Allied A97UH2E - Page 35

508433-01 Issue 2345 Page 35 of 70
Figure 19.
TYPICAL EXHAUST PIPE CONNECTIONS IN UPFLOW DIRECT OR
NON-DIRECT VENT APPLICATIONS
* 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.
2”
2”
2”
2”
or
or
TRANSITION
3”
*2”
2”
EXHAUST
Pipe size determined in Table 13A
through Table 13C
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
030/045/070 Only
TRANSITION
1-1/2”
2”
6”
MINIMUM
Figure 20.
TYPICAL EXHAUST PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON-DIRECT VENT
APPLICATIONS (RIGHT-HAND DISCHARGE SHOWN)
SIDE VIEW
45°
MAX
45°
MAX
2”
2”
2”
2”
or
2”
12” max.
EXHAUST
TRANSITION
3”
*2”
*2”
EXHAUST
TRANSITION
1-1/2”
2”
2”
EXHAUST
or
NOTE: 1-1/2” Vent
Pipe Diameter
Allowed Only on
030 / 045 / 070 Units
.
DO NOT transition
from larger to smaller
pipe in horizontal runs
of exhaust pipe.
EXHAUST
DO NOT transition
from smaller to larger
pipe in horizontal runs
of exhaust pipe.
* 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.