Baymak HT Boiler Combustion Chamber Asbestos Board – Duraboard Ceramic Fiber Insulation Plate

This is a duraboard type ceramic fiber insulation plate used in the combustion chamber of Baymak HT series boilers. This part, simply called asbestos in the field, keeps the heat of the burner flame inside the combustion chamber and limits heat transfer to the casing and surrounding parts. Plates produced today do not contain asbestos; they are ceramic fiber based.

When Should the Asbestos Board Be Replaced in a Baymak HT Boiler?

• If the plate is cracked, broken at the edge or crumbles by hand.
• If it sheds pieces every time the combustion chamber cover is opened.
• If the plate has come out of place or become deformed during replacement of the burner, heat exchanger or cover gasket.

Installation and Usage Notes

• The opening in the center of the plate aligns with the burner throat and the holes at the edges with the cover studs; it must not be forced into place.
• The ceramic fiber plate is fragile; it should be kept flat when carrying and fitting, and not pressed at a single point.
• During replacement, old plate residues and soot in the combustion chamber should be cleaned out.
• To select the correct part, compare the diameter and hole layout of the removed plate.