Direct Vent - Vertical Concentric - Weil-McLain Series 2 Manual

® S
ERIES
DIRECT VENT —
2. Place roof penetrations to obtain minimum clearance of
12 inches between the edges of adjacent vent pipes of other
boilers for U. S. installations (see Figure 39).
3. For Canadian installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code and a ULC S636 compliant
vent kit.
4. The air inlet of a ECO 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.
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
termination outside diameter.
Mount concentric termination
1. Assemble the vent termination as described for concentric
terminations, on page 40.
2. Mount the termination as shown in Figure 40.
3. Support the concentric vent/air termination at the roof penetration
as shown in Figure 40 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
protection 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 assembly 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 44, page 40, or per kit instructions for polypropylene kits.
b. Cement the rain cap in place.
Part number 550-142-190/1218
2
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G
AS FIRED WATER BOILER
Vertical concentric
See notices on previous page.
— Boiler Manual
(continued)
Figure 39
Vertical termination — 3" PVC concentric
— single or multiple boilers
Figure 40 3" PVC concentric termination supports
37