5
TO CONVERT FROM UPFLOW TO
DOWNFLOW CONFIGURATION
1. Lay the furnace on its back.
2. Remove the front door.
3. Remove the seven sheet metal screws that are
used to fasten the top cap to the casing.
4. Remove the four sheet metal screws that are
used to fasten the bottom cap to the casing.
Remove the bottom cap and save the screws.
5. Unplug the vent blower wires.
6. Disconnect the pressure hose from the vent
blower.
7. Remove the four machine screws that fasten the
vent blower to the vent pan and save the
screws. Leave the gasket in place on the vent
pan.
8. Remove the two extra machine screws in the
vent pan front and save the screws.
9. Install the cast aluminum transition on the vent
blower, using the three screws supplied on the
vent blower (See Figure 4).
FIGURE 4 – VENT BLOWER
10. Rotate the vent blower 180º so that its outlet
points toward the inlet air end of the furnace
(See Figure 3).
11. Line up the vent blower mounting holes with the
holes in the vent pan and screw it into place.
Use the same machine screws that held the vent
blower in place previously.
12. Install the two extra machine screws in the two
open holes in the front of the vent pan (See Fig-
ure 3).
13. Plug in the vent motor wires.
14. Plug the pressure hose into the vent blower.
15. Remove the round knockout at the right side of
the top cap (See Figure 5).
FIGURE 5 – TOP CAP
16. Install the top cap at the opposite end of furnace
from the vent blower, using the seven sheet
metal screws saved earlier (See Figure 3).
17. Install the bottom cap on the bottom of the
furnace using the sheet metal screws saved
earlier (See Figure 3).
18. The conversion is now complete. The furnace
may now be installed in the downflow position or
in the horizontal position on either side
FURNACE LOCATION
This furnace is design certified for installation as an
upflow, downflow furnace or horizontal furnace on
either side in an alcove, closet, basement, attic,
garage or utility room. It is certified only for use in a
home constructed on-site or a manufactured home
completed at the final site. This furnace is not design
certified to be installed outdoors, in a mobile home,
trailer or recreational vehicle.
The furnace should be located as close to the
chimney or vent as possible and as close to the
center of the warm air distribution system as
possible.
When the furnace is installed in a residential garage
it must be located and installed such that it will be
protected from damage by vehicles. The furnace
must be installed so that the burners are a minimum
of 18" above the floor.
Clearances to Combustible Materials
Proper clearances from the furnace to any combus-
tible materials must be maintained. These required
minimum clearances are shown below and on a
label in the furnace.
