INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE
14
440 01 4001 05
Specifications subject to change without notice.
Condensate Trap
−
Horizontal
Orientation
When the furnace is installed in the horizontal right position, the
condensate trap will be initially located at the bottom of the
collector box, as received from the factory. See the top image in
Figure 10
. When the furnace is installed in the horizontal left
position, the condensate trap will be initially located at the top of
the collector box, as received from the factory. See the top image
in
Figure 11
. In both cases the trap must be repositioned on the
collector box for proper condensate drainage. See bottom images
in
Figure 10
and
Figure 11
.
A field
−
supplied, accessory Horizontal Installation Kit (trap
grommet) is required for all direct
−
vent horizontal installations
(only). The kit contains a rubber casing grommet designed to seal
between the furnace casing and the condensate trap. (See
Figure 17
)
NOTICE
The field-supplied, accessory horizontal drain trap
grommet is ONLY REQUIRED FOR DIRECT VENT
APPLICATIONS. It is NOT required for applications
using single-pipe or ventilated combustion air venting.
NOTICE
The condensate trap extends below the side of the
casing in the horizontal position. A minimum of 2-in.
(51 mm) of clearance is required between the casing
side and the furnace platform for the trap to extend out
of the casing in the horizontal position. Allow at least
1/4-in. per foot (20mm per meter) of slope down and
away from the furnace in horizontal sections of drain
line.
To Relocate the Condensate Trap:
Remove the knockout in the casing for the condensate trap.
Install the grommet in the casing when required for direct
−
vent
horizontal applications.
Orient the furnace in the desired position.
Allow for 2 in. (51 mm) of clearance underneath the furnace for
the condensate trap and drain line.
Figure 10
shows the condensate trap and tubing before and
after relocation in the horizontal right position.
Figure 11
shows the condensate trap and tubing before and
after relocation in the horizontal left position.
Refer to the appropriate figure to begin the trap conversion.
Refer to Condensate Drain section for information how to install
the condensate drain.
Figure 10
Unconverted Factory Configuration as viewed in the Horizontal Right Orientation
A11573LA
Remove plug from
collector box.
DO NOT DISCARD.
If alternate vent position
is required, loosen clamp
on inlet of vent elbow.
Remove the screw that secures
the trap to the collector box and
remove trap.
Representative drawing only, some models may vary in appearance.
