AAON M2-036 - Manual (Page 30)

30
Installation
AAON equipment has been designed for
quick and easy installation.
Locating Units
Verify rooftop, foundation or mounting
frame can support the total unit weight,
including accessory weights.
Before setting the unit into place, caution
must be taken to provide clearance for unit
doors that must be accessible for periodic
service. These areas contain the controls,
safety devices, refrigerant or water piping,
shut-off valves and filters.
A minimum clearance equal to the width of
the unit is required on the access panel side
of the unit to ensure there is enough room to
slide out coils and energy recovery wheels,
and to access filters, fans and other internal
components.
Depending on natural gas and propane
heating module orientations, the combustion
air inlets or vent (flue) gas discharges may
be located in the unit roof or sides. There
must be 6 feet of clearance between these
roofs/sides and building walls, parapets,
adjacent buildings, or equipment. If
equipment is for replacement and required
clearances are not available, contact AAON
for recommendations.
For gas fired unit, do not position flue
opening to discharge into a fresh air intake
of any other piece of equipment. Unit should
also be installed so that the flow of
combustion intake air is not obstructed from
reaching the furnace.
Outdoor vent opening must not be blocked
by snow. A minimum 12” curb must be used
or the vent outlet shall be greater than 12”
off the ground/roof.
Flue gas is dangerously hot and contains
containments. The user is responsible for
determining if vent gases may degrade
building materials.
The National Gas and Propane Installation
Code, B149.1 specifies a 6 ft. horizontal
vent terminal clearance to gas and electric
meters and relief devices.
When locating gas fired units, it is
recommended the unit be installed so
that the flue discharge vents are
located at least 120 inches away
from any opening through which
combustion products could enter the
building.
WARNING
Distances from adjacent public
walkways, adjacent buildings,
operable windows and building
openings, shall conform to local
codes and/or the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, or the
National Gas & Propane Code, CSA
B149.1
WARNING
Improper installation, adjustment,
alteration, service, or maintenance
can cause property damage,
personal injury or loss of life.
Installation and service must be
performed by a trained, qualified
installer or service agency. A copy of
this IOM should be kept with the unit.
WARNING