Circulating Air And Filters; Ductwork - Air Flow; Filters - Read This Section Before Installing The Return Air Ductwork; Upright Installations - Amana M8 Installation Instructions Manual

C A F
IRCULATING IR AND ILTERS
D - A F
UCTWORK IR LOW
N
EVER ALLOW THE PRODUCTS OF COMBUSTION
,
MONOXIDE TO ENTER THE RETURN DUCT WORK OR CIRCULATION AIR
.
SUPPLY
Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Ductwork
should be designed in accordance with the recommended meth-
ods of "Air Conditioning Contractors of America" Manual D.
A duct system must be installed in accordance with Standards of
the National Board of Fire Underwriters for the Installation of Air
Conditioning, Warm Air Heating and Ventilating Systems. Pam-
phlets No. 90A and 90B.
A closed return duct system must be used, with the return duct
connected to the furnace. NOTE: Ductwork must never be attached
to the back of the furnace. For installations requiring more than
1800 CFM, use a bottom return or two sided return. Supply and
return connections to the furnace may be made with flexible joints
to reduce noise transmission. To prevent the blower from inter-
fering with combustion air or draft when a central return is used,
a connecting duct must be installed between the unit and the util-
ity room wall. Furnace is shipped with the top flanges in the flat
position. Before installing a coil or ducts, the flanges must be
bent 90°. A room, closet, or alcove must not be used as a return air
chamber.
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 condensation in the heating ele-
ment. With a parallel flow arrangement, 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 recom-
mended 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 airstream. The access panel must be made
to prevent air leaks when the furnace is in operation.
NOTE: In a horizontal installation the air conditioning coil must
be adequately supported by proper brackets and supports.
Inadequate coil support can result in furnace cabinet distortion
and air leakage.
When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F.
WARNING
,
INCLUDING CARBON
When a furnace is installed so that supply ducts carry air circu-
lated by the furnace to areas outside the space containing the
furnace, the return air shall also be handled by a duct sealed to
the furnace casing and terminating outside the space containing
the furnace.
F - R T S
ILTERS EAD HIS ECTION
D
UCTWORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided by the installer. Filters must comply with UL900
or CAN/ULCS111 standards. Damage or repairs due to failure to
install filters in the furnace are not covered under the warranty.
NOTE: An undersized opening will cause reduced airflow.
U I
PRIGHT NSTALLATIONS
Depending on the installation and/or customer preference, differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register or a side panel external filter rack kit
(upflows), or the ductwork above a downflow furnace. As an alter-
native, a media air filter or electronic air cleaner can be used as
the primary filter.
C A F
IRCULATION IR ILTERS
One of the most common causes of a problem in a forced air
heating system is a blocked or dirty filter. Circulating air filters
must be inspected monthly for dirt accumulation and replaced if
necessary. Failure to maintain clean filters can cause premature
heat exchanger failure.
A new home may require more frequent replacement until all con-
struction dust and dirt is removed. Circulating air filters are to be
installed in the return air duct external to the furnace cabinet.
Upflow / Horizontal
Models
*0403A* 1 - 16 X 25 Side or 1 - 14 X 24 Bottom Return
*0603A* 1 - 16 X 25 Side or 1 - 14 X 24 Bottom Return
*0604B*
*0803B*
*0804B*
*0805C*
*0805D* 2 - 16 X 25 Side or 1 - 20 X 25 Bottom Return
*1005C* 2 - 16 X 25 Side or 1 - 20 X 25 Bottom Return
*1205D* 2 - 16 X 25 Side or 1 - 24 X 24 Bottom Return
*1405D* 2 - 16 X 25 Side or 1 - 24 X 24 Bottom Return
Downflow Models
*0403A*
*0603A*
*0804B*
*1005C*
^ Other s ize fil ters of equa l or grea ter di mens i ons ma y be us ed, fi lters may
a l s o be central ly located
¹ = us e 2 - 16 X 25 fil ters a nd two s ide returns or 20 X 25 fi lter on bottom
return i f furna ce i s connected to a cooli ng unit over 4 tons nomi na l ca pa city
20
B I T R
EFORE NSTALLING HE
Minimum Recommended Filter Size^
1 - 16 X 25 Side or Bottom Return
1 - 16 X 25 Side or Bottom Return
1 - 16 X 25 Side or Bottom Return
1 - 16 X 25 Side or Bottom Return¹
Minimum Recommended Filter Size^
2 - 10 X 20 or 1 - 14 X 25 Top Return
2 - 10 X 20 or 1 - 14 X 25 Top Return
2 - 14 X 20 or 1 - 16 X 25 Top Return
2 - 14 X 20 or 1 - 20 X 25 Top Return
A
ETURN IR