Instructions / Assembly

14
VENT-DRAIN
Figure 9B
NOTE: For non-direct 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
E DGES OF SHEET METAL HOLES MAY BE SHARP . U SE GLOVES AS A
PRECAUTION WHEN REMOVING HOLE PLUGS .
WARNING
On upflow units secure the combustion air intake pipe to the
air intake coupling by using a take apart rubber coupling sup-
plied with the furnace or a plastic coupling. Also, the in-
take coupling may be inverted to allow the intake pipe to be
glued directly to it. After inverting the coupling, secure it
to the furnace top with screws. On counterflow units secure
the combustion air intake pipe to the air intake coupling using
the rubber coupling and worm gear hose clamps provided with
the unit. The counterflow rubber coupling allows service removal
of air intake piping internal to the furnace blower compartment.
The combustion air intake pipe can also be secured directly to
the counterflow unit air intake pipe coupling.
Insert flange. Cut 2 ½” long.
Figure 10
RF000142
T HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORT A LOAD . W HEN THE
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET ,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD -
SUPPLIED VENT / FLUE PIPING , AS DAMAGE CAN RESULT IN LEAKS
CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES ,
INCLUDING CARBON MONOXIDE
WARNING
COMBUSTION AIR INTAKE OPTIONS: The RF000142 coupling
can be secured directly to the furnace intake coupling if con-
densation is a concern. If the RF000142 is used on the com-
bustion 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. A tee installed in the intake
pipe is also an acceptable method of catching condensation.
It must have a field supplied, trapped drain tube or pipe,
free-draining to proper condensate disposal location. A loop
in the drain tube can serve as a trap. (See Figure 9B)
NON-DIRECT VENT INSTALLATIONS
A minimum of one 90° elbow should be installed on the combus-
tion air intake “coupling” to guard against inadvertent block-
age.
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. This option is not available with counter-
flow models.
NOTE: In the horizontal left installation position, a means of
condensate collection must be provided to keep vent pipe
condensate from entering the draft inducer housing. If the
vent drain elbow is eliminated from the installation, an
RF000142 kit must be used.
1. Remove the four screws from the vent pipe flange on
top the furnace.
2. Remove the internal elbow and vent pipe.
3. Cut 2 1/2" from the flange .