AAON BL-600 - Manual (Page 21)

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Figure 7 - Boiler Vent Shipping Covers
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.
Figure 8 - Boiler Vent Components
Gaskets must be in proper position or flue
gases could leak.
Failure to follow proper joint
connection procedure may result in
carbon monoxide gas poisoning due
to flue gas leakage.
WARNING