Heatiator C40 D. Position the Hearth Extension, E. Finishing Material, Warning! Fire Risk

D. Position the Hearth Extension

Position and secure the hearth extension over the protective metal strips that have been placed partially under the fireplace front. These strips should be protruding approximately 2 in. (51 mm) from under the fireplace front and 2 in. (51 mm) on both sides of the fireplace opening. See Figure 10.7.

Seal the crack between the hearth extension and fireplace with a bead of non-combustible sealant. See Figure 10.8. Apply a non-combustible finishing material of your choice to the hearth extension.

NOTICE: see pages 36-37 and 55, “clearances to combus- tibles, hearth extensions / floor protection” for clearances required for different hearth extension installations. The clearances must be strictly adhered to.

Pallet	1 in. (25mm) Overlap
Mounting
Brackets

Protective metal strips are placed 2 in.(51mm) under the front of the fireplace and must extend beyond the front and sides of fireplace opening by 2 in. (51mm). Nail or screw metal strips in place.

Figure 10.7 Positioning the Protective Metal Hearth Strips

Warning! Fire Risk!

Hearth extensions are to be installed only as illustrated to prevent high tempertures from occurring on concealed combustible materials.

Hearth sealing strips prevent burning or hot particles from inadvertently falling directly on combustible surfaces in the event the building should settle and disturb the original construction.

Seal with

non-combustible

sealant

Figure 10.8 Position the Hearth Extension

E. Finishing Material

WARNING! Do not install combustible materials over the metal fireplace face of the fireplace! This poses a safety hazard and may start a fire.

You may only use noncombustible material over the metal face of the fireplace.

NOTICE: The decorative fascia must be removable for future serviceability of the Automatic Combustion Control.

•Combustible Material

Materials made of or surfaced with wood, compressed paper, plant fibers, plastics, or other materials that can ignite and burn, whether flame proofed or not, or whether plastered or un-plastered shall be considered combus- tible materials.

•Non-Combustible Material

Materials which will not ignite and burn. Such materials are those consisting entirely of steel, iron, brick, tile, con- crete, slate, glass or plasters, or any combination thereof.

Materials that are reported as passing ASTM E 136, Standard Test Method for Behavior of Materials, in a Ver- tical Tube Furnace at 750°C, shall be considered non- combustible materials.

Page 56 Heatilator • Constitution EPA Fireplace • 480-1091D 4/20/11