GMES96-U Installation Manual

26
cause premature heat exchanger failure. A new home may
require more frequent replacement until all construction dust
and dirt is removed. Circulating air filters are to be installed
in the return air duct external to the furnace cabinet. Con-
sider 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 fil-
tration to protect equipment and the air distribution 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 instal-
lation 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 shown
in Table 8. Consult your distributor for information on our
complete line of IAQ Clean Comfort™ products.
Air Cleaner
Installation Location
Maximum
Heating
Airflow
Filter (Media)
Dimensions
Part Number
Air
Cleaner
Family
Si de or bottom return 1200 CFM 16 i n X 20 i n x 5¼" AM11-1620-5
Si de or bottom return 1600 CFM 16 i n X 25 i n x 5¼" AM11-1625-5
Si de or bottom return 1600 CFM 20 i n X 20 i n x 5¼" AM11-2020-5
Si de or bottom return 2000 CFM 20 i n X 25 i n x 5¼" AM11-2025-5
Side return
(for 2 separate returns)
Si de return (Ri ght a ngl e) 2000 CFM 20 i n X 25 i n x 5¼" AM11-2025-5RA AM11-5RA
Bottom return (pl a tform) 2000 CFM 20 i n X 25 i n x 5¼" AM11-2832-5PP
Bottom return (pl a tform) 2000 CFM 20 i n X 25 i n x 5¼" AM11-2843-5PP
AM11-5
2 X 1600 CFM 2, 16 in X 25 i n x 5¼" AM11-3225-5 AM11-3225
AM11-5PP
Table 8
AM11-5 AM11-5RA AM11-5PP
Family Family Family
Upright Installations
Depending on the installation and/or customer preference, dif-
fering filter arrangements can be applied. Filters can be in-
stalled in the central return register or a side panel external filter
rack kit (upflows). As an alternative a media air filter or elec-
tronic air cleaner can be used as the requested filter.
The following figure shows possible filter locations.
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
element. 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 sup-
ports. 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.
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 under-
sized opening will cause reduced airflow.
Refer to the Filter Sizing Chart to determine filter area re-
quirements.
Filter Sizing Chart
Model Minimum Recommended Filter Size^
*MES960403BU
1 - 16 X 25 Side or Bottom
*MES960603BU
1 - 16 X 25 Side or Bottom
*MES960805CU
1 - 20 X 25 Bottom/2 - 16 X 25 Side Return
^ Larger filters may be used, filters may also be centrally located.
Table 7
Change filters before occupants
take ownership of a new home!
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 accumilation and
replaced if necessary. Failure to maintain clean filters can