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FIGURE 21
TYPICAL
EXHAUST
PIPE CONNECTIONS
TRANSITION
2”
2”
2”
3”
Pipe size determined in table 14.
2”
2”
or
DO NOT transition from smaller
to larger pipe size in horizontal
runs of exhaust pipe.
TOP VIEW
EXHAUST
INTAKE
* 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”
FIGURE 22
TYPICAL
INTAKE
PIPE CONNECTIONS
2”
2”
TRANSITION
2”
3”
TRANSITION
3”
Pipe size determined in table 14.
2”
2”
or
TOP VIEW
EXHAUST
INTAKE
* When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible.
NOTE − Intake pipe and exhaust pipe must be the same diameter.
*2”
*2”
*2”
Intake Piping
The ML193DF furnace may be installed in either
direct
vent
or
non-direct vent
applications. In non-direct vent
applications, when intake air will be drawn into the furnace
from the surrounding space, the indoor air quality must be
considered. Guidelines listed in Combustion, Dilution and
Ventilation Air section must be followed.
Follow the next two steps when installing the unit in
Direct
Vent applications,
where combustion air is taken from
outdoors and flue gases are discharged outdoors.
The
provided air intake screen must not be used in direct
vent applications (outdoors).
1 - Use cement to secure the intake pipe to the inlet air
connector.
