Lennox EL195UHE Unit Information page 33

outside wall, the exhaust piping must be terminated
with pipe sized per table 14.The intake piping may be
equipped with a 90° elbow turndown. Using turndown
will add 5 feet (1.5m) to the equivalent length of the
pipe.
B
C
A
2
E
B
C
2
A
NOTE − See unit installation instructions for proper exhaust pipe termination size reduction.
1
The exhaust termination tee should be connected to the 2" or 3" PVC flue pipe as shown in the illustration. Do
not use an accelerator in applications that include an exhaust termination tee. The accelerator is not required.
2
As required. Flue gas may be acidic and may adversely affect some building materials. If a side wall vent
termination is used and flue gases will impinge on the building materials, a corrosion−resistant shield (24 inches
square) should be used to protect the wall surface. If optional tee is used, the protective shield is recommende-
d. The shield should be constructed using wood, sheet metal or other suitable material. All seams, joints,
cracks, etc. in affected area, should be sealed using an appropriate sealant.
3
Exhaust pipe 45° elbow can be rotated to the side away from the combustion air inlet to direct exhaust away
from adjacent property. The exhaust must never be directed toward the combustion air inlet.
D
1
D
1
A− Clearance above
grade or average snow
separation between
intake and exhaust
12"
D−Exhaust pipe length
E−Wall support distance
from top of each pipe
FIGURE 32
Page 33
8. A multiple furnace installation may use a group of up to
four terminations assembled together horizontally, as
shown in figure 38.
Intake
TABLE
15
2" (51mm)
Vent Pipe
12" (305MM) Min.
accumulation
B−Horizontal
6" (152MM) Min.
24" (610 MM) Max
C−Minimum from
end of exhaust to
9" (227MM) Min.
inlet of intake
12" (305MM) Min.
16" (405 MM) Max.
6" (152MM) Max.
(intake/exhaust)
B
D
C
3
Front View of
A
Intake and Exhaust
Exhaust
Intake
Exhaust
3" (76mm)
Vent Pipe
12" (305MM) Min.
6" (152MM) Min.
24" (610 MM) Max
9" (227MM) Min.
12" (305MM) Min.
20" (508MM) Max.
6" (152MM) Max.