4 | Regency Horizon ® HZ54E-10 Gas Fireplace|4table of contentsCopy of Safety Decal .....................................................5MA Code - CO Detector ................................................6DimensionsUnit Dimensions ............................................................7Faceplate & Door frame overlay Dimensions ................7InstallationImportant Message ......................................................8Before You Start .............................................................8General Safety Information ............................................8Installation Checklist ......................................................9Locating Your Gas Fireplace ..........................................9Heatwave Duct System .................................................9Heat Release kit ............................................................9Clearances ..................................................................10Non-Combustible Requirements..................................10Non combustible facing board .....................................11Non-combustible facing installation ............................11Mantel Clearances.......................................................12Mantel Leg Clearances................................................12Framing & Finishing .....................................................13Unit Assembly Prior To Installation ..............................14Standoff Assembly ...............................................14Nailing Strips........................................................14Venting Introduction .....................................................14Framing Dimensions ....................................................15Optional Framing Kit ....................................................16wall mount On / Off Switch / receiver installation.........17Vent Restrictor Position ...............................................18Exterior Vent Termination Requirements .....................19Venting Arrangements ................................................20Horizontal Termination (Flex) ...............................20Rigid Pipe Venting Systems.........................................21Basic Horizontal & Vertical Terminations .............215” x 8” Rigid Pipe Cross Reference Chart ...................22Venting Arrangements ................................................24Allowable Horizontal Terminations for HZ54E-ng .24Venting Arrangements ................................................24Allowable Horizontal Terminations for HZ54E-lp ..24Venting Arrangements ................................................27Allowable Vertical Terminations for HZ54E-ng .....27Venting Arrangements ................................................28Allowable Vertical Terminations for HZ54E-lp ......28Unit Installation with Horizontal Termination ................29Unit Installation with Vertical Termination ....................30Unit Installation ............................................................31Horizontal Termination with Flex Vent System .............31High Elevation..............................................................32Gas Line Installation ....................................................32Pilot Adjustment...........................................................32Gas Pipe Pressure Testing ..........................................32885 S.I.T. Valve Description .........................................32Valve cover removal.....................................................33Aeration Adjustment ....................................................34Wiring Diagram ............................................................35Optional Wall Thermostat Installation ..........................36Optional Reflective Panel Installation ..........................37Glass Crystals or optional stones ................................38Installation On Burner ..................................................38Optional Pebbles / glass crystal Installation ................38Optional driftwood Log set Installation.........................39Faceplate & Door frame overlay Installation ................41Wiring diagram with optional fan .................................47Operating InstructionsOperating Instructions .................................................48First Fire ......................................................................48Normal Operating Sounds of Gas Appliances .............48Lighting Procedure ......................................................49Shutdown Procedure ...................................................49Copy of Lighting Plate Instructions ..............................50MaintenanceMaintenance Instructions ............................................51General Vent Maintenance ..........................................51Glass Gasket ...............................................................51Glass Door...................................................................51Glass Replacement .....................................................51Glass Door Removal....................................................52safety screen removal / installation..............................53Valve Tray Replacement ..............................................54HZ54E-NG unit ............................................................55HZ54E-LP unit .............................................................56PartsMain Assembly ............................................................57Accessories .................................................................59WarrantyThe Warranty: Limited Lifetime ...................................60