AAON RZ Series, Installation Operation & Maintenance

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Failure to attach and seal the end of unit with
the flashings will result in water leakage into
the curb.
Figure 13 - Factory Supplied End Flashings
Vestibule Exhaust Fan
Prior to unit operation of units with service
vestibules the exhaust fan shipping support
must be removed from the exterior of the
unit.
The exhaust fan also includes a factory
provide exterior rain hood which must be
installed.
Figure 14 - Vestibule Exhaust Fan
Motorized Exhaust & Rain Hood
Narrow (100”) – The motorized exhaust
damper and rain hood ships inside of the
return air section. For proper unit operation,
the motorized exhaust damper must be
installed in the field. Once the motorized
exhaust is screwed into place and has been
sealed with butyl caulking, attach a rain hood
above the motorized exhaust. Upon screwing
the rain hood into place over the motorized
exhaust, apply a seal of butyl caulking around
the edges of the rain hood.
Wide (142”) – The RZ unit will arrive with
the motorized exhaust already in place. The
rain hood ships inside of the return air section
and must be field installed. After screwing
the rain hood over the motorized exhaust with
sheet metal screws, apply a sealant of butyl
caulking.
Figure 15 - Motorized Exhaust
In order to prevent water leakage into
the roof curb, the factory provided
sheet metal flashings MUST BE
attached to the unit base to cover the
shipping slots at both ends of the unit.
CAUTION