Weil-McLain Evergreen EVG 220 Manual page 34

®
gas
DIRECT VENT — Vertical concentric
2. Place roof penetrations to obtain minimum of 12 inches between
centers of adjacent vent pipe of another boiler for U. S. installa-
tions (see Figure 40).
3. The air inlet of a Evergreen
tion. It is not classified as a forced air intake with regard to spacing
from adjacent boiler vents.
Prepare roof penetrations
1. Roof penetration hole:
a. Cut a clearance hole to clear the termination outside diameter
as prescribed in the kit instructions.
b. Insert a galvanized metal thimble in the vent pipe hole.
2. Follow all local codes for isolation of vent pipe when passing
through floors, ceilings and roofs.
3. Provide flashing and sealing boots sized for the concentric termina-
tion outside diameter.
Mount concentric termination
1. Assemble the vent termination as described for concentric termi-
nation, page 35.
2. Mount the termination as shown in Figure 41.
3. Support the concentric vent/air termination at the roof penetration
as shown in Figure 41 or per concentric kit instructions.
• 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.
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.
When inserting the partially-assembled termination kit
through the roof penetration, wrap plastic or other pro-
tection over the end of the exposed assembly to prevent
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 as-
sembly in any way could result in severe personal injury
or death due to toxic flue product emissions.
If using AL29-4C stainless vent pipe, use the vent pipe
manufacturer's PVC adapter if connecting to a PVC
concentric vent attachment.
Do not connect any other appliance to the vent pipe or
multiple boilers to a common vent pipe.
4. After the assembly has been positioned in the roof 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 kit instructions for polypropylene kits.
b. Cement the rain cap in place.
– 34 –
-
fired water boiler
See notices on previous page.
®
boiler is part of a direct vent connec-
— 220/299/300/399 Boiler Manual
Figure 40
Figure 41
(continued)
Vertical termination — concentric
termination — single or multiple boilers
PVC concentric termination supports
Part number 550-100-131/0120