Allied A93UH1E - Exhaust and Intake Termination Methods

508107-01Issue 2041Page 30 of 58
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.
** When transitioning down in pipe size, use at least 1 foot of 2" PVC pipe.
NOTE: Exhaust pipe and intake pipe must be the same diameter.
2”
2”
2”
2”
or
2”
EXHAUST
Pipe size determined in Table 11
or Table 12
TRANSITION
3”
*2”
**2”
1-1/2”
or
TRANSITION
EXHAUST
EXHAUST
NOTE: 1-1/2” Vent
Pipe Diameter Allowed
Only on 030/045/070
Units
6”
MINIMUM
.
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.
EXHAUST
Figure 23.
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.
** When transitioning down in pipe size, use at least 1 foot of 2" PVC pipe.
NOTE: Exhaust pipe and intake pipe must be the same diameter.
Figure 24.