AAON LL-540 - Manual (Page 30)

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sheet metal screws, locate the exhaust piping
that is also shipped along with the unit. The
exhaust piping that must be attached to the
internal exhaust vent piping includes the
vent length, 90 degree elbow and rain cap.
Examine
all components prior to
installation. The female end of each vent
pipe component incorporates a sealing
gasket and a mechanical locking band.
Figure 8 - Boiler Vent Components
Intake and exhaust covers are in place for
shipping. These must be removed and
external intake/exhaust components must be
installed prior to boiler operation.
Gasket must be in proper position or flue
gases could leak.
Securely fasten the vent pipe joints
according to the following procedure.
1. Insert the male end into the female
section. Push the units together and turn
them until the bead of the male end is
seated against the flared end of the
female
section. This creates the
necessary airtight seal. Align the seams
on the vent lengths and orient them
upward in all horizontal applications.
2. Tighten the locking band with a nut
driver until snug plus 1/4 turn.
Before proceeding, recheck all joints and
ensure that all male sections extend to the
top of the flared female end and all clamps
are tightened.
Figure 9 - Correct Vent Pipe Connection
Failure to follow proper joint
connection procedure may result in
carbon monoxide gas poisoning due
to flue gas leakage.
WARNING