- 8 - For more information, visit www.desatech.comMantels or any other combustible material also may come upto the side edge of the black metal face of the fireplace just aslong as the projection from the front face fall within the limitshown in figure 19.OPERATING GUIDELINES AND MAINTENANCEINSTRUCTIONSGLASS DOORSGlass doors are optional with the fireplace. When thefireplace is in operation, doors must in FULLY OPENED orFULLY CLOSED position only or a fire hazard may becreated (see figure 20).A fireplace equipped with glass doors operates muchdifferently than a fireplace with an open front. A fireplacewith glass doors has a limited amount of air for combustion.Excessive heat within the fireplace can result if too large a fireis built or if the combustion air gate is not completely open.The following tips should be followed to assure that both thefireplace and the glass door retain their beauty and functionproperly. Both the flue damper and the glass doors must befully opened before starting the fire. This will providesufficient combustion air and maintain safe temperatures inthe firebox.IMPORTANT: The glass must be allowed to warm slowlyand evenly. The tempered glass will withstand a gradualtemperature rise to 550 degrees Fahrenheit, which is morethan a normal fire will generate. Such materials as pitch/waxladen logs, very dry mill end lumber, and large amounts ofpaper or cardboard boxes can create an excessively hot fireand should not be burned in this fireplace. Always keep thefire well back from the doors and never allow flames tocontact the glass.CLEANING THE GLASSClean the glass with any commercial glass cleaner or soap andwater. Do not use any abrasive material to clean the glass. Donot clean the glass with any cool water if the glass is still hotfrom the fire and smoke.Figure 20 GLASS DOORSWARNING: Fireplaces equipped with glass doorsshould be operated only with doors fully opened or doorsfully closed. Doors, if left partly open, may draw gas andflame out of the fireplace opening creating risks of bothfire and smoke.Figure 18 MANTEL CLEARANCEFigure 18a MANTEL CLEARANCEFigure 19 SIDE CLEARANCE