Weil-McLain SlimFit Manual page 38

SlimFit
™
commercial condensing gas
DIRECT EXHAUST — Sidewall
2. 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 manu-
facturer instructions.
d. Insert a corrosion-resistant metal thimble in the vent pipe hole as
shown in Figure 33.
e. Follow all local codes for isolation of vent pipe when passing through
floors or walls.
3. Figure 33 — 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.
4. Insert the last length of vent pipe from the outside. The shoulder of the
vent pipe female end must rest against the outer stop plate as shown.
The plate must prevent the vent from being pushed inward.
5. Insert the termination elbow into the vent pipe end.
6. Install a vent manufacturer's bird screen in the open end of the vent
termination elbow.
7. Seal exterior openings thoroughly with exterior caulk.
8. For multiple boiler terminations, see Figure 32.
38
-
fired water boiler
(continued)
Figure 32
Figure 33
1 Vent piping — insert from
the outside until the female
end shoulder rests against
the outside stop plate
2 Vent termination elbow —
use down-turned 90-degree
elbow
— Boiler Manual
Multiple boiler direct exhaust sidewall
terminations (see Figure 31, page 37 for
required clearances)
Sidewall termination assembly — direct
exhaust installations
3 Vent manufactuerr's sidewall
stop plates (hole must be
just larger than the vent
diameter)
4 Corrosion-resistant thimble,
by installer
5 Vent manufacturer's bird
screen, by installer
Part number 550-100-116/0713