Lennox EL297UH090XV36C - Vent Pipe Connections and Clearances; Typical Exhaust;Intake Connections and Termination Clearances

Page 65
TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW
DIRECT OR NON-DIRECT VENT APPLICATIONS
2”
2”
2”
3”
2”
2”
or
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
EXHAUST
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Exhaust pipe and intake pipe must be the same diameter.
TRANSITION
2”
1−1/2”
045/070 Only
2”
INTAKE
3”
INTAKE
EXHAUST
Exhaust
Exhaust
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
Exhaust
6” Min
FIGURE 23
SIDE VIEW
2”
2”
2”
or
TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR
NON-DIRECT VENT APPLICATIONS
(RIGHT HAND DISCHARGE SHOWN)
3”
2”
45°
MAX
45°
MAX
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
EXHAUST
12” max.
*2”
*2”
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Exhaust pipe and intake pipe must be the same diameter.
TRANSITION
1−1/2”
2”
3”
*2”
*2”
*2”
*2”
INTAKE
2”
2”
or
2”
2”
EXHAUST
INTAKE
045/070 Only
Exhaust
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
Exhaust
Exhaust
2”
FIGURE 24