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Combustion Air Pipe Direct Vent Installation - Maytag Amana MES9 Series Installation Instructions Manual

Single-stage gas furnace, type fsp category iv direct or non direct vent air furnace
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This joint can be rotated on the fitting to establish
maximum clearance between refrigerant lines, metering
devices, and condensate drain lines, etc. This joint is the
equivalent of one 90 deg. elbow when considering elbow
count.
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.
E
DGES OF SHEET METAL HOLES MAY BE SHARP
PRECAUTION WHEN REMOVING HOLE PLUGS
Combustion Air Pipe
Direct Vent Installations
On upflow units secure the combustion air intake pipe to
the air intake coupling by using a take apart rubber coupling
supplied with the furnace or a plastic coupling. Also, the
intake 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 cou-
pling 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.
Combustion Air
Tee Installation in Intake Pipe
WARNING
. U
SE GLOVES AS A
.
Exhaust
Figure 8B
COMBUSTION AIR INTAKE OPTIONS: The RF000142 coupling
(Figure 8B) can be secured directly 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 combus-
tion 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 con-
densate 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.
Insert flange. Cut 2 ½" long.
R 000142
F
Non-Direct Vent Installations
A minimum of one 90° elbow should be installed on the combus-
tion air intake "coupling" to guard against inadvertent blockage.
T
HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORT A LOAD
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD
/
SUPPLIED VENT
FLUE PIPING
CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES
INCLUDING CARBON MONOXIDE
15
VENT-DRAIN
Figure 8C
Figure 9
WARNING
. W
,
AS DAMAGE CAN RESULT IN LEAKS
HEN THE
,
-
,

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