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Field Supplied Drain; Upflow Model Installed Vertically; Drain Exiting Right Side; Drain Exiting Left Side - 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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Acceptable
area for
drain hole.
12"
3"

Field Supplied Drain

Drain the furnace and air conditioning coil if applicable,
in compliance with code requirements. In horizontal or
counterflow installations, a field installed rubber coupling
will allow the drain trap to be removed for cleaning. The
drain trap must be primed before initial furnace start up.
When an air conditioning coil drain is connected to the field
supplied furnace drain, it must be vented. An open tee
must be installed at a height no higher than the bottom of
the furnace collector box to prevent air conditioning con-
densate from backing up into the furnace, if the common
drain was blocked.

Upflow Model Installed Vertically

The trap and factory installed hoses remain as shipped.
The furnace drain may exit either the right or left side of
the furnace cabinet. Both sides of the cabinet have two
.875" diameter holes which can be used interchangeably
for drain and low voltage wiring purposes. If a higher drain
exit is needed, a .875" diameter hole may be added in the
area shown in Figure 21. Any unused cabinet opening must
be sealed. Do not allow drain hose to sag or trap water.

Drain Exiting Right Side

1. Locate and Install the 45º pipe / hose drain coupling
from the outside of the cabinet (barbed end goes
in the cabinet) through hole in the right side of the
cabinet and secure with two field supplied #8 self-
tapping screws (see Figure 22).
2. Locate the long drain hose #3 and cut at line "A" .
3. Install large end of hose #3 to trap outlet and secure
with 1.25" clamp.
Side Cut-Out
Right side shown.
Figure 21
45 degree
barb-pipe
adapter
Installer selects right or left side drain
and installs this hose accordingly.
4. Install smaller end of hose #3 on 45º elbow and secure
with 1" clamp.
5. Refer to Field Supplied Drain section for instructions
on field supplied / installed drain on outlet of furnace
trap.

Drain Exiting Left Side

1. Install the 45 degree pipe / hose drain coupling
from the outside of the cabinet (barbed end goes in
the cabinet) through the hole in the left side of the
cabinet and secure with two field supplied #8 self-
tapping screws (see Figure 22).
2. Locate the long drain hose #3 and cut at "B" line for
a 17.5" cabinet; cut at line "C" for a 21" cabinet;
do not cut for a "D" width cabinet.
3. Install large end of hose #3 to trap outlet and secure
with 1.25" clamp.
4. Install smaller end of hose #3 on 45º elbow and secure
with 1" clamp.
5. Refer to Field Supplied Drain section for instructions
on field supplied / installed drain on outlet of furnace
trap.
21
Hose #1
Hose #2
Figure 22
45 degree
barb-pipe
adapter

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