AAON RL-240 - Manual (Page 25)

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If codes require a condensate drain line, the
line should be the same pipe size or larger
than the drain connection, include a p-trap,
and pitch downward toward drain. An air
break should be used with long runs of
condensate lines.
Installation
AAON equipment is designed to be easily
installed and serviced.
Locating Units
The curb should be mounted first and must
be located so that duct connections will be
clear of structural members of the building.
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.
Table 1 - Unit Clearances
Location Clearance
Front
100”
Back
100”
Left End
100”
Right End
100”
Top Unobstructed
Figure 1 - RL Series Unit Orientation
Condenser coils and fans must be free of any
obstructions in order to start and operate
properly with a correct amount of airflow.
For proper unit operation, the immediate
area around the condenser must remain free
of debris that may be drawn in and obstruct
airflow in the condensing section.
Consideration must be given to obstruction
caused by snow accumulation when placing
the unit.
Curb Installation
Make openings in the roof decking large
enough to allow for duct penetrations and
workspace only. Do not make openings
larger than necessary. Set the curb to
coincide with the openings. Make sure curb
is level.
Unit specific curb drawing is included with
job submittal. See SMACNA Architectural
Sheet Metal Manual and HVAC Duct
Construction Standards for curb installation
details.
Unit should not be operated without a
p-trap. Failure to install a p-trap may
result in overflow of condensate
water.
CAUTION
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