14 7044-225D August 3, 201531-I ACCF. Prefabricated Metal ChimneyFigure 14 .1E. Metal Heat Circulating MasonryThe chimney can be new or existing, masonry or prefabricatedand must meet the following minimum requirements:• Must be minimum 6 inch (152mm) inside diameter ofhigh temperature chimney listed to UL 103 HT (2100 o F)or ULC S628.• Must use components required by the manufacturer forinstallation.• Must maintain clearances required by the manufacturerfor installation.• Refer to manufacturers instructions for installation•This insert is listed to UL 1482 Standard and is approvedfor installation into listed factory-built zero clearance fire-places listed to UL 127 conforming to the following spec-ifications and instructions:•The original factory-built clearance fireplace chimneycap must be re-installed after installing the approvedchimney liner meeting type UL 103 HT requirements(2100°F) per UL 1777.•If the chimney is not listed as meeting HT requirements,or if the factory built fireplace was tested prior to 1998, afull height listed chimney liner must be installed from theappliance flue collar to the chimney top.•The liner must be securely attached to the insert flue collarand the chimney top.•The air flow of the factory-built zero-clearance fireplacesystem must not be altered. The flue liner top supportattachment must not reduce the air flow for the existingair-cooled chimney system.•No dilution air is allowed to enter the chimney.1. Secure the fireplace damper in the open position. Ifthis cannot be accomplished, it will be necessary toremove the damper2. Seal damper area of chimney around chimneyconnector with a high temperature sealant or sealinsert against the face of the fireplace.3. Both methods must be removable and replaceablefor cleaning and re-installation.Minimum 8” (203mm) Masonry Thicknessin Front of Smoke ChamberDamper Plate Removed orFastened in Open PositionSeal with Non-Combustible MaterialMinimum Clearance in Accordance withInsert ListingFloor Protection inAccordance with InsertListingCombustible FloorAirtight Insulated Clean-OutStainless Steel Chimney ConnectorMust Extend to Flue LinerFlue Liner with Required Air SpaceThis insert conforms with the safety standard UL-1482 andULC S628 (Canada) in all respects and is approved to UL &ULC safety standards for installation and use within a fire-place with masonry chimney, in accordance with NFPA 211,with a direct flue collar connection.Generic Insert Model Shown in Illustration