Installation Positions - Goodman *MVM96 Installation Instructions Manual

(c) The minimum size of outdoor opening(s) shall be the full size of
outdoor opening(s) calculated in accordance with 9.3.3, multi-
plied 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
hr (0.034 m /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 specified 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 specified. 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 fixed 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 fireblock is removed.
9.3.8.2 Ducts shall terminate in an unobstructed space, allowing free move-
ment 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 open-
ings 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.
9.3.8.5 Ducts shall not be screened where terminating in an attic space.
9.3.8.6 Horizontal upper combustion air ducts shall not slope downward
toward the source of combustion air.
9.3.8.7 The remaining space surrounding a chimney liner, gas vent, special
gas vent, or plastic piping installed within a masonry, metal, or factory
built chimney shall not be used to supply combustion air.
Exception: Direct vent appliances designed for installation in a solid fuel-
burning fireplace where installed in accordance with the manufacture's
3
/min per 1000 Btu/ installation instructions.
9.3.8.8 Combustion air intake openings located on the exterior of the
building shall have the lowest side of the combustion air intake openings
located at least 12 in. (300 mm) vertically from the adjoining grade level.
I
NSTALLATION
A/GMVM96 models may be installed upflow or horizontally
with left or right side down. A/GCVM96 models may be in-
stalled downflow or horizontally with left or right side down.
Do not install this furnace on its back. For upright upflow fur-
naces, return air ductwork may be attached to the side panel(s)
and/or basepan. For horizontal upflow furnaces, return air duct-
work must be attached to the basepan. For both upright or
horizontal counterflow furnaces, return ductwork must be attached
to the basepan (top end of the blower compartment). NOTE:
Ductwork must never be attached to the back of the furnace.
Refer to "Recommended Installation Positions" figure for appro-
priate installation positions, ductwork connections, and resulting
airflow arrangements.
13
P
OSITIONS