Condensate Piping - Lennox EL296DF045XV36B Unit Information

3. If exhaust piping must be run up a side wall to position
above snow accumulation or other obstructions, pip­
ing must be supported every 24 inches (610mm).
When exhaust piping must be run up an outside wall,
any reduction in exhaust pipe size must be done after
the final elbow.
4. Distance between exhaust pipe terminations on mul­
tiple furnaces must meet local codes.
12" (305mm)
ABOVE AVE.
SNOW
1/2" (13mm) FOAM
ACCUMULATION
3" (76mm) OR
2" (51mm) PVC
PROVIDE SUPPORT
FOR EXHAUST LINES
NON-DIRECT VENT ROOF TERMINATION KIT
(15F75 or 44J41)
FIGURE 42
EL296DFV NON-DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
SIZE TERMINATION
PIPE PER TABLE 24.
3" - 8"
(76mm-
203mm)
Minimum 12" (305MM)
above chimney top
plate or average snow
accumulation
SHEET
METAL TOP
PLATE
INSULATE
TO FORM
SEAL
NOTE - Do not discharge exhaust gases directly into any chimney or vent stack. If ver­
tical discharge through an existing unused chimney or stack is required, insert piping
inside chimney until the pipe open end is above top of chimney and terminate as illus­
trated. In any exterior portion of chimney, the exhaust vent must be insulated.
FIGURE 43

Condensate Piping

This unit is designed for either right‐ or left‐side exit of con­
densate piping. Refer to figures 44 and 46 for condensate
trap locations.
SIZE TERMINATION
PIPE PER TABLE
24.
INSULATION
UNCONDITIONED
ATTIC SPACE
STRAIGHT-CUT OR
ANGLE-CUT IN DIRECTION
OF ROOF SLOPE
EXHAUST VENT
1/2" (13mm)
WEATHERPROOF
INSULATION
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
3" - 8"
(76mm-
203mm)
EXTERIOR
PORTION OF
CHIMNEY
CONDENSATE TRAP AND PLUG LOCATIONS
Trap
(same on
right side)
1-1/2 in.
1 - Determine which side condensate piping will exit the
unit, location of trap, field-provided fittings and length of
PVC pipe required to reach available drain.
2 - For furnaces with a 1/2" drain connection use a 3/8 al­
len wrench and remove plug (figure 44) from the cold
end header box at the appropriate location on the side
of the unit. Install field-provided 1/2 NPT male fitting
into cold end header box. For furnaces with a 3/4"
drain connection use a large flat head screw driver or a
1/2" drive socket extension and remove plug. Install
provided 3/4 NPT street elbow fitting into cold end
header box. Use Teflon tape or appropriate pipe dope.
3 - Install the cap over the clean out opening at the base
of the trap. Secure with clamp. See figure 49 (3/4"
drain connection) or 50 (1/2" drain connection).
4 - Install drain trap using appropriate PVC fittings, glue
all joints. Glue the provided drain trap as shown in fig­
ure 49 or 50. Route the condensate line to an open
drain.
5 - Figure 47 shows the furnace and evaporator coil using
a separate drain. If necessary, the condensate line
from the furnace and evaporator coil can drain togeth­
er. See figure 48. The field provided vent must be a
minimum 1" to a maximum 2" length above the con­
densate drain outlet connection.
NOTE - If necessary the condensate trap may be installed
up to 5 feet away from the furnace. Piping from furnace
must slope down a minimum of 1/4" per ft. toward trap.
Page 51
Plug
(same on left
side)
FIGURE 44