4 | Regency Horizon HZ54E-10 Gas Fireplace|4 table of contentsCopy of Safety Decal .....................................................5MA Code - CO Detector.................................................6Unit Dimensions ............................................................7Faceplate & Door frame overlay Dimensions ................7Important 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.....................................................13Framing Dimensions....................................................14Unit Assembly Prior To Installation ..............................15Standoff Assembly ...............................................15nailing Strips........................................................15Venting Introduction .....................................................15Wall mount On / Off Switch installation........................16Vent Restrictor Position ...............................................17Exterior Vent Termination Requirements .....................18Venting Arrangements ................................................19Horizontal Termination (Flex) ...............................19Rigid Pipe Venting Systems ........................................20Basic Horizontal & Vertical Terminations .............205” x 8” Rigid Pipe Cross Reference Chart ...................21Venting Arrangements ................................................23Allowable Horizontal Terminations for HZ54e-ng 23Venting Arrangements ................................................23Allowable Horizontal Terminations for HZ54e-lp .23Venting Arrangements ................................................26Allowable Vertical Terminations for HZ54e-ng.....26Venting Arrangements ................................................27Allowable Vertical Terminations for HZ54e-lp ......27Unit Installation with Horizontal Termination ................28Unit Installation with Vertical Termination ....................29Unit Installation Horizontal Termination .......................30with Flex Vent System .........................................30High elevation .............................................................31Gas Line Installation ....................................................31Pilot Adjustment ...........................................................31Gas Pipe Pressure Testing ..........................................31885 S.I.T. Valve Description.........................................31Valve cover removal ....................................................32Aeration Adjustment ....................................................33Wiring Diagram ............................................................34Optional Reflective Panel Installation ..........................35Glass Crystals or optional stones ................................36Installation On Burner ..................................................36Optional PebbleS / GLASS crystal Installationfor Firebox Base (AROUnD BURneR) .......................36Optional driftwood Log set Installation.........................37Optional Log set Installation ........................................39Faceplate & Door frame overlay Installation................42Optional fan installation ...............................................44Wiring diagram with optional fan .................................46Operating Instructions .................................................47First Fire ......................................................................47normal Operating Sounds of Gas Appliances .............47Lighting Procedure ......................................................48Shutdown Procedure ...................................................48Copy of Lighting Plate Instructions ..............................49Maintenance Instructions.............................................50General Vent Maintenance ..........................................50Glass Gasket ...............................................................50Glass Door...................................................................50Glass Replacement .............................................50Glass Door Removal ...................................................51Mesh barrier removal / installation...............................52Valve Tray Replacement..............................................53HZ54e-nG unit ............................................................54HZ54e-LP unit .............................................................55Main Assembly ............................................................56Accessories .................................................................58The Warranty: Limited Lifetime ...................................59