Weil-McLain SVF 1500 Manual page 42

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
DIRECT VENT — Sidewall
3. Vent pipe penetration:
a. Cut a hole for the vent pipe.
b. For combustible construction, size the vent pipe hole at least
3/8" larger than the vent pipe diameter, or larger if specified
by the vent manufacturer.
c. For noncombustible construction, size the opening per vent
manufacturer instructions.
d. Insert a corrosion-resistant metal thimble in the vent pipe
hole as shown in Figure 31.
e. Follow all local codes for isolation of vent pipe when passing
through floors or walls.
4. Figure 37 — Provide and install corrosion-resistant metal stop
plates (item 3) as shown.
a. The hole size in the stop plates must be just larger than the
vent pipe diameter.
b. Obtain stop plates ONLY from the vent pipe manufacturer.
5. Insert the last lengths of vent and air pipe from the outside. The
shoulders of the vent and air pipe female ends must rest against
the outer stop plates as shown. The plates must prevent the vent
or air pipe from being pushed inward.
6. The vent and air pipes may run up as high as 4 feet with no en-
closure. The vent and air pipes must be secured with braces, and
all clearances and lengths must be maintained. Space braces no
further than 24 inches apart.
7. External venting greater than 4 feet requires an insulated enclo-
sure around the vent and air pipes. The vent and air terminations
must exit through the enclosure as shown in the illustration
above, maintaining all required clearances.
8. Attach the exterior piping and termination elbows.
9. Install a vent/air pipe manufacturer's bird screen in the open
end of the vent termination elbow and air termination elbow.
10. Seal exterior openings thoroughly with exterior caulk.
11. For multiple boiler terminations, see Figure 36.
42
(continued)
Figure 36 Multiple terminations — clearance from vent
of one to air intake of the next (normal and
snorkel layouts).
Figure 37 DIRECT VENT — sidewall termination
assembly.
1. Vent piping — insert from the
outside until the female end
shoulder rests against the
outside stop plate.
2. Air piping — insert from the
outside until the female end
shoulder rests against the
outside stop plate
.
3. Sidewall termination plates (hole
must be just larger than the pipe
diameter).
4. Vent termination elbow — use
outward-facing 90-degree elbow
as shown.
5. Air termination elbow — use
down-turned 90-degree elbow as
shown.
6. Corrosion-resistant thimble, by
installer.
7. Bird screens, by installer.
8. Vent length.
9. Elbow.
Part number 550-100-250/0819