Lennox EL297DFV Series Unit Information page 56

12" (305mm)
Minimum
Above Average
Snow
Accumulation
CLAMP
DIRECT VENT CONCENTRIC ROOFTOP TERMINATION
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
FIGURE 38
FIELD-PROVIDED
REDUCER MAY BE
REQUIRED TO ADAPT
DIFFERENT VENT PIPE
OUTSIDE
SIZE TO TERMINATION
WALL
EXHAUST
AIR
INTAKE
CLAMP
AIR
(Not Furnished)
DIRECT VENT CONCENTRIC WALL TERMINATION
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
FIGURE 39
EXHAUST
VENT
5"
(127mm)
INTAKE
AIR
18" MAX.
(457mm)
EXHAUST VENT
Inches (mm)
optional intake elbow
OPTIONAL VENT TERMINATION FOR MULTIPLE UNIT
INSTALLATION OF DIRECT VENT WALL TERMINATION KIT
(30G28 or 81J20)
FIGURE 40
Accelerator not required for
3" concentric
FLASHING
(Not Furnished)
INTAKE
SHEET METAL STRAP
(Clamp and sheet metal strap
must be field installed to support
the weight of the termination kit.)
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT DIFFERENT VENT
PIPE SIZE TO TERMINATION
Accelerator not required
for 3" concentric
INTAKE
AIR
EXHAUST
AIR
12" (305mm) Min.
INTAKE
AIR above grade or
average snow ac
cumulation.
GRADE
12"
(305mm)
5-1/2"
(140mm)
Front View
12" (305mm) Min.
above grade or
INTAKE cumulation.
AIR
Side View
2" EXTENSION FOR 2" PVC
PIPE1" EXTENSION FOR 3"
PVC PIPE
FURNACE
INTAKE
PIPE
FLUSH-MOUNT SIDE WALL TERMINATION KIT
51W11 (US) or 51W12 (Canada)
DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
Minimum 12" (305MM)
above chimney top
plate or average snow
accumulation
NOTE - Do
tical discharge through an existing unused chimney or stack is required, insert piping
inside
trated. In any exterior portion of chimney, the exhaust vent must be insulated.
Details of Exhaust Piping Terminations for Non-Direct
Vent Applications
Exhaust pipes may be routed either horizontally through
an outside wall or vertically through the roof. In attic or
closet installations, vertical termination through the roof
is preferred. See FIGURE 43 and FIGURE 44 for typical
terminations.
1 - Exhaust piping must terminate straight out or up as
shown. The termination pipe must be sized as listed
in TABLE 19.The specified pipe size ensures proper
velocity required to move the exhaust gases away
from the building.
2 - On field supplied terminations for side wall exit,
exhaus t piping may extend a maximum of 12
inches (305mm) for 2" PVC and 20 inches (508mm)
for 3" (76mm) PVC beyond the outside wall.
Page 56
FURNACE
EXHAUST
4''
PIPE
GLUE EXHAUST
END FLUSH INTO
TERMINATION
FLAT
1-1/2" ACCELERATOR
SIDE
FIGURE 41
ANGLE-CUT IN DIRECTION
3" - 8"
(76mm-
8" - 12"
203mm)
(203mm - 305mm)
SHOULDER OF FITTINGS
INTAKE PIPE
PROVIDE SUPPORT
INSULATION (optional)
OF PIPE ON TOP PLATE
SHEET
METAL TOP
PLATE
(76mm-
203mm)
INSULATE
TO FORM
SEAL
FIGURE 42
STRAIGHT-CUT OR
OF ROOF SLOPE *
ALTERNATE
INTAKE PIPE
3" - 8"
EXTERIOR
PORTION OF
CHIMNEY