13
Combustion Air
Exhaust
Figure 9
COMBUSTION AIR INTAKE OPTIONS: The RF000142
coupling (Figure 8) can be secured directly to the furnace
intake coupling if condensation/rain water 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 op
-
posite of the arrow on the RF000142 coupling. It must have
a field supplied, trapped drain tube free-draining to a proper
condensate disposal location. A loop in the drain tube can
serve as a trap. The unused RF000142 drain fitting must be
capped. A field supplied 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
a proper condensate disposal location. A loop in the drain
tube can serve as a trap.
Alternate Vent & Intake Pipe Connections
(Up flow/Horizontal models only)
When installing a furnace horizontally with the left side down,
alternate flue and combustion air pipe connections may be
used. This method allows the flue and combustion air piping
to be run vertically through the side of the furnace (facing up
in horizontal left). The alternate vent location is the 3” hole
directly in line with the induced draft blower outlet.
When using the horizontal alternate vent configuration, you
must use the RF000142 vent drain kit. See Figures 10 & 11
& follow steps below.
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,
the RF000142 kit must be used.
Insert flange. Cut 2 ½” long
.
RF000142
2 ½”
Figure 10
Vent/Flue Pipe Cut
Figure 11
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
B
E
SURE
NOT
TO
DAMAGE
INTERNAL
WIRING
OR
OTHER
COMPONENTS
WHEN
REINSTALLING
COUPLING
AND
SCREWS
.
CAUTION
1. Remove the four screws from the vent pipe flange on
top the furnace.
2. Remove the internal elbow, vent pipe and gasket.
3. Cut the internal vent pipe 2 1/2” from the flange.
Discard the un-flanged section.
4. Remove the 3” plastic plug (in line with the inducer
outlet) and insert it in the space vacated by removal
of the internal vent pipe.
5. Install the RF000142 drain coupling with arrow facing
up, on the draft inducer outlet.
6. Insert the 2 1/2” flanged section of pipe with gasket
through the 3” hole and connect to RF000142 drain
coupling. Secure it with gear clamp provided.
7. Use the four self-tapping screws removed in step 1 to
