration:
a. 3” termination: Preferably, use a thimble with a 4½-inch
hole. If not using a thimble, carefully use a hole saw to cut a
hole not larger than 4¾ inches in diameter through the wall.
e nished hole must provide a solid stop for the rain cap
ribs, as shown in the inset to Figure82.
b. 4” termination: Preferably, use a thimble with a 6-inch hole.
If not using a thimble, carefully use a hole saw to cut a hole
not larger than 6¼ inches in diameter through the wall. e
nished hole must provide a solid stop for the rain cap ribs,
as shown in the inset to Figure82.
3. Secure the termination in place so the rain cap will butt against
the outside wall or outer thimble plate as shown in Figure82.
4. Before beginning vent and air piping from the boiler to the con-
centric termination, mount and secure the concentric termina-
tion as shown in Figure82 and Figure105,page92.
e vent and air piping must be securely supported, and
must not rest its weight on the boiler ttings. 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.
e supports/bracing used must support the termina-
tion assembly to prevent slippage or movement.
e 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.
When inserting the partially-assembled termination
kit through the roof penetration, wrap plastic or other
protection over the end of the exposed assembly to
prevent debris from entering the pipes. If the air pas-
sages become blocked, the boiler will not operate.
Once the rain cap has been cemented to the assembly,
there is no way to correct the problem. e assembly
would have to be replaced if it were cut to be removed
and cleaned. Altering the assembly in any way could
result in severe personal injury or death due to toxic
ue product emissions.
When using AL29-4C stainless vent pipe, use the vent
pipe manufacturer’s PVC adapter when connecting to
the concentric vent attachment.
5. Aer the assembly has been positioned in the opening and all
supports have been attached, install a bird screen (purchased
separately if not included with the kit) and rain cap as follows:
a. Place the bird screen on the end of the inner pipe as in Fig-
ure89,page78.
b. Cement the rain cap in place as shown.
Concentric termination
(installing termination — see page 76)
Install pipe supports every 5 feet
on both the horizontal and verti-
cal runs.
• Install a hanger support within
6inches of any upturn in the
piping.
• The concentric termination
assembly must be installed
before piping from the
boiler to the termination.
• Support the termination
at the wall as shown in the
termination instructions.
• Slope horizontal piping
downward toward the boiler at
least 1/4 inch per foot.
• Rotate the concentric
termination Y-tting about 30°
to result in pipe centers the
same as at the boiler.