Amana GMSS9 Series Service Instructions Manual page 21

INSTALLATION CONSIDERATIONS
ensure that all piping and connections possess adequate
structural integrity and support to prevent flue pipe separa-
tion, shifting, or sagging during furnace operation.
Dual Certification: Non-Direct/Direct Vent (90%
Furnaces Only)
The 90% furnace is dual certified and may be installed as a
non-direct vent (single pipe) or direct vent (dual pipe) appli-
ance. A non-direct vent installation requires only a vent/
flue pipe. A direct vent installation requires both a vent/
flue pipe and a combustion air intake pipe. Refer to the ap-
propriate section for details concerning piping size, length,
number of elbows, furnace connections, and terminations.
T
O AVOID BODILY INJURY, FIRE OR EXPLOSION, SOLVENT CEMENTS MUST BE
KEPT AWAY FROM ALL IGNITION SOURCES (I.E., SPARKS, OPEN FLAMES, AND
EXCESSIVE HEAT) AS THEY ARE COMBUSTIBLE LIQUIDS.
CEMENT VAPORS OR CONTACT WITH SKIN AND/OR EYES.
Precautions should be taken to prevent condensate from
freezing inside the vent/flue pipe and/or at the vent/flue pipe
termination. It is our recommendation that all vent/flue piping
exposed to temperatures below 35°F for extended periods
of time should be insulated with 1/2" thick closed cell foam.
Also all vent/flue piping exposed outdoors in excess of the
terminations shown in this manual (or in unheated areas)
should be insulated with 1/2" thick closed cell foam. Inspect
piping for leaks prior to installing insulation.
The following bullets and diagram describe the restrictions
concerning the appropriate location of vent/flue pipe and com-
bustion air intake pipe (when applicable) terminations. Re-
fer to the installation instructions for specific details on ter-
mination construction.
• All terminations must be located at least 12 inches
above ground level or the anticipated snow level.
• Vent terminations must terminate at least 3 feet above
any forced air inlet located within 10 feet.
NOTE: This provision does not apply to the combus-
tion air intake termination of a direct vent application.
• The vent termination of a non-direct vent application
must terminate at least 4 feet below, 4 feet horizon-
tally from, or 1 foot above any door, window, or gravity
air inlet into any building.
• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
which flue gases may enter a building (door, window,
or gravity air inlet).
• The vent termination of vent pipe run vertically through
a roof must terminate at least 12 inches above the
roof line (or the anticipated snow level) and be at least
12 inches from any vertical wall (including any antici-
pated snow build up).
• A vent termination shall not terminate over public walk-
ways or over an area where condensate or vapor could
WARNING
A
VOID BREATHING
create a nuisance or hazard or could be detrimental
to the operation of regulators, relief valves, or other
equipment.
• The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.
NOTE: In Canada, the B149 Fuel Gas Code takes prece-
dence over the preceding termination restrictions.
Direct Vent Installations
On upflow units secure the combustion air intake pipe di-
rectly to the air intake coupling. On counterflow units se-
cure the combustion air intake pipe to the air intake cou-
pling using the rubber coupling and worm gear hose clamps
provided with the unit. The counterflow rubber coupling al-
lows service removal of air intake piping internal to the fur-
nace blower compartment. The combustion air intake pipe
can also be secured directly to the counterflow unit air in-
take pipe coupling.
Non-Direct Vent Installations
A minimum of one 90° elbow must be installed on the com-
bustion air intake "coupling" to guard against inadvertent
blockage.
T
HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORAT A LOAD.
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD-SUPPLIED
VENT/FLUE PIPING, AS DAMAGE CAN RESULT IN LEAKS CAUSING BODILY
INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES, INCLUDING CARBON
MONOXIDE.
B
E SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS WHEN
REINSTALLING COUPLING AND SCREWS.
Vent/Flue Pipe Lengths and Diameters
Refer to the following tables for applicable length, elbows,
and pipe diameter for construction of the vent/flue pipe sys-
tem of a non-direct vent installation. In addition to the vent/
flue pipe, a single 90° elbow must be secured to the com-
bustion air intake to prevent inadvertent blockage. The tee
or elbows used in the vent/flue termination must be included
when determining the number of elbows in the piping sys-
tem.
WARNING
W
HEN THE
CAUTION
21