Yearly Maintenance; General Checklist; Inspect The Catalytic Combustor - Vermont Castings Defiant 1945 Service Manual

APPENDIX #1
YEARLY MAINTENANCE SUGGESTIONS
The 1945 Defiant is a sophisticated combustion machine, and regular "fine tuning" will give
you the full benefits of its operating potential.

GENERAL CHECKLIST

• Inspect the chimney for blockage such as squirrels, nests, branches, etc.
• Have a chimney sweep inspect and clean the chimney if necessary.
• Inspect the connector pipe for wear and replace if necessary.
• Make sure each length of connector pipe, if single wall, is joined by three screws.
• Inspect the stove gaskets for wear using the "Dollar Bill Test" and replace as
necessary.
• Remove any surface rust and repaint any heat shields or chimney connectors.

INSPECT THE CATALYTIC COMBUSTOR

Fly ash can accumulate on top of the combustor. If sufficient quantity accumulates, it can
block the flow of gases through it and cause restriction and back-puffing.
• Remove the throat baffle from the stove lifting it up[ off the tabs.
• Remove the left and right wedges that hold the lower fireback in place, and remove
the lower fireback by pulling forward from the top first.
• Gently pry off the refractory catalyst cover with a flat blade screwdriver. Remember
the proper alignment for reinstalling the cover.
• Visually inspect the catalyst for fly ash using a small mirror. It is not necessary to
remove the catalyst for this purpose.