The RF000142 Coupling can be secureddirectly to the furnace intake coupling if condensation is a concern. If the RF000142 is used on the combustion air inlet, it must be installed with the arrow pointing up. It should be noted, the combustion air will actually be moving in a direction opposite of the arrow on the RF000142 coupling. It must have a field supplied, trapped drain tube free-draining to proper condensate disposal location. A loop in the drain tube can serve as a trap. The unused RF000142 drain fitting should be capped.

Non-Direct Vent Applications:

• A minimum of one 90 degree elbow should be installed on the combustion air intake coupling to guard against inadvertent blockage.

Alternate Vent/Flue Location:

• The alternate vent/flue location is the large hole directly in line with the induced draft blower outlet. To use the alternate vent/flue location refer to the following steps and the Alternate Vent/Flue Location figure. To use an alternate vent location on a counterflow/horizontal model, a special kit is required.

NOTE: In the horizontal left installation position, a means of condensate collection must be provided to keep vent pipe condensatefrom entering the draft inducer housing. If the vent drain elbow iseliminated from the installation, an RF000142 kit must be used.