88 Installing a Common Vent System
3. Reinstall the gasket and maintenance port
cover, and then fix them with a set screw.
Note
If condensate comes out the port when
opened, check for proper drainage or
any blockage.
4. Visually inspect the maintenance port to ensure
that the gasket is properly installed between the
maintenance port and the maintenance port
cover.
WARNING
Carbon Monoxide Hazard
To prevent serious injury or death, ALWAYS
check the gasket is properly installed under
the maintenance port cover after checking
the operating condition of the damper plate
through the maintenance port.
Harmful exhaust gas may leak if the gasket is
not installed, or if it is not installed properly.
Gasket
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