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Filters - Read This Section Before Installing The Return Air Duct Work - 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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When the furnace is used in connection with a cooling unit, the
furnace should be installed in parallel with or on the upstream
side of the cooling unit to avoid condensa tion in the heating
element. With a parallel flow arrange ment, the dampers or
other means used to control the flow of air must be adequate to
prevent chilled air from entering the furnace and, if manually
operated, must be equipped with means to prevent operation of
either unit unless the damper is in the full heat or cool position.
When the furnace is installed without a cooling coil, it is rec-
ommended that a removable access panel be provided in the
outlet air duct. This opening shall be accessible when the
furnace is installed and shall be of such a size that the heat
exchanger can be viewed for visual light inspection or such
that a sampling probe can be inserted into the air stream.
The access panel must be made to prevent air leaks when the
furnace is in operation.
When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F.
Filters - Read This Section Before Installing The
Return Air Duct work
Filters must be used with this furnace. Discuss filter mainte-
nance with the building owner. Filters do not ship with this
furnace, but must be provided, sized and installed externally by
the installer. Filters must comply with UL900 or CAN/ULCS111
standards. Damage or repairs due to the installation of the
furnace without filters is not covered under the warranty.
On upflow units, guide dimples locate the side return cutout
locations. Use a straight edge to scribe lines connecting the
dimples. Cut out the opening on these lines. NOTE: An un-
dersized opening will cause reduced airflow.
Refer to the Filter Sizing Chart to determine filter area
requirements.
Filter Sizing Chart
Model
Minimum Recommended Filter Size^
*MES9*0403AN*
1 - 16 X 25 Side or 1 - 14 x 25 Bottom
*MES9*0603BN*
1 - 16 X 25 Side or Bottom
*MES9*0803BN*
1 - 16 X 25 Side or Bottom
*MES9*0804CN*
1 - 16 X 25 Side or Bottom
*MES9*0805CN*
1 - 20 X 25 Bottom / 2 - 16 X 25 Side Return
*MES9*1004CN*
1 - 16 X 25 Side or Bottom
*MES9*1005CN*
1 - 20 X 25 Bottom / 2 - 16 X 25 Side Return
*MES9*1205DN*
1 - 20 X 25 Bottom / 2 - 16 X 25 Side Return
*CES9*0603BN*
2 - 10 X 20 or 1 - 16 X 25 Top Return
*CES9*0804CN*
2 - 10 X 20 or 1 - 16 X 25 Top Return
*CES9*1005CN*
2 - 14 X 20 or 1 - 20 X 25 Top Return
*CES961205DN*
2 - 14 X 20 or 1 - 20 X 25 Top Return
^ Larger filters may be used, filters may also be centrally located.
Change filters before occupants
take ownership of a new home!
Consider installing an air cleaner with deep-pleated media
filter at the time of furnace installation. A deep-pleated
filter with a MERV rating of 8 (minimum) will often provide
better filtration to protect equipment and the air distribu-
tion system than a standard 1" filter and often has lower
static pressure loss than a 1" filter. Also a deep-pleated filter
will typically require less frequent replacement intervals.
Avoid using highly restrictive 1" filters which produce static
pressure loss greater than .25" W.C. In some installations
the minimum filter size required (consult filter sizing chart
above) will not lend itself to a filter installation on the side
of the furnace. The installation of a centrally installed air
cleaner cabinet or a return duct filter installation may offer
more practicality.
Clean Comfort™ brand MERV 11 air cleaners have 5¼" media
filters and are available in the following configurations.
Consult your distributor for information on our complete
line of IAQ Clean Comfort™ products.
Depending on the installation and/or customer preference,
differing filter arrangements can be applied. Filters can be
installed in the central return register or a side panel external
filter rack kit (upflows). As an alternative a media air filter or
electronic air cleaner can be used as the requested filter.
The following figures show possible filter locations.
SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)
Possible Upright Upflow
33
AIR FLOW

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