Amana GMES9 Series User Manual

SYSTEM OPERATION
12
Furnace
Water
Heater
Chimney or Gas Vent






Outlet air duct
Inlet air duct

through Horizontal Ducts.
9.3.3.2* One Permanent Opening Method. One permanent openings,
commencingwithin12in.(300mm)ofthetopoftheenclosure,shallbe
provided.Theapplianceshallhaveclearancesofatleast1in.(25mm)from
thesidesandbackand6in.(150mm)fromthefrontoftheappliance.The
opening shall directly communicate with the outdoors or shall communicate
through a vertical or horizontal duct to the outdoors or spaces that freely
communicate with the outdoors (see Figure A.9.3.3.2) and shall have a
minimum free area of the following:
(1) 1in.
2
/3000 Btu/hr (700 mm
2
per kW) of the total input rating of all
appliances located in the enclosure, and
(2) Notlessthanthesumoftheareasofallventconnectorsinthespace.
Furnace
Water
Heater
Opening
Chimney or Gas Vent







Alternate
Opening
Location

From Outdoors through Single Combustion Air Opening.
9.3.4 Combination Indoor and Outdoor Combustion Air. The use of a
combination of indoor and outdoor combustion air shall be in accordance
with (1) through (3) (see example calculation in Annex J]:
(1) Indoor Openings: Where used, openings connecting the interior spaces
shallcomplywith9.3.2.3.
(2) Outdoor Opening(s) Location. Outdoor opening(s) shall be located in
accordancewith9.3.3.
(3) Outdoor Opening(s) Size. The outdoor opening(s) size shall be calcu-
lated in accordance with the following:
(a) The ratio of the interior spaces shall be the available volume of
allcommunicatingspacesdividedbytherequiredvolume.
(b) The outdoor size reduction factor shall be 1 minus the ratio of
interiorspaces.
(c) The minimum size of outdoor opening(s) shall be the full size
ofoutdooropening(s)calculatedinaccordancewith9.3.3,mul-
tipliedbythereductionfactor.Theminimumdimensionofair
openingsshallnotbelessthan3in.(80mm).
9.3.5 Engineered Installations. Engineered combustion air installations
shall provide an adequate supply of combustion, ventilation, and dilution
airandshallbeapprovedbytheauthorityhavingjurisdiction.
9.3.6 Mechanical Combustion Air Supply. Where all combustion air
is provided by a mechanical air supply system, the combustion air shall
besuppliedformoutdoorsattheminimumrateof0.35ft
3
/min per 1000
Btu/hr(0.034m
3
/minperkW)forallapplianceslocatedwithinthespace.
9.3.6.1 Where exhaust fans are installed, additional air shall be provided
toreplacetheexhaustedair.
9.3.6.2 Each of the appliances served shall be interlocked to the mechanical
air supply system to prevent main burner operation where the mechanical
airsupplysystemisnotinoperation.
9.3.6.3 Where combustion air is provided by the building’s mechanical
ventilationsystem,thesystemshallprovidethespeciedcombustionair
rateinadditiontotherequiredventilationair.
9.3.7 Louvers, Grilles, and Screens.
9.3.7.1 Louvers and Grilles. The required size of openings for combus-
tion, ventilation, and dilution air shall be based on the net free area of
eachopening.Wherethefreeareathroughadesignoflouverorgrilleor
screen is known, it shall be used in calculating the size opening required
toprovidethefreeareaspecied.Wherethelouverandgrilledesignand
free area are not known, it shall be assumed that wood louvers will have
25 percent free area, and metal louvers and grilles will have 75 percent free
area.Nonmotorizedlouversandgrillesshallbexedintheopenposition.
9.3.7.2 Minimum Scree Mesh Size. Screens shall not be smaller than
1/4in.mesh.
9.3.7.3 Motorized Louvers. Motorized louvers shall be interlocked with
the appliance so they are proven in the full open position prior to main
burnerignitionandduringmainburneroperation.Meansshallbeprovided
to prevent the main burner form igniting should the louver fail to open
during burner startup and to shut down the main burner if the louvers close
duringburneroperation.
9.3.8 Combustion Air Ducts. Combustion air ducts shall comply with
9.3.8.1through9.3.8.8.
9.3.8.1 Ducts shall be constructed of galvanized steel or a material having
equivalentcorrosionresistance,strength,andrigidity.
Exception: Within dwellings units, unobstructed stud and joist spaces shall
not be prohibited from conveying combustion air, provided that not more
than one reblock is removed.
9.3.8.2 Ducts shall terminate in an unobstructed space, allowing free
movementofcombustionairtotheappliances.
9.3.8.3 Ductsshallserveasinglespace.
9.3.8.4 Ducts shall not serve both upper and lower combustion air openings
wherebothsuchopeningsareused.Theseparationbetweenductsservicing
upper and lower combustion air openings shall be maintained to the source
ofcombustionair.

Amana GMES9 Series Specifications

General

Brand	Amana
Model	GMES9 Series
Category	Furnace
Language	English