Intake Piping
The EL296UHE furnace may be installed in either direct vent or
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 transition solvent cement or a sheet metal screw to secure the intake pipe to the inlet air connector.
2 - Route piping to outside of structure. Continue with installation following instructions given in general guidelines for piping terminations and intake and ex haust piping terminations for direct vent sections. Re fer to table 5 for pipe sizes.
TYPICAL AIR INTAKE PIPE CONNECTIONS
UPFLOW NON−DIRECT
VENT APPLICATIONS
INTAKE DEBRIS SCREEN (Provided)
NOTE - Debris screen and elbow may be rotated, so that screen may be positioned to face forward or to either side.
FIGURE 26
TYPICAL AIR INTAKE PIPE CONNECTIONS
HORIZONTAL NON−DIRECT VENT APPLICATIONS (Horizontal Right−Hand Air Discharge Application Shown)
PVC pipe
coupling
OR
INTAKE DEBRIS SCREEN (Provided)
NOTE - Debris screen may be positioned straight out (preferred) or with an elbow rotated to face down.
FIGURE 27
Follow the next two steps when installing the unit in Non‐ Direct Vent applications where combustion air is taken from indoors or ventilated attic or crawlspace and flue gases are discharged outdoors.
1 - Use
The air intake piping must not terminate too close to the flooring or a platform. Ensure that the intake air inlet will not be obstructed by loose insulation or other items that may clog the debris screen.
2 - If intake air is drawn from a ventilated attic (figure 28) or ventilated crawlspace (figure 29) the exhaust vent length must not exceed those listed in table 6. If 3” di ameter pipe is used, reduce to 2” diameter pipe at the termination point to accommodate the debris screen.
3 - Use a sheet metal screw to secure the intake pipe to the connector, if desired.
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