AAON RQ-006 - Manual (Page 29)

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only. Do not make openings larger than
necessary. Set the curb to coincide with the
openings. Make sure the curb is level. Unit
must be level in both horizontal axes to
support the unit and reduce noise and
vibration.
Be careful to install the provided gasket
according to Figure 3 prior to setting the unit
on the curb.
All roofing work should be performed
by competent roofing contractors to
avoid any possible leakage.
CAUTION
Where the supply or warm air duct
passes through a combustible roof, a
clearance of 1 inch must be
maintained between the outside
edges of the duct and combustible
material in accordance with National
Fire Protection Association Standard
No.
90A. Provide flashings or
enclosure between structure and roof
and all joints must be sealed with
mastic roofing to ensure a watertight
seal.
CAUTION