18-CE18D1-1B-EN
87
Upflow Furnace in Horizontal Right Position — Left Side Vented Combustion Air
Changes need to be made to the inducer orientation when installing
the upflow furnace in the horizontal right position with the combustion
air vented through the bottom. Additional changes are needed for
hose routing, condensate trap location, and inducer port caps, and the
condensate plug.
The figure to the right shows the furnace as it is sent from the factory.
Use the following steps to modify the furnace for horizontal right with
bottom venting of combustion air.
Before proceeding, lay unit on its back to make the conversion easier.
1.
Remove all drain hoses from condensate trap.
Note:
When removing condensate hoses from the condensate trap,
hold the trap with your hand to prevent the trap from breaking.
Removing the trap before the hoses is also an option.
2.
Remove tubing from PS2 pressure switch.
3.
Remove drain tubing from bottom of inducer housing.
4.
Remove rain gutter tubing from inducer outlet.
5.
Remove tubing from condensate pressure switch.
6.
Remove the screws that hold the condensate trap bracket. The
condensate trap should not be removed from the condensate trap
bracket. Remove assembly and retain for later installation.
7.
Remove the condensate adapter located inside the condensate
trap connection on the cold header and retain for later
installation.
Note:
The plastic condensate adapter with O-rings located inside the
cold header that is held in place by the condensate trap
bracket. Do not lose this adapter. The condensate adapter
needs to be in place when the condensate trap bracket is
reattached.
3
4
2
5
1.
Remove 3” plug on right side of unit. To be used for condensate
trap.
2.
Install condensate trap grommet.
3.
Remove 3” plugs on the left side of the cabinet. To be used for
combustion air inlet.
4.
Reuse the two 3” plugs to seal the two 3” default openings on the
top of the furnace.
