Lennox ELITE EL297UH070XV36B Installation Instructions Manual page 30

NOTE − FIELD−PROVIDED
REDUCER MAY BE
REQUIRED TO ADAPT
LARGER VENT PIPE SIZE
TO TERMINATION
D
B
C1
A
STRAIGHT
APPPLICATION
* WALL
SUPPORT
D
E
B
A
C1
EXTENDED
APPLICATION
ALTERNATE TERMINATIONS (TEE & FORTY−FIVE DEGREE ELBOWS ONLY)
B D
1
C
Intake
2
Elbow
A
D
1
E
B
12"
C
2
A
1
The exhaust termination tee should be connected to the 2" or 3" PVC flue pipe as shown in the illustration. In
horizontal tee applications there must be be a minimum of 3 ft away from covered patios or any living ares and
cannot be within 3 ft of a window. 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 recommended. 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.
FIELD FABRICATED WALL TERMINATION
D
B
Intake
C2
Elbow
A
D
E
B
A
C2
A - Clearance above
B
Grade or average snow
Exhaust
accumulation
D
B - Horizontal separation
between intake and exhaust
C
3
C - Minimum from end of
exhaust to inlet of intake
A D - Exhaust pipe length
E - Wall support distance from
D
top of each pipe
(intake/exhaust)
1
E
B
B
12"
C
2
A
Figure 41
Page 30
2" (51mm)
Vent Pipe
A− Minimum clearance
above grade or average
12" (305 mm)
snow accumulation
B− Maximum horizontal
separation between 6" (152 mm)
intake and exhaust
C1 -Minimum from end of
8" (203 mm)
exhaust to inlet of intake
C2 -Minimum from end of
6" (152 mm)
exhaust to inlet of intake
D− Maximum exhaust
12" (305 mm)
pipe length
E− Maximum wall support
distance from top of each
6" (152 mm)
pipe (intake/exhaust)
See maximum allowable venting tables for venting
lengths with this arrangement.
* Use wall support every 24" (610 mm). Use two
wall supports if extension is greater than
24" (610 mm) but less than 48" (1219 mm).
NOTE − One wall support must be within 6" (152 mm)
from top of each pipe (intake and exhaust) to prevent
movement in any direction.
2" (51mm)
Vent Pipe
12" (305 mm) Min 12" (305 mm) Min
6" (152mm)min
24" (610mm )Max
9" (227mm)
12" (305mm)min
16" (405mm )Max
6" (152mm) Max
D
E
Front View of
Intake and Exhaust
C
Intake
A
3" (76mm)
Vent Pipe
12" (305 mm)
6" (152 mm)
8" (203 mm)
6" (152 mm)
20" (508 mm)
6" (152 mm)
3" (76mm)
Vent Pipe
6" (152mm)min
24" (610mm )Max
9" (227mm)
12" (305mm)min
16" (405mm )Max
6" (152mm) Max
Exhaust