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Vent Pipe Installation—Standard Furnace Connections
It is the responsibility of the installer to ensure that the piping
connections to the furnace are secure, airtight, and adequately
supported.
Attachment "couplings" for vent/flue and combustion air intake
pipe connections are provided on the furnace's top cover
(upflow) or base pan (counterflow). To use the standard
connections, field supplied vent/flue pipe and combustion air
intake pipe (when applicable) should be secured directly to the
furnace at these locations.
Vent/Flue Pipe
Vent/flue pipe can be secured to the vent/flue coupling using the
rubber coupling and worm gear hose clamps provided with this
furnace. See "Standard Connections" illustration. The rubber
coupling allows separation of the vent/flue pipe from the furnace
during servicing.
NOTE: Do not use other commercially available "no hub
connectors" due to possible material conflicts.
The vent/flue pipe can also be secured using a PVC or ABS
elbow or coupling using the appropriate glue.
NOTE: For nondirect vent installations, a minimum of one 90°
elbow should be installed on the combustion air intake coupling
to guard against inadvertent blockage.
Combustion Air Pipe—Direct Vent Installations
On upflow furnaces, secure the combustion air intake pipe
directly to the air intake coupling. On counterflow furnaces,
secure the combustion air intake pipe to the air intake coupling
using the rubber coupling and worm gear hose clamps provided
with this furnace. The counterflow rubber coupling allows service
removal of air intake piping inside the furnace blower
compartment.
NOTE: Do not use other commercially available "no hub
connectors" due to possible material conflicts.
The combustion air intake pipe can also be secured directly to
the counterflow unit air intake pipe coupling.
Combustion Air Pipe—Nondirect Vent Installations
A minimum of one 90° elbow should be installed on the
combustion air intake coupling to avoid inadvertent blockage.
Standard Connection—Upflow
B
A
A. 90º PVC elbow (nondirect vent only)
B. Combustion air pipe (direct vent
only)
D
C
C. Rubber coupling with worm
gear hose clamps
D. Vent/flue pipe
Standard Connection—Counterflow
B
A
A. 90º PVC elbow (nondirect vent only)
B. Combustion air pipe (direct vent
only)
WARNING
Goodman 56
Edges of sheet metal holes may be sharp. Use gloves as
a precaution when removing hole plugs.
Vent Pipe Installation—Alternate Furnace Connections
Alternate side panel locations are available for both combustion
air inlet and vent/flue pipe connections. These connections may
be used for any of the following situations:
Upright counterflow installations requiring additional access
to a filter or electronic air cleaner.
Horizontal installations of the downflow/horizontal model
desiring vent/flue (and combustion air intake) piping run
vertically from the side of the cabinet.
NOTE: Standard and alternate locations can be combined (for
example, an installation may use the standard combustion air
intake location, but use the alternate vent/flue location or vice
versa), if needed.
Alternate Vent/Flue Location—Upflow
The alternate vent/flue location is the large hole directly in line
with the induced draft blower outlet.
1. Remove and save the 4 screws securing the vent/flue
coupling to the furnace top panel.
2. Loosen the worm gear hose clamps on the rubber elbow and
detach the rubber elbow from both the induced draft blower
and the vent/flue pipe.
D
C
C. Rubber couplings with worm
gear hose clamps
D. Vent/flue pipe
17
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