Weil-McLain Evergreen EVG 220 Manual page 30

®
gas
DIRECT VENT — Sidewall concentric
Install termination — concentric pipes
1. Assemble the vent termination as described for concentric ter-
minations, on page 35.
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 assemble the concentric termination can
result in flue gas recirculation, causing possible severe
personal injury or death.
2. Wall penetration:
a. Preferably, use a thimble with a 5½-inch hole (4" Concentric
Kit) or a 4½-inch hole (3" Concentric Kit). If not using a
thimble, carefully use a hole saw to cut a hole not larger than
5¾ or 4¾ inches in diameter through the wall. The finished
hole must provide a solid stop for the rain cap ribs, as shown
in the inset to Figure 36.
Ensure that the wall material is strong enough to pre-
vent the rain cap from being pushed inward if struck
or pushed from the outside.
3. Secure the termination in place so the rain cap will butt against
the outside wall or outer thimble plate as shown in Figure 36.
4. Before beginning vent and air piping from the boiler to the con-
centric termination, mount and secure the concentric termination
as shown in Figure 36.
The vent and air piping must be securely supported, and
must not rest its weight on the boiler fittings. 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.
The supports/bracing used must support the termina-
tion assembly to prevent slippage or movement. See
instructions provided with concentric kit for details.
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.
When inserting the partially-assembled termination
kit through the wall penetration, wrap plastic or other
protection over the end of the exposed assembly to pre-
vent debris from entering the pipes. If the air passages
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. The 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 flue product emis-
sions.
If using AL29-4C stainless vent pipe, use the vent pipe
manufacturer's PVC adapter if connecting to a PVC
concentric vent attachment.
5. After 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
Figure 42, page 35, or per concentric kit instructions for
polypropylene kits.
b. Cement the rain cap in place as shown.
– 30 –
-
fired water boiler
See notices on previous page.
— 220/299/300/399 Boiler Manual
Figure 35
Figure 36
1
Vent pipe.
2
Air pipe.
3
Wall.
4
Outer thimble plate.
5
Supports every 5 feet or
per vent pipe mfr's in-
structions.
(continued)
Termination location — concentric
termination — multiple boilers —
clearance from vent of one to air intake of
the next
Installing and supporting the concentric
sidewall vent assembly
LEGEND
6
Wall brace, by installer,
(or see vent pipe mfr's
instructions).
7
Thimble, by installer.
8
Rain cap.
9
Rain cap ribs must butt
against outer thimble
plate or wall opening.
Part number 550-100-131/0120